Fluke 2638A User Manual
  1. Manuals
  2. Brands
  3. Fluke Manuals
  4. Data Loggers
  5. 2638A
  6. User manual

Fluke 2638A User Manual

Hydra series iii data acquisition unit
Hide thumbs Also See for 2638A:
Table of Contents

Advertisement

Quick Links

Download this manual
2638A
HYDRA Series III Data Acquisition Unit
Users Manual
June 2013 Rev. 1, 5/16
© 2013-2016 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
Fluke-Direct
All product names are trademarks of their respective companies.
.com
info@Fluke-Direct.com
1.888.475.5235

Advertisement

Table of Contents
loading

Related Manuals for Fluke 2638A

Summary of Contents for Fluke 2638A

  • Page 1 2638A HYDRA Series III Data Acquisition Unit Users Manual June 2013 Rev. 1, 5/16 © 2013-2016 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. Fluke-Direct All product names are trademarks of their respective companies. .com info@Fluke-Direct.com...
  • 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 only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price.

  • Page 3: Table Of Contents

    Safety Information ..................... 1-7 Screen Capture Feature ..................1-9 About this Manual ..................... 1-10 The Product Manual Set ..................1-10 How to Contact Fluke Calibration ..............1-11 Calibration and Repair Information ..............1-11 General Specifications ..................1-12 Measurement Specifications ................1-14 DC Voltage ....................
  • Page 4 Thermocouple Measurement Characteristics ..........1-22 Digital I/O ...................... 1-22 Totalizer ......................1-22 Trigger ......................1-23 Alarm Output ....................1-23 2638A-100 Universal Input Module ..............1-23 General ......................1-23 Initial Setup and Configuration ............2-1 Introduction ......................2-1 Set the Regional Voltage ................... 2-1 Connect to Mains Power ..................
  • Page 5 Graph the Measurements ................... 5-3 Measurement Statistics ..................5-4 Maintenance and Care ................ 6-1 Introduction ......................6-1 Clean the Product ....................6-1 Replace the Fuse ....................6-1 Memory Reset and Factory Reset ..............6-2 Firmware Update ....................6-3 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...
  • Page 6 2638A Users Manual User-Replaceable Parts and Accessories ............6-5 Error Messages and Troubleshooting ..........7-1 Introduction ......................7-1 Error Messages ....................7-1 Troubleshooting ....................7-17 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...
  • Page 7 Scan Data Memory Usage ..................4-15 5-1. Statistics ......................... 5-4 6-1. Fuses ........................6-1 6-2. Comparison of the Memory Clear Functions ............6-2 6-3. User-Replaceable Parts and Accessories ..............6-5 7-1. Error Messages ....................... 7-1 7-2. Troublehooti ng Chart ..................... 7-17 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...
  • Page 8 Setup.csv and Dat00001.csv Files ................4-17 5-1. Example Voltage Front-Panel Connection ............. 5-1 5-2. Input Function Selection ..................5-2 5-3. Relative Measurement .................... 5-3 5-4. Graph Function ....................... 5-3 5-5. DMM Statistics ...................... 5-4 6-1. Fuse Replacement ....................6-2 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 9: Product Overview And Specifications

    Product Overview The Fluke 2638A HYDRA Series III Data Acquisition Unit (the Product or Instrument) is a portable bench-top data logger that measures and records dc volts, ac volts, dc current, ac current, resistance, frequency, and temperature (see Table 1-1). See the Specifications section for information on the types and ranges of the measurement inputs the Product can accept.
  • Page 10 2638A Users Manual • Alarms – Each channel can be assigned two independent alarms to indicate when either an upper (HI) or lower (LO) range has been exceeded. The alarms can be configured to output a digital signal from the rear-panel alarm output for control of external devices.

  • Page 11: Front And Rear-Panel Overview

    Function Puts the Product in the standby mode. In standby, the display is off and Standby Key the keys are disabled. Standby mode also disables remote operation.  See “Power ON and Standby” in Chapter 2. Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...
  • Page 12 See “Input Module and Relay Card Installation” in Module Indicator  Chapter 2. The model 2638A/05 will only indicate one active slot. Scan all active channels. The Scan function samples all active channels directed by the test setup file. The Monitor function shows Scan/Monitor ...
  • Page 13 Table 1-2. Rear-Panel Features 1 2 3 4 5 6 7 8 1 2 3 4 5 6 hce002.eps Item Name Function Line Voltage Regional voltage selector. See “Set the Regional Voltage” in Chapter 2.  Selector and Fuse Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...
  • Page 14 Chassis Ground  used to connect other instruments to earth ground. USB port used for remote operation. See the 2638A Remote Programmers Serial USB Port  Guide.

