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Fluke 725Ex User Manual

Fluke 725Ex User Manual

Multifunction process calibrator
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725Ex
Multifunction Process Calibrator
Users Manual
January 2005 Rev.1, 8/05
© 2005 Fluke Corporation, All rights reserved. Printed in USA
All product names are trademarks of their respective companies.

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  • Page 1 ® 725Ex Multifunction Process Calibrator Users Manual January 2005 Rev.1, 8/05 © 2005 Fluke Corporation, All rights reserved. Printed in USA All product names are trademarks of their respective companies.
  • Page 2 LIMITED WARRANTY AND LIMITATION OF LIABILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days. This warranty extends only to...

  • Page 3: Table Of Contents

    Table of Contents Title Page Introduction ........................1 Contacting Fluke ......................1 Standard Equipment....................... 3 Safety Information ......................3 Ex Hazardous Areas ...................... 3 Faults and Damage ....................8 Safety Regulations ....................9 Certification Information..................... 10 Getting Acquainted with the Calibrator ................10 Input and Output Terminals ..................
  • Page 4 725Ex Users Manual Current Measurement with Loop Power..............19 Measuring Electrical Parameters (Lower Display) ............ 21 Measuring Temperature.................... 22 Using Thermocouples ..................22 Using Resistance-Temperature Detectors (RTDs) ..........25 Measuring Pressure ....................28 Zeroing with Absolute Pressure Modules..............29 Using Source Mode ....................... 31 Sourcing 4 to 20 mA....................
  • Page 5 (continued) Contents Service Center Calibration or Repair ................. 50 Replacement Parts ....................51 Accessories ........................53 Specifications ......................... 55 DC Voltage Measurement ..................55 DC Voltage Source....................55 Millivolt Measurement and Source* ................55 DC mA Measurement and Source................56 Ohms Measurement ....................
  • Page 6 725Ex Users Manual...

  • Page 7: List Of Tables

    Symbols..........................8 Input/Output Terminals and Connectors................11 Key Functions........................13 Thermocouple Types Accepted..................... 23 RTD Types Accepted ......................26 mA Step Values........................40 Approved Batteries ........................ 50 Replacement Parts ........................ 52 Fluke Pressure Module Compatibility ..................53 Pressure Modules ......................... 54...
  • Page 8 725Ex Users Manual...

  • Page 9: List Of Figures

    List of Figures Figure Title Page Standard Equipment......................7 Input/Output Terminals and Connectors................10 Keys ............................12 Elements of a Typical Display ....................15 Voltage-to-Voltage Test......................17 Adjusting the Contrast ......................18 Measuring Voltage and Current Output ................. 19 Connections for Supplying Loop Power................. 20 Measuring Electrical Parameters...................
  • Page 10 725Ex Users Manual Connections for Sourcing Pressure ..................38 Calibrating a Thermocouple Transmitter ................42 Calibrating a Pressure-to-Current (P/I) Transmitter .............. 44 Calibrating a Current-to-Pressure (I/P) Transmitter .............. 46 Calibrating a Chart Recorder ....................48 Replacing the Batteries ......................49...

  • Page 11: Introduction

    To order accessories, receive operating assistance, or get electrical and physical parameters. For a summary of the location of the nearest Fluke distributor or Service source and measurement functions, see Table 1. Center, call:...
  • Page 12 Pt200 Ω (385) Pt500 Ω (385) Pt1000 Ω (385) Pressure Fluke 700PEx series modules ranging from Fluke 700PEx series modules ranging from 10 in. H2O to 3,000 psi 10 in. H2O to 3,000 psi using an external pressure source (hand pump)

  • Page 13: Standard Equipment

    Replacement Parts in Table 9. 500 or CSA C22.1 Section 18. • TL75 test leads (one set) The Model 725Ex Calibrator has been designed for use in • AC72 alligator clips (one set) Ex Hazardous Areas. These are areas where potentially •...
  • Page 14 30 V and Isc not exceed 100 mA. the 725Ex calibrator Voc or of the barrier Voc. The maximum current will be the sum of the 725Ex calibrator The Model 725Ex calibrator will itself be a source of Isc and the barrier Isc.
  • Page 15 To avoid electric shock, injury, damage to the Calibrator, or ignition of an explosive atmosphere, follow all equipment safety procedures. • 725E Use the Calibrator only as described in this User Manual and the Fluke x CCD (Concept Control Drawing) or the protection provided by the Calibrator may be impaired. •...
  • Page 16 725Ex Users Manual • When servicing the Calibrator, use only specified replacement parts. Do not open the Calibrator case. Opening the case invalidates the Calibrator’s Ex Approval. • Do not allow water inside the case. • Before each use, verify the Calibrator’s operation by measuring a known voltage.
  • Page 17 Ex Hazardous Areas AC72 Alligator Clips TL75 Test Lead Set Stackable Test Leads aly01f.eps Figure 1. Standard Equipment...

