3.2 CURRENT MEASUREMENTS
1. Set the rotary function switch to ACA 1000A Range.
2. Press the trigger to open the clamp jaws and clamp them around a conductor.
Jaws should be completely closed before taking a reading.
3. The most accurate reading will be obtained by keeping the
conductor across the centre of the clamp jaws.
4. The reading will be indicated on the display
5. Reduce the range if set too high until a satisfactory best resolution
reading is obtained.
Peak Button
This function is used to measure the peak value of an AC current signal. To 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 internal memory. To cancel the
function, press the PEAK button once again.
Hold Button
Press (HOLD) to toggle in and out of data hold mode. In the data hold mode, the
"HOLD" indicator is displayed and the last reading is frozen on the display. Press
the (HOLD) button again to exit and resume taking readings.
4. MAINTENANCE
Maintenance consists of periodic cleaning and battery replacement.
The exterior of the instrument can be cleaned with a dry clean cloth
to remove any oil, grease or grime. Never use liquid solvents or
detergents.
Repairs or servicing not covered in this manual should only be
performed by qualified personnel.
4.1 Cleaning
The CM56 may be cleaned using a soft dry cloth. Do not use abrasives,
solvents, or detergents, which can be conductive. Allow to dry completely
before using.
4.2 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 outside the guarantee period.
Before the unit is returned, please ensure that you have checked the unit and
associated leads thoroughly for flat batteries (check & replace), blown fuses
(check & replace) and other poor connections.
4.3 Storage Conditions
The clampmeter should be kept in warm dry conditions away from direct sources
of heat or sunlight, and in such a manner as to preserve the working life of the
unit. It is strongly advised that the unit is not kept in a tool box where other tools
may damage it.
5. WARRANTY
The CM56 is guaranteed against faults in manufacture and materials for 24
months from date of invoice and will be rectified by us free of charge, provided
the unit has not been tampered with and is returned to us with its housing
unopened. Damage due to dropping, abuse or misuse is not covered by this
guarantee. Batteries and fuses are not covered by this guarantee.
7
10
WARNING
The clamp jaws are designed to take current measurements on circuits
with a maximum voltage difference of 500VAC between any conductor
and ground potential. Using the clamp jaws for current measurements
on circuits above this voltage may cause electric shock, instrument
damage and / or damage to the equipment under test. Before
measuring current, make sure that the test leads are removed from the
instrument.
The clamp jaws are overload protected up to 500VAC for up to 1 minute.
Do not take current readings on circuits where the maximum current
potential is not known. Do not exceed the maximum current that the
instrument is designed to measure.