  • Page 15: Safety Information

    Product Category: With reference Standards. to the equipment types in the WEEE Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation” product. Do not dispose of this product as unsorted municipal waste. Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...
  • Page 16 2638A Users Manual WXWarning To prevent possible electrical shock, fire, or personal injury: • Read all safety information before you use the Product. • Carefully read all instructions. • Use the Product only as specified, or the protection supplied by the Product can be compromised.

  • Page 17: Screen Capture Feature

    The display shows “File Saved”. 3. Remove the USB from the front panel and connect it to a USB drive on a PC. 4. Open the USB drive and navigate to the image folder with this path: \\fluke\2638A\[Product Serial Number]\Image PRINT 3 seconds hce059.eps...

  • Page 18: About This Manual

    The Users Manual is translated into many languages. • The 2638A Safety Information is printed and contains important safety information for this Product. The Safety Information is translated into many languages. • The 2638A Remote Programmers Guide contains information on how to remotely operate the Product.

  • Page 19: General Specifications

    Current channels ..........7 Digital I/O ............8 bits Totalizer .............. 1 Alarm outputs............6 Trigger input ............1 Channel Capacity: 2638A/05 Total analog channels ..........23 Voltage/resistance channels ........21 Current channels ............. 2 Safety Protection Mains Input ............IEC 61010-1, Overvoltage Category II, Pollution Degree 2 Measurement Front Panel ........
  • Page 20 Command protocol ..........SCPI Dimensions Height ..............150 mm Width ..............245 mm Depth ..............385 mm Weight ..............6 kg (typical configuration) Shipping Weight..........9.5 kg (typical configuration) Conformity ............. CE, CSA, IEC 61010 3 1-13 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 21: Measurement Specifications

    2638A Users Manual Measurement Specifications Accuracy specifications generally are valid for 6 ½ digit resolution mode (unless otherwise noted) for front panel input (Channel 001), after a minimum of 1-hour warm-up, and within an environment temperature range of 18 °C to 28 °C.

  • Page 22: Dc Voltage Additional Errors

    1 MΩ ±2 % shunted by 150 pF 10 V 10.00000 V 1 mV 100 µV 10 µV 100 V 100.0000 V 10 mV 1 mV 100 µV 300 V 300.000 V 100 mV 10 mV 1 mV 1-15 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 23: Ac Voltage Accuracy

    2638A Users Manual AC Voltage Accuracy Accuracy is given as ± (% measurement + % of range). T.C./ °C 24 Hour 90 Days 1 Year Range Frequency Outside (23 ±1 °C) (23 ±5 °C) (23 ±5 °C) 18 °C to 28 °C 20 Hz to 20 kHz 0.1 % + 0.05 %...

  • Page 24: Dc Current Accuracy

    <10 mV (RMS) 1 kΩ 10 mA 10.00000 mA 1 µA 100 nA 10 nA 10 Ω <20 mV (RMS) 100 mA 100.0000 mA 10 µA 1 µA 100 nA 10 Ω <50 mV (RMS) 1-17 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 25: Ac Current Accuracy

    2638A Users Manual AC Current Accuracy Accuracy is given as ± (% measurement + % of range). Basic accuracy specification is for a sinusoidal signal with amplitude greater than 5 % of range. For input signals between 1 % to 5 % of range, add 0.1 % of range.

  • Page 26: Resistance Input Characteristics

    Resistance Range ..........0 Ω to 4 kΩ Maximum Lead Resistance (4-wire Ω) ....2.5 % of range per lead for 400 Ω and 4 kΩ ranges Sample Rate Slow ..............10 PLC Medium ............... 2 PLC Fast ..............1 PLC 1-19 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 27: Rtd Temperature Accuracy

    2638A Users Manual RTD Temperature Accuracy Accuracy is for 4-wire 100 Ω nominal RTD, using the slow sample rate. With 3-wire PRT/RTD add 0.015 °C if using Channel 1, or add 0.15 °C internal resistance mismatch to the accuracy specification if using channels x01 through x20, and add external lead wire resistance mismatch.

