Test Products International 163 - Manual (Page 19)

18 19
TEST LEAD TEST LEAD READING READING
µA COM mAµA 0.1µA 3260µA
mA COM mAµA 0.01mA 326mA
10A COM A 0.01A 10.00A
Measurement Procedure:
1. Disconnect power to the circuit to be measured.
2. Plug the black test lead into the COM input jack.
3. Plug the red test lead into the mAµA or A input jack
depending on the value of current to be measured.
4. Set the rotary switch to the µA, mA or 10A function.
5. Connect test leads in series to circuit to be measured.
6. Reconnect power to the circuit to be measured.
7. Read the current on the 163.
e. MEASURING RESISTANCE
WARNING!
Do not attempt to make resistance measurements
with circuit energized. For best results, remove
the resistor completely from the circuit before
attempting to measure it.
NOTE:
To make accurate low ohm measurements, short
the ends of the test leads together and record the
resistance reading. Deduct this value from actual
readings.
Application Notes
When measuring resistance of a motor,
make sure the power is disconnected prior
to testing.
Set up the meter following the steps under
“Measurement Procedure” on page 19, and
then proceed with the following:
• Connect the red test lead to one power
input line of the motor and the black
test lead to the other power input line
of the motor. In most applications if
the reading is OFL, the motor winding
is open.
• Connect the red test lead to the frame
of the motor and the black test lead to
the winding. In most applications if a
reading of 0 Ohms is displayed, the
winding is shorted to the motor frame
(ground).