Page 1 ® 2635A Hydra Series II Data Bucket Users Manual PN 686698 November 1997 © 1997 Fluke Corporation, All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies.
Page 2 Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price.
Page 3: Table Of Contents
Table of Contents Chapter Title Page Preparation for Use................1-1 Introduction ....................... 1-5 Operating Modes ....................1-5 Front Panel Operation ................... 1-7 Memory Card Operation ................1-7 Computer Operation..................1-8 Printer Operation................... 1-8 Modem Operation ..................1-8 Measurement Capabilities ................. 1-9 Mx+B Scaling ....................
Page 4 2635A Users Manual Digital I/O ....................1-18 Totalizer Input ..................1-18 Controls and Indicators ..................1-19 Front Panel Controls ..................1-19 Front Panel Indicators ................... 1-19 Front Panel Operations ..............2-1 Summary of Front Panel Operations ..............2-5 Configuring the Instrument for Operation............2-6 Turning the Power on..................
Page 5 Contents (continued) Triggering Options and Memory Card Operation ........2-31 Totalizer Operation ..................2-32 Digital Input/output Lines................2-33 Setting Date and Time................... 2-34 Reading Instrument Software Versions ............2-35 Returning to the Local Mode ................ 2-35 Front Panel Key Lockout Options ..............2-36 Instrument Interfaces ..................
Page 6 2635A Users Manual How the Instrument Processes Output ............4-13 Status Registers ..................... 4-14 Instrument Event Register (IER) .............. 4-14 Standard Event Status Register (ESR)............4-16 Status Byte Register (STB)............... 4-17 Computer Interface Command Set..............4-18 Xmodem File Transfers ................4-18 Printer Operations ................
Page 7 Contents (continued) Appendices A Specifications....................A-1 B Crosstalk Considerations ................B-1 C Binary Upload of Logged Data..............C-1 D RS-232 Cabling................... D-1 E 8-Bit Binary-Coded-Decimal Table............E-1 Memory Card File Formats................. F-1 G True RMS Measurements ................G-1 Index...
Page 8 2635A Users Manual...
Page 9 List of Tables Table Title Page 1-1. Data Bucket Features..................... 1-6 1-2. Options and Accessories..................1-11 1-3. Front Panel Keys Description................1-21 1-4. Annunciator Descriptions ..................1-22 2-1. Configuration Reset (Default) Settings ..............2-7 2-2. Selftest Error Codes....................2-7 2-3. Thermocouple Ranges ...................
Page 10 2635A Users Manual A-11. AC Voltage Measurements - Accuracy ..............A-9 A-12. AC Voltage Measurements..................A-10 A-13. Resistance Measurements - Resolution..............A-11 A-14. Resistance Measurements - Accuracy (Four-Wire)..........A-11 A-15. Frequency Measurements-Resolution and Accuracy ..........A-12 A-16. Frequency Measurements - Input Sensitivity ............A-12 A-17.
Page 11 List of Figures Figure Title Page 1-1. Data Bucket Front and Rear Panels ............... 1-7 1-2. Typical Front Panel Display While Scanning ............1-8 1-3. Adjusting the Handle ..................... 1-12 1-4. Connecting the Instrument to a Power Source............1-13 1-5. Universal Input Module Connections..............
Page 12 C-3. Example ......................... C-8 D-1. Summary of RS-232 Connections ................. D-3 D-2. Hydra Series II (DB-9) to PC (DB-9) RS-232 Connection (Generic) ....D-4 D-3. Hydra (DB-9) to PC (DB-25) RS-232 Connection..........D-5 D-4. Hydra Series II (DB-9 to Modem (DB-25) RS-232 Connection ......D-6 D-5.
Page 13 20402. Stock No. 004-000-00345-4. Declaration of the Manufacturer or Importer We hereby certify that the Fluke Model 2635A Data Bucket is in compliance with BMPT Vfg 243/1991 and is RFI suppressed. The normal operation of some equipment (e.g. signal generators) may be subject to specific restrictions. Please observe the notices in the users manual.
Page 14 Safety Terms in this Manual This instrument has been designed and tested in accordance with iec publication 1010, safety requirements for electrical measuring, control and laboratory equipment. This user manual contains information, warnings, and cautions that must be followed to ensure safe operation and to maintain the instrument in a safe condition.
Page 15 Contents (continued) AC Power Source The instrument is intended to operate from an ac power source that will not apply more than 264v ac rms between the supply conductors or between either supply conductor and ground. A protective ground connection by way of the grounding conductor in the power cord is required for safe operation.
Page 16 Ten Minute Tour Introduction Note This manual contains information and warnings that must be followed to ensure safe operation and keep the instrument in safe condition. Data Bucket operation and operational features can be understood in about ten minutes by completing the following procedure. Prior to staring the procedure, connect the instrument to a power source (see Chapter 1) and connect the supplied test leads to the front panel jacks (Channel 0).
Page 17 Ten Minute Tour (continued) Applying power. Press the power switch to POWER apply power. Other power-on options include Configuration-Reset, Display-Hold, Temperature-Toggle. [Figure 2-2] Selecting a Channel. Up/down arrow keys select a channel from 0 to 20. Channel 0 connections are on the front panel; Channels 1 through 20 connections are via the rear-panel Universal Input Module.
Page 18 2635A Users Manual Selecting a Channel. Select Channel 0 with the up/down arrow keys. Notice each key entry is acknowledged with a short "beep." Try the left/right arrow keys and notice a long beep. Short beeps represent correct entries; long beeps represent incorrect entries.
Page 19 Ten Minute Tour (continued) Selecting the Monitor Mode. Press the MON key to enable monitoring. Up/down arrow keys select any configured channel for monitoring. When Channel 0 (Ω) is selected, touch the probe tips together to measure test lead resistance. Channel 10 (VAC) may have a small reading because the input is unterminated.
Page 20 2635A Users Manual INTVL Setting the Scan Interval. Press the INTVL key to open the interval menu. Up/down and left/right arrow keys select 0:00:00 (default) to 9:99:99. The format is HOURS:MINUTES:SECONDS. 0:00:00 The scan interval is the total time between the start of each measurement cycle.
Page 21 Ten Minute Tour (continued) ALRM Selecting Alarms. Press the ALRM key to open SET ALARM the alarm menu. Each configured channel can have two alarm limits assigned. An alarm is set when a reading is below or above an alarm limit. Configuration starts with an alarm limit selection, 1 or 2.
Page 22 2635A Users Manual SHIFT INTVL Setting Date and Time. Press the SHIFT key, yEAR release, then press the INTVL key to open the date and time (CLOCK) menu. Up/down and left/right arrow keys select the YEAR 00 to 99. For the complete procedure, this is followed by MONTH:DAY and HOURS:MINUTES.
Page 23 Ten Minute Tour (continued) SHIFT Selecting Triggering Options. Press the SHIFT tRIg key, release, then press the MON key to open the TRIGS option menu. A trigger option can ALAr trigger scanning, instead of using the SCAN key. OFF indicates no triggering option; ON indicates the external trigger option is active (a contact closure or voltage transition between pins TR and on the rear panel ALARM OUTPUTS connector);...
Page 24 2635A Users Manual LIST Setting the LIST Parameters. Press the LIST LISt key to open the LIST menu. LIST is used to print out all the measurements from the Review Array, or print out a directory of all the files on the memory card by selecting dir (Directory).
Page 25 Ten Minute Tour (continued) FILES Selecting the File Options. Press the FILES FILES key to open the Files menu. This menu selects the memory card functions. SEtUP (Setup) Init selects card functions instrument StAt configuration files (SEtxx); dAtA (Data) selects card functions for measurement data files dAtA (dAtxx);...
Page 26 2635A Users Manual xxiv...
Page 27: Preparation For Use
Chapter 1 Preparation for Use Title Page Introduction ....................... 1-5 Operating Modes ....................1-5 Front Panel Operation ................... 1-7 Memory Card Operation ................1-7 Computer Operation..................1-8 Printer Operation................... 1-8 Modem Operation ..................1-8 Measurement Capabilities ................. 1-9 Mx+B Scaling ....................1-9 Alarms ......................
Page 28 2635A Users Manual Totalizer Input ..................1-18 Controls and Indicators ..................1-19 Front Panel Controls ..................1-19 Front Panel Indicators ................... 1-19...
Page 29 Preparation for Use Introduction...
Page 30 2635A Users Manual REV IEW LAST mVD CAC k Hz 300V BUS Y BAT T OP80F.EPS...
Page 31: Introduction
(supplied). For a quick introduction to the operation of the instrument, complete the Ten- Minute Tour at the front of this manual. A summary of the Hydra Series II Data Bucket features is provided in Table 1-1 and complete specifications in Appendix A. Figure 1-1 shows the instrument front and rear panels.
Page 32 2635A Users Manual Table 1-1. Data Bucket Features • Channel Scanning Can be continuous scanning, scanning at an interval time, single scans, or triggered (internal or external) scans. Channel Monitoring may be used while scanning. • Channel Monitoring Make measurements on a single channel and view these measurements on the display. •...
Page 33 Preparation for Use Operating Modes Ground Terminal. AC Power Connector. Universal Input Module. Connects mainframe Connect to any line source Directly wires 20 analog inputs to ground. of 90 to 264 VAC (50/60 Hz). (Channels 1 to 20) without external signal conditioning. CAUTION FOR FIRE PROTECTION REPLACE WITH T 1/8A 250V (SLOW) FUSE...
Page 34: Computer Operation
2635A Users Manual personal computer (PC), where data can be sent from the Data Bucket to the PC over an RS-232 link (up to a 38,400 baud rate), or the card can be removed and taken to a PC equipped with a memory card reader (see Options and Accessories). Memory card operations are discussed in Chapter 3.
Page 35: Measurement Capabilities
Preparation for Use Measurement Capabilities Measurement Capabilities Before scanning is enabled, the Data Bucket channels are configured for measuring the selected electrical or physical parameter (volts dc, volts ac, temperature, etc.). Readings have five digits of resolution, for example, 15.388 VAC. Scanning collects measurement data, while the monitor mode can monitor a channel with or without scanning.
Page 36: Hydra Starter Package