  • Page 28: Thermistor Measurement Characteristics

    0.17 °C 0.25 °C 1.42 °C 0 °C 0.07 °C 0.10 °C 0.61 °C -270 °C to 1000 °C 300 °C 0.06 °C 0.09 °C 0.46 °C 700 °C 0.08 °C 0.10 °C 0.45 °C 1-21 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 29: Thermocouple Measurement Characteristics

    2638A Users Manual 300 °C 1.32 °C 1.97 °C 1.97 °C 600 °C 0.68 °C 1.02 °C 1.02 °C 100 °C to 1820 °C 1200 °C 0.41 °C 0.60 °C 0.60 °C 1600 °C 0.38 °C 0.55 °C 0.55 °C 600 °C...

  • Page 30: Trigger

    Product Overview and Specifications 2638A-100 Universal Input Module Trigger Absolute Voltage Range ......... -4 V to 30 V Minimum Logic High ..........2.0 V Maximum Logic Low ..........0.7 V Minimum Pulse Width ..........50 µs Maximum Latency ........... 100 ms Alarm Output Absolute Voltage Range .........

  • Page 31: Initial Setup And Configuration

    See Chapter 6 for instructions on how to change the fuse. Each voltage selection requires a specific fuse. See Table 2-1. Table 2-1. Fuses Voltage Selector Fuse Fluke Calibration Part Number 100 V 0.25 A, 250 V (slow blow) 166306 120 V 0.25 A, 250 V (slow blow)

  • Page 32: Fuse Replacement And Line-Voltage Selection

    2638A Users Manual hce016.eps Figure 2-1. Fuse Replacement and Line-Voltage Selection Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 33: Connect To Mains Power

    WCaution To prevent damage to the Product, make sure the regional voltage selector is in the correct position for the region of use before mains power is connected. hcn051.eps Figure 2-2. Mains Power Cord Connection Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 34: Set The Handle Position

    2638A Users Manual Set the Handle Position The handle is used to easily transport the Product but can also be used as a stand. Figure 2-3 shows the various handle positions and also shows how to remove and install the handle and the protective rubber boots.

  • Page 35: Power On And Standby

    When in standby, the display, keys, and functions are disabled while the internal components remain powered on and warmed up (see “Warm-Up the Product”). Main Power Switch Standby Key hcn042.eps Figure 2-4. Main Power Switch and Standby Key Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 36: Warm-Up The Product

    2638A Users Manual Warm-Up the Product It is recommended that the Product be warmed up before use to stabilize the environmentally controlled components. This will ensure the best performance to the specification listed in Chapter 1. Sufficient warm-up times are as follows: •...

  • Page 37: Input Module And Relay Card Installation

    The 2638A/05 has only one available relay slot. Do not remove the cover plates on slots 2 and 3. This will damage the Product and require a return for service.

  • Page 38: Module Indicator Example

    2638A Users Manual To install the Input Module: 1. Power off the Product with the main power switch. 2. Slide an Input Module into the slot the relay card was installed. 3. Power on the Product with the main power switch.

  • Page 39: Relay Card Installation

    Initial Setup and Configuration Input Module and Relay Card Installation hcn037.eps Figure 2-6. Relay Card Installation Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 40: Set Up Security

    To protect the Product from accidental or unintentional changes to the calibration coefficients. The Admin profile is the only profile that can open the Calibration menu to calibrate the Product. Refer to the 2638A Calibration Manual for calibration and adjustment instructions.

  • Page 41: Input And Channel Configuration

    Note To expand the functionality of the Product, current sources can also be connected to channels ChX01 through ChX20 by the use of an accessory shunt resistor. See Chapter 6 for part number and ordering information. Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 42: Wiring Safety And Considerations

    2638A Users Manual 2-Wire Connection 3-Wire or 4-Wire Connection Note: For 3-Wire connections, leave the H sense open. 2-Wire Connection 3-Wire or 4-Wire Connection hcn024.eps Figure 3-1. 2-Wire, 3-Wire, and 4-Wire Example Connections Wiring Safety and Considerations WXWarning To prevent possible electrical shock, fire, or personal injury: •...

  • Page 43: 3-Wire And 4-Wire Sense Input Configuration

    Procedures” on page 3-7. When a channel is configured as a 3-wire or 4-wire input, the Product automatically reserves the sense channel across from the source that prevents the channel from being independently configured, as shown in Figure 3-2. Fluke-Direct .com info@Fluke-Direct.com...

