1535/1537. Calibration Manual. Insulation Tester

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1 1535/1537 Insulation Tester Calibration Manual August Fluke Corporation. All rights reserved. All product names are trademarks of their respective companies. Specifications are subject to change without notice.

2 LIMITED WARRANTY AND LIMITATION OF LIABILITY The Fluke 1537 will be free from defects in material and workmanship for three years from the date of purchase. The Fluke 1535 will be free from defects in material and workmanship for one year from the date of purchase. This warranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling. Resellers are not authorized to extend any other warranty on Fluke s behalf. To obtain service during the warranty period, contact your nearest Fluke authorized service center to obtain return authorization information, then send the product to that Service Center with a description of the problem. THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE IS NOT LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR THEORY. Since some states or countries do not allow the exclusion or limitation of an implied warranty or of incidental or consequential damages, this limitation of liability may not apply to you. 11/99 Fluke Corporation P.O. Box 9090 Everett, WA U.S.A. China Service Center Rm 101, 1/F, Tong Heng Tower No. 4 Hua Yuan Road, Hai Dian District, Beijing , P.R.C. Hotline:

3 Table of Contents Title Page Introduction How to Contact Fluke Safety Information General Specifications Electrical Specifications Principle of Measurement and Resistance Equipment and Environment Calibration Procedure Performance erification Maintenance Cleaning Battery Replacement Replacement Parts i

4 1535/1537 Calibration Manual ii

5 Introduction XW Warning To prevent electric shock or personal injury, do not perform the calibration verification tests or calibration procedures described in this manual unless you are qualified to do so. The information provided in this manual is for the use of qualified personnel only. The Fluke 1535/1537 Insulation Testers (the Tester or Product) are high-voltage insulation testers to validate general circuits, such as switchgear, motors, and cables. For complete operating instructions, refer to the Users Manual at How to Contact Fluke To contact Fluke, call one of the following telephone numbers: Technical Support China: Calibration/Repair USA: FLUKE ( ) Canada: FLUKE ( ) Europe: Japan: Singapore: Anywhere in the world: Or, visit Fluke's website at To register your product, visit To view, print, or download the latest manual supplement, visit 1

6 1535/1537 Calibration Manual Safety Information A Warning identifies hazardous conditions and procedures that are dangerous to the user. A Caution identifies conditions and procedures that can cause damage to the Product or the equipment under test. XW Warning To prevent possible electrical shock, fire, or personal injury: 2 Carefully read all instructions. Read all safety information before you use the Product. Do not alter the Product and use only as specified, or the protection supplied by the Product can be compromised. Do not use the Product around explosive gas, vapor, or in damp or wet environments. Do not use the Product if it is altered or damaged. Disable the Product if it is damaged. Do not use the Product if it operates incorrectly. Use Product-approved measurement category (CAT), voltage, and amperage rated accessories (probes, test leads, and adapters) for all measurements. Do not exceed the Measurement Category (CAT) rating of the lowest rated individual component of a Product, probe, or accessory. Do not use in CAT III or CAT I environments without the protective cap installed on test probe. The protective cap decreases the exposed probe metal to <4 mm. This decreases the possibility of arc flash from short circuits. Comply with local and national safety codes. Use personal protective equipment (approved rubber gloves, face protection, and flame-resistant clothes) to prevent shock and arc blast injury where hazardous live conductors are exposed. Examine the case before you use the Product. Look for cracks or missing plastic. Carefully look at the insulation around the terminals. Do not use test leads if they are damaged. Examine the test leads for damaged insulation, exposed metal, or if the wear indicator shows. Check test lead continuity. Do not touch voltages >30 ac rms, 42 ac peak, or 60 dc. Do not apply more than the rated voltage, between the terminals or between each terminal and earth ground. Measure a known voltage first to make sure that the Product operates correctly. Limit operation to the specified measurement category, voltage, or amperage ratings. The battery door must be closed and locked before you operate the Product. Connect the common test lead before the live test lead and remove the live test lead before the common test lead. Remove all probes, test leads, and accessories before the battery door is opened. Remove all probes, test leads, and accessories that are not necessary for the measurement. Keep fingers behind the finger guards on the probes. Replace the batteries when the low battery indicator shows to prevent incorrect measurements. Use the correct terminals, function, and range for measurements.