  • Page 18: Faults And Damage

    725Ex Users Manual Table 2. Symbols Symbol Meaning DC - Direct Current Power ON/OFF Earth ground Conforms to ATEX requirements. Battery Risk of Danger. Important information. Refer to manual. Double insulated Conforms to relevant Canadian and US Standards. Conforms to relevant European Union directives.

  • Page 19: Safety Regulations

    When the calibrator is used in an Ex hazardous area, unless the area is known to be safe, do not connect to any circuits that exceed the entity parameters defined on Fluke 725Ex CCD Control Drawing. See “Ex Hazardous Areas”.

  • Page 20: Certification Information

    725Ex Users Manual Certification Information ( II 1 G EEx ia IIB 171 C 0344 KEMA 04ATEX1303X Class I Div. 1 Groups B,C, and D MULTIFUNCTION 725Ex PROCESS CALIBRATOR Class I Zone 0 Aex/Ex ia IIB 171 °C LR110460 2004.1573226 Ta = -10 C…...
  • Page 21 Getting Acquainted with the Calibrator Table 3. Input/Output Terminals and Connectors Name Description Pressure module Connects the Calibrator to a pressure module. connector B, C MEASURE V, mA Input terminals for measuring voltage, current, and supplying loop power. terminals TC input/output Terminal for measuring or simulating thermocouples.

  • Page 22: Keys

    II 2 G EEx ia IIC T4 ZELM 02 ATEX 0120 REFER TO CONTROL DRAWING: ANSCHLUSSSCHEMA BEACHTEN: SUIVRE LE SCHÉMA DE CONNEXION: FLUKE 725Ex CCD 30V MAX ALL TERMINALS 30V MAX ALL TERMINALS SOURCE / MEASURE SOURCE / MEASURE MEASURE...
  • Page 23 Getting Acquainted with the Calibrator Table 4. Key Functions Description Turns the power on and off. Selects voltage, mA, or loop power measurement functions in the upper display. Clears the switch test. See “Switch Test”. Selects the pressure measurement function in the upper display. Repeated pushes cycle through the different pressure units.
  • Page 24 725Ex Users Manual Table 4. Key Functions (cont.) Description Disables Shut Down Mode Enables Shut Down Mode XW Y Increases or decreases the source level. Cycles through the 2-, 3-, and 4-wire selections. Moves through the memory locations of calibrator setups.

  • Page 25: Display

    Getting Acquainted with the Calibrator Display Figure 4 shows the elements of the display. Memory Locations Loop for Calibrator Setups Annunciator Low Battery Symbol Units Display Mode Indicator Auto Ramp sh07f.eps Figure 4. Elements of a Typical Display...

  • Page 26: Getting Started

    725Ex Users Manual Press to select dc voltage sourcing. Getting Started Press to select a digit to change. Press This section introduces some basic operations of the to select 1 V for the output value. Press and hold Calibrator. to enter 1 V as the 0 % value.
  • Page 27 Shut Down Mode aly39f.eps Figure 5. Voltage-to-Voltage Test...

  • Page 28: Contrast Adjustment

    725Ex Users Manual Contrast Adjustment To adjust the contrast, proceed as follows: Press C and O until Contst Adjust is displayed as shown in Figure 6. MULTIFUNCTION 725Ex PROCESS CALIBRATOR Press and hold Xto darken contrast. Press and hold W to lighten contrast.

  • Page 29: Using Measure Mode

    Using Measure Mode Measuring Electrical Parameters (Upper Display) To measure the current or voltage output of a transmitter, MULTIFUNCTION 725Ex PROCESS CALIBRATOR or to measure the output of a pressure instrument, use the upper display and proceed as follows: Press to select volts or current.
  • Page 30 725Ex Users Manual MULTIFUNCTION 725Ex PROCESS CALIBRATOR V mA ZERO LOOP V mA MEAS SOURCE ˚ ˚ 2004.1573266 LR110460 TEST DC PWR Zone 0 AEx ia IIB 171 C – + – I.S. Class I Div 1, Groups B,C,D STORE...