  • Page 44: Wire And 4-Wire Channel Reservation

    2638A Users Manual Sense wires connected directly across from source on Channel 116. Source on Channel 106. Note: For 3-Wire connections, leave the H sense open. 3-Wire or 4-Wire Function Channel Reserved hce026.eps Figure 3-2. 3-Wire and 4-Wire Channel Reservation Fluke-Direct .com...

  • Page 45: Input Types And Wiring Diagrams

    [1] − Each Input Module has two terminal sets (mA 21 and mA 22) that are dedicated to current measurements. [2] − 300 V is for Ch001 only. Other analog channels are 150 V max. Ω Ω [3] − 100 M is for Ch001 only. Other analog channels are 10 M Max. Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 46: Input Wiring Instructions

    2638A Users Manual Input Wiring Instructions Use the procedure below and refer to Figure 3-1 for instructions on how to wire a 2-wire, 3-wire, or 4-wire input to the Input Module. WXWarning To prevent possible electrical shock, fire, or personal injury, read the Wiring Safety and Considerations section on page 3-2.

  • Page 47: Channel Configuration

    • A thermistor source is connected to input terminal 8 (08) in the Input Module and then slid into slot 2. The channel is Ch208. • A voltage source is connected to the front-panel terminals. The channel is Ch001. Table 3-2 shows channel types and channel numbers. Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 48: Channel Types And Numbers

    Ch102 to Ch322)” on page 3-16. Channels 201 to Ch222 and Ch301 to Ch322 are not Input Channel (rear panel, slot 2) Ch201 to Ch222 available on 2638A/05. Input Channel (rear panel, slot 3) Ch301 to Ch322 See “Digital I/O Channel Configuration...

  • Page 49: Example Channel Assignment

    Channel 001 Channel: 104 Input Module Rear-Panel Slot Terminal Number hce014.eps Figure 3-4. Example Channel Assignment Note Channels 201 to 222 and 301 to 322 and relay slots 2 and 3 are not available on 2638A/05. Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 50: Basic Channel Operations

    2638A Users Manual Basic Channel Operations Use the instructions in this section to perform basic channel operations. Open the Channel Setup Menu The Channel Setup menu lets the user manage channels, verify inputs, and also set up  tests. To open the menu, push on the front panel.

  • Page 51: Set Channels To On Or Off

    To change the or edit the channel:  1. Push 2. Push  or  to highlight a channel. 3. Push  to edit the channel. 4. Set the Channel Status to ON if necessary. 3-11 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 52: Verify A Channel

    2638A Users Manual The display opens a channel configuration sequence that prompts the user to select key parameters for the specific channel type. These sequences are shown and described in the analog channel configuration section that starts on page 3-16.

  • Page 53: Copy A Channel

    Confirm the channel selections before OK is pushed to prevent accidental overwrites. To duplicate a channel with copy and paste: . 1. Push 2. Push  or  to highlight a channel. 3-13 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 54: Save Or Load A Channel Configuration (Setup File)

    2638A Users Manual 3. Set the channel to ON if necessary. 4. Push  to open the Copy Channel menu. 5. Use  or  to highlight a channel then push  to select the channels to paste to. 6. Push  to paste the channels.
  • Page 55 5. Use the  and  keys to select the file to be copied. 6. Push  to manage the file. 7. Push  to copy to the internal memory. Note Do not remove the USB drive until you see a file transfer complete message. 3-15 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 56: Reset The Channel And Test Configuration

    2638A Users Manual Reset the Channel and Test Configuration To reset the entire channel configuration and test setup: Note All channels are set to the default settings when reset and cannot be restored unless the configuration was saved.  1. Push and hold for 3 seconds.

  • Page 57: Current And Voltage Channels

    Input a custom alpha-numeric label to help identify the channel (optional).  Set an alarm for this channel (optional). See “HI and LO Channel Alarms” on page 3-30.  Apply Mx+B scaling to the measurement (optional). See “Mx+B Scaling” on page 3-29.  3-17 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 58: Resistance Channels

    2638A Users Manual Resistance Channels Refer to Table 3-5 to configure a resistance channel. Table 3-5. Resistance Channel Configuration hce020.eps Item Function Resistance function selection.  Set up the channel for a 2-wire or 4-wire resistance measurement connection. See “Sense Input ...