2635A Users Manual An extensive command set allows the user to develop custom software in GWBASIC, QBASIC, and QuickC. The command set is discussed in Chapter 4. Hydra Starter Package Starter is a DOS based, menu-driven software package used to transfer configuration data from and to the instrument, log measurement data collected by the instrument, extract data from the memory card, and manage the acquired data.
Page 37: Setting Up The Instrument
M00-200-634 Rackmount Kit 26XXA-600 Portable Battery Pack 688868 Hydra Series II Service Manual Setting Up the Instrument Setting up the instrument includes all preparatory information, from unpacking the instrument to application of power. Unpacking and Inspecting the Instrument The following items are included in the shipping container: •...
Page 38: Adjusting The Handle
2635A Users Manual • Line power cord • Type "T" Thermocouple • 256K-byte Memory Card Carefully remove the instrument from its shipping container and inspect the instrument for possible damage or missing items. If the instrument is damaged or anything is missing, contact the place of purchase immediately.
Page 39: Ac Operation
Preparation for Use Setting Up the Instrument LINE CORD (AC OPERATION) CAUTION FOR FIRE PROTECTION REPLACE WITH T 1/8A 250V (SLOW) FUSE MODEL: 2620A 2625A 2635A 90-264V 50/60 Hz 15VA IEC 664 INSTALLATIONCATEGORY II ALARM OUTPUTS DIGITAL I/O RS-232C IEEE STD-488 PORT Σ...
Page 40: Measurement Connections
2635A Users Manual Caution Do not exceed the specified input voltage levels or equipment damage could result. Measurement Connections W Warning To avoid electric shock: • When the input module is installed, consider all channels with connections as accessible terminals that may be hazardous live.
Page 41 Preparation for Use Measurement Connections STRAIN RELIEF H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L op05f.eps Figure 1-5.
Page 42 2635A Users Manual 2-WIRE (2T) CONNECTION 13 14 15 16 17 18 19 20 SOURCE H L H L H L H L H L H L H L H L H L (4-WIRE) SENSE H L H L H L H L H L H L H L H L H L (4-WIRE) RESISTANCE RTD SOURCE...
Page 43: Alarm Outputs Connections
Preparation for Use Measurement Connections Alarm Outputs Connections The eight-terminal rear panel ALARM OUTPUTS connector (Figure 1-7) serves three functions: DC power, alarm outputs, and external trigger input. Each is described below. Terminal Function ALARM OUTPUTS Positive Input for DC Operation –...
Page 44: Digital I/O Connections
2635A Users Manual 2. Loosen the wire clamp screw for the associated terminal. 3. Feed the wire into the gap between the connector body and the wire clamp. 4. Tighten the wire clamp screw. 5. Insert the connector in the rear panel. Digital I/O Connections The ten-terminal rear panel DIGITAL I/O connector (Figure 1-8) serves two functions: Digital I/O and Totalizer input.
Page 45: Controls And Indicators
Preparation for Use Controls and Indicators 4. Tighten the wire clamp screw. 5. Insert the connector in the rear panel. Controls and Indicators The front panel (Figure 1-1) provides a multipurpose display and a set of control keys. Each is described in the following paragraphs. Front Panel Controls The front panel keys (Figure 1-9) control all instrument operation: channel configuration, instrument configuration, measurement functions, and...
Page 46 2635A Users Manual FUNC REVIEW SCAN Mx+B ALARM LAST AUTO °C °F RO mV AC DC LIMIT HI Ω x1Mk op11f.eps Figure 1-11. Secondary Display FUNC REVIEW SCAN AUTO Mx+B ALARM LAST °C °F RO mV AC DC LIMIT Ω x1Mk op12f.eps Figure 1-12.
Page 47 Preparation for Use Controls and Indicators Table 1-3. Front Panel Keys Description Description Calls up the menu to set the function for the channel Calls up the menu to set alarm limits for the channel. Calls up the menu to set scaling on the channel. Used to exit any setup menu and return to Inactive Mode, without saving settings you’ve selected thus far.
Page 48 2635A Users Manual Table 1-3. Front Panel Keys Description (cont.) Description CLEAR This key sequence clears the entire contents of the Review array. Review data must be presently shown on the display to clear the array. LOCAL When under remote control without lockout (REMS), this returns control to the front panel.
Page 49 Preparation for Use Controls and Indicators Table 1-4. Annunciator Descriptions (cont) Annunciator Description (mega) a multiplier for the displayed value, e.g., M½ for megohms. Also used when defining alarm and Mx+B values. Lit when the ice point resistance is being defined for RTD measurements on the displayed channel.
Page 50 2635A Users Manual 1-24...
Page 51: Front Panel Operations
Chapter 2 Front Panel Operations Title Page Summary of Front Panel Operations ..............2-5 Configuring the Instrument for Operation............2-6 Turning the Power on..................2-6 Selecting a Channel..................2-8 Configuring a Measurement Channel..............2-8 Configuring a Channel to Measure DC Volts..........2-9 Configuring a Channel to Measure AC Volts..........
Page 52 2635A Users Manual Memory Card Formatting ................. 2-26 Memory Card Capacity................2-26 Memory Card Files ................... 2-26 Memory Card Exchange During Scanning..........2-26 Memory Card Data Extraction..............2-27 Memory Card Error Messages ..............2-28 Using the Monitor Mode................2-29 Using the Review Mode................2-30 Additional Features ...................
Page 53 Front Panel Operations Summary of Front Panel Operations...
Page 54 2635A Users Manual HYDRA DATA BUCKET REVIEW LAST mVDCAC INTVL FILES REVIEW FUNC ALRM SCAN 300V CLOCK MODE CLEAR RATE SINGLE Mx+B ENTER CANCEL SHIFT LIST TOTAL LOCAL COMM ZERO TRIGS BUSY BATT op92f.eps...
Page 55: Summary Of Front Panel Operations
Front Panel Operations Summary of Front Panel Operations Summary of Front Panel Operations Descriptions of all equipment operations start at the front panel and proceed through the following topics, which appear in the following sequence: • Preparing for Operation • Configuring a Measurement Channel •...
Page 56: Configuring The Instrument For Operation
2635A Users Manual Configuring the Instrument for Operation To prepare the equipment for front panel operations, perform the two following procedures: • Turning the Power On (Figure 2-2) • Selecting a Channel (Figure 2-3) Turning the Power on There are four power-on options. Figure 2-2 describes the control sequences for each option.
Page 57 Front Panel Operations Configuring the Instrument for Operation Table 2-1. Configuration Reset (Default) Settings Parameter Default Setting Channels 0 to 20 Measurement Rate Slow Mx+B Scaling 1x+0 (all channels) Scan Interval 0:00:00 (continuous) Review Values Cleared (all channels) Digital I/O Lines Set High (non-alarm) Totalizer 0/Debounce Disabled...
Page 58: Selecting A Channel
2635A Users Manual Selecting a Channel There are 21 channels, 0 to 20. A channel is selected for configuration or configuration verification when the instrument is in the inactive mode. An active channel is selected for monitoring when the instrument is in the Monitor Mode (see Figure 2-17) or Review Mode (see Figure 2-18).
Page 59: Configuring A Channel To Measure Dc Volts
Front Panel Operations Configuring a Measurement Channel • Configuring a Channel to Measure Temperature (Thermocouples) (Figure 2-8) • Configuring a Channel to Measure Temperature (RTDs) (Figure 2-9) • Configuring a Channel Off (Figure 2-10) The instrument is protected from channel configuration errors. For example, accidentally applying 300V ac to a channel configured for resistance will not damage the instrument.
Page 60: Configuring A Channel To Measure Ac Volts
2635A Users Manual Configuring a Channel to Measure AC Volts Perform the procedure in Figure 2-5 to configure a channel for measuring ac volts. In preparation, the instrument must be in the inactive mode (not scanning or monitoring) and the desired channel must be selected (see Figure 2-3). To exit at any time (changes not saved), press the C key.
Page 61: Configuring A Channel To Measure Resistance
Front Panel Operations Configuring a Measurement Channel Configuring a Channel to Measure Resistance Perform the procedure in Figure 2-6 to configure a channel for measuring resistance. In preparation, the instrument must be in the inactive mode (not scanning or monitoring) and the desired channel must be selected (see Figure 2-3).
Page 62: Configuring A Channel To Measure Frequency
2635A Users Manual Configuring a Channel to Measure Frequency Perform the procedure in Figure 2-7 to configure a channel for measuring frequency. In preparation, the instrument must be in the inactive mode (not scanning or monitoring) and the desired channel must be selected (see Figure 2-3). To exit at any time (changes not saved), press the C key.
Page 63: Configuring A Channel To Measure Temperature
Front Panel Operations Configuring a Measurement Channel Configuring a Channel to Measure Temperature Perform the procedure in Figure 2-8 to configure a channel for measuring temperature with thermocouples, or Figure 2-9 to measure temperature with resistance-temperature detectors (RTDs). In preparation, the instrument must be in the inactive mode (not scanning or monitoring) and the desired channel must be selected (see Figure 2-3).
Page 64 2635A Users Manual Table 2-3. Thermocouple Ranges Positive Lead Negative Lead Usable (H) Color Material Range (°C) Type Material ANSI* IEC** Iron White Black Constantan -200 to 760 C*** Tungsten (5% Rhenium) White Tungsten (26% Rhenium) 0 to 2316 Platinum (30% Rhodium) Gray Platinum (6% Rhodium) 0 to 1820...
Page 65 Front Panel Operations Configuring a Measurement Channel Selecting the Temperature Mode. Press the SET FUNC FUNC FUNC key to access the SET FUNC (Set Function) menu. Press the up/down arrow keys until °C (Centigrade) or °F (Fahrenheit) is °F [°C]* displayed, then press the ENTER key.
Page 66: Configuring A Channel Off
2635A Users Manual Configuring a Channel Off Perform the procedure in Figure 2-10 to configure a channel for off (no measurement). In preparation, the instrument must be in the inactive mode (not scanning or monitoring) and the desired channel must be selected (see Figure 2-3). To exit at any time (changes not saved), press the C key.
Page 67: Setting The Scan Interval
Front Panel Operations Setting Operating Conditions Setting the Scan Interval Perform the procedure in Figure 2-11 to set the time between starts of measurement scans. In preparation, the instrument must be in the inactive mode (not scanning or monitoring). To exit at any time (changes not saved), press the C key. The scanning interval format is HOURS:MINUTES:SECONDS.
Page 68: Setting The Measurement Rate
2635A Users Manual Setting the Measurement Rate Perform the procedure in Figure 2-12 to set a fast or slow [default] measurement rate. The measurement rate affects the time required to scan the configured channels. However, the fast mode sacrifices one digit of measurement resolution. For example, a temperature reading of 22.4ºC in the slow mode would become 22ºC in the fast mode, or 27.858V dc in the slow mode would become 27.86 V dc in the fast mode.
