Fluke 1594A Technical Manual
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Fluke 1594A Technical Manual

Super-thermometer
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1594A/1595A
Super-Thermometer
Technical Guide
159X____tgeng0000

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Summary of Contents for Fluke 1594A

  • Page 1 1594A/1595A Super-Thermometer Technical Guide 159X____tgeng0000...
  • 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 avail- able if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable interna- tional price.

  • Page 3: Table Of Contents

    Table of Contents Before You Start ..................1 Symbols Used ......................1 Safety Information ......................1 1.2.1 WARNINGS ........................1 1.2.2 CAUTIONS ........................2 Authorized Service Centers ..................2 Introduction and Specifications ............5 Introduction ........................5 Specifications ......................5 2.2.1 General ..........................5 2.2.2 Primary Specifications.......................6 2.2.2.1 Resistance Ratio Accuracy.......................6 2.2.2.2 Resistor Stability ........................6...
  • Page 4 1594A/1595A Super-Thermometer 4.3.5 Earth Ground Connection ....................22 Menus and Screens ................23 Introduction ......................23 Changing Settings ....................23 Password Protection ....................24 Menu Navigation ......................24 Menu System ......................24 Measurement Screen ....................25 5.6.1 Channel Measurement Display ..................26 5.6.2 Channel Summary Section ....................26 5.6.3 Statistics Fields .......................27 5.6.4 Data/Graph Section ......................27...
  • Page 5 User Settings Screen ....................57 Connecting a Probe or Resistor ................58 Making Measurements ............... 61 Introduction ......................61 Measuring a Temperature Probe ................61 Scanning Multiple Temperature Probes ..............62 Measuring Resistance Ratio ..................62 Configuring an External Reference Resistor ............62 Making A Zero-Power Measurement ...............63 Remote Operation ................
  • Page 6 1594A/1595A Super-Thermometer 8.7.3.24 CALC<n>:DELT:DATA? ......................80 8.7.3.25 CALC:DELT:MODE OFFS|CHAN .....................80 8.7.3.26 CALC:DELT:OFFS <value> .....................80 8.7.3.27 CALC<n>:TYPE TEMP|RES|RAT .....................80 8.7.3.28 DATA:REC:ALL <boolean> .....................80 8.7.3.29 DATA:REC:FILE <name> ......................81 8.7.3.30 DATA:REC:MEM INT|USB|BOTH .....................81 8.7.3.31 DATA:REC[:STAT] <boolean> ....................81 8.7.3.32 DISP:ALER:CLEA ........................81 8.7.3.33 DISP:ALER[:READ]? .......................81 8.7.3.34 DISP:DATE:FORM YMD|DMY|MDY ..................81 8.7.3.35 DISP:DEC:FORM PER|COMM ....................81...
  • Page 7 8.7.3.80 SENS:APER[:DISP] <time> .....................92 8.7.3.81 SENS:APER:PRES NORM|PREC|FAST|LONG ................92 8.7.3.82 SENS:APER:SAMP <time> .....................92 8.7.3.83 SENS:AVER1[:STAT] <boolean> .....................92 8.7.3.84 SENS:AVER2[:STAT] <boolean> .....................93 8.7.3.85 SENS:AVER2:COUN <count> ....................93 8.7.3.86 SENS:AVER2:CLEA .........................93 8.7.3.87 SENS[<n>][:FRES]:DATA? ......................93 8.7.3.88 SENS[<n>]:RRAT:DATA? ......................93 8.7.3.89 STAT:OPER? ..........................94 8.7.3.90 STAT:OPER:COND? ........................94 8.7.3.91 STAT:OPER:ENAB <value>...
  • Page 8 1594A/1595A Super-Thermometer 8.7.3.136 TEST:LIN[:STAT]? ........................101 8.7.3.137 TEST:LIN:TIME? ........................101 8.7.3.138 TEST:LIN:TOL<n>? .......................102 8.7.3.139 TEST:SYST:ABOR ........................102 8.7.3.140 TEST:SYST:INIT ........................102 8.7.3.141 TEST:SYST:REP[<n>]? ......................102 8.7.3.142 TEST:SYST:STAT? ........................102 8.7.3.143 UNIT:TEMP C|K|F ........................102 Calibration ..................103 Introduction ......................103 SYSTEM TEST (F1) ....................103 CURRENT TEST (F2) .....................103 RATIO CALIBRATION (F3) ..................104 9.4.1 WRITE FILE (F1) ......................106...
  • Page 9 Figures Figure 1 PEM (Power Entry Module) .................16 Figure 2 Front view ......................17 Figure 3 Front Panel Display .....................19 Figure 4 Rear view ......................20 Figure 5 External Resistor Inputs ..................20 Figure 6 Power Entry Module ...................22 Figure 7 Location Descriptor Example ................23 Figure 8 Alpha-Numeric Interface ..................23 Figure 9 Measurement Screen ..................26 Figure 10 Channel Setup Screen ..................29...
  • Page 10 1594A/1595A Super-Thermometer Tables Table 1 Symbols ........................1 Table 2 Resistance Ratio Accuracy Specifications ............6 Table 3 Resistor Stability Specifications ................7 Table 4 Absolute Resistance Accuracy Specifications ............7 Table 5 Measurement Current Accuracy Specifications.............8 Table 6 Temperature Measurement Noise Specifications...........8 Table 7 Relative Measurement Current Specifications ............8 Table 8 General Specifications ...................9 Table 9 Optional Accessories ...................15 Table 10 Front panel key descriptions ................18...

  • Page 11: Before You Start

    Before You Start Safety Information 1 Before You Start 1.1 Symbols Used Table 1 lists the symbols that may be used on the instrument or in this manual and the meaning of each symbol. Table 1 Symbols Symbol Description Symbol Description AC (Alternating Current) PE Ground...

  • Page 12: Cautions

    DO NOT connect AC voltage to any input terminal on the instrument. Permanent damage to the ● ● instrument will result. 1.3 Authorized Service Centers Please contact one of the following authorized Service Centers to coordinate service on your Fluke product: Fluke Corporation 799 E. Utah Valley Drive American Fork, UT 84003-9775 Phone: +1.801.763.1600 Telefax: +1.801.763.1010...
  • Page 13 Before You Start Authorized Service Centers Fluke South East Asia Pte Ltd. Fluke ASEAN Regional Office Service Center 60 Alexandra Terrace #03-16 The Comtech (Lobby D) 118502 SINGAPORE Phone: +65 6799-5588 Telefax: +65 6799-5588 E-mail: antng@singa.fluke.com When contacting these Service Centers for support, please have the following information available: Model Number ●...