  • Page 59: Thermocouple Channels

    Input a custom alpha-numeric label to help identify the channel (optional).  Set an alarm for this channel (optional). See “HI and LO Channel Alarms” on page 3-30.  Apply Mx+B scaling to the measurement (optional). See “Mx+B Scaling” on page 3-29.  3-19 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 60: Frequency Channels

    2638A Users Manual Frequency Channels Refer to Table 3-7 to configure a frequency channel. Table 3-7. Frequency Channel Configuration hce044.eps Item Function Frequency function selection.  Input a custom alpha-numeric label to help identify the channel (optional).  Set an alarm for this channel (optional). See “HI and LO Channel Alarms” on page 3-30.

  • Page 61: Thermistor Channels

    Input a custom alpha-numeric label to help identify the channel (optional).  Set an alarm for this channel (optional). See “HI and LO Channel Alarms” on page 3-30.  Apply Mx+B scaling to the measurement (optional). See “Mx+B Scaling” on page 3-29.  3-21 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 62: Prt Channels

    2638A Users Manual PRT Channels Refer to Table 3-9 to configure a Platinum Resistance Thermometer (PRT) channel. Table 3-9. PRT Channel Setup hce023.eps Item Function PRT function selection.  Select the PRT type. Types available: PT-385 and PT-392  Set the PRT resistance value at 0 °C.

  • Page 63: Digital I/O (Dio) Channel Configuration (Ch401)

    “Digital I/O” in Chapter 1. The DIO channel will be read-only when it is set to ON (active). With a remote command, the Product can output an 8-bit TTL value. See the 2638A Remote Programmers Guide for more information. Terminal Function...

  • Page 64: Totalizer Channel Configuration (Ch402)

    2638A Users Manual 3. Set channel 401 to ON (see “Set Channels to ON or OFF” on page 3-11). 4. Assign a label to the channel if desired. 5. To measure the DIO, monitor channel Ch401 in the Scan/Monitor menu. The 8-bit TTL value is shown on the display and the decimal equivalent will be recorded to the data file.

  • Page 65: Totalizer Channel Configuration

    Input a custom alpha-numeric label to help identify the channel (optional).  Read mode selection. See “Read Mode” on page 3-24.  Set the Debounce feature to ON or OFF. See “Debounce” on page 3-24.  3-25 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 66: Math Channel Configuration (Ch501 To Ch520)

    2638A Users Manual Math Channel Configuration (Ch501 to Ch520) The Product has 20 math channels that lets the user apply a math conversion to a single channel or to a range of channels through the use of preset math functions. Table 3-11 lists the math functions available for use.
  • Page 67 3. Use the information in the Table 3-12 to configure the math channel. Push  or  to highlight the channel setting then push  to edit the setting. 3-27 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 68: Math Channel Configuration

    2638A Users Manual Table 3-12. Math Channel Configuration hce043.eps Item Function Math formula selection.  Channel selection for the first base channel “A”.  Channel selection for the second base channel “B”. Note  Only channels “A” and “B” are shown in the example because the sum math formula only combines two channels.

  • Page 69: Mx+B, Alarms, And Channel Options

    When a channel has Mx+B scaling applied, a [Mx+B] icon is shown above the unit next to the measurement value. Note If the scaled value is too large, "OL" (overload) is displayed. Adjust the gain or the offset and try again. 3-29 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 70: Hi And Lo Channel Alarms

    2638A Users Manual The Product uses the offset to zero a channel. To do this, the Product calculates the offset required to convert the measurement to a zero value, sets Mx+B to ON, and loads the calculated offset value into the Mx+B settings. To clear the zero, the offset value can be manually set back to the original value (usually “0”) or Mx+B can be set to OFF if it was...

  • Page 71: Rear-Panel Alarm Outputs

    Monitor Screen Alarm output 3 low limit set to 2 V dc Rear View Lower-limit exceeded, alarm output 3 outputs <0.7 V dc = Low Condition (<0.7 V dc) hcn035.eps Figure 3-10. Alarm Output Example 3-31 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 72: Channel Delay

    2638A Users Manual Channel Delay A channel delay is a measurement time delay that can be individually assigned to each channel to delay the measurement. Channel delays can be used for various applications, but they are most useful in applications where the source impedance or circuit capacitance is high.

