--- MPC 20 & 50 TESTER - M-981136 (vers. BD) --- Page
19
5.11.- ADJUSTING THE CURRENT AND TESTING OF STEP OR TOUCH
VOLTAGE
Turn the key in one of the two directions and keep it there.
BEFORE TURNING THE SELECTOR MAKE SURE THAT NO ONE IS
USING THE POWER OR TESTING CIRCUIT. PREVENT PEOPLE
REMAINING OR PASSING THROUGH THE AREA WHERE THE CURRENT
IS TO BE INJECTED BY USING THE APPROPRIATE SIGNS. IN THE EVENT
OF HIGH GROUND RESISTANCES, VOLTAGES UP TO 600 V MAY BE
CREATED, WHICH ARE FATAL TO ANIMALS OR PERSONS NEAR TO THE
DISPERSERS DURING TESTS.
Adjust the current to 20 A with the MPC-20 and 50 A or slightly higher
for the MPC-50:
FINE REGULATOR:
Starting with the switch on position "1", slowly turn the fine regulator towards
the right (from 0% to 100%). To find out the current being injected, the needle
on the analogue ammeter is the guide at first and then the read out lp. on the
digital indicator.
SWITCHING SCALES:
If the nominal current is not reached, even with the regulator on 100%, it will
then be necessary to increase the switch regulation by one scale.
Adjustments are done by trial and error between the different regulation
scales, starting with the lowest: 1 to 10 on the MPC-20 and from 1 to 8 on the
MPC-50. Switching from one scale to another is always done “off line”, i.e.
without turning the selector key and placing the regulator in the 0% position.
Voltage testing will be done AUTOMATICALLY at the same time as
the MPC-20 or MPC-50 are adjusted with the operating key. (The voltmeter
begins testing when the key is turned and blocks measurements when the key
is no longer turned.)
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