Page 69: Alarm Indications While Monitoring
Front Panel Operations Setting Operating Conditions Alarm Indications While Monitoring If the channel being monitored is in an alarm condition, the alarm limit 1 and/or 2 annunciators will be turned on, and the ALARM annunciator blinks bright/dim. The alarm limit annunciator indicates which alarm has been exceeded. If the monitored channel is not in alarm, the ALARM annunciator will be off, unless scanning and some other channel is in alarm, then the ALARM indicator has a steady dim display.
Page 70: Alarms And Autoprinting
2635A Users Manual Table 2-4. TLL Alarm Outputs (Channels 0 to 3) Channel 3 Channel 2 Channel 1 Channel 0 Decimal 0 (Alarm) 0 (Alarm) 0 (Alarm) 0 (Alarm) 1 (No Alarm) 1 (No Alarm) 1 (No Alarm) 1(No Alarm) 1 = No Alarm 0 = Alarm Note 1.
Page 71 Front Panel Operations Setting Operating Conditions Table 2-5. TTL Alarm Outputs (Channels 4 to 20) Channels Channels Channels Channels 7 -or- 6 -or- 5 -or- 4 -or- 11 -or- 10 -or- 9 -or- 8 -or- 15 -or- 14 -or- 13 -or- 12 -or- 16 -or- 20 -or-...
Page 72 2635A Users Manual ALRM Selecting Alarm 1 or Alarm 2. Press the ALRM LIMIT (Alarm) key to access the alarm selection menu. Use the up/down arrow keys to select alarm 1 or 2, then press the ENTER key. ENTER Selecting the Alarm Mode. Press the up/down LIMIT arrow keys to select an alarm mode, OFF (Off), HI (High), or LO (Low), then press the ENTER key.
Page 73: Setting The Mx+B Scaling
Front Panel Operations Setting Operating Conditions Setting the Mx+B Scaling Perform the procedure in Figure 2-14 to set the Mx+B scaling for any configured channel. In preparation, the instrument must be in the inactive mode (not scanning or monitoring) and the desired channel must be configured with a measurement function (see Figures 2-4 to 2-9) and selected (see Figure 2-3).
Page 74 2635A Users Manual Mx+B Selecting the M Numerical Value. Press the SET Mx+B Mx+B key to access the Mx+B menu. Press the ± 0 0 0 0 0 up/down and left/right arrow keys to enter a five - to - digit number that defines the numerical value for ±...
Page 75 Front Panel Operations Setting Operating Conditions (Continued from the previous page) Selecting the B Numerical Value. Press the SET Mx+B up/down and left/right arrow keys to enter a five ± 0 0 0 0 0 digit number that defines the numerical value for - to - the measurement offset, ignoring the decimal ±...
Page 76: Operating Modes
2635A Users Manual Operating Modes With the channels configured and operating conditions set, the instrument is ready for operation in one of the following modes: • Using the Scan Mode (Figure 2-15) • Using the Monitor Mode (Figure 2-17) • Using the Review Mode (Figure 2-18) Each operating mode is discussed below.
Page 77: Memory Card Data Extraction
Front Panel Operations Operating Modes 3/bAd is displayed (see Figure 2-16). Err4/bAd indicates the internal memory is full, saving only the most recent 75 scans. The new card is updated with the scans in memory. Memory Card Data Extraction Measurement data recorded onto a memory card can be read only by a PC running Starter or Logger applications software.
Page 78: Memory Card Error Messages
2635A Users Manual Memory Card Error Messages Any illegal memory card operation results in a double "beep" and an error display as shown in Figure 2-16. If the instrument is scanning and in the Monitor Mode or Review Mode, only the double beep will be heard for a memory card error. Error messages are acknowledged by pressing the E or key or by ejecting the memory card.
Page 79: Using The Monitor Mode
Front Panel Operations Operating Modes Using the Monitor Mode Perform the procedure in Figure 2-17 to start and stop the Monitor Mode of operation. The Monitor Mode can be started when the instrument is in the inactive mode or in the Scan Mode.
Page 80: Using The Review Mode
2635A Users Manual Using the Review Mode Perform the procedure in Figure 2-18 to operate the Review Mode of operation. The Review Mode is used any time during or after operation of the Scan Mode. While the instrument is in the Scan Mode, the last, maximum, and measurements for each scanned channel are stored in memory and updated with each scan, forming the Review Array.
Page 81: Additional Features
Front Panel Operations Additional Features Additional Features The following additional features allow the instrument to serve in a variety of applications: • Scan Triggering Options (Figure 2-19) • Totalizer Operation (Figure 2-20) • Digital Input/Output Lines • Setting Date and Time (Figure 2-21) •...
Page 82: Totalizer Operation
2635A Users Manual SHIFT Selecting a Trigger Option. Press the SHIFT TRIg key and then the MON key to access the trigger ALAr option menu. Press the up/down arrow keys to select either ALAr (Alarm) (Monitor-Alarm trigger), On (On) (External trigger), or OFF (Off) (no trigger option selected), then press the ENTER key.
Page 83: Digital Input/Output Lines
Front Panel Operations Additional Features Reading the Totalizer Count. Press the TOTAL totAL key to view the contents of the totalizer counter. The maximum count is 65535. If the maximum XXXXX TOTAL count is exceeded, the display will show OL (Overload).
Page 84: Setting Date And Time
2635A Users Manual Setting Date and Time Perform the procedure in Figure 2-21 to set the instrument internal clock and calendar, which must be correct since measurements are tagged with this time and date. The built- in clock accuracy is a nominal one minute per month. Once set to the correct date and time, clock and calendar operation is automatic and no further action is required.
Page 85: Reading Instrument Software Versions
Front Panel Operations Additional Features Reading Instrument Software Versions Perform the procedure in Figure 2-22 to view the version of the internal software that is controlling the instrument’s operation. Two software versions are identified with this procedure: the main software that operates all instrument functions, and the analog-to- digital software that operates the instrument analog-to-digital converter.
Page 86: Front Panel Key Lockout Options
2635A Users Manual Front Panel Key Lockout Options Perform the procedure in Figure 2-24 to lockout the front panel key functions. There are three lockout features: • Monitor Mode Lockout • Review Mode Lockout A third lockout can be enabled only from the computer interface (see the LOCK 3 command in Chapter 4).
Page 87: Rs-232 Computer Interface
Front Panel Operations Instrument Interfaces RS-232 Computer Interface The Computer Interface is described in detail in Chapter 4, "Computer Operations." Using the RS-232 Computer Interface With a Printer The Printer Interface is described in detail in Chapter 5, "Printer Operations." Using the RS-232 Computer Interface With a Modem The Modem Interface is described in detail in Chapter 6, "Modem Operations."...
Page 88 2635A Users Manual 2-38...
Page 89: Memory Card Operations
Chapter 3 Memory Card Operations Title Page Summary of Memory Card Operations ............. 3-3 Memory Card Files ..................3-3 Setup Files..................... 3-4 Data Files ...................... 3-4 Memory Card Capacity ................. 3-4 Memory Card Battery ................... 3-5 Inserting and Removing the Memory Card ............3-5 Inserting a Memory Card ................
Page 90 2635A Users Manual REVIE W LAST mVDCA C k Hz 300V BUSY BATT op81f.eps...
Page 91: Summary Of Memory Card Operations
(see Appendix A, "Specifications"). SRAM memory cards are readily available from supply houses serving the computer industry, or from Fluke (see Table 1- 2, "Options and Accessories").
Page 92: Setup Files
2635A Users Manual Setup Files When the front panel controls have been used to configure channels for a particular instrument application, including type of measurement, alarms, scaling, rate, and all other operating parameters, this configuration can be saved as a SEtxx files. If this is the first setup file saved on the memory card, the instrument will assign 00 for the file name SEt00, or you can select your own file number.
Page 93: Memory Card Battery
Memory Card Operations Inserting and Removing the Memory Card Memory Card Battery A typical SRAM is powered by an internal lithium 3-volt battery that has a minimum life of five years for a 256K-byte card, and two years for a 1M-byte card. If the battery voltage falls below 2.75 volts, the front panel BATT indicator will light (see Figure 1-1).
Page 94 2635A Users Manual Table 3-1. Memory Card Error Codes Error Probable Cause Err 1 Card CARD ERROR- Unable to use a card (Note 1): Card is missing or card is not fully inserted. Install a memory card (Fig. 3-1). Card is unformatted. Initialize a memory card (Fig.
Page 95: Initializing A Memory Card
Memory Card Operations Initializing a Memory Card Initializing a Memory Card Perform the procedure in Figure 3-3 to initialize (format) a memory card. Memory cards can also be formatted at a PC if it is equipped with a memory card reader. (Formatting at a PC uses the format utility supplied with the memory card reader.)When the memory card is formatted, a standard DOS file system and directory are put into the memory on the card.
Page 96: Recording Measurement Results During Scanning
2635A Users Manual Recording Measurement Results During Scanning Perform the procedure in Figure 3-4 to record measurement results onto the memory card. The destination for the scanned data can be the memory card, printer, both the memory card and printer, or no destination, where the results are not saved, except in the Review array (last, maximum, and minimum scanned values) and in the 100-scan internal memory FIFO (First In First Out) log queue.
Page 97: Setup File Procedures
Memory Card Operations Setup File Procedures Setup File Procedures Perform the following procedures to LOAD, STORE, and ERASE memory card instrument configuration (SEtUP) files. Using Setup Store Perform the procedure in Figure 3-5 to save the current instrument configuration. The communication parameters: baud, parity, CTS, and echo, remain as set previously by the front panel controls or computer interface.
Page 98: Using Setup Load
2635A Users Manual Using Setup Load Perform the procedure in Figure 3-6 to discard the current instrument configuration and load a configuration saved in a previous SETUP STORE operation (Figure 3-5). A configuration file includes channel configurations, scan interval, measurement rate, alarms, Mx+B scaling, and temperature unit (ºC or ºF).
Page 99: Using Setup Erase
Memory Card Operations Setup File Procedures Using Setup Erase Perform the procedure in Figure 3-7 to remove a setup file from the memory card. Removing a file does not interrupt the sequential SEtxx file names assigned with the SEtUP STORE command. When SEt99 is reached, the instrument loops back to reuse previously assigned file names that have been erased or skipped over.
