712B/714B RTD/Thermocouple Calibrator Calibration Manual March 2015 © 2015 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
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 three years and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days.
Table of Contents Title Introduction ............................................................................................ Contact Fluke ........................................................................................ Safety Information ................................................................................. Symbols ................................................................................................. 712B Specifications ...................................................
712B/714B Calibration Manual Adjust 500 Ω Source...................................................................... Adjust 3500 Ω Source.................................................................... Adjust Trigger Current for Ohms Measure ........................................ Adjust 0.1 mA Trigger Current ....................................................... Adjust 0.25 mA Trigger Current ..................................................... Adjust 0.5 mA Trigger Current .....................
List of Tables Table 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. Title Symbols..................................................................................................... Required Equipment for 712B Verification and Calibration Adjustment .... Required Equipment for 714B Verification and Calibration Adjustment .... 712B Ohms Source Limits......................................................................... 712B 4-Wire Ohms Measure Limits ....................................................
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List of Figures Figure Title 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. Replace the Batteries ................................................................................ Verify 712B Ohms Source ......................................................................... Verify 712B 4-Wire Ohms Measure ........................................................... Verify 712B 3-Wire Ohms Measure ...........................................................
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Introduction The Fluke 712B/714B RTD/Thermocouple Calibrator (the Product) is a handheld, battery-operated instrument that measures and sources a variety of RTDs/thermocouples. It also has an isolated channel to measure 4-20 mA.
712B/714B Calibration Manual • Remove all probes, test leads, and accessories before the battery door is opened. • Remove the input signals before you clean the Product. • Have an approved technician repair the Product. • Replace the batteries when the low battery indicator shows to prevent incorrect measurements. For safe operation and maintenance of the Product: • Repair the Product before use if the batteries leak.
RTD/Thermocouple Calibrator 712B Specifications 712B Specifications Specifications are based on a one year calibration cycle and apply from +18 °C to +28 °C unless stated otherwise. All specifications assume a 5 minute warmup period. DC mA Measurement Accuracy (% of Reading + Floor) Range 0-24 mA Resolution 0.001 mA 1 Year 2 Year 0.01 % + 2 μA 0.02 % + 4 μA • Notes: • Temperature coefficient: ±(0.002 % of reading + 0.
712B/714B Calibration Manual RTD Input and Output Measure (°C) RTD Type (α) 1 Year 2 Year Source Current 1 Year 2 Year 10 Ω Pt(385) -200 to 100 1.5 3 1 mA 1.5 3 100 to 800 1.8 3.6 1 mA 1.8 3.6 50 Ω Pt(385) -200 to 100 0.4 0.7 1 mA 0.4 0.7 100 to 800 0.5 0.8 1 mA 0.5 0.8 100 Ω Pt(385) -200 to 100 0.2 °C 0.4 °C 0.2 °C 0.4 °C 100 to 800 0.015 %+0.18 °C 0.03 %+0.36 °C 0.015 %+0.18 °C 0.03 %+0.36 °C 200 Ω Pt(385) -200 to 100 0.2 °C 0.4 °C 0.2 °C 0.
RTD/Thermocouple Calibrator General Specifications Maximum voltage applied between any terminal and earth ground or between any two terminals: 30 V Operating temperature -10 °C to 50 °C Storage temperature -20 °C to 60 °C 2,000 meters 12,000 meters Operating altitude Storage altitude Relative Humidity (% RH operating without condensation) Vibration Requirements Drop Test Requirements IP Rating Electromagnetic Environment Safety Non condensing 90 % (10 °C to 30 °C) 75 % (30 °C to 40 °C) 45 % (40 °C t
712B/714B Calibration Manual 714B Specifications Specifications are based on a one year calibration cycle and apply from +18 °C to +28 °C unless stated otherwise. All specifications assume a 5 minute warmup period. Thermocouple mV Input Range -10 mV to 75 mV Accuracy (% of Reading + Floor) Resolution 0.001 mV 1 Year 2 Year 0.015 % + 10 µV 0.02 % + 15 µV Temperature coefficient: ±(0.002 % of reading + 0.