  • Page 31: Measuring Electrical Parameters (Lower Display)

    Using Measure Mode Measuring Electrical Parameters (Lower Display) To measure the electrical parameters using the lower display, proceed as follows: Connect the Calibrator as shown in Figure 9. MULTIFUNCTION 725Ex PROCESS CALIBRATOR If necessary, press for MEASURE mode (lower display). Press for dc voltage or current, or frequency or resistance.

  • Page 32: Measuring Temperature

    725Ex Users Manual WCaution Measuring Temperature One thermocouple pin is wider than the other. To Using Thermocouples avoid possible damage to Calibrator or to The Calibrator supports twelve standard thermocouples, equipment under test do not try to force a including types E, N, J, K, T, B, R, S, L, XK, BP, and U.
  • Page 33 Using Measure Mode Table 5. Thermocouple Types Accepted Positive Lead (H) Type Positive Lead Color Negative Lead Specified Range Material Material (°C) ANSI* IEC** Chromel Purple Violet Constantan -200 to 950 Ni-Cr-Si Orange Pink Ni-Si-Mg -200 to 1300 Iron White Black Constantan -200 to 1200...
  • Page 34 725Ex Users Manual 30V 24mA MAX ALL TERMINALS SOURCE / MEASURE MEASURE mA + Process Temperature LOOP mA - Warning 30 V maximum to TC Miniplug aly12f.eps Figure 10. Measuring Temperature with a Thermocouple...

  • Page 35: Using Resistance-Temperature Detectors (Rtds)

    Using Measure Mode Using Resistance-Temperature Detectors (RTDs) To measure temperature using an RTD input, proceed as follows: The Calibrator accepts RTD types shown in Table 6. RTDs If necessary, press for MEASURE mode. are characterized by their resistance at 0 °C (32 °F), which is called the “ice point”...
  • Page 36 725Ex Users Manual Table 6. RTD Types Accepted α RTD Type Ice Point (R Material Range (°C) 100 Ω 0.003926 Ω/°C Pt100 (3926) Platinum -200 to 630 100 Ω 0.00385 Ω/°C Pt100 (385) Platinum -200 to 800 120 Ω 0.00672 Ω/°C...
  • Page 37 Using Measure Mode 30V 24mA MAX ALL TERMINALS SOURCE / MEASURE MEASURE mA + LOOP Resistance to mA - be measured 30V 24mA MAX ALL TERMINALS SOURCE / MEASURE MEASURE mA + Resistance to LOOP mA - be measured 30V 24mA MAX ALL TERMINALS SOURCE / MEASURE MEASURE mA +...

  • Page 38: Measuring Pressure

    Users Manual Measuring Pressure Many ranges and types of pressure modules are available Gage Differential from Fluke. See “Accessories” near the back of this High manual. Before using a pressure module, read its PRESSURE MODULE PRESSURE MODULE instruction sheet. The modules vary in use, media, and...

  • Page 39: Zeroing With Absolute Pressure Modules

    Using Measure Mode • To avoid damaging the pressure module from Zeroing with Absolute Pressure Modules corrosion, use it only with specified materials. To zero, adjust the Calibrator to read a known pressure. Refer to the printing on the pressure module This can be barometric pressure, if it is accurately known.
  • Page 40 725Ex Users Manual Isolation Valve Gage Module 725Ex MULTIFUNCTION PROCESS CALIBRATOR V mA ZERO LOOP V mA MEAS SOURCE ˚ ˚ Differential 2004.1573266 LR110460 Zone 0 AEx ia IIB 171 C I.S. Class I Div 1, Groups B,C,D STORE 100%...

  • Page 41: Using Source Mode

    Using Source Mode Enter the desired current by pressing Using Source Mode keys. In SOURCE mode, the Calibrator generates calibrated Sourcing Other Electrical Parameters signals for testing and calibrating process instruments; supplies voltages, currents, frequencies, and resistances; Volts, ohms, and frequency are also sourced and shown simulates the electrical output of RTD and thermocouple in the lower display.
  • Page 42 RECALL Loop Black Power Supply Readout or Controller – Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area. aly17f.eps Figure 14. Connections for Simulating a 4 to 20- mA Transmitter in a non-Ex hazardous Area...
  • Page 43 30V 24mA MAX ALL TERMINALS SOURCE / MEASURE MEASURE mA + LOOP mA - Device Under Test – Black Common Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area. aly16f.eps Figure 15. Electrical Sourcing Connections...