Page 100: Data File Procedures
2635A Users Manual Data File Procedures Perform the following procedures to OPEN, LOAD, STORE, and ERASE memory card instrument data (DATA) files. Using Data Open Perform the procedure in Figure 3-8 to open a data file in preparation for recording measurement data to the memory card.
Page 101: Using Data Erase
Memory Card Operations Data File Procedures Using Data Erase Perform the procedure in Figure 3-9 to remove a data file from the memory card. Removing a file does not interrupt the sequential dAtxx file names assigned with the DATA OPEN command. When dAt99 is reached, the instrument will loop back and reuse previously assigned file names that have been erased or skipped over.
Page 102: Setup And Data Files Directory
2635A Users Manual Setup and Data Files Directory Perform the procedure in Figure 3-10 to obtain a directory of existing SEtxx files and dAtxx files that exist on the memory card, plus the remaining capacity of the card. The size of the selected file is given in the front panel display in K-bytes. To exit at any time (directory not completed), press the C key.
Page 103: Setup And Data File Current Status
Memory Card Operations Setup and Data File Current Status Setup and Data File Current Status Perform the procedure in Figure 3-11 to display the status of the memory card SEtxx and dAtxx files that are currently in effect or were in effect for the most recent scan. The xx portion of the file name represents a file identification number from 00 to 99.
Page 104: Memory Card File Operations To And From A Pc
2635A Users Manual Memory Card File Operations to and from a PC All memory card file transfers to and from the instrument are controlled at the PC. Nothing is required at the instrument end, except to have the RS-232 link operating correctly (see Chapter4, "Computer Operations") and having the desired memory card installed in the instrument front panel.
Page 105: Computer Operations
Chapter 4 Computer Operations Title Page Summary of Computer Operations..............4-3 Connecting the Instrument to a PC..............4-3 Configuring the Instrument for Computer Operations ........4-5 Configuring the PC for Computer Operations ..........4-6 Testing the Instrument/PC RS-232 Interface ............ 4-6 Testing the RS-232 Interface Using Terminal Emulation (Windows) ..
Page 106 2635A Users Manual REVIE W LAST mVDCA C k Hz 300V BUSY BATT op82f.eps...
Page 107: Summary Of Computer Operations
Figure 4-1. The instrument RS-232 port (DB-9 connector) is cabled to a PC serial COM port that uses either a DB-9 connector or DB-25 connector. The connecting cable can be fabricated (see Appendix D) or ordered from Fluke as an option (see Chapter 1).
Page 108 2635A Users Manual PC CONNECTION WITH DB-9 CONNECTOR HYDRA RS-232 COM PORT (DB-9) (DB-9) FLUKE R543 CABLE (MALE) (MALE) (OR EQUAL) PC CONNECTION WITH DB-25 CONNECTOR HYDRA RS-232 FLUKE RS40 CABLE COM PORT (DB-9) (OR EQUAL) (DB-25) (MALE) (MALE) op48f.eps...
Page 109: Configuring The Instrument For Computer Operations
Computer Operations Configuring the Instrument for Computer Operations Configuring the Instrument for Computer Operations Correct operation of the interface between the instrument and PC depends on the baud rate, parity, CTS (Clear To Send) and echo of the RS-232 interface parameters. Perform the procedure in Figure 4-2 to establish these parameters for the instrument.
Page 110: Configuring The Pc For Computer Operations
(baud rate, parity, etc.). If everything seems normal, but characters still don’t appear, check the RS-232 connection cable (see Appendix D). When the RS-232 link is operating correctly, the instrument returns an identification string and execution prompt similar to the following: FLUKE,2635A,0,Mn.n An.n Dn.n Ln.n =>...
Page 111: Testing The Rs-232 Interface Using Terminal Emulation (Generic)
Computer Operations Testing the Instrument/PC RS-232 Interface Mn.n identifies the main software version. An.n identifies the analog-to-digital converter software version. Dn.n identifies the display software version. Ln.n identifies the programmable gate-array configuration version. 6. Other commands can be entered from the PC to gain familiarity with the instrument command set.
Page 112 RS-232 connection cable (see Appendix D). When the RS-232 link is operating correctly, the instrument returns an identification string and execution prompt similar to the following: FLUKE,2635A,0,Mn.n An.n Dn.n Ln.n => Mn.n identifies the main software version.
Page 113: Testing The Rs-232 Interface Using Gwbasic
OPEN "COM1,9600,N,8,1,CS,CD" FOR RANDOM AS #1 PRINT #1, "*IDN?" PRINT INPUT$ (46, #1) IDN? FLUKE,2635A,0,Mn.n An.n Dn.n Ln.n => Mn.n identifies the main software version. An.n identifies the analog-to-digital converter software version. Dn.n identifies the display software version. Ln.n identifies the programmable gate-array configuration version.
Page 114: Testing The Rs-232 Interface Using Qbasic
2635A Users Manual One of the following three possible prompts are returned when a command is sent to the instrument: => The command was executed [Example, PRINT 1]. !> The command was recognized, but not executed [Example, PRINT 3, where only PRINT 0 and PRINT 1 are legal entries]. ?>...
Page 115 4. Enter SHIFT<F5> to run the program entered in step 3.If the RS-232 interface is operating correctly, the instrument returns an identification string and execution prompt similar to the following: *IDN? FLUKE,2635A,0,Mn.n An.n Dn.n Ln.n => Mn.n identifies the main software version. An.n identifies the analog-to-digital converter software version.
Page 116: Computer Interface Commands And Operation
2635A Users Manual PRINT #1, "*RST;FUNC 0,VDC,4;PRINT_TYPE 0,0;PRINT 1;*TRG":PRINT INPUT$(124, #1) If other commands are entered, remember that the input character count xxx for PRINT INPUT$(xxx, #1) command must be exact. A number too small will not read all the characters and will leave residual characters in the buffer, while a number too big will "hang up"...
Page 117: Input String Examples
Computer Operations Computer Interface Commands and Operation instances, a terminator is automatically transmitted by the host at the end of the command string, for example, commands entered in BASIC. Input String Examples Below are four input string examples. Example 1 - Select function for channel 1 as ohms, 30-k range, 2-wire connection.
Page 118: Status Registers
2635A Users Manual Positive overload (OL on display) returns +001.00E+9 Negative overload (-OL on display) returns -001.00E+9 Open thermocouple (otc on display) returns +009.00E+9 Status Registers Internal instrument operation is summarized in three data registers, which can be accessed to determine various events and status conditions before, during, and after instrument operation.
Page 119 Computer Operations Computer Interface Commands and Operation Standard Instrument Event Status Event Register Register Read Using ESR? Read Using IER? (Read Erases (Read Erases Contents) & & Contents) & & & & & & & & & & & & &...
Page 120: Standard Event Status Register (Esr)
2635A Users Manual For example, an IER byte of binary 10000000 (decimal 128) indicates Scan Complete. If the IEE register is set to binary 10000000 (using the command IEE 128), then a Scan Complete condition will cause the Logical OR gate to output a logic high. In a similar manner, parameters can be combined.
Page 121: Status Byte Register (Stb)
Computer Operations Computer Interface Commands and Operation associated Logical OR gate will output a logic high to the Event Status Bit (ESB) in the Status Byte Register. For example, an ESR byte of binary 00010000 (decimal 16) indicates an Execution Error.
Page 122: Computer Interface Command Set
2635A Users Manual For example, an STB byte of binary 00100000 (decimal 32) indicates an Event Status Bit. If the SRE register is set to binary 00100000 (using the command *SRE 32), then an Event Status Bit will cause the Logical OR gate to output a logic high, which automatically sets bit 6 to high via the MSS input.
Page 123 Computer Operations Computer Interface Commands and Operation Table 4-4. Command and Query Summary Alarms ALARMS? Active Alarms Query ALARM_ASSOC Associate Alarm Output ALARM_ASSOC? Alarm Association Query ALARM_ASSOC_CLR Clear Alarm Association ALARM_DO_LEVEL Set Alarm Output Level ALARM_DO_LEVELS? Alarm Output State Query ALARM_LIMIT Set Alarm Limit ALARM_LIMIT?
Page 124 2635A Users Manual Table 4-4 Command and Query Summary (cont) Measurement Rate RATE Select Measurement Rate RATE? Measurement Rate Query Measurement Values LAST? Channel’s Last Scan Value MAX? Channel’s Maximum Value MIN? Channel’s Minimum Value NEXT? Next Scan’s Values Memory Card Memory Card Files Directory FILE_ERROR? File Error Query...
Page 125 Computer Operations Computer Interface Commands and Operation Table 4-4 Command and Query Summary (cont) Remote/Local LOCK Lock/unlock front panel control keys LOCK? Returns instrument front panel lock status LOCS Local without Lockout LWLS Local with Lockout REMS Remote without Lockout RWLS Remote with Lockout Reset...
Page 126 2635A Users Manual Table 4-4 Command and Query Summary (cont) Test/Identification *IDN? Identification Query *TST? Selftest Query Time/Date DATE Set Instrument Date TIME Set the instrument Time TIME_DATE? Retrieve Time and Date Totalizer TOTAL Set Totalizer Count TOTAL? Totalizer Value Query TOTAL_DBNC Set Totalizing Debounce TOTAL_DBNC?
Page 127 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference <CNTL><C> Abort Command Stops execution of command *CLS Clear Status Clears all event registers (ESR, (IER) summarized in the status byte. *ESE Event Status Enable Sets the Event Status Enable Register to the given value. *ESE <value>...
Page 128 This query must be the last query on the input line, otherwise a query error is generated. It is legal to follow this query with other commands. Example: *IDN? returns FLUKE, 2635A, 0, M6.E A4.7 D1.L1.6 {Fluke product 2645A is running the main software version M6.2, Analog-to- Digital Converter software version A4.7, display software version D1.0,...
Page 129 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) *STB? Read Status Byte Query Returns the integer value of the Status Byte, with bit 6 as the master summary bit. See the previous discussion on status registers for more information.
Page 130 2635A Users Manual Table 4-5. Command and Query Reference (cont) ALARMS? Active Alarms Query Returns alarm status for a single scanned channel, or alarm status for all scanned channels. ALARMS? <channel> <channel> = (0 .. 20) or leave blank The values returned represents data from the most recent scan, whether scanning is active or note.