RTD/Thermocouple Calibrator 714B Specifications S C L U BP XK G D P M -20 to 0 2.3 2.8 1.2 1.8 0 to 200 1.5 2.1 1.1 1.7 200 to 1400 1400 to 1767 0 to 800 800 to 1200 1200 to 1800 1800 to 2316 -200 to -100 -100 to 800 800 to 900 -200 to 0 0 to 600 0 to 1000 1000 to 2000 2000 to 2500 -200 to 300 300 to 800 100 to 300 300 to 1500 1500 to 2315 0 to 300 300 to 1500 1500 to 2315 0.9 1.1 0.6 0.8 1.1 2.0 0.6 0.3 0.5 0.6 0.3 1.0 1.6 2.0 0.2 0.4 1.6 1.0 2.0 1.6 1.0 2.0 1.4 1.7 0.9 1.2 1.6 3.
712B/714B Calibration Manual General Specifications Maximum voltage applied between any terminal and earth ground or between any two terminals: 30 V Operating temperature -10 °C to 50 °C Storage temperature -20 °C to 60 °C 2,000 meters 12,000 meters Non condensing 90 % (10 °C to 30 °C) 75 % (30 °C to 40 °C) 45 % (40 °C to 50 °C) (Without condensation) Operating altitude Storage altitude Relative Humidity (% RH operating without condensation) Vibration Requirements MIL-T-28800E, Class 2 Drop Test R
RTD/Thermocouple Calibrator Maintenance Maintenance Replace the Batteries Warning To prevent false readings, which could lead to possible electric shock or personal injury, replace the batteries as soon as the low battery indicator appears. Figure 1 shows how to replace the batteries. Figure 1. Replace the Batteries hnh38.eps Clean the Product Warning To prevent personal injury or damage to the Product, use only the specified replacement parts and do not allow water into the case.
712B/714B Calibration Manual Required Equipment The equipment listed in Table 2 is necessary to do the calibration and test for the 712B. The equipment listed in Table 3 is necessary to do the calibration and test for the 714B. Note Fluke 5522A and Fluke 8508A need an 8-hour warmup period before the calibration starts. The 5522A needs to zero all the functions weekly and zero Ohms output function every day.
RTD/Thermocouple Calibrator 712B Performance Verification 712B Performance Verification Verify that the 712B performance is within the 1 or 2 year specifications as desired. Turn the 712B on and let it warm up for 5 minutes. Verify Ohms Source 1. Make connections between the 712B and the 8508A, as shown in Figure 2. Fluke 8508A Fluke 712B Figure 2. Verify 712B Ohms Source hwp011.eps 2. Set the 8508A to 4-wire ohms measurement mode. Set the resolution of Ohms measurement mode to 7 1/2-digits or above.
712B/714B Calibration Manual Table 4. 712B Ohms Source Limits Source (Ω) 1 Yr. Lower Limit (Ω) 1 Yr. Upper Limit (Ω) 2 Yr. Lower Limit (Ω) 2 Yr. Upper Limit (Ω) 8508A Range 1 0.950 1.050 0.920 1.080 2k range, 4W 10 9.949 10.052 9.917 10.083 2k range, 4W 100 99.935 100.065 99.890 100.110 2k range, 4W 390 389.892 390.109 389.803 390.197 2k range, 4W 1000 999.35 1000.65 998.90 1001.10 20k range, 4W 4000 3998.90 4001.10 3998.00 4002.
RTD/Thermocouple Calibrator 712B Performance Verification Table 5. 712B 4-Wire Ohms Measure Limits Range (Ω) Applied Ω from 5522A (Ω) 1 Yr. Lower Limit (Ω) 1 Yr. Upper Limit (Ω) 2 Yr. Lower Limit (Ω) 2 Yr. Upper Limit (Ω) 400 1 0.95 1.05 0.92 1.08 400 10 9.95 10.05 9.92 10.08 400 100 99.94 100.06 99.89 100.11 400 390 389.89 390.11 389.80 390.20 4000 1000 999.4 1000.6 998.9 1001.1 4000 4000 3998.9 4001.1 3998.0 4002.0 Verify 3-Wire Ohms Measure 1.
712B/714B Calibration Manual Table 6. 712B 3-Wire Ohms Measure Limits Applied Ω Range (Ω) from 5522A (Ω) 1 Yr. Lower Limit (Ω) 1 Yr Upper Limit (Ω) 2 Yr. Lower Limit (Ω) 2 Yr Upper Limit (Ω) 400 1 0.90 1.10 0.87 1.13 400 100 99.89 100.11 99.84 100.16 4000 1000 999.2 1000.8 998.7 1001.3 Verify mA Measure 1. Make the connections between the 712B, 8508A, and 5522A, as shown in Figure 5. 2.
