Test Products International 296 - Manual (Page 19)

19 18
Application Notes
When measuring DC Amps of a motor there
are two types of measurements that can be
made, running current and in-rush or start-up
current. Start-up current will usually be much
higher than running current.
Set up the meter following the steps under
“Measurement Procedure” on page 18, and
then proceed with the following:
• Clamp the meter around a single wire
and reconnect power to the device. Read
the current displayed on the meter. This
is the running current of the motor.
• Disconnect power to the motor and put
the meter in PEAK HOLD mode.
Reconnect the power and read
the current displayed on the
meter. This is the in-rush or
start-up current
of the motor.
d. Measuring DC Amps
CAUTION!
Do not attempt to make a current measurement with the
test leads. The 296 measures the current by clamping
the jaw around one conductor (wire). Clamping around
more than one wire will result in erroneous readings.
Instrument set-up:
FUNC. BLACK RED MIN MAX
TEST LEAD TEST LEAD READING READING
A NOT USED NOT USED 0.1A 700A
Measurement Procedure:
1. Disconnect power to circuit to be measured.
2. Set rotary switch to A function.
3. Press the FUNC button to set to measure DCA.
4. Press and hold the HOLD button until LCD zero’s.
5. Clamp the jaws around one conductor of the circuit
to be measured.
6. Reconnect power to circuit to be measured.
7. Read the current on the 296.
Optional Modes
•
HOLD: Freezes the reading on the LCD.
• RANGE: Manually ranges the instrument.
• REC: Record minimum, maximum and
average values.
• TRIM: Push TRIM button to stabilize reading.