Page 131 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) ALARM_ASSOC Associate Alarm Output Configures alarm output associations at the rear panel DIGITAL I/O connector for channels 4 to 20. ALARM_ASSOC <channel>,<limit_num>,<DO_line> <channel> = (4 .. 20) <limit_num>...
Page 132 2635A Users Manual Table 4-5. Command and Query Reference (cont) ALARM_ASSOC? Alarm Association Query Returns alarm output associations at the rear panel DIGITAL I/O connector for channels 4 to 20. ALARM_ASSOC? <channel>,<limit_num> <channel> = (4 .. 20) <limit_num> = 1 or 2 This command returns an integer that represents the DIGITAL I/O line active at the rear panel DIGITAL I/O connector for the specified channel and alarm limit.
Page 133 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) ALARM_DO_LEVEL Alarm Digital Output Level Configures rear panel ALARM OUTPUTS lines for I/O functions. ALARM_DO_LEVEL <DO_line>,<DO_state> <DO_line> = (0 .. 3) <DO_state> = 1 (high) 0 (low) The rear panel ALARM OUTPUTS lines 0 to 3 are hard-wired to output alarm conditions for channels 0 to 3, respectively.
Page 134 2635A Users Manual Table 4-5. Command and Query Reference (cont) ALARM_LIMIT Alarm Limit Set alarm limit 1 or 2 for any channel 0 to 20. ALARM_LIMIT <channel>,<limit_num>,<sense>,<value> <channel> = (0 .. 20) <limit_num> = 1 2 <sense> = HI LO OFF <value>...
Page 135 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) DIO_LEVELS? Digital I/O State Query Returns an integer between 0 and 255 that summarizes the logical state of the rear panel DIGITAL I/O lines 0 to 7. A logical 0 (low) means the line is asserted. Since the lines can be used as alarm outputs of digital inputs or outputs, the return represents the actual conditions at time of query.
Page 136 2635A Users Manual Table 4-5. Command and Query Reference (cont) Enable/Disable RS-232 Echo Mode ECHO ECHO <1 0> 1 = Turn RS-232 echoing on. 0 = Turn RS-232 echoing off. The echo on mode allows character strings sent from the host to the instrument, to return (echo) back to the host.
Page 137 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) FILE_OPEN Data File Open Opens a data file for measurement logging. FILE_OPEN <file> <file> = DAT00.HYD, DAT01.HYD, DAT99.HYD All scans are appended to this file until a file close is performed. The special name ’*’...
Page 138 2635A Users Manual Table 4-5. Command and Query Reference (cont) FILE_RX File Receive The normal serial protocol is suspended and a binary transfer (XMODEM) is started between the instrument memory card and the host computer. Received data is typically an instrument configuration file transmitted from the host computer and uses the naming convention, SETxx.HYD.
Page 139 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) FILE_TAG? Configuration File Tag Return the tag from the given configuration or data file (<file> specified), or the present configuration tag (no <file> specified). FILE_TAG? <file> <file>= DAT00.HYD, DAT01.HYD, ...
Page 140 2635A Users Manual Table 4-5. Command and Query Reference (cont) FORMAT Response Format Set the output format type to include or exclude measurement units. FORMAT 1 Measurements returned without units. FORMAT 2 Measurements returned with units. Commands that return measurement data (like LAST?, NEXT?, MIN?, MAX?) can be expressed as a number only (FORMAT 1) or as a number with a measurement unit (FORMAT 2).
Page 141 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) FUNC Channel Function Definition Define the Changing a channel configuration automatically erases values held in review, and resets all ALARM OUTPUTS and DIGITAL I/O lines to logical high. The FUNC command clears any alarm limits and scaling values for this channel;...
Page 142 2635A Users Manual Table 4-5. Command and Query Reference (cont) FUNC? Channel Function Query Return the complete function for the indicated channel. FUNC? <channel> <channel> = (0 .. 20) The returns are in comma-separated data fields using the following format: <function>,<range>,<terminals>...
Page 143 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) INTVL Set Scan Interval Set scan interval time. INTVL <hours>,<minutes>,<seconds> <hours> = (0 .. 9) <minutes> = (0 .. 99) <seconds> = (0 .. 99) An Execution Error is generated if values outside the specified ranges are used or if the instrument is scanning.
Page 144 2635A Users Manual Table 4-5. Command and Query Reference (cont) LOCK Lock and unlock the instrument front panel control keys. The LOCK modes disable the front panel keys, while placing the instrument in either REVIEW (LOCK 1), MONITOR (LOCK 2) or Configuration Lock (LOCK 3). This limits instrument operation to a specific mode and prevents unauthorized configuration changes.
Page 145 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) LOCK? Returns the instrument front panel lock status, as selected with the LOCK command. Front panel keys are unlocked. All key functions are enabled. Front panel keys are locked, except for up/down and left/right arrow keys, which are used to review the minimum, maximum and last values of any channel Front panel keys are unlocked, except for the up/down arrow keys,...
Page 146 2635A Users Manual Table 4-5. Command and Query Reference (cont) LOG_BIN? Binary Upload of Logged Data Returns a single ASCII string, which encodes the raw binary data stored at the specified <index> position. LOG_BIN? <index> <index> = 1, 2, 3, ... 100 See Appendix C for a discussion of the LOG_BIN? command.
Page 147 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) MAX? Channel’s Maximum Value Returns the maximum value(s) measured since the review array was last cleared. Channel’s Maximum Value MAX? <channel> <channel> = 0, 1, 2, ...20, or leave blank Returns maximum measurement values for either the indicated channel, or for all defined channels if the <channel>...
Page 148 2635A Users Manual Table 4-5. Command and Query Reference (cont) MCARD_DIR? Memory Card Directory Returns a terminated string for each file in the root directory of the memory card. The string is a comma-separated list of the file’s name, size, modification date (day, month, year) and time (hours, minutes, seconds).
Page 149 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) Enable/Disable Monitoring This command performs the same function as on the front panel. <channel> <channel> = 0, 1, 2 ... 20 Disables monitoring The <channel> parameter can be 0 through 20. A command error is generated if no <channel>...
Page 150 2635A Users Manual Table 4-5. Command and Query Reference (cont) NEXT? Next Scan’s Values The NEXT? query returns data values for the next scan to complete. If a scan is in progress when the NEXT? query is processed, the data values returned are from the scan in progress.
Page 151 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) PRINT? Data Logging Query Returns the status of data logging, as selected with the PRINT command. PRINT 0 is selected (data logging disabled) PRINT 1 is selected (data logging enabled PRINT_TYPE Set Data Logging Type Set the destination and condition for data logging.
Page 152 2635A Users Manual Table 4-5. Command and Query Reference (cont) PRINT_TYPE? Data Logging Type Query Returns the status of data logging destination and condition, as selected with the PRINT_TYPE command. Returns two integers in the form <destination<,<type> as follows: <destination> = 0, 1, 2, ... 6 0 = Log data to printer 1 = Log data to internal memory 2 = Log data to internal memory and printer...
Page 153 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) RATE Select Measurement Rate Specifies the measurement rate. Changing the measurement rate also clears the Review array, and ALARM OUTPUTS and DIGITAL I/O lines. RATE 0 Selects the slow measurement rate.
Page 154 2635A Users Manual Table 4-5. Command and Query Reference (cont) RTD_R0? RTD Ice-Point (R0) Query Returns the RTD R0 (ice-point resistance) value for the indicated channel. (The 0 portion of R0 in the RTD_R0 command is the number zero.) RTD_R0? <channel>...
Page 155 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) SCALE_MB Set Mx+B Scaling Values Set the M and B scaling values for the indicated channel, and display the results of the Mx+B calculation in the indicated display range. Changing the Mx+B of any channel also clears the Review array, and resets ALARM OUTPUTS and DIGITAL I/O lines.
Page 156 2635A Users Manual Table 4-5. Command and Query Reference (cont) SCALE_MB? Mx+B Scaling Values Query Return the M and B scaling values for the indicated channel. SCALE_MB? <channel> <channel> = 0, ... 20 This command returns three values. The first two are the M and B values for the channel indicated, even when M=1 and B=0 or the channel function is defined as OFF.
Page 157 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) SCAN? Scan Query Returns the scanning status, as selected with the SCAN command. Scanning is disabled Scanning is enabled If a scan is in progress, a "1" is returned at the end of the scan. (A response delay may occur if SCAN? is sent early in a scan.) This feature allows synchronization for other commands that would not be recognized if received during a scan.
Page 158 2635A Users Manual Table 4-5. Command and Query Reference (cont) TEMP_CONFIG? Temperature Configuration Query Returns the status of the temperature configuration, as selected with the TEMP_CONFIG command. Returns an integer 0, 1, 2, or 3, which corresponds to the temperature configuration, as shown in the table below. Value Meaning OTC Disable and °C...
Page 159 Computer Operations Computer Interface Commands and Operation Table 4-5. Command and Query Reference (cont) TOTAL? Totalizer Value Query Returns the value of the present Totalizer count. Format of the value is +00.000E+3. When the Totalizer has overflowed, the value returned is +001.00E+9. Example: TOTAL? returns 13.465E+3 [The present value of the totalizer count is 13,465.] TOTAL_DBNC...
Page 160 2635A Users Manual Table 4-5. Command and Query Reference (cont) TRIGGER? Trigger Type Query Returns an integer representing the present trigger type: External trigger and Alarm trigger disabled External trigger enabled Alarm trigger enabled *TST? Self Test Query (See front of table.) *WAI Wait-to-continue (see front of table)
Page 161 Computer Operations Computer Interface Commands and Operation ' HYDRALOG.BAS Hydra Program to scan VDC, VAC, OHMS, FREQ or TEMP - initializes RS-232 Communications between PC and Hydra - configures a number of Hydra channels for one type of measurement (e.g., VDC, VAC, temperature, etc.) - scan channels 3 times, and display and record measurement data in file "TESTDATA.PRN"...
Page 162 2635A Users Manual 620 ' ' Set up the common channel configuration string (function and range) IF (FUNC$ = "1") THEN CONFIG$ = "VDC, 1" IF (FUNC$ = "2") THEN CONFIG$ = "VAC, 1" IF (FUNC$ = "3") THEN CONFIG$ = "OHMS, 1, 2" ' Assuming 2-terminal channel IF (FUNC$ = "4") THEN CONFIG$ = "FREQ, 1"...
