Fluke 36 Service Manual

36 AC/DC T rue Rms

Clamp Meter

Service Information

WWarning

Do not service the Meter unless you are qualifi ed to do so. The service information provided in this document is for the use of qual ified personnel only.

To avoid electrical shock or personal injury: Al w ays remove the test leads and input signals from the Meter bef ore openi ng t he case.

Use caution when working with vol t ages above 60V dc or 30V ac.

WWarning

To avoid false readings, which could l ead t o possi ble electric shock or personal injury, replace the battery as soon as the bat tery indicator appears.

The Meter is protected throughout by double insulati on or rei nf orced insulation. When servicing the Meter, use only specified replacement parts.

This Meter contains parts that can be damaged by stat i c discharge. Follow the standard practices for handling stati c sensitive devices.

Introduction

This Service Information document provides the following service information for the 36 AC/DC True Rms Clamp Meter (hereafter referred to as the Meter):

• Product specifications

• Required equipment

• Performance test procedure and test values

• Preparing for calibration

• Calibration procedure and adjustments

• AC amps test

• Replacement parts

For operating information, refer to the Instruction Sheet that came with the Meter.

Y Caution

Caution

PN 200409 September 1996 Rev. 1, 2/98

36 AC/DC True Rms Clamp Meter

Service

The Meter is warranted to be free from defects in material and workmanship for one year. The warranty does not cover abuse, batteries or fuses, or damage caused by using the Meter outside its rated

specifications or operating environment. The complete warranty statement is in the Meter’s Instruction Sheet.

To contact Fluke, call one of the following telephone numbers: USA and Canada: 1-888-99-FLUKE (1-888-993-5853)

Europe: +31 402-678-200 Japan: +81-3-3434-0181 Singapore: +65Anywhere in the world: +1-425-356-5500

Or, visit Fluke’s Web site at www.fluke.com. To order replacement parts, call 1-800-526-4731.

Outside U.S.A. contact your nearest service center. Service, repairs, and replacement parts are warranted for 90 days.

-276-6196

Product Specif ications

Measurement Accuracy

The accuracy of the Meter is specified for one year after calibration, at 18°C to 28°C (64°F to 82°F), with relative humidity to 90%.

The Meter is true rms sensing and calibrated to the rms value of a sine wave input.

General Specifications

General specifications are shown in Table 1.

Table 1. General Specifications

Maximum voltage and frequency between any terminal and earth ground

Operating Temperature −10°C to +50°C (−14°F to 122°F) Operating Altitude 2,000 meters (6,562 ft) Storage Altitude 10,000 meters (32,808 ft) Storage Temperature −20°C to +60°C indefinite (−4°F to 140°F) Temperature Coefficient 0.05 x (specified accuracy)/°C (<18°C or >28°C; <64°F or >82°F) Electromagnetic Compatibility If RF field ≤ 1.6 V/m, total accura cy = specified accuracy;

Operating Humidity To 30°C (85°F), 95% relative humidity;

Battery Type 9V, NEDA 1604A or IEC 6LR61 Battery Life Alkaline, 60 hours continuous Jaw Size One 3 cm (1.2 inch) conductor, or two 2.46 cm (0.97 inch) conductors Size (HxWxL) 4.5 cm x 9.5 cm x 25 cm (1.77 x 3.75 x 9.8 inches) Safety

600V, 400 Hz

If RF field = 3 V/m, total accuracy = specified accuracy + 3.6% of range To 40°C (104°F), 75% relative humidity;

To 50°C (122°F), 45% relative humidity

UL 3111, Complies with IEC 1010-1 for use in 600V, CAT III locations (industrial)

, TÜV,

Required Equipment

Table 1. General Specifications (cont)

Case Protection IP 30 per IEC 529 MAX Hold Feature Accuracy: add 10 digits to ac and dc specification;

Continuity Beeper on at ≤30Ω;

Rms Settling Time The rms converter has a longer settling time for displays reading <100

True Rms Sensing True rms sensing provides more accurate readings on circuits containing

Acquisition time: 250 ms (ac); 10 ms (dc)

Beeper off at ≥70Ω

counts. The display may read up to 5 digits with no voltage or current inputs.

harmonics or distorted waveforms. An instrument with true rms reading indicates the true heat-providing current, which may cause overheated conductors, connections, breakers, or transformers.

