10
5.3.
PROTECTION
The MODEL DC80L calibrator uses two protection fuses, rated 125 mA / 250 V,
internally connected in series with the current terminals (2) and (4).
To avoid personal injury or damage to the calibrator, use only 125 mA / 250 V fast
fuses.
Notes on fuses:
-
Fuse 1 is probably blown out when the display flashes the message OL while
in Voltage output mode with the leads removed from the calibrator.
-
Fuse 2 is probably blown out if the calibrator reads 0.000 in mA input mode,
even under the presence of a current input signal
5.4.
MODEL DC80L OPERATING INSTRUCTIONS
DC mV and V measurements
1.
Press the power switch to
turn on the Calibrator.
2.
Press the INPUT / OUTPUT
mode key to select INPUT
mode.
3.
Press the V/mV mode key
to select mV input .
4.
Plug the red test lead to “V” jack
and the black one to the
“COM” jack .
5.
Connect the test leads
according to the signal polarity:
red to the positive polarity, black
to the negative polarity (GND).
6.
Measurement value is shown on
the display .