  • Page 73: Nplc

    This setting is used to set the display to show temperature or the mV equivalent for thermocouple channels. Open Detect This setting enables the Product to automatically detect an open circuit in the probe. This setting only shows in a thermocouple channel. 3-33 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 74: Scan/Monitor, Record, And Data

    (see Figure 4-4). After a scan is stopped, this scan data stays in temporary memory and remains available until a new scan is started. Fluke-Direct .com info@Fluke-Direct.com...

  • Page 75: The Scan Menu

    2638A Users Manual hcn038.eps Figure 4-1. Scan Data The Scan menu lets the user control the scan and view the scan data. The Scan menu also shows important status indicators to quickly inform the user of the scan status and progress of the scan.

  • Page 76: About Scan Timing And Sampling

    • In some conditions, it may be necessary to add channel delay to allow for longer settling times. See “Channel Delay” in Chapter 3 for more information. Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 77: Settling Time Delay Values

    2638A Users Manual • The total channel sample time is the minimum sample time plus the user- programmed channel delay. The longer the channel delay, the longer it takes to sample the channel. • The total scan sweep time is sum of the channel sample times of all the channels scanned.

  • Page 78: Configure A Scan

    Scans are configured in the Test Setup menu that is opened in the Channel Setup menu (push then push ). This section contains information on each parameter in the  Test Setup menu to help configure the scan. Figure 4-3 shows the Test Setup menu. Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 79: Trigger Type

    2638A Users Manual hcn032.eps Figure 4-3. Test Setup Menu Example Trigger Type The Trigger Type tells the Product when and how to start and stop a scan. There are four trigger types: Note If a Scan Count of 0 is set or if the scan interval is shorter than the scan sweep time, the scan continuously repeats until the scan is stopped or the Product runs out of memory.

  • Page 80: Auto Recording

    Sample Rate should not be confused with Channel Delay and Rate of Change in the advanced channel options. See “Scan Sweep” for more information. The four Sample Rates are: Fast, Medium, Slow, and Custom. Table 4-3 shows the sample speeds for the different input types and ranges. Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 81: Data Security

    2638A Users Manual Table 4-3. Scan Sample Rates Sample Time (s) Functions Fast Medium Slow DC Current DC Voltage 0.2 PLC 1 PLC 10 PLC Resistance AC Current Fixed to 10 PLC AC Voltage Frequency Fixed to 1 PLC Thermocouple...

  • Page 82: Temperature Unit

    5. Use  and  to highlight a channel then push  to set. Multiple channels can be selected to align. 6. Push  to align the channels. The Product will take measurements on the reference channel and selected channels, then use Mx+B function to align these channels to the reference. Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 83: Automatic Power Loss Scan Resume

    2638A Users Manual Automatic Power Loss Scan Resume In the event that the Product experiences a loss of mains power while a scan is in progress, it can be configured to resume the scan when mains power comes on. This feature is referred to as “Power Loss Resume State”.

  • Page 84: View Scan Data And Statistics

    If an alarm is tripped, the alarm number will show next to the channel as a red icon and also the measurement value will be red. See Figure 4-4. hcn055.eps Figure 4-4. Scan Data 4-11 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 85: Graph The Measurements

    2638A Users Manual Table 4-4. Scan Statistics Statistic Description Maximum Maximum measurement. Minimum Minimum measurement. Average Average of all the measurements taken. A measure of the distribution of a set of data from its mean. The more spread Standard Deviation apart the data, the higher the deviation.

  • Page 86: Monitor

    1. Set all channels to be scanned to ON. See “Set Channels to ON or OFF” in Chapter 3. 2. Push . 3. Push  to open the Monitor menu. The first active channel is displayed. 4. Push  or  to switch between channels. 4-13 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 87: Record

    2638A Users Manual Record The Record function saves the scan or DMM measurement results to a file that can be transferred to a PC for further evaluation. When the Product is recording data, the Record key is illuminated and “RECORDING” shows on the top of the display. Data is recorded for as long as the key is illuminated and “RECORDING”...

  • Page 88: Memory Consumption For Recorded Data

    5. Navigate to the data folder as follows (see Figure 4-8 for an example of the folder structure): a. Double-click on the fluke folder. b. Double-click on the 2638A folder. c. Double-click on the serial number of the Product used to record the data. In the example, 12345678 is the serial number of the Product.

