Fluke 30 Bedienungs- und Montageanleitung

Clamp Meter

Service Information

WWarning

Do not service the Meter unless you are qualified to do so. The service

information provided in this document is for the use of qualified personnel

only.

To avoid electrical shock or personal injury: Always remove the test leads

and input signals from the Meter before opening the case.

Use caution when working with voltages above 60V dc or 30V ac.

WWarning

To avoid false readings, which could lead to possible electric shock or

personal injury, replace the battery as soon as the battery indicator appears.

YCaution

The Meter is protected throughout by double insulation or reinforced

insulation. When servicing the Meter, use only specified replacement parts.

Caution

This Meter contains parts that can be damaged by static discharge. Follow

the standard practices for handling static sensitive devices.

Introduction

This document covers the following topics relating to the calibration of the Fluke 30 Clamp Meter,

hereafter referred to as the meter:

• Required Test Equipment

• Assembly/Reassembly

• Calibration Adjustments

• Performance Check

Service

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: +65-*-276-6196

Anywhere 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.

Clamp Meter

Required Equipment

Table 1 lists the equipment required to perform the calibration procedure.

Table 1. Calibration Equipment

Instrument Type Recommended Model

AC Calibrator Fluke 5700A

Transconductance Amplifier Fluke 5220A

Digital Multimeter Fluke 77

Lab Supply (0-10V)

Resistor (MF, 30.1 ohms, 1%) Fluke PN 296665

Resistor (MF, 27.4 ohms, 1%) Fluke PN 296368

50 Turn Current Coil 5500A coil

Preparing for Calibration

1. Configure the test equipment as shown in Figure 1.

2. Disassemble the meter by removing the four screws on the case back.

3. Remove the battery cover and front panel.

4. Turn on the meter and use a DMM to verify that the battery level is between 7 and 9 volts. If the battery

does not meet this criteria, replace the battery before proceeding with the calibration procedure.

Note

The test equipment should be allowed to warmup and stabilize for at least 30 minutes before

starting the calibration checks.

Calibrator

5700A/5720A 5500A

5220A

5500A Coil

20V PK

MAX

TRIG

OUT

1000V

RMS

MAX

20V

RMS

MAX

1V PK

MAX

20V PK

MAX

NORMAL AUX SCOPE

V, ,

RTD A, -SENSE,

AUX V 200V PK

MAX

Conductor

HOLD

200A

400A

200V

OFF

200

600V

COM

rq2f.eps

Figure 1. Calibration Equipment Configuration

Calibration Adjustments

Complete the following procedure to calibrate the meter. Refer to Figure 2 for the adjustment locations.

AC Voltage Calibration

1. Set the meter to the 200V AC range. Connect the calibrator to the input of the meter, and program the

calibrator to 100V AC at 60 Hz. Adjust VR3 to indicate “100.0” on the display.

2. Set the calibrator to 0V and set the meter to the 600V AC range. Set the calibrator to 600V AC at

60 Hz, and verify that the display reading is within the tolerance specified in Table 2.

AC Current Calibration

1. Set the calibrator to 3.8 amps at 60 Hz.

2. Set the meter to the 200A AC range. Clamp the meter around the 5500A coil as shown in Figure 1.

Center the jaws on the coil using the indicator marks on the jaws of the meter and adjust VR2 to

indicate “191.0” on the display (adjusting to 191.0 amps ensures that the clamp meets accuracy

specifications where response roll-off occurs).

3. Set the meter to the 400A AC range and set the calibrator to 7A AC at 50 Hz. Verify that the display

reading is within the tolerance specified in Table 2. If the value is out of tolerance, balance the

calibration between the 200A and 400A ranges so that both ranges fall within the tolerance specified in

Table 2.

Ohms Calibration

The ohms ranges are not adjustable.

Continuity Beeper Calibration

Connect a 30.1eresistor across the meter’s input terminals, and turn VR4 slowly until the beeper sounds.

VR2

VR3

VR4 VR1

VR2

VR3

VR1

VR4

rq3f.eps

Figure 2. Calibration Adjustment Locations

Low Battery Indication Calibration

1. Disconnect the battery from the meter, and connect the lab supply to the battery terminals. Set the

power supply to 6.7V, and turn on the meter. Slowly adjust VR1 until the low battery indicator

appears.

Clamp Meter

2. Set the power supply to 7.0V, and verify that the low battery indicator goes off.

Reassembly

1. Press and release the hold switch (so the switch is down), and fit the button over the switch housing.

2. Set the mark on the function switch axis to the 200V AC position (horizontal position), see Figure 4.

3. Set the rotary switch on the front panel to the 200V position.

4. Reinstall the front panel, making sure the wires surrounding the PCB are not caught between the front

and back case halves.

5. Reinstall all but the battery cover screw (three screws) on the case back.

6. Reinstall the battery and battery cover. Then secure with the battery cover screw.

Performance Check

To perform a performance check on the meter, set up the test equipment as shown in Figure 1. Referring to

Table 2, set the 5700A calibrator controls as shown, and verify that the meter readings fall between the high

and low limits for each range.

Table 2. Performance Test Measurement Points

5700 Settings Range Low Limit High Limit

Current AC Freq. Hz

20A 60 200A 18.8A 21.2A

190A 60 200A 187.3A 192.7A

40A 60 400A 36A 44A

350A 50 400A 342A 358A

400A 60 400A 388A 412A

Volts AC Freq. Hz

20V 60 200V 19.5 20.5

190V 60 200V 187.4V 192.6V

60V 60 600V 56V 64

600V 60 600V 590V 610V

Resistance Ω

190ΩNA Ohms 186.9Ω193.1Ω

To verify the continuity beeper, connect a 27.4Ωresistor (PN 296368) across the input terminals and verify the beeper

sounds.

VR2

VR3

VR2

VR3

VR2

VR3

HOLD SWITCH

FUNCTION SWITCH

HOLD

200V

rq4f.eps

Figure 4. Rotary Switch Position

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