Page 163 Computer Operations Computer Interface Commands and Operation ' HYDRALOG.BAS Hydra Program to scan VDC, VAC, OHMS, FREQ or TEMP - initializes RS-232 Communications between PC and Hydra - configures a number of Hydra channels for one type of measurement (e.g., VDC, VAC, temperature, etc.) - scan channels 3 times, and display and record measurement data in file "TESTDATA.PRN"...
Page 164 2635A Users Manual 'Configure Hydra Channels First, initialize screen and display Hydra identification info LOCATE 1, 25: PRINT "Sample Program for Hydra" PRINT #1, "*IDN?": GOSUB CheckResponse: LINE INPUT #1, Result$ LOCATE 2, 20: PRINT Result$ WHILE (1) 'Print banner line at bottom of screen LOCATE 25, 1 PRINT "1 = VDC 2 = VAC...
Page 165 Computer Operations Computer Interface Commands and Operation CheckResponse: ' CHECKRESPONSE Subroutine ' This subroutine checks the Hydra prompt after sending a command to Hydra, to see if an error occurred ' The possible responses are: "=>(CR)(LF)" (command successful) "?>(CR)(LF)" (command syntax error) "!>(CR)(LF)"...
Page 166 2635A Users Manual * HYDRALOG.C Hydra Program to scan VDC, VAC, OHMS, FREQ or TEMP - initializes RS-232 Communications between PC and Hydra - configures a number of Hydra channels for one type of measurement (e.g., VDC, VAC, temperature, etc.) - scan channels 3 times, and display and record measurement data on the screen and in file "testdata.prn"...
Page 167 Computer Operations Computer Interface Commands and Operation asiputs( COM2, "ECHO 0", -2); /* Turn off command echo on Hydra */ checkResponse(); /* Get prompt */ /* Open data file TESTDATA.PRN */ if((testdata = fopen("testdata.prn","w")) == NULL) perror("Cannot open testdata.prn"); exit(1); /* Find out the number of channels the user wants to configure NOTE: Channel 0 will not be used */ numChannels = 0;...
Page 168 2635A Users Manual /* Request channel configuration from user */ fprintf(stdout,"1 = VDC\t\t2 = FAC\t\t3 = OHMS\t4 = FREQ\t5 = TEMP\t\t6 = Quit\n"); func = 0; fprintf(stdout," Selection (1-6): "); gets(response); func = atoi(response); } while((func < 1) || (func > 6)); if(func == 6) /* If Quit, exit program */ break;...
Page 169 Computer Operations Computer Interface Commands and Operation Scan and receive data fprintf(stdout,"\nMeasuring %s...\n",configStr); for(index=0;index < 3;++index) /* scan three times */ unsigned chanIndex; /* Channel counter */ asiputs(COM2,"*TRG",-2); /* trigger scan */ checkResponse(); /* get prompt */ asiputs(COM2,"SCAN_TIME?",-2); /* request time stamp for scan */ checkResponse();...
Page 170 2635A Users Manual This function checks the Hydra prompt after sending a command to Hydra, to see if an error occurred. Possible responses are: "=>(CR)(LF)" (Command successful) "?>(CR)(LF)" (Command syntax error) "!>(CR)(LF)" (Command execution error) static int checkResponse() char response[129]; /* Gets string from Hydra -- asigets_timed gets characters from the receive buffer, and strips the (CR)(LF) characters from...
Page 171: Printer Operations
Chapter 5 Printer Operations Title Page Summary of Printer Operations................. 5-3 Connecting the Instrument to a Printer.............. 5-3 Configuring for Printer Operations ..............5-5 Printing Measurement Data and Memory Card Directory ........ 5-6 Problems?...................... 5-6 Printing Measurement Results During Scanning .......... 5-6 Printing the Review Array ................
Page 172 2635A Users Manual REVIEW LAST mVDCA C k Hz 300V BUSY BATT op83f.eps...
Page 173: Summary Of Printer Operations
Printer Operations Summary of Printer Operations Summary of Printer Operations Printer operations allow an RS-232 connection between the instrument and a printer to print out measurement results during scanning, the Review array, and a directory of the memory card files. The printer must accept a serial data input, either directly or via a serial-to-parallel converter.
Page 174 2635A Users Manual SERIAL-INPUT PRINTER HYDRA PRINTER RS-232 DB-25 CONNECTOR RS-232 FLUKE RS40 OR RS42 CABLE RS-232 (DB-9) (OR EQUAL) (DB-25) (MALE) (RS40 MALE OR RS42 FEMALE) PRINTER PARALLEL-INPUT PRINTER HYDRA CENTRONICS- TYPE 36-PIN CONNECTOR SERIAL-TO-PARALLEL CONVERTER RS-232 FLUKE RS40 OR RS42 CABLE...
Page 175: Configuring For Printer Operations
Printer Operations Configuring for Printer Operations Configuring for Printer Operations Correct operation of the instrument RS-232 link with a printer depends on the link parameters baud rate, parity, and CTS (Clear To Send). Perform the procedure in Figure 5-3 to establish communication link parameters. Refer to your printer manual for information on selecting identical parameters for the printer, usually through the setting of DIP (dual in-line package) switches (with the printer unpowered).
Page 176: Printing Measurement Data And Memory Card Directory
3. Missed characters. The Data Bucket Hydra Series II RS-232 port is different from the RS-232 port on the Data Acquisition Hydra Series II (Model 2620A) and Data Logger Hydra Series II (Model 2625A), because of the addition of three modem control lines, CTS, RTS, and DSR (see Appendix D).
Page 177 Printer Operations Printing Measurement Data and Memory Card Directory SHIFT FILES Setting the DESTINATION Parameter. Press dESt the SHIFT key, release, then press the FILES both key to open the destination menu. Select both Print (Both) to route measurement data to both the memory card and printer;...
Page 178: Printing The Review Array
2635A Users Manual Printing the Review Array Perform the procedure in Figure 5-4 to print the Review array, which consists of the last, maximum, and minimum measurement values during the last scan, and previous scans if the instrument configuration has not changed or the review array cleared. If the Review array is blank (cleared), an error message is displayed with an audible "beep."...
Page 179: Printing The Directory Of The Memory Card
Printer Operations Printing Measurement Data and Memory Card Directory Printing the Directory of the Memory Card Perform the procedure in Figure 5-5 to print the directory of the memory card files. The format is similar to a PC directory for a disk drive and will print any files that exist on the memory card.
Page 180 2635A Users Manual 5-10...
Page 181: Modem Operations
Chapter 6 Modem Operations Title Page Summary of Modem Operations ............... 6-3 Connecting the Modem to a PC for Modem Configuration ......6-4 Configuring the Instrument Modem for Modem Operations ......6-4 Connecting the Modem to an Instrument ............6-6 Configuring the Instrument for Modem Operations..........
Page 182 2635A Users Manual REVIEW LAST mVDCA C k Hz 300V BUSY BATT op84f.eps...
Page 183: Summary Of Modem Operations
Modem Operations Summary of Modem Operations Summary of Modem Operations Modem operations allow an RS-232 connection between an instrument and a PC via modems and telephone lines, instead of a direct RS-232 connection as described in Chapter 4, "Computer Operations." Due to the wide variety of modems available and their corresponding software, only the most common connection using a Hayes- compatible modem using the AT command set is described.
Page 184: Connecting The Modem To A Pc For Modem Configuration
Figure 6-2. The modem RS-232 port (DB-25 connector) is cabled to a PC serial COM port that uses either a DB-9 connector or DB-25 connector. The connecting cable can be fabricated (See Appendix D) or ordered from Fluke as an option (see Chapter 1). Configuring the Instrument Modem for Modem Operations Commands to configure the modem are sent from the PC that is running communications software.
Page 185 Modem Operations Configuring the Instrument Modem for Modem Operations MODEM CONNECTION WITH PC DB-9 CONNECTOR MODEM RS-232 RS-232 PORT (DB-9) FLUKE RS41 CABLE (DB-25) (MALE) (FEMALE ) (OR EQUAL) MODEM CONNECTION WITH PC DB-25 CONNECTOR MODEM RS-232 PORT RS-232 PORT...
Page 186: Connecting The Modem To An Instrument
Remove the cable from the PC and connect to the Data Bucket, as shown in Figure 6-3. If a different cable is used, be sure it is a modem cable. HYDRA MODEM FLUKE RS41 CABLE RS-232 RS-232 PORT (OR EQUAL)
Page 187: Configuring The Instrument For Modem Operations
Modem Operations Configuring the Instrument for Modem Operations Configuring the Instrument for Modem Operations Correct operation of the instrument RS-232/modem link depends on the baud rate, parity, CTS (Clear To Send), and Echo of the link parameters Perform the procedure in Figure 6-4 to establish the communication link parameters.
Page 188: Testing The Rs-232/Modem Interface
Then enter the command *IDN? <ENTER> (since ECHO OFF was selected in Figure 6-4, the *IDN? characters will not appear on screen). The return should be FLUKE,2635A,0,Mn.n An.n Dn.n Ln.n where n.n is replaced with the versions of the displayed parameters. (See the *IDN? command in Chapter 4 for more information.)The RS-232/modem link is operating correctly and the PC may now operate using Starter or Logger applications software, or custom software.
Page 189: Maintenance
Chapter 7 Maintenance Title Page Introduction ....................... 7-3 Cleaning......................7-3 Line Fuse ......................7-3 Selftest Diagnostics and Error Codes..............7-4 Performance Tests ..................... 7-4 Accuracy Verification Test ................7-7 Channel Integrity Test................... 7-8 Thermocouple Measurement Range Accuracy Test ........7-9 Four-Terminal Resistance Test ..............
Page 190 2635A Users Manual 5790A AC MEASUREMENT STANDARD CALIBRATOR REVIE W LAST mVDCA C k Hz 300V BUSY BATT op85f.eps...
Page 191: Introduction
Maintenance Introduction Introduction This chapter describes basic maintenance that the instrument user can perform. Do not attempt any maintenance not described in this chapter. For additional maintenance, service, and calibration procedures, qualified service personnel can refer to the Hydra Series II Service Manual (part number 688868). Cleaning WWarning Keep the instrument dry to avoid electrical shock to personnel...
Page 192: Selftest Diagnostics And Error Codes
Performance Tests When received, the 2635A Hydra Series II is calibrated and in operating condition. The following Performance Verification Procedures are provided for acceptance testing upon initial receipt or to verify correct instrument operation. All tests may be performed in sequence to verify overall operation, or the tests may be run independently.
Page 193 Maintenance Performance Tests Each of the measurements listed in the following steps assume the instrument is being tested after a 1/2 hour warmup, in an environment with an ambient temperature of 18 to 28ºC, and a relative humidity of less than 70%. Note All measurements listed in the performance test tables are made in the slow reading rate unless otherwise noted.
Page 194 (Minimum specifications are the same as in the Standard Equipment List) Instrument Type Recommended Model DC Voltage Calibrator Fluke 5700A DMM Calibrator Fluke 5100B (for AC Volts only) Function/Signal Generator Philips PM5193 or Fluke 6011A Decade Resistance Source Gen Rad 1433H...