  • Page 44: Simulating Thermocouples

    725Ex Users Manual Simulating Thermocouples Simulating RTDs Connect the Calibrator TC input/output to the instrument Connect the Calibrator to the instrument under test as under test with thermocouple wire and the appropriate shown in Figure 17. Proceed as follows to simulate an...
  • Page 45 Zone 0 AEx ia IIB 171 C I.S. Class I Div 1, Groups B,C,D STORE 100% SETUP RECALL TC Miniplug Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area. aly20f.eps Figure 16. Connections for Simulating a Thermocouple...
  • Page 46 725Ex Users Manual Sensor Terminals Black Black Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area. aly40f.eps Figure 17. Connections for Simulating 3-Wire RTD...

  • Page 47: Source Pressure Mode

    Nm) of torque between the pressure module pressure in the SOURCE field. Figure 18 shows how to fittings, or between the fittings and the body connect a pump to a Fluke pressure module which makes of the module. Always apply appropriate it a calibrated source.
  • Page 48 725Ex Users Manual Connect a pressure module to the Calibrator as shown in Figure 18. The threads on the pressure modules accept standard ¼ NPT pipe fittings. Use the supplied ¼ NPT to ¼ ISO adapter if necessary. Press (lower display). The Calibrator...

  • Page 49: Setting 0 % And 100 % Output Parameters

    Setting 0 % and 100 % Output Parameters This setting may now be used for the following: Setting 0 % and 100 % Output • Parameters Manually stepping an output with 25 % increments. • Jump between the 0 and 100 % span points by For current output, the Calibrator assumes that 0 % momentarily pushing corresponds to 4 mA and 100 % corresponds to 20 mA.

  • Page 50: Auto Ramping The Output

    725Ex Users Manual Auto Ramping the Output Storing and Recalling Setups Auto ramping gives the ability to continuously apply a Store up to eight settings in a nonvolatile memory and varying stimulus from the Calibrator to a transmitter, while recall the settings for later use. A low battery condition or a your hands remain free to test the response of the battery change does not jeopardize the stored settings.

  • Page 51: Calibrating A Transmitter

    Calibrating a Transmitter Set the zero and span parameters by pressing Calibrating a Transmitter keys. Enter these parameters by pressing and Use the measurement (upper display) and source (lower holding . For more information on display) modes to calibrate a transmitter. This section setting parameters, see “Setting 0 % and 100 %”...
  • Page 52 Zone 0 AEx ia IIB 171 C – + – STORE I.S. Class I Div 1, Groups B,C,D 100% SETUP RECALL – Black Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area. aly44f.eps Figure 19. Calibrating a Thermocouple Transmitter...

  • Page 53: Calibrating A Pressure Transmitter

    Calibrating a Pressure Transmitter Calibrating a Pressure Transmitter The following example shows how to calibrate a pressure transmitter. Connect the Calibrator to the instrument under test as shown in Figure 20. Proceed as follows: Press for current (upper display). If required, press again to activate loop power.
  • Page 54 Zone 0 AEx ia IIB 171 C STORE I.S. Class I Div 1, Groups B,C,D 100% SETUP RECALL Black Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area. aly34f.eps Figure 20. Calibrating a Pressure-to-Current (P/I) Transmitter...

  • Page 55: Calibrating An I/P Device

    Calibrating an I/P Device Calibrating an I/P Device The following test allows calibration of a device that controls pressure. Proceed as follows: Connect the test leads to the instrument under test as shown in Figure 21. The connections simulate a current-to-pressure transmitter and measures the corresponding output pressure.
  • Page 56 Zone 0 AEx ia IIB 171 C I.S. Class I Div 1, Groups B,C,D STORE 100% SETUP RECALL Black Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area. aly28f.eps Figure 21. Calibrating a Current-to-Pressure (I/P) Transmitter...

  • Page 57: Switch Test

    Switch Test Note Switch Test Pressure the device slowly to ensure accurate To perform a switch test, follow these steps: readings. Run the test several times to confirm Note repeatability. This example used a normally closed switch. OPEN displays once the switch is open. Bleed the The procedure is the same for an open switch pump slowly until the pressure switch closes.