  • Page 15: Introduction And Specifications

    The Fluke 1594A and 1595A Hart Super-Thermometers continue this legacy adding new patent pending measurement technology and features that truly are best in class. Below is a summary of key capabilities and features.

  • Page 16: Primary Specifications

    1594A/1595A Super-Thermometer Specifications Primary Specifications: the core set of measurement accuracy specifications of the Super-Thermometer. They are guaranteed for performance verification at the 99% confidence level. Ancillary Specifications: additional specifications that help the user understand more of the uncertainties involved in measurement. Since they may be subject to the application and setting in which the Super-Ther- mometer is used, they are not guaranteed for performance verification but should be considered typical.

  • Page 17: Absolute Resistance Accuracy

    Introduction and Specifications Specifications Table 3 Resistor Stability Specifications Resistor (Rs) Accuracy (ppm of reading), 95 % confidence level 24 hours 30 days 1 W 5 ppm 10 ppm 10 W 0.5 ppm 2 ppm 25 W 0.25 ppm 1 ppm 100 W 0.2 ppm 1 ppm 10 kW 0.25 ppm...

  • Page 18: Ancillary Specifications

    1594A/1595A Super-Thermometer Specifications Table 5 Measurement Current Accuracy Specifications Current Range Accuracy 99% confidence level, 1-year 0.001 mA to 0.005 mA 0.00005 mA 0.005 mA to 0.02 mA 0.02 mA to 0.2 mA 0.5 % 0.2 mA to 2 mA 0.2 % 2 mA to 20 mA 0.5 %...

  • Page 19: General Specifications

    Introduction and Specifications Specifications 2.2.4 General Specifications Table 8 General Specifications Warm-up period 30 minutes Measurement range 0 W to 500 kW Measurement current range 0.001 mA to 20 mA Measurement current reversal interval: Sample period of 1 second or 2 seconds 0.2 second Sample period of 5 second or 10 seconds 1.2 second...

  • Page 20: Example 1: Measuring An Sprt

    1594A/1595A Super-Thermometer Specifications When calibrating an SPRT on the ITS-90, the W value is measured at required fixed-point temperatures. This is done by measuring the resistance of the SPRT at a fixed-point temperature followed immediately by measurement of the RTPW. This is repeated for each temperature point. Once again the ratio accuracy of the Super-Thermometer, applied to each measured resistance, determines the accuracy of the resulting W value.
  • Page 21 Introduction and Specifications Specifications is converted to temperature by dividing 0.03 ppm by 1.0 × 10 and then multiplying by 1.02. The result is then sensitivity, dW/dT, at 0.01 °C, which is 0.004. The final result is 0.000008 °C. After multiply- divided by W ing by W (1.612), the uncertainty of the RTPW resistance ratio, when applied to 157 °C, is 0.000013 °C.

  • Page 22: Example 2: Calibrating An Sprt

    1594A/1595A Super-Thermometer Specifications of the SPRT at 157 °C which is 0.1 Ω/°C (see tip above). This results in a standard temperature uncertainty of 0.001028 °C. 2.2.5.3.11 Measurement Noise at 157 °C During measurement at 157 °C, the standard error of the mean (as reported by the 1595A) is observed to be 0.00004 °C.

  • Page 23: Example 4: Measuring A 100 Ω Prt

    Introduction and Specifications Specifications 2.2.5.4.2 Example 3: Measuring Zero-Power Resistance The purpose of this example is to demonstrate how the Relative Current specification applies when performing a zero-power measurement. The zero-power uncertainty calculated in this example would be added to the rest of the uncertainties involved in the measurement as explained in previous examples.

  • Page 24: Example 5: Measuring A 10 Kω Thermistor

    1594A/1595A Super-Thermometer Specifications 257 Ω. Divide the result by the sensitivity of the PRT (dR/dT) at 420 °C. This can be found in the PRT calibra- tion report. For this example, 0.4 Ω/°C is used. The resulting uncertainty is 0.0013°C. 2.2.5.5.2 Measurement Noise at 420 °C The noise of the measurement at 420 °C is observed using the Standard Error of the Mean statistic field of the...

  • Page 25: Preparation For Operation

    Super-Thermometer. It also includes instructions for remote operation, calibration and mainte- nance. The Technical Guide is available in English only. For ordering a replacement instruction manual DVD contact your local Fluke representative or service center. All manuals are available online for download in PDF format.

  • Page 26: Connecting To Line Power

    1594A/1595A Super-Thermometer Connecting to Line Power 1. Disconnect line power. 2. Observe what line voltage setting is displayed in the PEM window. If it is correct, the fuse assembly will be re-inserted in the same orientation it is removed. Otherwise, it will need to be rotated 180° before re-insertion.

  • Page 27: Front And Rear Panel Features

    Front and Rear Panel Features Front Panel Features 4 Front and Rear Panel Features 4.1 Introduction The Super-Thermometer has been designed with several features that help make setup and operation as simple as possible while still providing many measurement capabilities. This section describes the front and rear panel features as well as the menu system.

  • Page 28: Front Panel Keys

    1594A/1595A Super-Thermometer Front Panel Features 4.2.3 Front Panel Keys Table 10 Front panel key descriptions The Power Standby key turns off the display and disables the front panel keys, sending the system into standby. Power remains applied to some internal components such as the resistor oven.

  • Page 29: Front Panel Display

    Front and Rear Panel Features Front Panel Features 4.2.3.1 Front Panel Display The Front Panel Display is shown in Figure 3. The display screen is used to show all measurements, menus and configuration information. Figure 3 Front Panel Display The default display language is English. The display can be shown in the following language options: English, Chinese, Spanish, Japanese, German, French, and Russian.