RTD/Thermocouple Calibrator 712B Performance Verification Fluke 8508A Fluke 5522A 5522A CALIBRATOR Fluke 712B hwp004.eps Figure 5. Verify 712B mA Measure Table 7. 712B mA Measure Limits DC Current Display from 8508A (mA) 1 Yr. Lower Limit 1 Yr Upper Limit 2 Yr. Lower Limit 2 Yr Upper Limit (mA) (mA) (mA) (mA) 0.100 0.098 0.102 0.096 0.104 19.000 18.996 19.004 18.992 19.
712B/714B Calibration Manual 714B Performance Verification Verify that the 714B performance is within the 1 or 2 year specifications as desired. Turn the 714B on and let it warm up for 5 minutes. Verify mV Source 1. Make connections between the 714B and the 8508A with copper wire, as shown in Figure 6. Fluke 8508A Fluke 714B Pure Copper Cables Pure Copper TC Miniplug hwp006.eps Figure 6. Verify 714B mV Source 2. Set the 714B to Source mV mode. a. Push . b. Push until mV is highlighted. c.
RTD/Thermocouple Calibrator 714B Performance Verification Verify mV Measure 1. Make connections between the 714B and the 5522A with copper wire, as shown in Figure 7. Fluke 5522A 5522A CALIBRATOR Fluke 714B Pure Copper Cables Pure Copper TC Miniplug hwp007.eps Figure 7. Verify 714B mV Measure 2. Push to set the 714B to mV Measure mode. 3. Set the 5522A to the first value in Table 9. 4. Output the mV values in Table 9 and verify that the 714B readings are within the limits shown. Table 9.
712B/714B Calibration Manual 7526A Fluke 714B 7526A PRECISION PROCESS CALIBRATOR mA VOLTS RTD/ 100 mA MAX OUTPUT HI HI LO LO OUTPUT 100 V MAX TC INPUT/OUTPUT 20 V PK MAX 4 W RTD/ INPUT HI CURRENT 20 V PK MAX SENSE LO 20 V PK MAX K Type TC Miniplug hwp015.eps Figure 8. Verify Type K Measure 4. Set the 7526A to the values in Table 10 and verify that the 714B readings are within the limits shown. Table 10. 714B Type K Measure Limits 5522A Sourced (°C) 1 Yr.
RTD/Thermocouple Calibrator 714B Performance Verification Verify mA Measure 1. Connect the 5522A, 8508A, and 714B, as shown in Figure 9. 2. Set the 8508A to DCI measurement mode, set the range of the DCI measurement mode to 20 mA and the resolution of DCI measurement mode to 7 1/2-digits. 3. Set the 5522A to source and make sure that 8508A shows the first dc current in Table 12. 4. Output the dc current values in Table 12 and verify that the 714B readings are within the limits shown.
712B/714B Calibration Manual 712B Calibration Adjustment This section describes how to adjust for the 712B. Enter Manual Calibration Mode To enter manual calibration mode: 1. Power off the Product. 2. Push and hold down and at the same time. 3. Push and then release . 4. Release and . The Welcome screen shows. 5. After a warmup period of approximately 5 minutes, start the calibration adjustment. hwp01.
RTD/Thermocouple Calibrator 712B Calibration Adjustment Adjust 50 Ω Source 1. Set the range of 8508A 4-Wire measurement to 2 kΩ. 2. Push on the 712B to enter the 50 Ω Source calibration mode. 3. Wait approximately 10 seconds until the 8508A shows a stable reading. 4. Use the arrow keys to input the reading into the 712B. 5. Confirm the input. hwp02.jpg Adjust 350 Ω Source 1. Push to enter 350 Ω Source calibration mode. 2. Wait approximately 10 seconds until the 8508A shows a stable reading. 3.
712B/714B Calibration Manual Adjust 500 Ω Source 1. Set the range of 8508A 4-Wire measurement to 20 kΩ. 2. Push to enter 500 Ω Source calibration mode. 3. Wait approximately 10 seconds until the 8508A shows a stable reading. 4. Input the reading into the 712B. 5. Confirm the input. hwp04.jpg Adjust 3500 Ω Source 1. Push to enter 500 Ω Source calibration mode. 2. Wait approximately 10 seconds until the 8508A shows a stable reading. 3. Input the reading into the 712B. 4. Confirm the input. hwp05.
RTD/Thermocouple Calibrator 712B Calibration Adjustment Adjust Trigger Current for Ohms Measure Before the calibration adjustment, set the 8508A to DCI measurement mode, set the resolution of DCI measurement mode to 7 1/2-digits, and use one set of banana plug patch cords to connect the 712B and the 8508A, as shown in Figure 11. Fluke 8508A Fluke 712B Figure 11. Adjust 712B Trigger Current hwp002.eps Adjust 0.1 mA Trigger Current 1. Set the range of the 8508A dc mA measurement to 2 mA. 2.