  • Page 89: Scan Data File Name Convention

    2638A Users Manual d. Double-click on the data folder. e. Double-click on the scan folder to see scan data files or the DMM folder to see DMM data files. The data files are saved within a folder that was named with a timestamp of when the scan or measurement was recorded.

  • Page 90: How To Read The Setup Csv File

    Operator. Instrument Information This section of the spreadsheet shown below contains general information on the Product such as the serial number and last calibration date. This section also shows the Input Module configuration used. 4-17 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...
  • Page 91 2638A Users Manual Analog Channels This section of the spreadsheet shown below contains configuration information on each analog channel that was recorded. Digital Channels This section of the spreadsheet shown below contains configuration information for the DIO channel and the TOT channel.

  • Page 92: How To Read The Data Csv File

    To see how the test and channels were configured, view the information in the setup.csv file (see “How to Read the Setup.csv File”). All measurements can easily be toggled to engineering notation with the cell formatting options within Microsoft Excel. An example of the spreadsheet is shown below. 4-19 Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 93: Dmm Operation

    For example, use of the DMM feature does not automatically configure and set channel 001 to ON in the Channel Setup menu. Figure 5-1 shows an example of a front-panel input configuration. hce025.eps Figure 5-1. Example Voltage Front-Panel Connection Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 94: Input Type Selection And Range Adjustment

    2638A Users Manual Input Type Selection and Range Adjustment The DMM menu has four softkeys available to select and configure the front-panel inputs for the measurement type. After a softkey is pushed, the user is prompted for additional input information to fully configure the input. To adjust the range of the measurement after the input is configured, push the and...

  • Page 95: Graph The Measurements

    Live Mode  Move Right (in History Mode) Time Stamps Toggle Grid Manually change the Scale hcn048.eps Figure 5-4. Graph Function To see the measurement data in a graph: 1. Push  2. Configure the input. Fluke-Direct .com info@Fluke-Direct.com 1.888.475.5235...

  • Page 96: Measurement Statistics

    2638A Users Manual 3. Push  to show the channel options. 4. Push  to show the graph. Use  and  to zoom in and out. To see historical data, push  to switch between History Mode and Live Mode. When in History Mode, use ...

  • Page 97: Maintenance And Care

    To prevent possible electrical shock, fire, or personal injury, use only specified replacement parts. Table 6-1. Fuses Voltage Selector Fuse Fluke Calibration Part Number 100 V 0.25 A, 250 V (slow blow) 166306 120 V 0.25 A, 250 V (slow blow)

  • Page 98: Memory Reset And Factory Reset

    2638A Users Manual hce016.eps Figure 6-1. Fuse Replacement Memory Reset and Factory Reset The Product has two memory reset functions to remove data from the memory and to reset the Product: Clear all Files and Factory Reset. See Table 6-2 for a comparison of the three functions.

  • Page 99: Firmware Update

    For Products with a firmware version 1.03 or higher, firmware may be updated by the product administrator with the front-panel USB port. New firmware versions are available from the Fluke Calibration web page for the Product under the Knowledge and Information tab.
  • Page 100 Firmware update steps: 1. Download and extract the firmware update files (AuxInfo.txt and mtv.flt) to your computer from the Fluke Calibration website. 2. Create a new folder “firmware” on a USB flash drive (1 GB or greater), and then copy these files into this folder. To prevent file corruption, use the Windows utility to safely eject your USB flash drive from your computer.

  • Page 101: User-Replaceable Parts And Accessories

    Fuse 0.25A, 250V (slow blow) 4394437 W Fuse 0.160 mA, 250V (slow blow) 4410418 Relay Card 4410452 2638A-100 Universal Input Module Notes: [1] – Quantity of items listed can vary based on kit or model ordered. [2] – Only use exact replacements. Fluke-Direct .com info@Fluke-Direct.com...

  • Page 102: Error Messages And Troubleshooting

    Cause 2: Screen saver activated. Solution 2: Press any front panel key to exit the screen saver. Cause 3: Screen or unit is malfunctioning. Solution 3: Contact Fluke Calibration. See Chapter 1. Input Module is not Cause 1: Input Module not fully seated.

  • Page 103: Troubleshooting

    2638A Users Manual Table 7-2. Troubleshooting Chart (cont.) Problem Causes and Solutions Cannot read USB drive. Cause 1: USB drive not installed properly. Solution 1: Make sure the USB drive is fully inserted. The LED light will illuminate in less than 30 seconds.

Table of Contents