  • Page 30: Rear Panel Features

    1594A/1595A Super-Thermometer Rear Panel Features 4.3 Rear Panel Features Figure 4 Rear view 4.3.3.1 External Resistor Inputs Figure 5 External Resistor Inputs The Rs1 and Rs2 external reference resistor connections are located on the rear panel. The Current (C1, C2), Potential (P1, P2) and Guard (G) terminals are labeled to facilitate proper connection (see Figure 16 on page 58).

  • Page 31: Future Peripheral Connection

    Front and Rear Panel Features Rear Panel Features 4.3.2 Future Peripheral Connection A USB peripheral port is intended for future peripheral control. Note: This port is NOT used for external memory connection. For external memory via USB see Section 4.2.2, USB Connection, on page 17 and Figure 2 on page 17. 4.3.3 Remote Operation Connections The Super-Thermometer comes equipped with several remote operation connections.

  • Page 32: Line Voltage Connection

    1594A/1595A Super-Thermometer Rear Panel Features 4.3.4 Line Voltage Connection Figure 6 Power Entry Module The PEM (Power Entry Module) located on the rear panel connects the Super-Thermometer to line voltage. It contains the Line Voltage Power Switch, the Line Voltage Fuses, and the Line Voltage Selector. See the Line Voltage and Fuses section for configuration and connection instructions.

  • Page 33: Menus And Screens

    Menus and Screens Changing Settings 5 Menus and Screens 5.1 Introduction This section provides detailed description of the Super-Thermometer menus and screens. The menus and screens are designed to allow the user to quickly and easily set up the instrument for measurement while also providing many configuration options.

  • Page 34: Password Protection

    1594A/1595A Super-Thermometer Password Protection In the Alpha-Numeric Interface, use the front panel arrow keys to move the cursor to the desired character. Press the ENTER key to enter the selected character in the text edit box. Numeric characters can be entered using the Alpha-Numeric Interface or the front panel digit keys.

  • Page 35: Measurement Screen

    Menus and Screens Measurement Screen READ RESISTOR MANAGE RESISTORS READ FILE WRITE FILE MOVE UP MOVE DOWN DELETE RESISTOR ON/OFF MEASURE MENU (see MEASURE MENU below) PROBE MENU ADD PROBE COPY PROBE EDIT PROBE TEST CALCULATION READ PROBE MANAGE PROBES READ FILE WRITE FILE MOVE UP...

  • Page 36: Channel Measurement Display

    1594A/1595A Super-Thermometer Measurement Screen or by pressing and releasing the MENU key then pressing the EXIT key. The following describe each section of the Measurement Screen. Figure 9 Measurement Screen The following are the different sections of the Measurement Screen (see Figure 9) followed by detailed de- scriptions of each section: A.

  • Page 37: Statistics Fields

    Menus and Screens Measurement Screen OVEN - indicates whether the resistor oven is stable and ready for measurement. After power up, the OVEN field will first indicate “SETTLING” while the oven warms up and settles to the proper temperature. When the oven temperature is stable, the field will display “READY”...

  • Page 38: Start/Stop Measurement (F1)

    1594A/1595A Super-Thermometer Main Menu 5.6.6 START/STOP MEASUREMENT (F1) The Start/Stop Measurement function key is a toggling function key that starts and stops measurement sampling. 5.6.7 SHOW TABLE/GRAPH (F2) The Show Table/Graph function key toggles the display between Graph mode and Data mode. 5.6.8 RESET STATISTICS (F3) The Reset Statistics function key resets all statistics fields and sample counts.

  • Page 39: Channel Setup (F1)

    Menus and Screens Main Menu DISPLAY MENU - used to configure display settings, and statistics settings as well as selecting temperature measurement units SYSTEM MENU - used to configure the remote interface ports, set the system date and time, configure pass- word settings and calibrate the Super-Thermometer The following are detailed descriptions of each submenu and its contents.

  • Page 40: Channel Settings (F2)

    1594A/1595A Super-Thermometer Main Menu 5.7.1.2 CHANNEL SETTINGS (F2) MAIN MENU | CHANNEL SETUP | With the desired channel selected in the Channel Setup screen, pressing the Channel Settings function key opens a screen that allows the user to configure the channel settings. The channel that is being configured is identified at the top of the Channel Settings screen.
  • Page 41 Menus and Screens Main Menu 5.7.1.2.1 SET UP Rs (F1) MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | Pressing the Set Up Rs function key displays the Rs definition assigned to each Rs input. The Up/Down arrow keys are used to scroll through the list to select an Rs input for configuration. The following function keys al- low the user to configure the Rs input.
  • Page 42 1594A/1595A Super-Thermometer Main Menu 5.7.1.2.1.1.3 EDIT RESISTOR (F2) MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | DEFINE RESISTOR | The Edit Resistor function key opens the highlighted Rs definition for editing. The configuration fields are explained in the Add Resistor section above.
  • Page 43 Menus and Screens Main Menu write the file. If a USB memory device has not yet been inserted, the user is instructed to do so. Allow about 10 seconds for the system to recognize the USB device before continuning. Resistor definition files are written to a folder named “\159x\resistor” on the USB memory device and have the extension “.res”.

  • Page 44: Probe Menu (F2)

    1594A/1595A Super-Thermometer Main Menu 5.7.2 PROBE MENU (F2) MAIN MENU | Figure 11 Probe Menu Screen The Probe Menu contains the function keys needed for editing and managing probe definitions stored in the Probe Library. The Probe Library is non-volatile memory inside the Super-Thermometer which contains probe configura- tion information that is configured and stored by the user.

  • Page 45: Table 14 Probe Conversion Information

    Menus and Screens Main Menu CALIBRATION DATE - the calibration date of the probe. The digits may be set to zero if the date is undefined. NOMINAL CURRENT - the sensing current used for measuring the probe. The value entered is the current used to measure the probe when 1 x Power is selected in the Channel Settings screen.

  • Page 46: Copy Probe (F2)

    1594A/1595A Super-Thermometer Main Menu Type Conversion Coefficients Equations THERMISTOR R(T) POLYNOMIAL B0, B1, B2, B3     ∑ [ ] exp Ω =     °C 273 15     T(R) POLYNOMIAL A0, A1, A2, A3 °...