Functional Specifications

Functional specifications are shown in Table 2.

Table 2. Functional Specifications

Function Range Accuracy*

N 1000A

1000A 200A

F 600V

200V

(45-400 Hz)

600A 200A

0-600A, 1.9% Rdg + 4 dgts 600-1000A, 3% Rdg + 3 dgts 0-200A, 1.9% Rdg + 7 dgts

1.0% Rdg + 3 dgts

10-600A, 2% Rdg + 3 dgts

0.5-200A, 2% Rdg + 5 dgts

(45-400 Hz)

600V 200V

1.5% Rdg + 3 dgts

J 200Ω 1.2% Rdg + 5 dgts

N 1000A

1000A 200A

F 600V

200V

(45-400 Hz)

600A 200A

600V 200V

Crest

Factor

1000A

NA NA 1200V rms continuous

2 ≤ CF ≤ 3, add 2% Rdg

≤3 (peak voltage ≤933V) 1200V rms

600A continuous (CF ≤3)

Overload Protectionm

J 200Ω NA 660V rms continuous

* See electromagnetic compatibility spec ification under "General Specifications."

36 AC/DC True Rms Clamp Meter

Required Equipment

Equipment required for the performance test and calibration procedure is shown in Table 3.

Table 3. Required Equipment

Equipment Recommended Model

AC Calibrator Fluke 5700A or 5500A Digital Multimeter (DMM) Any Fluke model Transconductance Amplifier Fluke 5220A Resistor, MF, 31.6Ω, 1% Fluke P/N 296673 Resistor, MF, 34.8Ω, 1% Fluke P/N 343897 Resistor, MF, 61.9Ω, 1% Fluke P/N 305961 50-Turn Current Coil Fluke 5500A/Coil

Performance Test

PWarning

To avoid shock, do not execute the performance tests unless t he M et er is fully assembled.

The performance test verifies that the Meter is working properly and performs to specification. To test each of the Meter’s functions and operating ranges, do the following:

1. Connect the source to the Meter’s VΩ and COM input jacks.

2. Referring to Table 4, put the Meter in the function and range for Function Test number 1 (i.e., the 200V

dc function).

3. Apply the first indicated output (i.e., 20.0V dc) from the source.

4. The reading on the Meter display should be within the low and high values shown (i.e., 19.5 and 20.5,

respectively).

5. Repeat steps 1-4 for each function and range in Table 4. (Tests 9-15 require the 50-Turn Current Coil;

tests 11-15 require the 50-Turn Current Coil and Transconductance Amplifier.)

If the Meter fails to perform within the low-high range indicated for each test in Table 4, the Meter needs to be calibrated and adjusted, or requires some repair.

Table 4. Performance Test Values

Function

Test

1. DC Volts 200V 5700A or 5500A 20.0V dc 20.0V 19.5V 20.5V

2. AC Volts 200V 5700A or 5500A 200V at 50, 60, & 400 Hz 200.0V 196.7V 203.3V

Meter

Range Source Output Measured Low High

100.0V dc 100.0V 98.7V 101.3V

−200.0V dc −200.0V −202.3V −197.7V

3. DC Volts 600V 5700A or 5500A −600V dc −600V −609V −591V

4. AC Volts 600V 5700A or 5500A 100V at 50, 60, & 400 Hz 100 95 105

5. AC Volts MAX Hold

600V 5700A or 5500A 100V at 60 Hz 100V 85V 115V

Apply voltage. Press MAX button. Remove voltage. Check limits

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