7 Insulation Tester Safety Information Place test leads in proper input terminals. Do not work alone. Do not use in distribution systems with voltages higher than 660. Use only recommended test leads. Remove all power from the circuit under test and discharge circuit capacitance before testing resistance or capacitor with the tester. Results of measurement can be adversely affected by the impedances of additional operating circuits connected in parallel or by transient currents. Before and after testing, confirm that the Tester does not indicate the presence of a hazardous voltage. If a hazardous voltage is shown on the display, remove power from the circuit under test or allow the installation capacitance to fully discharge. Do not disconnect the test leads before a test has been completed and the test voltage at the terminals has returned to zero. This ensures that any charged capacitance is fully discharged. Use the guard terminal only as specified in this manual. Do not allow other foreign objects coming into contact with the guard terminals as safety may be compromised Remove the input signals before you clean the Product. Use only specified replacement parts. Repair the Product before use if the battery leaks. Be sure that the battery polarity is correct to prevent battery leakage. Do not operate the Product with covers removed or the case open. Hazardous voltage exposure is possible. Have an approved technician repair the Product. 3

8 1535/1537 Calibration Manual Symbols used on the Product and in this manual are explained in Table 1. Table 1. Symbols Symbol Description X WARNING. HAZARDOUS OLTAGE. Risk of electric shock. W WARNING. RISK OF DANGER. Consult user documentation. China metrology certification mark for measuring instruments manufactured in the People s Republic of China (PRC). P Conforms to European Union directives. Battery R Continuity test or continuity beeper tone. (1537 only) T Double Insulated 6 WARNING. Do not apply greater than 660 olts. Interference is present. Displayed value might be outside of specified accuracy. 步进 Ramp mode indicator Electrical breakdown Both direct and alternating current Earth Measurement Category III is applicable to test and measuring circuits connected to the distribution part of the building s low-voltage MAINS installation. Measurement Category I is applicable to test and measuring circuits connected at the source of the building s low-voltage MAINS installation. ~ 4 This product complies with the WEEE Directive marking requirements. The affixed label indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation" product. Do not dispose of this product as unsorted municipal waste.

9 Insulation Tester General Specifications General Specifications Display mm x 104 mm Battery x AA alkaline IEC LR6 Dimensions (H x W x L) mm x 211 mm x 93 mm Weight kg Temperature Operating C to +50 C Storage C to +60 C Operating Humidity Non condensing (<10 C) 80 % RH (at 10 C to 30 C) 50 % RH (at 30 C to 50 C) Altitude Operating m Storage m Overvoltage Category CAT I 600 Safety General IEC : Pollution Degree 2 IEC : CAT I 600 IEC Insulation Resistance Measurement IEC Effectiveness of the Protective Measures IEC Intrusion Protection (IP) Rating IEC 60529: IP40 Electromagnetic Compatibility (EMC) International IEC : Portable Electromagnetic Environment IEC CISPR 11: Group 1, Class A Group 1: Equipment has intentionally generated and/or uses conductively-coupled radio frequency energy that is necessary for the internal function of the equipment itself. Class A: Equipment is suitable for use in all establishments other than domestic and those directly connected to a low-voltage power supply network that supplies buildings used for domestic purposes. There may be potential difficulties in ensuring electromagnetic compatibility in other environments due to conducted and radiated disturbances. Caution: This equipment is not intended for use in residential environments and may not provide adequate protection to radio reception in such environments. Number of Insulation Resistance Measurements Rload (Ω) Un () Number of Measurements kω kω MΩ MΩ

10 1535/1537 Calibration Manual Electrical Specifications The Tester s accuracy is specified for 1 year after calibration at operating temperatures of 10 C to 30 C. For operating temperatures outside the range (-10 C to +10 C and +30 C to +50 C), add ±0.25 % per C for 5 % bands, add ±1 % per C for 20 % bands. Insulation Resistance Measurement Test oltage Range Resolution Accuracy <200 kω 200 kω to 500 kω 1 kω 0.50 MΩ to 5.00 MΩ 10 kω 5.0 MΩ to 50.0 MΩ 100 kω 50 MΩ to 500 MΩ 1 MΩ 0.50 GΩ to 5.00 GΩ 10 MΩ 5.0 GΩ to 50.0 GΩ 500 MΩ 20 % >50 GΩ <200 kω 200 kω to 500 kω 1 kω 0.50 MΩ to 5.00 MΩ 10 kω 5.0 MΩ to 50.0 MΩ 100 kω 50 MΩ to 500 MΩ 1 MΩ 0.50 GΩ to 5.00 GΩ 10 MΩ 5.0 GΩ to 10.0 GΩ 100 MΩ 10.0 GΩ to 50.0 GΩ 500 MΩ 20 % 50 GΩ to 100 GΩ 5 GΩ 20 % >100 GΩ

