VOLTCRAFT CC-421 Bedienungsanleitung Seite 29

Caution!
If during DC measurements a "-" sign appears before
the measured value, the measured current is negati-
ve (or the test leads are interchanged). Do not mea-
sure currents in electric circuits where voltages grea-
ter than 35 VDC might occur as otherwise your life
might be seriously endangered under unfavourable
circumstances. Never measure currents greater than
24 mA. Only measure currents smaller than or equal
to 24 mA in electric circuits fused by 25 mA, quick
acting.
mA loop current measurement
To measure loop currents in 2-conductor loops up to 24mADC max.
proceed as follows:
a) Connect the connecting cable (flat side of the plug housing down)
with the current calibrator which is turned off. Make sure that the
connection is tightly made.
b) Set the "FUNCTION" switch to "Power / mA MEASURE".
c) Set the "RANGE" switch to the right position for two decimal
positions up to 19.99 mA max. or to the left position for one deci-
mal position and 24 mA max.
d) Open the 2-conductor loop to be measured (see also illustration)
and connect the alligator clips ("+" = red, "-" = black) of the
connecting cable in series to the object under test. The measure-
ment voltage for supplying the loop is generated by the current
calibrator (12 VDC).
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