  • Page 47: Read Probe (F4)

    Menus and Screens Main Menu 5.7.2.4 READ PROBE (F4) MAIN MENU | PROBE MENU | The Read Probe function key allows the user to read a probe definition from the USB memory device into the Probe Library. When a USB memory device, that contains a probe definition file, is inserted in the front panel, the Read Probe screen displays a list of probe definition files (*.prb) found on the memory device.

  • Page 48: Measure Menu (F3)

    1594A/1595A Super-Thermometer Main Menu If the \159x\probe\ folder and .prb file have not been created previously, they will be created automatically when the file is written. If the .prb file already exists, a newly written probe definition will be appended into the file.

  • Page 49: Scan Settings (F1)

    Menus and Screens Main Menu The following are complete descriptions of each function key. 5.7.3.1 SCAN SETTINGS (F1) MAIN MENU | MEASURE MENU | Scan Settings is used to set up channel scanning. The Super-Thermometer has several scan options that are configured using the following fields.
  • Page 50 1594A/1595A Super-Thermometer Main Menu 41) if the digital filter is ON. If the digital filter is OFF, measurement samples are passed directly to Conversion. 4. Conversion - after filtering, the fundamental ratio measurement can be converted to the selected unit of measure such as Temperature (Section 5.7.2.3, EDIT PROBE (F3), on page 36).

  • Page 51: Digital Filter (F3)

    Menus and Screens Main Menu PRESET PRECISION (F2) - sets the timing settings for minimal measurement noise and settling error with most thermometer probes. Sample Period is set to 2 seconds, Display Interval is set to 10 seconds, and Aver- age Enable is set to ON.
  • Page 52 1594A/1595A Super-Thermometer Main Menu Important: Avoid switching power off to the Super-Thermometer while measurement and recording are in progress or recorded data may be lost. Measurements are recorded when the START RECORD (F5) function key in the Measurement screen has been pressed.

  • Page 53: Zero-Power Measurement (F5)

    Menus and Screens Main Menu READ FILE (F3) 5.7 .3.4.3 MAIN MENU | MEASURE MENU | RECORDING MENU | The Read File function key allows the user to view measurements that have been recorded in a file on the USB memory device.
  • Page 54 1594A/1595A Super-Thermometer Main Menu Tip: Zero-Power measurements must be performed in a very stable heat source so temperature drift does not interfere with the calculation. Zero-power measurement is performed by first measuring the probe at nominal current. Then the excita- tion current is automatically changed to 1.4142 times the nominal current.
  • Page 55 Menus and Screens Main Menu CHANNEL - the measurement channel PROBE - the ID of the probe TIME REMAINING - the amount of time left to complete the zero-power sequence of measurements in minutes and seconds (00:00) STEP - indicates the current measurement step of the sequence SENSING CURRENT - the sensing current implemented in the measurement step PHASE - indicates whether measurement is in SETTLING or MEASURING mode MEAN - the arithmetic mean of the measurements taken in the current step...

  • Page 56: Display Menu (F4)

    1594A/1595A Super-Thermometer Main Menu PROBE,<probe ID> ZERO_MEAS,<corrected measurement>,<unit> SELF_HEAT,<self heating>,<unit> STAN_ERR,<standard error>,<unit> DRIFT,<drift>,<unit> CURR_1,<current 1>,mA MEAN_1,<mean 1>,<unit> SDEV_1,<standard deviation 1>,<unit> CURR_2,<current 2>,mA MEAN_2,<mean 2>,<unit> SDEV_2,<standard deviation 2>,<unit> CURR_3,<current 3>,mA MEAN_3,<mean 3>,<unit> SDEV_3,<standard deviation 3>,<unit> Note: DRIFT is recorded only if Repeat Nominal is enabled. VIEW PREVIOUS (F2) - displays the most recent set of zero-power measurement data results 5.7.4 DISPLAY MENU (F4)

  • Page 57: User Settings (F1)

    Menus and Screens Main Menu 5.7.4.1 USER SETTINGS (F1) MAIN MENU | DISPLAY MENU | The User Settings screen allows the user to set preferences such as language, temperature measurement resolu- tion, screen saver settings and alert messages. The User Settings screen will automatically appear as the initial screen if the Start-up Help setting is enabled (see below).

  • Page 58: Field Settings (F2)

    1594A/1595A Super-Thermometer Main Menu When the User Settings screen appears after power-on, when the Start-Up Help setting is ON, the User Set- tings screen includes function key NEXT (F1). This key leads to the Time and Date Settings screen (see Sec- tion 5.7.5.1, TIME DATE (F1), on page 50), where the clock may be set to the local time.

  • Page 59: Statistics Settings (F3)

    Menus and Screens Main Menu 5.7.4.3 STATISTICS SETTINGS (F3) MAIN MENU | DISPLAY MENU | The Statistics Settings screen allows the user to set statistics related settings such as the statistics mode to be used. STATISTICS MODE – determines the mode in which statistics are used. The options are LIMITED and UNLIMITED.

  • Page 60: Temperature Unit (F5)

    1594A/1595A Super-Thermometer Main Menu TRACE - controls whether a measurement point is plotted with a line that connects to the previous point or as a separate dot. The options are LINE and DOT. The default value is DOT. Important: When Time Span is large, multiple points may be combined and drawn as a vertical line to conserve memory.

  • Page 61: Remote Interface (F2)

    Menus and Screens Main Menu DAYLIGHT SAVING - determines whether the clock is automatically adjusted at the beginning and end of the Daylight Saving period. Options are OFF, NORTH AMERICA, and EUROPE. The default option is OFF. 5.7.5.2 REMOTE INTERFACE (F2) MAIN MENU | SYSTEM MENU | The Remote Interface screen contains the function keys used for configuring and monitoring the remote inter- face ports.

  • Page 62: Config (F3)

    1594A/1595A Super-Thermometer Main Menu SUBNET MASK - specifies the network’s subnet mask when DHCP is OFF. Gateway and Subnet Mask are not available when DHCP is set to ON. HOST NAME - is a name that may be used to identify the Super-Thermometer on the network. It may consist of a combination of letters and digits, up to 16 characters in length.

  • Page 63: Recall Config (F2)

    Menus and Screens Main Menu 5.7.5.3.1 STORE CONFIG (F1) MAIN MENU | SYSTEM MENU | CONFIG | The Store Configuration function allows the user to store settings to a configuration file in either internal non- volatile memory or a USB flash memory device. The following settings are stored: The probe definition assigned to each channel ●...