11 Insulation Tester Electrical Specifications Insulation Resistance Measurement Test oltage Range Resolution Accuracy <200 kω 200 kω to 500 kω 1 kω 0.50 MΩ to 5.00 MΩ 10 kω 5.0 MΩ to 50.0 MΩ 100 kω 50 MΩ to 500 MΩ 1 MΩ 0.50 GΩ to 5.00 GΩ 10 MΩ 5.0 GΩ to 20.0 G 100 MΩ 20.0 GΩ to 50.0 G 500 MΩ 20 % 50 GΩ to 200 GΩ 5 GΩ 20 % >200 GΩ <200 kω 200 kω to 500 kω 1 kω 0.50 MΩ to 5.00 MΩ 10 kω 5.0 MΩ to 50.0 MΩ 100 kω 50 MΩ to 500 MΩ 1 MΩ 0.50 GΩ to 5.00 GΩ 10 MΩ 5.0 GΩ to 50.0 GΩ 100 MΩ 50 GΩ to 500 GΩ 5 GΩ 20 % >500 GΩ Bar graph range: 0 Ω to 1 TΩ Insulation test voltage accuracy: -0 %, +10 % at 1 ma load current Charging rate for capacitive load: 5 s/μf Discharge rate for capacitive load: 1.5 s/μf Function Range Accuracy Leakage Current Measurement 1 na to 2 ma ±(20 % + 2 na) Capacitive Measurement 0.01 μf to 2.00 μf ±(15 % of reading μf) Insulation Resistance Test oltage 250 to 2500 ±(3 % + 3 ) Function Timer Range 0 to 99 minutes Resolution Setting: 1 minute Indication: 1 second 7

12 1535/1537 Calibration Manual Warning Range Live circuit warning >30 Short circuit current >2 ma >5 ma AC / DC / Resistance Measurement (1537 Only) Function Range Accuracy ±(% reading + Digits) Resolution AC 0 to ±(2 % +10) (45 Hz to 500 Hz) DC 0 to ±(2 % +10) 0 Ω to Ω 0.1 Ω 600 Ω to 6000 Ω 1Ω 6.00 kω to kω 10 Ω Resistance ±(2 % +10) Operating Ranges and Uncertainties per EN Function Display Range EN Measurement Range Operating Uncertainty ±(% reading + Digits) EN [1] 0 ac to 600 ac 45 Hz to 500 Hz 0 ac to 600 ac ±(2 % +10 digits) RISO EN kω to 500 GΩ 200 kω to 500 GΩ ±20 % Nominal alues UN = 230/400 ac f = 50/60 Hz UN = 250 / 500 / 1000 / 2500 dc IN = 1.0 ma [1] 1537 only Operating Uncertainties per EN Parameter Intrinsic uncertainty Position Supply oltage Temperature Operating Uncertainty [1] Confidence level: 95 %. 8 Specification IEC A, Reference conditions IEC E1, Reference Conditions ±90 IEC E2, At low battery voltage stated by manufacture IEC E3, 0 C and 35 C IEC B, 30 % Typical Max[1] 1.63 % 3.68 % 2.29 % 5.00 % 2.80 % 6.09 % 3.36 % 9.83 % 7.30 % %

