Test Products International 291 - Manual (Page 12)

13 12
2. Step by Step Procedures:
a. Measuring DC Volts
WARNING!
Do not attempt to make a voltage measurement of
more than 600V or of a voltage level that is unknown.
Instrument set-up:
FUNC. BLACK RED MIN MAXI
TEST LEAD TEST LEAD READING READING
V COM V/ Ω 0.1mV 750V
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 the V/ Ω input jack.
4. Set rotary switch to the appropriate V range.
5. Connect test leads to circuit to be measured.
6. Reconnect power to circuit to be measured.
7. Read the voltage on the 291.
Optional Modes
• HOLD:
Freezes the reading on the LCD.
• PEAK: Measures the peak voltage.
!
Application Notes
When measuring DC Voltage of a bat-
tery, the most accurate reading can be
attained by testing the battery under
load. To accomplish this, follow steps
1 through 4 shown on page 13 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 291.