BB0141NE
ZP-BB04E
MOM200A/600A
13
4 OPErATING INSTruCTIONS
11]
Press resistance button R.
The instrument will interrupt the current
flowing through the test object and en-
ter the calculation mode. After about two
seconds, the resistance reading will appear
on the digital display expressed in micro-
ohms (on model MOM600A) or milliohms
(on model MOM200A). The current flowing
through the test object is interrupted auto-
matically, but the reading remains visible on
the display.
12]
Turn off and disconnect the micro-ohmmeter
from the mains before doing any disconnec-
tion work or moving any cables or wiring.
External measuring instrument
If, for some reason, you want to use an external
measuring instrument to set the measurement cur-
rent, you can connect it to the current shunt. Voltage
across the current shunt is proportional to the mea-
surement current flowing through the test object,
10 mV per 100 A.
Troubleshooting
Fault
Cause
Remedy
Display shows
only a 1 at
left.
Current range set on
instrument has been
exceeded.
If possible, select ano-
ther test current.
Expand the measuring
range using the method
described in section
"Expanded measuring
range".
Poor contact at ends
of sensing cables.
Check the sensing cable
connections.
Thermal
cut-out has
tripped.
Overload.
Wait until the tempe-
rature drops and the
light-emitting diode
goes out.
Mains mini-
ature circuit
breaker has
tripped
Overload or fault in
instrument.
reset the miniature
circuit breaker. If it trips
again, contact service
personnel.