13 Insulation Tester Principle of Measurement and Resistance Principle of Measurement and Resistance The Tester uses these formulas to measure insulation parameters and display the results: Ohm s Law R = --I Capacitance (Charge) C = Q --- PI (Polarization Index) R 10min PI = R 1min DAR (Dielectric Absorption Ratio) R 1min DAR = R 15s I DD = C I = current after 1-minute discharge DD (Dielectric Discharge) = voltage at moment before discharge C = measured object capacitor Equipment and Environment Before you start the verification procedures or make calibration adjustments, refer to this section for the equipment, system, and setup requirements. See Table 2 for a list of requirements for the verification tests and calibration adjustment. Table 2. Equipment Requirements Equipment Description Recommended Model Used on: erification Calibration Tests Adjustment High oltage Meter 3 k, ±1 % Fluke 5320A and Fluke 8846 Current Source 1 na to 50 na, ±5 % 50 na to 400 μa, ±1 % Keithley 6220 Capacitors 0.1 μf, 3 k, ±10 % 2 μf, 3 k, ±10 % WIMA SNMKP Series X X Calibrator DC voltage: -600 to 600 Accuracy: ±0.5 % AC voltage: 0 to Hz to 500 Hz Accuracy: ±0.5 % OHM: 0 kω to 60 kω Accuracy: ±0.5 % Fluke 5522A X X Resistors 200 kω to 50 GΩ, 3 k, ±1 % 500 GΩ, 3 k, ±5 % Combinations of: OHMITE Slim-Mox Series and Ultra-Mox Series X PC With serial communication software Recommended software: Tera Term X USB Cable (1537 only) USB A to mini B Fluke PN X Probe Fixture (1535 only) See Figure 1. X X X X 9

14 1535/1537 Calibration Manual 3.3 UART GND RXD_IN TXD_OUT 12+ GND Figure to Probe Fixture Connection Calibration Procedure The recommended calibration cycle for this product is 1 year. Or, calibrate the Product if it fails any performance test in the verification procedure. Before you do the calibration: 1. Make sure that you have the required equipment. See Table 2. a. For 1537, make sure the Product battery is good or replace it if necessary. b. For 1535, remove the batteries and calibration seal of the unit under test (UUT) and reassemble the UUT on the probe fixture and power up the fixture. 2. Make sure the USB driver is correctly installed on the PC: a. For 1537, connect the unit under test (UUT) to PC with the USB cable. b. For 1535, connect the probe fixture to PC with USB cable Use proper serial communication software to send calibration commands, set the baud rate to 9600 bps. Set up the software and make sure a carriage return byte and a line feed byte are sent after each command. 4. Warm up the Calibrator as necessary. Refer to the specifications of the Calibrator. 5. Let the temperature of the unit under test (UUT) become stable to room temperature.

15 Insulation Tester Calibration Procedure To do the calibration: 1. Turn on the meter. 2. To check the connection, use the PC and serial communication software to enter these commands: Command Operation / Purpose Response id Check the connection and unit ID The ID information of UUT 3. To calibrate the Current function, use the PC and serial communication software to enter these commands: Command Operation / Purpose Response Connect the current source between E and G cal start_current Enter Current calibration mode cal start_current irs 4 Enter 200 na range irs Current source outputs -1 na adc i r Read the Current analog-to-digital conversion value ADC_READ current_adc cal_param current ADC_READ Write the calibration parameter 0, use read value current param Current source outputs -5 na adc i r Read the Current analog-to-digital conversion value ADC_READ current_adc cal_param current ADC_READ Write the calibration parameter 1, use read value current param Current source outputs -50 na adc i r Read the Current analog-to-digital conversion value ADC_READ current_adc cal_param current ADC_READ Write the calibration parameter 2, use read value current param Current source outputs -150 na adc i r Read the Current analog-to-digital conversion value ADC_READ current_adc cal_param current ADC_READ Write the calibration parameter 3, use read value current param irs 3 Enter 2 μa range irs Current source outputs -250 na adc i r Read the Current analog-to-digital conversion value ADC_READ current_adc cal_param current ADC_READ Write the calibration parameter 4, use read value current param Current source outputs -1.5 μa adc i r Read the Current analog-to-digital conversion value ADC_READ current_adc cal_param current ADC_READ Write the calibration parameter 5, use read value current param irs 2 Enter 20 μa range irs Current source outputs -2.5 μa adc i r Read the Current analog-to-digital conversion value ADC_READ current_adc cal_param current ADC_READ Write the calibration parameter 6, use read value current param Current source outputs -19 μa 11

16 1535/1537 Calibration Manual adc i r Read the Current analog-to-digital conversion value ADC_READ current_adc cal_param current 7-19 ADC_READ Write the calibration parameter 7, use read value current param irs 1 Enter 200 μa range irs Current source outputs -25 μa adc i r Read the Current analog-to-digital conversion value ADC_READ current_adc cal_param current 8-25 ADC_READ Write the calibration parameter 8, use read value current param Current source outputs -190 μa adc i r Read the Current analog-to-digital conversion value ADC_READ current_adc cal_param current ADC_READ Write the calibration parameter 9, use read value current param irs 0 Enter 2 ma range irs Current source outputs -250 μa adc i r Read the Current analog-to-digital conversion value ADC_READ current_adc cal_param current ADC_READ Write the calibration parameter 10, use read value current param Current source outputs -400 μa 12 adc i r Read the Current analog-to-digital conversion value ADC_READ current_adc cal_param current ADC_READ Write the calibration parameter 11, use read value current param cal stop_current Stop the Current calibration cal stop_current cal_param save Save the calibration parameters params saved