712B/714B Calibration Manual Adjust 0.25 mA Trigger Current 1. Push on the 712B to enter 0.25 mA trigger current calibration mode. 2. Wait approximately 15 seconds until the 8508A shows a stable reading. 3. Input the reading into the 712B. 4. Confirm the input. hwp07.jpg Adjust 0.5 mA Trigger Current 1. Push on the 712B to enter 0.5 mA trigger current calibration mode. 2. Wait approximately 15 seconds until the 8508A shows a stable reading. 3. Input the reading into the 712B. 4. Confirm the input.
RTD/Thermocouple Calibrator 712B Calibration Adjustment Adjust 1 mA Trigger Current 1. Push on the 712B to enter 1 mA trigger current calibration mode. 2. Wait approximately 15 seconds until the 8508A shows a stable reading. 3. Input the reading into the 712B. 4. Confirm the input. hwp09.jpg Adjust Ohms Measure Before the calibration adjustment, set the 5522A to Ohms source output mode, and use two sets of banana plug patch cords to connect the 712B and the 5522A, as shown in Figure 12.
712B/714B Calibration Manual Adjust 50 Ω Input 1. Set the 5522A to output 50 Ω. 2. Wait approximately 10 seconds for a stable output of the 5522A. 3. Confirm the reading on the 712B. hwp10.jpg Adjust 350 Ω Input 1. Push on the 712B to enter 350 Ω input calibration mode. 2. Set the 5522A to output 350 Ω. Wait approximately 10 seconds for a stable output of the 5522A. 3. Confirm the reading on the 712B. hwp11.
RTD/Thermocouple Calibrator 712B Calibration Adjustment Adjust 500 Ω Input 1. Push on the 712B to enter 500 Ω input calibration mode. 2. Set the 5522A to output 500 Ω. Wait approximately 10 seconds for a stable output of the 5522A. 3. Confirm the reading on the 712B. hwp12.jpg Adjust 3500 Ω Input 1. Push on the 712B to enter the 3500 Ω input calibration mode. 2. Set the 5522A to output 3500 Ω. Wait approximately 10 seconds for a stable output of the 5522A. 3.
712B/714B Calibration Manual Adjust mA Measure Before the calibration adjustment, set the 5522A to mA (dc) source output mode, and use one set of banana plug patch cords to connect the 712B and the 5522A, as shown in Figure 13. Fluke 5522A 5522A CALIBRATOR Fluke 712B Figure 13. Adjust 712B mA Measure hwp022.eps Adjust 0.1 mA Input 1. Set the 5522A to output 0.1 mA. 2. Push on the 712B to enter 0.1 mA input calibration mode. Wait approximately 10 seconds for a stable output of the 5522A. 3.
RTD/Thermocouple Calibrator 712B Calibration Adjustment Adjust 24 mA Input 1. Set the 5522A to output 24 mA. 2. Push on the 712B to enter 24 mA input calibration mode. Wait approximately 10 seconds for a stable output of the 5522A. 3. Confirm the reading on the 712B. hwp15.jpg Adjust External Trigger for Ohms Source Before the calibration, set the 5522A to mA (dc) source output mode, and use one set of banana plug patch cords to connect the 712B and the 5522A, as shown in Figure 14.
712B/714B Calibration Manual Adjust 0.1 mA External Trigger 1. Set the 5522A to output 0.1 mA. 2. Push on the 712B to enter 0.1 mA external trigger calibration mode. 3. Wait approximately 10 seconds for a stable output of the 5522A. 4. Confirm the reading on the 712B. hwp16.jpg Adjust 1 mA External Trigger 1. Set the 5522A to output 1 mA. 2. Push on the 712B to enter 1 mA external trigger calibration mode. 3. Wait approximately 10 seconds for a stable output of the 5522A. 4.
RTD/Thermocouple Calibrator 714B Calibration Adjustment Save Data and Reset the 712B System After the calibration procedure described above is done, push to confirm and store the calibration data. The 712B system is automatically reset. hwp18.jpg hwp19.jpg 714B Calibration Adjustment Enter Calibration Mode To enter manual calibration mode: 1. Power off the Product. 2. Push and hold down and at the same time. 3. Push and then release . 4. Release and . The Welcome screen shows. 5.