  • Page 64: Delete Config (F3)

    1594A/1595A Super-Thermometer Main Menu 5.7.7 DELETE CONFIG (F3) MAIN MENU | SYSTEM MENU | CONFIG | The Delete Configuration function may be used to delete a configuration file in internal memory. The screen shows a list of configuration files found in the internal non-volatile memory. The user presses the Up/Down arrow keys to select one of the configuration files, then CONTINUE (F1) or ENTER to delete the file.

  • Page 65: Calibration (F5)

    The System Test function key is used to perform a system self-test. This tests various components of the Super-Thermometer and reports the results. If System Test indicates failures, contact the nearest Fluke Autho- rized Service Center. See Section 9.2, SYSTEM TEST (F1), on page 103 for more information.
  • Page 66 1594A/1595A Super-Thermometer Main Menu In the Calibration Parameters screen the user may view and change measurement calibration settings. The calibration parameters can be viewed with no password but a password is required to make changes. Calibration parameters include calibrated values for each of the internal resistors and the linearity coefficients for the resistance ratio measurements.

  • Page 67: Getting Started

    Getting Started User Settings Screen 6 Getting Started 6.1 Powering on the Super-Thermometer CAUTION: Before powering the Super-Thermometer on, ensure that the line voltage selection is set properly. Refer to Section 3.3, Line Voltage and Fuses, on page 15 for instructions. Power the Super-Thermometer on by setting the power switch located on the back panel to the On position.

  • Page 68: Connecting A Probe Or Resistor

    1594A/1595A Super-Thermometer Connecting a Probe or Resistor KEYPAD BEEP- enables (ON) or disables (OFF) the audio indication that accompanies each key-press. The default option is ON. START-UP HELP- determines whether the User Settings screen appears automatically after power-on. When the settings is ON the User Settings screen will appear every time the power is switched on. If the setting is OFF the Measurement screen will appear instead.
  • Page 69 Getting Started Connecting a Probe or Resistor The DWF connectors are labeled with C1, C2 (current connections) and P1, P2 (measurement potential con- nections). The guard connector is labeled with a “G” and is used for connecting to a probe or resistor guard or shield.

  • Page 71: Making Measurements

    Making Measurements Measuring a Temperature Probe 7 Making Measurements 7.1 Introduction The Super-Thermometer has been designed to allow quick and easy measurement setup while providing flex- ible measurement options. The purpose of this section is to guide the user through the configuration of the Super-Thermometer for typical measurements.

  • Page 72: Scanning Multiple Temperature Probes

    1594A/1595A Super-Thermometer Scanning Multiple Temperature Probes 7. If the desired measurement channel is set to Off, use the ON/OFF (F3) function key to toggle the channel to On. Pressing the Channel Select key located above the channel connection will also set the channel to On.

  • Page 73: Making A Zero-Power Measurement

    Making Measurements Making A Zero-Power Measurement c. Select the SETUP RS (F1) function key. d. Select the DEFINE RESISTOR (F2) function key. e. Select the ADD RESISTOR (F1) function key. 4. Enter a unique ID in the ID field. Pressing the ENTER key will open the Alpha-Numeric Interface for text entry.

  • Page 75: Remote Operation

    Remote Operation Configuring the Network (LAN) Port 8 Remote Operation 8.1 Introduction This section contains instructions for controlling the Super-Thermometer remotely through the available re- mote operation ports. See Table 18 for a list of the available remote operation ports. The remote operation commands listed at the end of this section are applicable with all of the remote operation ports.

  • Page 76: Hardware Mac Address

    1594A/1595A Super-Thermometer Configuring the Network (LAN) Port Configuring the LAN port is accomplished through the Remote Interface section of the System menu. The LAN configuration parameters are HARDWARE MAC, DHCP ENABLE, IP ADDRESS, GATEWAY, SUB- NET MASK, HOST NAME, and CONTROL ENABLE. To configure the LAN port settings: 1.

  • Page 77: Setting The Lan Gateway Address

    Remote Operation Configuring the Network (LAN) Port 1. In the NETWORK screen, use the Up/Down arrow keys to select DHCP ENABLE. 2. IF DHCP is set to ON, use the Left/Right arrow keys to select OFF. Press the ENTER key to save the change.

  • Page 78: Using The Web Interface

    1594A/1595A Super-Thermometer Using the Web Interface 1. In the NETWORK screen, use the Up/Down arrow keys to select HOST NAME. 2. While HOST NAME is highlighted, pressing the ENTER key opens the Alpha-Numeric Interface allowing the user to enter a host name up to 16 characters in length. 3.

  • Page 79: Configuring The Rs-232 Serial Port

    Remote Operation Configuring the IEEE-488 Port 1. Press the MENU key. 2. Select the SYSTEM MENU (F5) function key 3. Select the REMOTE INTERFACE (F2) function key 4. Select the USB (F2) function key 5. Use the Left/Right arrow keys to change PORT ENABLE to ON (enable). Before plugging the USB communication cable from the Super-Thermometer into a computer, make sure the computer is connected to the internet to allow the USB driver to download and install in the computer automatically.

  • Page 80: Interface Commands

    1594A/1595A Super-Thermometer Interface Commands 8.7 Interface Commands An alphabetical listing of the commands implemented by the Super-Thermometer is shown in Table 19 on page 70. These commands can be used with all of the remote operation ports. An example and description of each command is included following the Remote Operations Command table.
  • Page 81 Remote Operation Interface Commands Associated Setting or Command Function Function (screen) CAL:DATE Sets the instrument’s date of calibration Calibration Date (Calibration Parameters) CAL:PAR:LIN<n> Sets a calibration linearity correction parameter Linearity C<n> (Calibration Parameters) CAL:PAR:RES Sets the calibrated resistance of an internal —...
  • Page 82 1594A/1595A Super-Thermometer Interface Commands Associated Setting or Command Function Function (screen) INIT:CONT Starts or stops measurement START/STOP MEASURING (Main Screen) INIT:STOP:BEEP Sets the stop timer’s Timer Beep setting Stop Timer Enable (Timing Settings) INIT:STOP:DUR Sets the stop timer’s Timer Duration setting Stop Timer Duration (Timing Settings) INIT:STOP[:STAT]...
  • Page 83 Remote Operation Interface Commands Associated Setting or Command Function Function (screen) SENS:APER:PRES Sets the measurement timing settings to preset PRESET PRECISION PRESET values FAST PRESET LONG (Timing Settings) SENS:APER:SAMP Sets the measurement Sample Period Sample Period (Timing Settings) SENS:AVER1 Sets the Average Enable for the sample average Average Enable (Timing Settings) SENS:AVER2 Sets the digital filter’s Filter Enable...