17 Insulation Tester Calibration Procedure 4. To calibrate the PWM function, use the PC and serial communication software to enter these commands: Command Operation / Purpose Response Connect the high voltage meter between L and G cal start_pwm Enter PWM calibration mode cal start_pwm pwm 0 Set PWM ratio to 0 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm 0 0 _READ ADC_READ Write the calibration parameter 0, use measured value _READ and read value ADC_READ in the previous two steps pwm param pwm 7.3 Set PWM ratio to 7.3 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm _READ ADC_READ Write the calibration parameter 1, use measured value _READ and read value ADC_READ in the previous two steps pwm param pwm 69.5 Set PWM ratio to 69.5 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm _READ ADC_READ Write the calibration parameter 2, use measured value _READ and read value ADC_READ in the previous two steps pwm param pwm 71.3 Set PWM ratio to 71.3 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm _READ ADC_READ Write the calibration parameter 3, use measured value _READ and read value ADC_READ in the previous two steps pwm param pwm 73.0 Set PWM ratio to 73.0 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm _READ ADC_READ Write the calibration parameter 4, use measured value _READ and read value ADC_READ in the previous two steps pwm param pwm 74.8 Set PWM ratio to 74.8 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm _READ ADC_READ Write the calibration parameter 5, use measured value _READ and read value ADC_READ in the previous two steps pwm param pwm 76.5 Set PWM ratio to 76.5 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ 13

18 1535/1537 Calibration Manual adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm _READ ADC_READ Write the calibration parameter 6, use measured value _READ and read value ADC_READ in the previous two steps pwm param pwm 78.2 Set PWM ratio to 78.2 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm _READ ADC_READ Write the calibration parameter 7, use measured value _READ and read value ADC_READ in the previous two steps pwm param pwm 79.9 Set PWM ratio to 79.9 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm _READ ADC_READ Write the calibration parameter 8, use measured value _READ and read value ADC_READ in the previous two steps pwm param pwm 81.5 Set PWM ratio to 81.5 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm _READ ADC_READ Write the calibration parameter 9, use measured value _READ and read value ADC_READ in the previous two steps pwm param pwm 83.1 Set PWM ratio to 83.1 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm _READ ADC_READ Write the calibration parameter 10, use measured value _READ and read value ADC_READ in the previous two steps pwm param pwm 84.7 Set PWM ratio to 84.7 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm _READ ADC_READ Write the calibration parameter 11, use measured value _READ and read value ADC_READ in the previous two steps pwm param pwm 86.2 Set PWM ratio to 86.2 % pwm adjusted Measure the L-G voltage by the high voltage meter, the measured (in olts) is _READ 14 adc hv r Read the H analog-to-digital conversion value ADC_READ pwm_volt_adc cal_param pwm _READ ADC_READ Write the calibration parameter 12, use measured value _READ and read value ADC_READ in the previous two steps pwm param cal stop_pwm Stop the PWM calibration cal stop_pwm cal_param save Save the calibration parameters params saved

19 Insulation Tester Calibration Procedure 5. To calibrate the Capacitance function, use the PC and serial communication software to enter these commands: Command Operation / Purpose Response Connect the 2 μf capacitor between L and E cal start_capacitor Enter Capacitor calibration mode cal start_capacitor Wait 6 seconds at least misc capacitor_finished Query whether or not the capacitor calibration process is finished, if not finished, do this step again yes finished misc capacitor_coef Query calibrated coefficient CAP_COEF cal_param capacitor CAP_COEF Write coefficient capacitor param cal stop_capacitor Stop the Capacitor calibration cal stop_capacitor cal_param save Save the calibration parameters params saved 6. To calibrate the DC function, use the PC and serial communication software to enter these commands: Command Operation / Purpose Response Connect the calibrator between E and G (use DC function) cal start_dmm_vdc Enter DC calibration mode cal start_dmm_vdc Calibrator outputs 0 adc vac_vdc r Read the oltage analog-to-digital conversion value ADC_READ dmm_vdc_adc cal_param dmm_vdc 0 0 ADC_READ Write the calibration parameter 0, use read value dmm_vdc param Calibrator outputs 600 adc vac_vdc r Read the oltage analog-to-digital conversion value ADC_READ dmm_vdc_adc cal_param dmm_vdc ADC_READ Write the calibration parameter 1, use read value dmm_vdc param cal stop_dmm_vdc Stop the DC calibration cal stop_dmm_vdc cal_param save Save the calibration parameters params saved 15