  • Page 58: Testing An Output Device

    Zone 0 AEx ia IIB 171 C I.S. Class I Div 1, Groups B,C,D STORE 100% SETUP RECALL 0 to 1 V dc Input Black Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area. aly25f.eps Figure 22. Calibrating a Chart Recorder...

  • Page 59: Replacing The Batteries

    Replacing the Batteries Replacing the Batteries WWarning Hex Key • To avoid false readings, which could lead to possible electric shock or personal injury, replace the batteries as soon as the battery indicator (M) appears. • Remove the Calibrator from the Ex- hazardous area before opening the battery door.

  • Page 60: Approved Batteries

    725Ex Users Manual Approved Batteries Table 8. Approved Batteries Battery Manufacturer Type (All Batteries Alkaline- AA 1.5 V) Duracell MN1500 Eveready (Energizer) Panasonic Powerline LR6A Rayovac Varta 4906 Ucar Gold Clean the Calibrator and pressure modules with a soft Maintenance cloth dampened with water or water and mild soap.

  • Page 61: Replacement Parts

    “Contacting Fluke” at the beginning of the manual. The Fluke 725Ex Calibrator covered by the warranty will be promptly repaired or replaced (at Fluke’s option) and Replacement Parts returned to you at no charge. See the back of the title Table 9 lists the part number of each replaceable part.
  • Page 62 Test lead, black 688066 AC72 alligator clip, red 1670641 AC72 alligator clip, black 1670652 Input Decal 690948 Fluke 725Ex CD ROM, contains Fluke 725Ex 2406548 User Manual Fluke 725Ex Control Drawing 6800032 Fluke 725Ex Safety Information 2151996 Fluke 725Ex Calibration Manual...

  • Page 63: Accessories

    The output of Fluke 700PEx pressure modules can cause prices, contact a Fluke representative. Pressure Modules the 725Ex 5 digit display to overflow, or else produce and Fluke model numbers (see Table 10) are listed values that are too low to be read if inappropriate units below.
  • Page 64 725Ex Users Manual Table 11. Pressure Modules Fluke Model Number Range Type and Media Fluke-700P01Ex 0 to 10” H differential, Low: dry High: dry Fluke-700P24Ex 0 to 15 psi differential, Low: dry High: wet Fluke-700P05Ex 0 to 30 psi gage, wet...

  • Page 65: Specifications

    Multifunction Process Calibrator Specifications Specifications DC Voltage Source All specifications apply from +18 °C to +28 °C unless Accuracy, Range Resolution stated otherwise. All specifications assume a 5 minute (% of Reading + Counts) warmup period. 100 mV 0.01 mV 0.02 % + 2 DC Voltage Measurement 10 V...

  • Page 66: Dc Ma Measurement And Source

    725Ex Users Manual DC mA Measurement and Source Ohms Source Accuracy, Excitation Current from Accuracy Range Resolution Ohms Range ± Ω (% of Reading + Counts) Measurement Device 15 to 400 Ω 24 mA 0.001 mA 0.15 to 0.5 mA 0.15...

  • Page 67: Frequency Source

    Multifunction Process Calibrator Specifications Frequency Source Measure and Source Type Range Accuracies Accuracy Range Resolution (% of output 600 to 800 °C 2.2 °C 800 to 1000 °C 1.8 °C frequency) 1000 to 1800 °C 1.4 °C ± 0.05 % 2.0 to 1000.0 CPM 0.1 CPM -200 to 0 °C...

  • Page 68: Rtd Excitation (Simulation)

    725Ex Users Manual RTD Excitation (simulation) Allowable Excitation by RTD type Ni 120 0.15 to 3.0 mA Pt 100-385 0.15 to 3.0 mA Pt 100-3926 0.15 to 3.0 mA Pt 100-3916 0.15 to 3.0 mA Pt 200-385 0.05 to 0.80 mA Pt 500-385 0.05 to 0.80 mA...

  • Page 69: Pressure Measurement

    Multifunction Process Calibrator Specifications Pressure Measurement Range Resolution Accuracy Units Determined by 5 digits Determined by psi, inH2O@4 C, inH2O@20 C, inH2O@60 F, kPa, pressure module pressure module cmH2O@4 C, cmH2O@20 C, bar, mbar, kg/cm , mmHg, inHg General Specifications Operating temperature -10 C to 55 C Storage temperature...
  • Page 70 725Ex Users Manual Entity Parameters For Entity Parameters, Refer to Fluke 725Ex CCD, Control Drawing for use in Ex hazardous areas.

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