  • Page 84: Descriptions Of Commands

    1594A/1595A Super-Thermometer Interface Commands Associated Setting or Command Function Function (screen) SYST:PASS:GROU:RES Sets the password Resistor Protection setting Resistor Protection (Password) SYST:PASS:GROU:TIME Sets the password Time/Date Protection setting Time/Date Protection (Password) SYST:PASS:NEW Changes the password Password (Password) SYST:PON:MIN? Reads the time in minutes since power-on SYST:TIME Sets the Time of the system clock Time (Time and Date)

  • Page 85: Idn

    Device dependent error Execution error Command error User request (not used) Power on 8.7.3.4 *IDN? Example response: FLUKE,1594,A9C111,1.10/1.00 Reads the instrument information. The response is given in the following format: <manufacturer>,<model number>,<serial number>,<version numbers> 8.7.3.5 *RST Sets operating settings to default states.

  • Page 86: Stb

    1594A/1595A Super-Thermometer Interface Commands Query form: *SRE? Sets the Service Request Enable register. This mask register determines which corresponding bits of the Status Byte Register (see Section 8.7.3.7, *STB?, on page 76) affect the MSS master summary bit (bit 6) of the Status Byte Register and generate a service request from the IEEE-488 port.

  • Page 87: Calc:Aver:all

    Remote Operation Interface Commands Sets the calibration Zero Correction parameter. This setting may be used to apply a zero correction to the measurement circuit. IMPORTANT: Calibration parameters should not be changed except as part of the Super-Thermometer calibration procedure performed by a qualified service technician. 8.7.3.12 CALC<n>:AVER:ALL? Example command: CALC3:AVER:ALL?

  • Page 88: Calc:Aver:max

    1594A/1595A Super-Thermometer Interface Commands Query form: CALC:AVER:COUN? Alternate parameter: DEF, MIN, MAX Sets the statistics Sample Count setting. Parameter <value> is the maximum number of samples in the moving window when the Statistics Mode set- ting is LIMITED (see Section 8.7.3.22, CALC:AVER:TCON NORM|MOV, on page 79). The range is 1 through 100 and the default is 100.

  • Page 89: Calc:Aver:sem

    Remote Operation Interface Commands 8.7.3.19 CALC<n>:AVER:SEM? Example command: CALC3:AVER:SEM? Example response: 0.000039 Reads a channel’s statistical standard error of the mean (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48). Suffix <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.

  • Page 90: Calc:Delt:data

    1594A/1595A Super-Thermometer Interface Commands Sets the Delta Channel setting (see Section 5.7.4.3, STATISTICS SETTINGS (F3), on page 49). Parameter <channel> is the channel number to use as the reference, which may be 1 through 4 for the cor- responding front channel input, 5 through 14 for channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.

  • Page 91: Data:rec:file

    Remote Operation Interface Commands 8.7.3.29 DATA:REC:FILE <name> Query form: DATA:REC:FILE? Sets the data recording USB File name (see Section 5.7.3.4.1, RECORDING SETTINGS (F1), on page 42). 8.7.3.30 DATA:REC:MEM INT|USB|BOTH Query form: DATA:REC:MEM? Sets the data recording Memory Device (see Section 5.7.3.4.1, RECORDING SETTINGS (F1), on page 42).

  • Page 92: Disp:fiel:mem

    1594A/1595A Super-Thermometer Interface Commands Reads a statistics field setting of the visible statistics fields memory set (see Section 5.7.4.2, FIELD SET- TINGS (F2), on page 48). Suffix <n> is the field number, which may be 1 through 4. The response will be one of the following: MEAN, SDEV, SEM, MAX, MIN, SPR, N, DELT, RES, RAT, TIME, or DATE.

  • Page 93: Disp:warn:its

    Remote Operation Interface Commands Sets the display Rs Due Alert enable (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default setting is OFF. 8.7.3.43 DISP:WARN:ITS <boolean> Query form: DISP:WARN:ITS? Alternate parameter: DEF Sets the display ITS-90 Subrange Alert enable (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default setting is ON.

  • Page 94: Init:stop[:Stat]

    1594A/1595A Super-Thermometer Interface Commands Alternate parameter: DEF, MIN, MAX Sets the stop timer’s Timer Duration setting (see Section 5.7.3.2, TIMING SETTINGS (F2), on page 39). The value is the number of seconds. The range is 1 to 86399 and the default is 3600 (one hour). This setting is only meaningful when Stop Timer Enable is ON.

  • Page 95: Inp:prob:coun

    Remote Operation Interface Commands Adds a new probe definition to the Probe Library. Before a probe can be assigned to a channel and tem- perature measured, the probe must have its definition added to the Probe Library (see Section 8.7.3.57, INP<n>:PROB:IDEN <id>, on page 85).

  • Page 96: Inp:prob:par ,,

    1594A/1595A Super-Thermometer Interface Commands Reads the ID of the next probe in the Probe Library. It also advances the library index used for the next re- sponse to the INP:PROB:NEXT? command. If there are no more probes in the Probe Library, the response is an empty string, “”. 8.7.3.59 INP:PROB:PAR <id>,<name>,<value>...

  • Page 97: Inp:prob:test? ,

    Remote Operation Interface Commands C0 – C7 C0 – C7 exponential number Thermistor type settings Maximum Temperature MAX_TEMP decimal number, dependent on Unit setting Conversion CONV R_POLY|T_POLY|NONE R(T) polynomial conversion settings B0 – B3 B0 – B3 exponential number T(R) polynomial conversion settings A0 –...