712B/714B Calibration Manual Use 8508A to Adjust the 5522A Output To use the 8508A to calibrate the 5522A output: 1. Connect the voltage output terminals of the 5522A with the voltage input connectors of the 8508A via the pure copper cables. 2. Set the resolution of DCV measurement mode to 7 1/2-digits or above. 3. Adjust the output of the 5522A until the reading of the 8508A is -10 mV ±0.2 μV, and record the voltage setting of the 5522A (=Voltage-10mV Setting). 4.
RTD/Thermocouple Calibrator 714B Calibration Adjustment 4. Push to enter the 75 mV source calibration mode. hwp22.jpg 5. Input the new reading on the 8508A to the 714B. 6. Push to confirm. Adjust mV Measure 1. Connect the 714B TC mini plug to the 5522A with pure copper cables, as shown in Figure 16. Fluke 5522A 5522A CALIBRATOR Fluke 714B Pure Copper Cables Pure Copper TC Miniplug Figure 16. Adjust 714B mV Measure hwp007.eps The 5522A outputs the value (Voltage-10mV Setting).
712B/714B Calibration Manual hwp23.jpg The 5522A outputs the value (Voltage75mV Setting). 2. After approximately 10 seconds, push to calibrate the value. hwp24.jpg Adjust Internal Cold Junction Temperature Use the Fluke 9101-256 or a lag bath to calibrate the internal cold junction temperature. Use the Fluke 9101-256 To use the Fluke 9101-256 to calibrate the internal cold junction temperature: 1. 34 Connect the Fluke 9101-256 and the 714B via the J type thermocouple sensor, as shown in Figure 17.
RTD/Thermocouple Calibrator 714B Calibration Adjustment Fluke 9101-256 Fluke 714B J TYPE TC Sensor Figure 17. Connect the 714B to the Fluke 9101-256 hwp008.eps 2. After the J type thermocouple is inserted, wait approximately 5 minutes for the temperature reading to stabilize. 3. Push to calibrate the cold junction temperature. hwp25.
712B/714B Calibration Manual Use a Lag Bath To use a lag bath to calibrate the internal cold junction temperature: 1. Connect the lag bath and the 714B via the J type thermocouple sensor, and immerse the thermocouple and a precision mercury thermometer in the mineral oil lag bath, as shown in Figure 18. 2. After the thermocouple is inserted, wait approximately 5 minutes for the temperature reading to stabilize. 3. Record the reading on the standard sensor, and input the reading to the 714B. 4.
RTD/Thermocouple Calibrator 714B Calibration Adjustment Adjust mA Measure 1. Connect the 5522A and the 714B via the Fluke-75X-8014 cable, as shown in Figure 19. The 5522A outputs 0.1 mA. hwp26.jpg Fluke 5522A 5522A CALIBRATOR Fluke 714B Figure 19.714B and 5522A mA Channel Connections hwp023.
712B/714B Calibration Manual 2. Push . The 5522A outputs 24mA. 3. Push to adjust. hwp27.jpg Save Data and Reset the 714B System After the calibration procedure described above is done, push to confirm and store the calibration data. The 714B system is automatically reset. hwp28.jpg 38 hwp29.
RTD/Thermocouple Calibrator User-Replaceable Parts and Accessories User-Replaceable Parts and Accessories Warning To prevent possible electrical shock, fire, or personal injury, use only specified replacement parts. User-replaceable parts for the 712B are listed in Table 13 and shown in Figure 20. User-replaceable parts for the 714B are listed in Table 14 and shown in Figure 21. For more information about these items, contact a Fluke representative. See the “Contact Fluke” section of this manual.
712B/714B Calibration Manual 11 1 12 10 2 13 14 6 3 15 7 4 19 16 17 5 18 8 9 Figure 20.User-Replaceable Parts and Accessories for 712B 40 hqu46.
RTD/Thermocouple Calibrator User-Replaceable Parts and Accessories Table 14. User-Replaceable Parts and Accessories for 714B Item Description Part Number Case top 4307120 Decal on case top 4307173 TC cap 4369726 Keypad 4307158 Keypad support 4307112 Screw, M2.2 x 0.8, 5 mm, PAN, Philips 2032777 TC plate 4307381 Screw, M3-0.
712B/714B Calibration Manual 13 1 2 21 14 15 3 9 4 16 5 17 6 10 18 19 22 20 7 8 11 12 Figure 21. User-Replaceable Parts and Accessories for 714B 42 hrk46.
