VOLTCRAFT CC-421 Bedienungsanleitung Seite 31

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 "CURRENT SOURCE" and the
helipot "CAL.ADJUST" to the leftmost position.
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 24mA max.
d) Set the "POWER" switch to "I" to turn the current calibrator on.
Following a very short initialization period, the measuring device
is ready to operate.
e) Connect the alligator clips of the connecting cable to the test
leads of the multimeter to be calibrated (turned off) and set it to
mADC measurement.
Caution
The test leads of the multimeter to be calibrated
must be connected to the multimeter's current mea-
surement input (observe "+" and "-").
f) A current flow is now indicated on the current calibrator because
the electric circuit is now closed via the connected measuring
device or rather via its shunt (if fuse ok). Adjust the desired cali-
bration current by turning the CAL-ADJUST knob to the right, e.g.
to 19 mA. The value reading is now applied at the output of the
current calibrator.
g) Turn the connected multimeter on and align it, if necessary.
Voltage source
A further special feature of this current calibrator is its capability of
being applied as high-precision adjustable voltage source. For
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