Page 195: Accuracy Verification Test
2. Connect a cable from the Output VA HI and LO connectors of the 5700A to the VΩ and COM connectors on the front panel of the Hydra Series II. Select the channel 0 function and range on the Hydra Series II and the input level from the 5700A using the values listed in Table 7-3.
Page 196: Channel Integrity Test
2635A Users Manual Table 7-3. Performance Tests (Voltage, Resistance, and Frequency) (cont) Using inputs in decades of 1.9: 300 e short 0.00 0.09 190 e 189.93 190.12 3 ke short 0.0000 0.0003 1.9 ke 1.8992 1.9008 30 ke 19 ke 18.992 19.008 300 ke...
Page 197: Thermocouple Measurement Range Accuracy Test
8. Connect a cable from the Output VA HI and LO of the 5700A to the Input Module test leads (observe proper polarity). 9. Select the VDC function and 300 volt range on the Hydra Series II and first apply 0V dc then 290V dc input from the 5700A. Ensure the display reads between the minimum and maximum values as shown in Table 7-3 for the 0 and 290V dc input levels.
Page 198: Four-Terminal Resistance Test
The value returned should now be 90 mV ±0.028 mV (between 89.97 and 90.028 mV). 6. Change Hydra Series II's channel 0 function to the internal 900 mV dc range by redefining channel 0. Send the following commands: MON 0 <CR>...
Page 199: Open Thermocouple Response Test
Maintenance Performance Tests Note If other than a T-type thermocouple is used, be sure that the instrument is set up for the type of thermocouple used. 3. Reconnect power and switch the instrument ON. 4. Insert the thermocouple and a mercury thermometer in a room temperature bath. Allow 20 minutes for thermal stabilization.
Page 200 2635A Users Manual 13 14 15 16 17 18 19 20 SOURCE H L H L H L H L H L H L H L H L H L (4-WIRE) HYDRA INPUT MODULE SENSE H L H L H L H L H L H L H L H L H L (4-WIRE) 5700A OUTPUT...
Page 201: Rtd Temperature Accuracy Test
5. Select the Four-terminal RTD temperature function, RTD type PT, for channel 1 on the Hydra Series II. Press M, select a Decade Resistance value, and ensure the display reads between the minimum and maximum values shown on Table 7-5.
Page 202: Rtd Temperature Accuracy Test (Using Din/Iec 751 Rtd)
2635A Users Manual 4-WIRE (4T) CONNECTION 13 14 15 16 17 18 19 20 SOURCE H L H L H L H L H L H L H L H L H L (4-WIRE) HYDRA INPUT MODULE SENSE H L H L H L H L H L H L H L H L H L (4-WIRE) DECADE RESISTANCE...
Page 203: Digital Input/Output Verification Tests
GROUND and 0 through 7 terminals. Leave the other wire ends unconnected at this time. Reinstall the connector. 4. Switch power ON to both Hydra Series II and the host. Verify that Hydra Series II is not scanning. If Hydra Series II is scanning, press Q to turn scanning off, then cycle power off-on again.
Page 204: Digital Input Test
6. Using either a terminal or a computer running a terminal emulation program, set up Hydra Series II to turn Digital Outputs ON (LOW state). In sequence send the following commands to Hydra Series II and measure that the correct Digital Output line transitioned LOW measures less than+0.8V dc.
Page 205: Totalizer Test
Series II. 1. Ensure that communication parameters ( i.e., transmission mode, baud rate, parity, CTS, and echo mode) on Hydra Series II and the host are properly configured to send and receive serial data. Refer to Chapter 4. 2. Switch OFF power to the instrument and disconnect all high voltage inputs.
Page 206: Totalizer Sensitivity Test
2. Remove the jumper connecting the (SUM) terminal test lead to output 0’s test lead. 3. Ensure that Hydra Series II is still in the totalize display mode. If not, press the O button. Reset the totalizer count shown on the display by pressing Hydra Series II’s front panel K button followed by O (ZERO) button.
Page 207 L (low) test lead. 7. On Hydra Series II, select the VDC function, 3V range, and assign a HI alarm limit of +1.0000 for channels 0 through 3. Set up all other channels (4-20) to the OFF function.
Page 208 2635A Users Manual ALARM OUTPUTS DIGITAL I/O ALARM OUTPUT CONNECTOR Σ Σ + – 1 2 3 TR 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 + – 1 2 3 TR +30V 9-16 V DC PWR...
Page 209: External Trigger Input Test
(TRIGS) buttons (the display shows TRIG), then press either the up or down arrow buttons to display ON. Press E. 6. Press Hydra Series II’s Q button. Hydra Series II should scan channels 0 through 5 once every 30 seconds.
Page 210: Variations In The Display
CAL ENABLE until CAL disappears from the display (or press power OFF). Refer to the Hydra Series II Service Manual for the essential calibration procedures. Variations in the Display Under normal operation, the display presents various combinations of brightly and dimly lit annunciators and digits.
Page 211: Appendices
Appendices Appendix Title Page Specifications....................... A-1 Crosstalk Considerations ..................B-1 Binary Upload of Logged Data................C-1 RS-232 Cabling....................D-1 8-Bit Binary-Coded-Decimal Table..............E-1 Memory Card File Formats.................. F-1 True RMS Measurements ..................G-1...
Page 213: A Specifications
Appendix A Specifications Introduction The instrument specifications presented here are applicable within the conditions listed in the Environmental chapter. The specifications state total instrument accuracy following calibration, including: • A/D errors • Linearization conformity • Initial calibration errors • Isothermality errors •...
Page 214 2635A Users Manual Table A-1. DC Voltage Measurements - Resolution Range Resolution Slow Fast 90 mV* 1 µV 10 µV 300 mV 10 µV 0.1 mV 0.1 mV 1 mV 1 mV 10 mV 300V 10 mV 0.1 V 900 mV** 10 µV 0.1 mV Not used in Autoranging...
Page 215 Appendices Specifications Maximum Input 300V dc or ac rms on any range for channels 0,1, and 11 150V dc or ac rms for channels 2 to 10 and 12 to 20 Voltage ratings between channels must not be exceeded. Cross-Talk Rejection Refer to Appendix B.
Page 216 2635A Users Manual AC Voltage Inputs (True rms AC Voltage, AC-Coupled Inputs) Resolution See Table A-3. Table A-3. AC Voltage Measurements - Resolution Range Resolution Minimum Input for Rated Slow Fast Accuracy 10 µV 100 µV 300 mV 20 mV 100 µV 1 mV 200 mV...
Page 217 Appendices Specifications Temperature Measurements (Thermocouples) Accuracy See Table A-5. Table A-5. Temperature Measurements - Accuracy (Thermocouples) (IPTS-68) Thermocouple Accuracy (±°C)* 18°C to 28°C 0°C TO 60°C Type Temperature 90 Days 1 Year 1 Year 1 Year 1 Year (C°) Slow Slow Fast Slow...
Page 218 2635A Users Manual Table A-6. Temperature Measurements - Accuracy (Thermocouples) (ITS-90) Thermocouple Accuracy (±°C)* 18°C to 28°C 0°C to 60°C Type Temperature 90 Days 1 Year 1 Year 1 Year 1 Year (°C) (°C) Slow Slow Fast Slow Fast -100 to -30 0.42 0.43 0.91...
Page 219 Appendices Specifications Input Impedance 100 MΩ minimum in parallel with 150 pF maximum Common Mode and Normal Mode Rejection See the specifications for dc voltage measurements. Cross-Talk Rejection Refer to Appendix B. Open Thermocouple Detect Small ac signal injection and detection scheme before each measurement detects greater than 1 to 4 kΩ...
Page 220 2635A Users Manual Table A-9. Temperature Measurements - Accuracy (RTDs) (IEC751) (IPTS-68) 4-Wire Accuracy* (±°C) Resolution 18°C to 28°C 0°C to 60°C Temperature Slow Fast 90 Day 1 Year 1 Year 1 Year 1 Year (°C) Slow Slow Fast Slow Fast -200.00 0.02...
Page 221 Appendices Specifications Resolution See Table A-10. Table A-10. AC Voltage Measurements - Resolution Range Resolution Minimum Input for Rated Slow Fast Accuracy 10 µV 100 µV 300 mV 20 mV 100 µV 1 mV 200 mV 1 mV 10 mV 150/300V 10 mV 100 mV...
Page 222 2635A Users Manual Maximum Voltage Input VS. Frequency Input See Table A-12. Table A-12. AC Voltage Measurements Frequency Maximum Input at Upper Frequency 20 Hz - 50 Hz 300V rms 50 Hz - 100 Hz 300V rms 100 Hz - 10kHz 200V rms 10 kHz - 20 kHz 100V rms...
Page 223 Appendices Specifications Resistance Measurements Resolution See Table A-13. Table A-13. Resistance Measurements - Resolution. Range Resolution Typical Full Maximum Maximum Scale Voltage Current Open Circuit Through Voltage Unknown Slow Fast 300Ω 10 mΩ 0.1Ω 0.22V 1 mA 3.2V 3 kΩ 0.1Ω...
Page 224 2635A Users Manual 2-Wire Accuracy Add 4.0Ω to accuracy specifications for channels 1 to 20, and add 20 mΩ for channel 0. Lead wire resistances are not included. 300V dc or ac rms on all ranges Cross-Talk Rejection Refer to Appendix B. Frequency Measurements Resolution and Accuracy See Table A-15.
Page 225 Appendices Specifications Maximum AC Input 300V rms or 424V peak on channels 0, 1, and 11 150V rms or 212V peak on channels 2 to 10 and 12 to 20 Voltage ratings between channels must not be exceeded 2 x 10 Volt-Hertz product on any range, normal mode input 1 x 10 Volt-Hertz product on any range, common mode input...
Page 226 2635A Users Manual Maximum Autoranging Time See Table A-18 (shown in seconds per channel). Totalizing Input Input Voltage 30V maximum 4V minimum 2V peak minimum signal Isolation None dc-coupled Table A-18. Autoranging Rates Function Range Change Slow Fast 300 mV ---------------------------->...
Page 227 Appendices Specifications Input Voltage 30V maximum -4V minimum Isolation none dc-coupled Threshold 1.4V Hysteresis 500 mV Trigger Inputs Input Voltages contact closure and TTL compatible “high” =2.0V min, 7.0V max “low” = -0.6V min, 0.8V max Isolation None dc-coupled Minimum Pulse Width 5 µs Maximum Frequency 5 Hz...
Page 228 2635A Users Manual Digital and Alarm Outputs The specifications for the digital and alarm outputs are provided in the following paragraphs. Output Logic Levels Logical “zero”: 0.8V max for an Iout of -1.0 mA (1LSTTL load) Logical “one”: 3.8V min for an Iout of 0.05 mA (1LSTTL load) For non-TTL loads: 1.8V max for an Iout or -20 mA Logical “zero”: 3.25 max for an Iout of -50 mA...
Page 229 Appendices Specifications Relative Humidity (Non-Condensing) 90% maximum for 0°C to 28°C 75% maximum for 28°C to 35°C 50% maximum for 35°C to 50°C 35% maximum for 50°C to 60°C (Except 70% maximum for 0°C to 35°C, 0% maximum for 40°C to 50°C, and 20% maximum for 50°C to 60°C for the 300 ke, 3 Me, and 10 Me ranges.) Altitude Operating: 2,000 m maximum...
Page 230 2635A Users Manual Voltage Ratings Channels 0,1, and 11 are rated at 300V dc or ac rms maximum from a channel terminal to earth and from a channel terminal to any other channel terminal. Channels 2 to 10 and 12 to 20 are rated at 150V dc or ac rms maximum from a channel terminal to any other channel terminal within channels 2 to 10 and 12 to 20.
Page 231: B Crosstalk Considerations
Appendix B Crosstalk Considerations Introduction This appendix augments the discussion of ac signal effects on other channels (crosstalk). Effects on each measurement function are discussed below. These numbers should only be considered as references. Since cross talk can be introduced into a measurement system in many places, each setup must be considered individually.
