--- MPC 20 & 50 TESTER - M-981136 (vers. BD) --- Page
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Measurements are taken automatically on turning the key (the
voltmeter and the ammeter begin testing on turning the key and block
measurements when the key is no longer turned).
BEFORE TURNING THE SELECTOR MAKE SURE THAT NO ONE
IS USING THE POWER OR TESTING CIRCUIT.
READ TESTED VOLTAGE (V) on the display.
Note: If the read out on the display is less than 30 V the internal scale is
automatically changed to 30 V AC.
DISENGAGE THE OPERATION SELECTOR Once the test has
finished the values remain displayed until the key is turned again, the
equipment is switched off or the equipment is disconnected.
The MPC-5 will automatically calculate resistance and store the
results.
6.7.- MEASUREMENT RESULTS (THAT WILL REMAIN DISPLAYED)
Real current
of the test made
Im. NN,N Rt :
Voltage tested
during the test
Vm. NN,N NNN.N
Calculated ground
resistance
Rt.= Vm./Im.
Ensure that the measuring electrode is actually testing the voltage drop in
the ground that is being tested which is a consequence of the current injected
by the MPC itself. Placing the measuring electrode in the right position is vital. It
is important that it is far from the area under the influence of both the
measuring electrode and the auxiliary electrode to obtain maximum accuracy.
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