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2. Step by Step Procedures:
a. Measuring DC Volts
CAUTION!
Do not attempt to make a voltage measurement if
a test lead is plugged in the A or µmA input jack.
Instrument damage and/or personal injury may result.
W
ARNING!
Do not attempt to make a voltage measurement of more
than 1000V or of a voltage level that is unknown.
Instrument set-up:
FUNCTION BLACK RED MINIMUM MAXIMUM
TEST LEAD TEST LEAD READING READING
DCV COM VΩ 0.1mV 1000V
Measurement Procedure:
1. Disconnect power to circuit to be measured.
2. Plug black test lead into the COM input jack.
3 Plug red test lead into VΩ input jack.
4. Set the rotary switch on the 135 to the desired range
in the DCV function depending on the voltage to be
measured.
5. Connect test leads to circuit to be measured.
6. Reconnect power to circuit to be measured.
7. Read the voltage on the 135.
Application Notes
When measuring DC Voltage of a battery, the most accu-
rate reading can be attained by testing the battery under
load. To accomplish this, follow steps 1 through 4 above
and the following (with the battery in holder and device
turned on):
• Connect the red test lead from the meter to the
positive (+) terminal of the battery.
• Connect the black test lead to the negative (-) terminal
of the battery.
• Reconnect power to the circuit and read the voltage on
the 135.
D. MEASUREMENT TECHNIQUES
1. Controls and Functions:
Push Buttons
Turns the 135 on and off.
Data-H Activates the Data Hold function.
Rotar
y Switch
DCV Used for measurement of DC Volts. Select the
best range for the voltage to be measured.
ACV Used for measurement of AC Volts. Select the
best range for the voltage to be measured.
DCA Used for measurement of DC Amps. Select the
best range for the current to be measured.
ACA Used for measurement of AC Amps. Select the
best range for the current to be measured.
OHM Used for measurement of Resistance, Diode Test
and Continuity Buzzer. Select the best range for
the resistance to be measured.
CAP Used for measurement of Capacitance Select the
best range for the capacitance to be measured.
Input Jacks
A Red test lead connection for current measure-
ments on the 2 and 10 ACA and DCA functions.
mAµA Red test lead connection for current measure-
ment on the mA and µA DCA and ACA functions.
COM Black test lead connection for all functions.
V
Ω
Red test lead connection for OHM, DCV and ACV
functions.
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