Page 232 2635A Users Manual AC Signal Cross Talk into an AC Voltage Channel   VACrms error   ACV Error Ratio = ×   VACrms crosstalk Frequency crosstalk Range Ratio (worst case) Ratio (typical)     × ×...
Page 233 Appendices Crosstalk Considerations     MOhms MOhms × × 10.000 Me         Vrms Vrms For example, to find the typical effect of a 60 Hz, 100V ac signal on another channel for the 30 kΩ...
Page 234 2635A Users Manual...
Page 235: C Binary Upload Of Logged Data
Appendix C Binary Upload of Logged Data Introduction The LOG_BIN? <index> query can be used to quickly upload logged data from a 2635A. The response is a single ASCII string, which encodes the raw binary data stored at the specified <index> position. The logged data is also retained in the 2635A. The measurement data returned from the 2635A is in the (binary) IEEE single-precision floating point format.
Page 236 2635A Users Manual number of channels for the scan. The following C code converts a LOG_BIN? response string into a byte array: -* decode(): Decode LOG_BIN? response string into raw byte stream ** Decoding is done on multiples of four input bytes: 543210 543210 543210...
Page 237 Appendices Binary Upload of Logged Data 0, 0x3f, 2, 1, 0x30, 4, /* dst[0] from src[0] and src[1] */ 1, 0x0f, 4, 2, 0x3c, 2, /* dst[1] from src[1] and src[2] */ 2, 0x03, 6, 3, 0x3f, 0, /* dst[2] from src[2] and src[3] */ auto unsigned char n;...
Page 238 LSB of the exponent. The number is formatted as shown in Table C-1. For all other measurement queries, Hydra Series II returns the string "+9E+9" for open thermocouple (OTC) measurement values. However, for the LOG_BIN?query, NaN (not a number) is returned instead.
Page 239 7f c0 00 00 (hex). For all other measurement queries, Hydra Series II usually returns ±1e9 for overload (OL) measurement values. However, for the LOG_BIN? query, Hydra Series II returns Inf (infinity) instead.
Page 240 2635A Users Manual /* Import globals from main program */ extern int timestamp[]; extern int misc[]; extern float values[]; -* convert(): Convert a LOG_BIN? array of binary data into useful data ** Converts BCD values to integer, raw floating point values into float ** values usable under the Intel x86 (IBM PC) architecture.
Page 241 Appendices Binary Upload of Logged Data Example Figure C-3 is a short example that uses the routines in Figures C-1 and C-2 to decode a fixed (pre-computed) LOG_BIN? response string. When compiled and run on an Intel architecture computer, the program should print "Conversion worked".
Page 242 2635A Users Manual /* Globals convert() uses for destination */ int timestamp[6]; /* Scan timestamp */ int misc[3]; /* Temperature units, measurement rate, digital I/O */ float values[22]; /* Measurement values */ extern int isnan(); /* Floating point value is NaN (not a number) */ extern int isinf();...
Page 243: Rs-232 Cabling
(Fluke 17XXA series), printer, or modem. All connections can be made using the Fluke RS-series of cables (see Options and Accessories in Chapter 1). RS-232 cables should not exceed 50 feet (15 meters) although longer cables are permitted if the load capacitance measured at a connection point (including signal terminator) does not exceed 2500 picofarads.
Page 244 2635A Users Manual For example, connection to a serial-to-parallel converter (when using a printer with a parallel input) may be as a DTE (cable RS42) or DCE (cable RS40). GENERIC (NULL MODEM) HYDRA RS43 (DTE) (DTE) (DB-9/MALE) (DB-9/MALE) HYDRA RS40 (DTE) (DTE) (DB-25/MALE)
Page 245 DTR – DATA TERMINAL READY GND – GROUND DSR – DATA SET READY RTS – REQUEST TO SEND CTS – CLEAR TO SEND RI – RING INDICATOR op73f.eps Figure D-2. Hydra Series II (DB-9) to PC (DB-9) RS-232 Connection (Generic)
Page 246 2635A Users Manual RS40 CABLE (OR EQUAL) HYDRA RS-232C DB-9 PINS Tx – TRANSMIT FEMALE Rx – RECEIVE MALE RTS – REQUEST TO SEND CTS – CLEAR TO SEND DSR – DATA SET READY GND – GROUND DCD – DATA CARRIER DETECT DTR –...
Page 247 CTS – CLEAR TO SEND DB-25 DSR – DATA SET READY GND – GROUND DCD – DATA CARRIER DETECT DTR – DATA TERMINAL READY RI – RING INDICATOR op75f.eps Figure D-4. Hydra Series II (DB-9 to Modem (DB-25) RS-232 Connection...
Page 248 CTS – CLEAR TO SEND DB-25 DSR – DATA SET READY GND – GROUND DCD – DATA CARRIER DETECT DTR – DATA TERMINAL READY RI – RING INDICATOR op76f.eps Figure D-5. Hydra Series II (DB-9) to Printer (DB-25) RS-232 Connection...
Page 249 Appendices RS-232 Cabling SOLDER CONNECTOR SIDE SIDE MALE FEMALE CONNECTOR SOLDER SIDE SIDE DB-9 CONNECTOR SOLDER CONNECTOR SIDE SIDE MALE FEMALE CONNECTOR SOLDER SIDE SIDE DB-25 CONNECTOR op77f.eps Figure D-6. RS-232 DB-9 and DB-25 Connectors...
Page 250 2635A Users Manual...
Page 251: 8-Bit Binary-Coded-Decimal Table
Appendix E 8-Bit Binary-Coded-Decimal Table...
Page 252: E 8-Bit Binary-Coded-Decimal Table
2635A Users Manual Table E-1. 8-Bit Binary-Coded-Decimal Binary Binary Binary Binary 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0...
Page 253: Memory Card File Formats
Appendix F Memory Card File Formats Introduction This appendix contains a description of the format of the binary files created by the 2635A Data Bucket. This information is intended to describe the contents in enough detail to allow someone well versed in a software programming language to use this information to write software to read and interpret the Data Bucket scan data files.
Page 254 2635A Users Manual Offset Description ===== =========== File type; 0 for setup files, 1 for data files. File format; always zero for this format. 2-81 Tag string. Copied from the setup file used with a time string appended; or just a time string if no setup file used. Set up format version;...
Page 255 Appendices Memory Card File Formats For a data file, any scan data would immediately follow the configuration information. Note that it is very possible to have no scan data if the data file is created but scanning is never done. Measurements are stored in scan records of variable size.
Page 256 2635A Users Manual /* Hydra Data Bucket data file format: */ struct hydra_config { unsigned char file_type; unsigned char file_format; unsigned char tag[80]; unsigned char setup_format; unsigned char system; unsigned char rate; unsigned char trigger; unsigned char format; unsigned char total_debounce; unsigned char interval_bcd_hours;...
Page 257 Appendices Memory Card File Formats The following function will copy the configuration information from the data file into the ‘hydra’ structure, keeping track of the number of configured channels and filling the channel index table as it goes. It assumes that the first 730 bytes of the file have already been read into memory using the read () library function, or similar.
Page 258 2635A Users Manual hydra.chan[ch].function = *file_data++; hydra.chan[ch].range = *file_data++; hydra.chan[ch].temperature = *file_data++; hydra.chan[ch].alarm_flags = *file_data++; file_data += convert_float(&hydra.chan[ch].alarm_limit_1, file_data); file_data += convert_float(&hydra.chan[ch].alarm_limit_2, file_data); hydra.chan[ch].alarm_assoc_1 = *file_data++; hydra.chan[ch].alarm_dr_1 = *file_data++; hydra.chan[ch].alarm_assoc_2 = *file_data++; hydra.chan[ch].alarm_dr_2 = *file_data++; file_data += convert_float(&hydra.chan[ch].m, file_data); file_data += convert_float(&hydra.chan[ch].b, file_data); hydra.chan[ch].m_dr = *file_data++;...
Page 259 Appendices Memory Card File Formats Now that the configuration has been processed and the number of valid channels has been determined, the scan data can be processed. /* Measurements are stored in scan records of variable size. ** This C structure is the decoded version of a scan record, ** and is of fixed size (unused measurement values are not set).
Page 260 2635A Users Manual /* Set timestamp */ scan->bcd_hours = *file_data++; scan->bcd_minutes = *file_data++; scan->bcd_seconds = *file_data++; scan->bcd_month = *file_data++; scan->bcd_day = *file_data++; scan->bcd_year = *file_data++; /* Get digital I/O and totalizer values */ scan->dout = *file_data++; scan->dio = *file_data++; file_data += convert_float(&scan->total, file_data); /* Get measurement for each non-off channel in this scan */ for (index=0;...
Page 261: G True Rms Measurements
Appendix G True RMS Measurements Introduction The instrument measures the true value of ac voltages. In physical terms, the rms (root- means-square) value of a waveform is the equivalent dc value that causes the same amount of hear to be dissipated in a resistor. True rms measurement greatly simplifies the analysis of complex ac signals.
Page 262 2635A Users Manual PEAK VOLTAGES MEASURED VOLTAGES DC AND AC TOTAL RMS AC-COUPLED AC COMPONENT ONLY INPUT TRUE RMS = PK-PK 0-PK COMPONENT WAVEFORM RMS CAL HYDRA ONLY ac + dc SINE 2.828 1.414 1.000 PK-PK 1.000 0.000 1.000 RECTIFIED SINE 1.414 (FULL WAVE) 1.414...
Page 263 Hydra Configuration Record SET-UP NAME_________________________________________ DATE_________________________ q Slow q °C q°F SCAN RATE: TEMPERATURE UNITS q Fast RS-232-C COMMUNICATION Baud Rate q 38400 q 19200 q 9600 q 4800 SCAN INTERVAL:_______ :_______: _______ q 2400 q 600 q 300 1200 q Printer q Even q None...
Page 264 Hydra Memory Card Record DATA FILES SET-UP FILES DATxx Application Note SETxx Application Note...
Page 265 Index channel integrity test, 7-8 cleaning, 7-3 —2— Clearing alarm parameters from a channel, 2-19 2-wire accuracy, A-8, A-12 Clearing Mx+B scaling from a channel, 2-23 Common mode rejection, A-10 —A— computer interface command set, 4-18 computer interface commands and AC operation, 1-13 operation, 4-12 Ac signal cross talk in a dc voltage channel, B-1...
Page 266 2635A Users Manual DC operation, 1-13 memory card capacity, 3-4 DC power, 1-17 Memory card capacity, 2-26 Decoding the ascii string, C-1 Memory card data extraction, 2-27 dedicated alarm output test, 7-18 Memory card exchange during scanning, 2-26 Digital I/O, 1-18 memory card file operations to and digital I/O connections, 1-18 from a pc, 3-16...
Page 267 Index (continued) setting up the instrument, 1-11 totalizer channel, 1-9 setup and data file current status, 3-15 Totalizer input, 1-18 setup and data files directory, 3-14 Totalizer sensitivity test, 7-18 setup file procedures, 3-9 Totalizer test, 7-17 Standard event status register (ESR), 4-16 Totalizing input, A-14 Status byte register (STB), 4-17 Triggering options and memory card...
Page 268 2635A Users Manual...

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2635a

Fluke Hydra Series II User Manual

Preparation for Use

Chapter 1

Front Panel Operations

Chapter 2

Memory Card Operations

Chapter 3

Computer Operations

Chapter 4

Printer Operations

Chapter 5

Modem Operations

Chapter 6

Maintenance

Chapter 7

Appendices

Appendix

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