E N G L I S H
24
electrical noise and floating capacity of
the test leads.
Therefore, directly connect the object to be
measured to the input terminals.
Temperature (Temp) Measurements
[Model UD179 only]
The meter comes with temperature reading
either in Centigrade or Fahrenheit degrees
preset at the factory. The reading mode can
be changed only at the factory.
The SELECT function is not available in
Temperature mode.
WARNING: DO NOT APPLY THERMOCOUPLE
TO CIRCUITS EXCEEDING 30V RMS, 42.4V PEAK OR
60V DC.
Be sure to insert the banana plug K-type
temperature bead probe (supplied) with
c – polarities. You can also use a
thermocouple probe adapter (Optional) to
adapt other standard K-type temperature
probes.
Current Measurements
( , , 10 )
Current is the flow of electrons through a
conductor. To measure current, you must
open the circuit under test, then place the
meter in series with the circuit. The available
current ranges are : 400.0 μA, 4000 μA, 40.00
mA, 400.0 mA, 4.000 A, and 10.00 A. The
meter defaults at DC. Press SELECT button
momentarily to select AC.
WARNING: NEVER ATTEMPT AN IN-CIRCUIT
CURRENT MEASUREMENT WHERE THE OPEN-
CIRCUIT POTENTIAL TO EARTH IS GREATER THAN
1000V. YOU MAY DAMAGE THE METER OR BE
INJURED IF THE FUSE BLOWS DURING SUCH A
MEASUREMENT.
CAUTION: CHECK THE METER FUSES BEFORE
MEASURING CURRENT. USE THE PROPER
TERMINALS, FUNCTION, AND RANGE FOR CURRENT
MEASUREMENTS. NEVER PLACE THE PROBES IN
PARALLEL WITH ANY CIRCUIT OR COMPONENT
WHEN THE TEST LEADS ARE PLUGGED INTO THE
CURRENT TERMINALS.
To measure DC or AC current
1. Turn-off power to the circuit and discharge
all high-voltage capacitors.
2. Insert the black lead into the COM terminal
and the red lead into an appropriate input
terminal for the measurement range as the
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