Test Products International 120 - Manual (Page 6)

7 6
MEASUREMENT TECHNIQUES
1. Controls and Functions:
Push Buttons
Turns the 120 on and off.
D/H Activates the Data Hold function.
Rotary Switch
V Used for measurement of DC Volts.
Select best range for the voltage to
be measured.
V Used for measurement of AC Volts.
Select best range for the voltage to
be measured.
Ω Ω Used for measurement of
Resistance and Continuity.
Input Jacks
COM Black test lead connection for all
functions.
V/ Ω Ω Red test lead connection for OHM,
Continuity Buzzer, DCV and ACV
functions.
STEP BY STEP PROCEDURES
a.Measuring DC Volts
WARNING!
Do not attempt to make a voltage
measure-
ment of more than 600V or of a voltage level that
is unknown.
Instrument set-up:
FUNC BLACK RED MIN MAX
TEST LEAD TEST LEAD READING READING
DCV COM V Ω 0.001V 600V
Measurement Procedure:
1. Disconnect power to circuit to be meas-
ured.
2. Plug the black test lead into the COM input
jack.
3 Plug red test lead into V/ Ω input jack.
4. Set rotary switch on 120 to desired range
in DCV function depending on the voltage
to be measured.
5. Connect the test leads to the circuit to be
measured.
6. Reconnect power to the circuit to be meas-
ured.
7. Read the voltage on the 120.