20 1535/1537 Calibration Manual 7. To calibrate the AC function (1537 only), use the PC and serial communication software to enter these commands: Command Operation / Purpose Response Connect the calibrator between E and G (use AC function) cal start_dmm_vac Enter AC calibration mode cal start_dmm_vac Calibrator outputs Hz adc vac_vdc r Read the oltage analog-to-digital conversion value ADC_READ dmm_vac_vdc cal_param dmm_vac 0 10 ADC_READ Write the calibration parameter 0, use read value dmm_vac param Calibrator outputs Hz adc vac_vdc r Read the oltage analog-to-digital conversion value ADC_READ dmm_vac_vdc cal_param dmm_vac ADC_READ Write the calibration parameter 1, use read value dmm_vac param Calibrator outputs Hz adc vac_vdc r Read the oltage analog-to-digital conversion value ADC_READ dmm_vac_vdc cal_param dmm_vac ADC_READ Write the calibration parameter 2, use read value dmm_vac param Calibrator outputs Hz adc vac_vdc r Read the oltage analog-to-digital conversion value ADC_READ dmm_vac_vdc cal_param dmm_vac ADC_READ Write the calibration parameter 3, use read value dmm_vac param Calibrator outputs Hz adc vac_vdc r Read the oltage analog-to-digital conversion value ADC_READ dmm_vac_vdc cal_param dmm_vac ADC_READ Write the calibration parameter 4, use read value dmm_vac param Calibrator outputs Hz adc vac_vdc r Read the oltage analog-to-digital conversion value ADC_READ dmm_vac_vdc cal_param dmm_vac ADC_READ Write the calibration parameter 5, use read value dmm_vac param Calibrator outputs Hz 16 adc vac_vdc r Read the oltage analog-to-digital conversion value ADC_READ dmm_vac_vdc cal_param dmm_vac ADC_READ Write the calibration parameter 6, use read value dmm_vac param cal stop_dmm_vac Stop the AC calibration cal stop_dmm_vac cal_param save Save the calibration parameters params saved

21 Insulation Tester Calibration Procedure 8. To calibrate the Ohm function (1537 only), use the PC and serial communication software to enter these commands: Command Operation / Purpose Response Connect the calibrator between E and G (use Ohm function) cal start_dmm_ohm Enter OHM calibration mode cal start_dmm_ohm drs 1 Enter 600 Ω range drs Calibrator outputs 0 Ω adc vr_vc r Read the OHM analog-to-digital conversion value ADC_READ dmm_ohm_adc cal_param dmm_ohm 0 0 ADC_READ Write the calibration parameter 0, use read value dmm_ohm param Calibrator outputs 600 Ω adc vr_vc r Read the OHM analog-to-digital conversion value ADC_READ dmm_ohm_adc cal_param dmm_ohm ADC_READ Write the calibration parameter 1, use read value dmm_ohm param drs 2 Enter 6 kω range drs Calibrator outputs 660 Ω adc vr_vc r Read the OHM analog-to-digital conversion value ADC_READ dmm_ohm_adc cal_param dmm_ohm ADC_READ Write the calibration parameter 2, use read value dmm_ohm param Calibrator outputs 6 kω adc vr_vc r Read the OHM analog-to-digital conversion value ADC_READ dmm_ohm_adc cal_param dmm_ohm ADC_READ Write the calibration parameter 3, use read value dmm_ohm param drs 3 Enter 60 kω range drs Calibrator outputs 6.6 kω adc vr_vc r Read the OHM analog-to-digital conversion value ADC_READ dmm_ohm_adc cal_param dmm_ohm ADC_READ Write the calibration parameter 4, use read value dmm_ohm param Calibrator outputs 60 kω adc vr_vc r Read the OHM analog-to-digital conversion value ADC_READ dmm_ohm_adc cal_param dmm_ohm ADC_READ Write the calibration parameter 5, use read value dmm_ohm param cal stop_dmm_ohm Stop the OHM calibration cal stop_dmm_ohm cal_param save Save the calibration parameters params saved 9. To finish the calibration, shut down the unit under test (UUT) and remove all connections. Table 3 is a list of the calibration points and the reference reading values used in the calibration procedure. If any value significantly deviates from the reference range, contact the Fluke Service Center. 17

