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9. Clamp Jaws

Detect AC current flowing through the conductor on test.

10. Trigger

Press the lever to open the clamp jaws. When the lever is released, the jaws will
close.

11. Other Functions
Auto Power Off 

Automatic power-off extends the life of the battery by turning the meter off after
approximately ten minutes of inactivity. To Turn the meter back on, simply push
the range button, or turn meter off then back on.

1.2 Unpacking and Inspection

Before unpacking the clampmeter, examine the shipping carton for any sign of
damage. Unpack and inspect the clampeter and any associated leads for dam-
age. If there is any damage then consult your distributor immediately.

Upon removing your new Digital Clamp Meter (DCM) from its packaging, you
should have the following items:

1. Digital clampmeter
2. Test lead set (one black, one red)
3. 9-Volt battery (installed in meter)
4. Instruction manual 
5. Protective carry case 

If any of the above items are missing, please contact your distributor immediately.

1.3 REPLACING THE BATTERY

WARNING

To avoid electrical shock, disconnect the test leads 

and any input signals before replacing the battery.

Replace only with same type of battery.

4

AC Volts 

(Average sensing RMS indicating)

Frequency Response: 50Hz to 300Hz

Overload protection: 1000V DC or 750V AC rms

AC Current 

(Average sensing RMS indicating)

Overload Protection: 1200A for 60 seconds Maximum

Continuity Test

Overload Protection: 500V DC or AC rms

Range

Resolution

Accuracy

Input Impedance

3.2V

32V

320V
750V

1mV

10mV

100mV

1V

±(1.5% rdg+4d)

±(1.5% rdg +1d)
±(1.5% rdg +1d)
±(1.5% rdg +1d)

11M

/ 20PF

10M

/ 20PF

10M

/ 20PF

10M

/ 20PF

Range

Resolution 

Accuracy (50Hz-60Hz)

32A

320A

1000A

10mA

100mA

1A

0-600A±(1.5% rdg+5d)50-60Hz

>600A±(2.0% rdg+5d)50-60Hz

0-600A±(3.0%rdg+5d)61-400Hz

>600A±(3.5%rdg+5d)61-400Hz

Range

Audible Threshold

Response Time

Test Current

320

Less than 20

Approx. 500ms

<0.7mA

Summary of Contents for CM56

Page 1: ...rom Martindale Martindale Electric Company Limited Metrohm House Penfold Trading Estate Imperial Way Watford WD24 4YY UK Tel 44 0 1923 441717 Fax 44 0 1923 446900 E mail sales martindale electric co u...

Page 2: ...een constructed Particular attention should be paid to these warnings the precautions the technical specifications and the use of the CM56 in dry surroundings Always inspect your clampmeter test leads...

Page 3: ...Information 5 3 Operation 6 3 1 Voltage Measurement 6 3 2 Current Measurement 7 3 3 Resistance Measurement 8 3 4 Continuity Testing 9 3 5 Diode Testing 9 3 6 Frequency Measurements 9 4 Maintenance 10...

Page 4: ...s designed for use in the laboratory field servicing and any circumstance where high current measurement is required The clampmeter incorporates a finger guard which ensures the safety of the user whi...

Page 5: ...use this function select the current range and press the PEAK button The PEAK indicator will appear on the display When the instrument detects current the peak value will be displayed and held in the...

Page 6: ...9 Volt battery installed in meter 4 Instruction manual 5 Protective carry case If any of the above items are missing please contact your distributor immediately 1 3 REPLACING THE BATTERY WARNING To a...

Page 7: ...ing Electrical noise or intense electromagnetic fields in the vicinity of the equipment may disturb the measurement circuit Measuring instruments will also respond to unwanted signals that may be pres...

Page 8: ...y voltage measurements if the voltage is above 1000V DC or 750VAC These are the maximum voltages that this instrument is designed to measure The COM terminal potential should not exceed 500V measured...

Page 9: ...2 Repair Service There are no user serviceable parts in this unit Return to Martindale Electric Company Ltd if faulty Our service department will quote promptly to repair any fault that occurs outsid...

Page 10: ...uit and from the input terminals of the clampmeter 3 5 DIODE TESTING 1 Set the position by turning the rotary switch and press the RANGE button to enter Diode testing 2 Follow steps 2 4 as for resista...

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