  • Page 98: Inp:rs:add

    1594A/1595A Super-Thermometer Interface Commands A channel’s Calculation setting will be changed from temperature to resistance (see Section 8.7.3.27, CALC<n>:TYPE TEMP|RES|RAT, on page 80) if its Reference Resistor (Rs) setting was set to the speci- fied input and the resistor assignment for the input is set to variable. A channel’s Reference Resistor (Rs) setting will be changed from the specified input to the internal 100 Ω...

  • Page 99: Inp:rs:next

    Remote Operation Interface Commands Sets the resistor definition assigned to a front reference resistor input. (Use the command INP:REAR<n>:RS:IDEN to assign a resistor definition to a rear Rs input.) Suffix <n> specifies the front input (channel) number and must be either 2 or 4. Parameter <id>...

  • Page 100: Rout:clos

    1594A/1595A Super-Thermometer Interface Commands Parameter <source> may be any of the following: <source> Function Selects the internal 1 W resistor for the reference resistor Selects the internal 10 W resistor for the reference resistor Selects the internal 25 W resistor for the reference resistor Selects the internal 100 W resistor for the reference resistor Selects the internal 10 kW resistor for the reference resistor Selects the rear RS1 input as the source for the reference resistor...

  • Page 101: Rout:scan:add

    Remote Operation Interface Commands A channel number in <channel list> may be 1 through 4 for the corresponding front channel input, 5 through 14 for channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner. If a scanner is attached, channel 1 will not be enabled.

  • Page 102: Rout:scan:stat

    1594A/1595A Super-Thermometer Interface Commands Parameter <value> is the number of measurements performed on a channel before advancing to the next chan- nel. The range is 1 through 100 and the default is 1. The *RST command sets Repeat Count to 1. 8.7.3.79 ROUT:SCAN:STAT <boolean>...

  • Page 103: Sens:aver2[:Stat]

    Remote Operation Interface Commands Password protection: Measure Protection Sets the Average Enable for the sample average (see Section 5.7.3.2, TIMING SETTINGS (F2), on page 39). The *RST command sets Average Enable to the default setting which is ON. 8.7.3.84 SENS:AVER2[:STAT] <boolean> Query form: SENS:AVER2? Password protection: Measure Protection Sets the digital filter’s Filter Enable (see Section 5.7.3.3, DIGITAL FILTER (F3), on page 41).

  • Page 104: Stat:oper

    1594A/1595A Super-Thermometer Interface Commands The returned value is a resistance ratio after processing by the digital filter. If no measurement is available, no response is returned and error code -230, “Data corrupt or stale” is generated in the error queue. 8.7.3.89 STAT:OPER? Example response: 16...

  • Page 105: Syst:beep[:Imm]

    Remote Operation Interface Commands 8.7.3.95 SYST:BEEP[:IMM] Example command: SYST:BEEP Produces an immediate beep from the speaker. 8.7.3.96 SYST:BEEP:KEY <boolean> Query form: SYST:KEY:BEEP? Alternate parameter: DEF Sets the Key Beep setting (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default setting is 8.7.3.97 SYST:BEEP:ALER <boolean>...

  • Page 106: Syst:comm:sock:cont Off|On|Quer

    1594A/1595A Super-Thermometer Interface Commands Sets the network port’s IP Address setting (see Section 8.2, Configuring the Network (LAN) Port, on page 65). Parameter <IP address> is a string specifying the address using IP dot notation. This setting is only allowed when DHCP is OFF. The query form returns the static IP address when DHCP is OFF and returns the dynamically assigned IP ad- dress when DHCP is ON.

  • Page 107: Syst:comm:sock:mac

    Parameter <name> is a string specifying the Host Name. The string may contain upper-case letters, numerals, and underscores and may be up to 24 characters in length. Issuing the command with parameter “DEF” sets the Host Name to the default value, which is “FLUKE-159X-<serial number>”. 8.7.3.112 SYST:COMM:USB[:STAT] <boolean>...

  • Page 108: Syst:err

    1594A/1595A Super-Thermometer Interface Commands 8.7.3.116 SYST:ERR? Example response: -100,“Command error” Reads the next error in the error queue. When an error is read it is removed from the error queue, and the next error may be read by sending the command again. If there are no more errors, the response is 0,“No error”. The error queue holds ten errors.

  • Page 109: Syst:pass:cen:stat

    Remote Operation Interface Commands 8.7.3.120 SYST:PASS:CEN:STAT? Returns the password-access state. The response is 0 if access is disabled and 1 if access is enabled. 8.7.3.121 SYST:PASS:GROU:MEAS <boolean> Query form: SYST:PASS:GROU:MEAS? Password protection: unconditional Alternate parameter: DEF Sets the password Measure Protection setting (see Section 5.7.7.1, PASSWORD (F4), on page 54). When Measure Protection is on, settings related to measurement, and their associated commands, are protected.

  • Page 110: Test:curr:conf ,,

    1594A/1595A Super-Thermometer Interface Commands Query form: SYST:TIME:DAYL? Password protection: Time/Date Protection Alternate parameter: DEF Sets the Daylight Saving automatic adjust setting (see Section 5.7.5.1, TIME DATE (F1), on page 50). Allowed parameter values are OFF for no automatic daylight saving adjustment, NAM for adjustment accord- ing to the schedule used in North America (the United States, Canada, and Mexico), and EUR for adjustment according to the schedule used in Europe.

  • Page 111: Test:lin:rep

    Remote Operation Interface Commands The query form returns 1 if Ratio Self-Calibration is in progress, 0 otherwise. 8.7.3.134 TEST:LIN:REP<n>? Example response: 0.00000002,0.00000001,0.00000002,0.02,0.003 Reads a report from Ratio Self-Calibration (see Section 9, Calibration, on page 103). Suffix <n> specifies the test number of which a report is requested: <n>...

  • Page 112: Test:lin:tol

    1594A/1595A Super-Thermometer Interface Commands 8.7.3.138 TEST:LIN:TOL<n>? Example response: 0.8 Reads a Ratio Self-Calibration test tolerance (see Section 9, Calibration, on page 103). Suffix <n> specifies the test number of which the error tolerance is requested (see Section 8.7.3.134, TEST:LIN:REP<n>?, on page 101). The response has units of 1×10-6.