22 1535/1537 Calibration Manual Table 3. Calibration Points Function Source Setup Calibration Point UUT Range Selection -1 na -5 na -50 na Current Current Source to E-G -1.5 μa -2.5 μa -19 μa -25 μa -190 μa -250 μa -400 μa irs 4 Capacitor DC AC (1537 only) UUT Internal PWM Capacitor to L-E oltage dc to E-G oltage ac to E-G irs 3 irs 2 irs 1 irs 0 NA to to to to to to % 1843 to to % to to % to to % to to to to to to % to to % to to % to to % to to % to to % to to to 2.6 NA 76.5 % 2 μf NA NA NA -100 to to Hz 258 to Hz to Hz 5199 to Hz NA 5187 to Hz 5161 to Hz 5112 to Hz 5028 to Ω 6 kω 6.6 kω 60 kω to to to Ω Resistance to E-G to % 0Ω Ohm (1537 only) -906 to to to % PWM Reference Range of Instrument Readout -418 to na -250 na Reference ADC alue of UUT Readout drs1 drs2 drs3 NA NA -100 to to to to to to NA

23 Insulation Tester Performance erification Performance erification Use the following tests to verify the functions of the Product. If the Product fails any of the performance verification tests, calibration or repair may be needed. For service, see How to Contact Fluke. Before you do the verification: 1. Make sure that you have the required equipment. See Table Make sure the Product battery is good and replace it if necessary. 3. Warm up the Calibrator as necessary. Refer to its specifications. 4. Let the temperature of the unit under test (UUT) become stable to room temperature. 5. erify each test point in Table 4. Table 4. Performance Test Points Test Point Display Reading Function alue Unit Lower Limit Upper Limit Insulation kω Insulation MΩ Insulation GΩ Insulation kω Insulation MΩ Insulation GΩ Insulation MΩ Insulation GΩ Insulation MΩ Insulation GΩ Insulation GΩ Insulation GΩ Capacitor μf Capacitor μf Output oltage No Load Output oltage 250 kω Load Output oltage No Load Output oltage 500 kω Load Output oltage No Load Output oltage 1 MΩ Load Output oltage No Load

24 1535/1537 Calibration Manual Table 4. Performance Test Points (cont.) Test Point Display Reading Function alue 20 Unit Lower Limit Upper Limit Output oltage 2.5 MΩ Load AC 55 Hz AC 45 Hz AC 150 Hz AC 500 Hz DC DC DC DC DC OHM 0 Ω -1 1 OHM 10 Ω OHM 30 Ω OHM 500 Ω OHM 1000 Ω OHM 5000 Ω OHM 10 kω OHM 60 kω

25 Insulation Tester Maintenance Maintenance There are no user-replaceable parts inside the Tester. XW Warning To prevent a possible electrical shock or personal injury: Do not repair or service the Product beyond what is described in this manual. Have an approved technician repair the Product. Cleaning Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents to clean the Tester. Battery Replacement To replace the batteries: 1. Turn off the Product and remove all test leads. 2. Turn the two battery-door latches until the unlock symbol ( ) aligns with the slot. See Figure Lift off the battery door. 4. Remove the AA batteries and replace with new batteries. Use the correct battery orientation. 5. Install the battery door. 6. Turn the battery-door latch until the slot is vertical to the unlock symbol ( ). Figure 2. Battery Replacement 21

26 1535/1537 Calibration Manual Replacement Parts Table 5 is a list of replacement parts. To order parts, see How to Contact Fluke. Table 5. Replacement Parts Item 22 Description Fluke Part or Model Number Soft Carrying Case Batteries (set of 8 AA, Alkaline IEC LR6) USB Cable (1537 only) Test Lead set, 5 k Banana Plug, Red/Black/Green Test Probe, Banana Jack, 4mm Tip, Black Test Probe, Banana Jack, 4mm Tip, Red Alligator Clip Black Alligator Clip Green Alligator Clip Red k Clamp (Red/Black/Green) PC software CD (1537 only) Quick Reference Card

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