  • Page 113: Calibration

    Thermometer to ensure it will operate correctly and meet published specifications. If the instrument cannot be brought into specification using these instructions, contact the nearest Fluke Authorized Service Center. A complete Super-Thermometer calibration is comprised of four parts; Self Test, Ratio Self-Calibration, Inter- nal Resistor Calibration, and Current Test.

  • Page 114: Ratio Calibration (F3)

    The difference between the actual measured current and the current setting should be within the measurement current accuracy. If the current is not within specification, contact the near- est Fluke Authorized Service Center for more information. 9.4 RATIO CALIBRATION (F3) The Ratio Self-Calibration function allows the user to perform a ratio linearity check or calibration using an internal resistor network.
  • Page 115 Calibration RATIO CALIBRATION (F3) sured resistance ratios. Ideally the product would be exactly 1.0. The reported error is half the difference of the combined result from 1.0, in units of 1×10 Test 3 (Equal ratio sum--100% scale) - This test evaluates linearity errors at a resistance ratio near 0.5 with the measurement circuit operating at full scale.

  • Page 116: Write File (F1)

    1594A/1595A Super-Thermometer RESISTANCE CALIBRATION (F4) The reported data of the Ratio Self-Calibration may be written to a file on a USB memory device using the WRITE FILE (F1) function key in the View Report screen (see Write File below). The calibration parameters associated with measurement linearity may be adjusted to improve the accuracy if necessary using the ADJUST PARAMETERS (F2) function key (see Adjust Parameters below).

  • Page 117: Write File (F1)

    Calibration RESISTANCE CALIBRATION (F4) To properly calibrate a Super-Thermometer internal resistor, the expanded uncertainty (k = 2) of the standard resistor should be no greater than 25% of the 95% confidence level, 1-Year Absolute Resistance Accuracy specifications. Its resistance should be approximately the same as that of the internal reference resistor being calibrated, which will result in the least measurement noise and best test uncertainty.

  • Page 118: Adjust Resistor (F2)

    1594A/1595A Super-Thermometer CALIBRATION PARAMETERS (F5) The results of the resistance calibration are written to the file as follows: RESISTANCE,<Rs>,<chan>,<standard>,<measurement>,<error>,<SE>,<date and time> <Rs> is the nominal resistance of the internal reference resistor (in W). <chan> is the channel number to which the standard resistor was connected. <standard>...

  • Page 119: Standby Current Check

    Calibration CALIBRATION PARAMETERS (F5) 9.6.2 Standby Current Check It may be necessary to check standby current to ensure proper operation. The standby current must be manu- ally checked. Each channel’s standby current can be checked with the following steps. NOTE: If a scanner is connected, channel 1 will not be available to test. Power off the Super- Thermometer and disconnect the scanner in order to test standby current on channel 1.

  • Page 121: Maintenance

    Maintenance 10 Maintenance Avoid operating the instrument in excessively wet, oily, dusty, or dirty environments. If the outside of the instrument becomes soiled it may be wiped clean with a damp cloth and mild detergent. DO NOT use harsh chemicals on the surface that may damage the paint or plastic. The instrument should be handled with care.

  • Page 123: Troubleshooting

    Make sure probe leads are not shorted to other DWF connectors. Run System Test to ensure the hardware is working properly. If System Test does not pass, contact the nearest Fluke Authorized Service Center. Multiple channels are enabled but only To measure multiple channels the unit must have the scan function enabled.
  • Page 124 Check the oven stability indicator on the Measurement screen. After 30 minutes from power up the indicator should change from SETTLING to READY. If the oven stability indicator never changes to READY, contact a Fluke Authorized Service Center. The unit could still be used with an external reference resistor since the internal oven has no affect when using external resistors.

  • Page 125: Index

    Index C1 59 C2 59 CALCULATION 30 Symbols Calibrating an SPRT 12 1.4142 30, 43 calibration 103 10/100 Base T Ethernet 65 internal resistors 106 24-hour format 50 linearity 104 2590 Scanner 20 calibration date 76 °C 50, 56, 108 Calibration Date 50, 86, 89 °F 50, 56, 108 CALIBRATION DATE 31, 35, 56...
  • Page 126 Filtering 39 DELTA 35, 48, 86 firmware 54, 95 DELTA CHANNEL 49 Firmware Version 50 Delta Mode 80 Fluke Corporation ii DELTA MODE 49 French 15, 19, 47, 82 Delta Offset 80 Front Panel 17, 19 DELTA OFFSET 49 front-panel key lock 98...
  • Page 127 Interface Commands 70 MEAN 1 45 INTERNAL 53 MEAN 2 45 Internal Memory 41, 42 MEAN 3 45 Internal Resistor Calibration 108 MEASUREMENT 107 IP address 51, 66 Measurement Current Accuracy 7 IP Address 96 Measurement Inputs 17 IP ADDRESS 51 measurement noise 8, 12, 40 ISO Guide to the Expression of Uncertainty in Measurement 5 Measurement Progress Bar 27...
  • Page 128 1594A/1595A Super-Thermometer PHASE 45 reference resistor 30, 62 POLARITY 104 Reference Resistor Drift 12 POLYNOMIAL 35, 36 REFERENCE RESISTOR (Rs) 30 PORT ENABLE 51, 52, 69 RELATIVE ERROR 107 port number 65 Relative Measurement Current Accuracy 8 Power Entry Module 15 Remote Interface 51 Power Standby key 18 REMOTE INTERFACE (F2) 51...
  • Page 129 Scanner Connection 20 STD DEV 2 45 scanning 90 STD DEV 3 45 Scanning 62 STEP 45 SCAN SETTINGS (F1) 39 stop timer 40, 84 Screens 23 STOP TIMER ENABLE 40 Screen Saver 47 Storage relative humidity 9 SCREEN SAVER DELAY 47, 57 storage space 53 SCREEN SAVER ENABLE 47, 57 Storage temperature 9...
  • Page 130 1594A/1595A Super-Thermometer TRACE 50 T(R) POLYNOMIAL 36 TYPE 34 Unit 56 UNIT 50 unlimited 79 UNLIMITED 49 Unlimited mode 49 Unpacking 15 UPDATE FIRMWARE (F5) 54 USB 17, 21, 32, 41, 42, 53, 65, 81, 97 rear 68 USB (F2) 51 USB FILE 42 User Settings 19 USER SETTINGS (F1) 47...

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