Amprobe AC68C Clamp-Multimeter User Manual
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Peak Hold Button: Toggles on and off. Captures the maximum
peak value of a current or voltage surge (motor start-up). “PEAK”
is shown on LCD.
Data Hold Button: Toggles on and off. Holds reading for all
functions and ranges. Always release HOLD before taking a new
measurement. “HOLD” is shown on LCD.
DCA ZERO Button: Push this button to zero the display before
measuring DC current.
Input Terminals: Always connect black test lead (negative) to
black COM input jack and red test lead to red “V
Ω” input jack for
voltage, frequency, resistance, continuity, and diode
measurements
Measuring Procedures
General
1.
Make sure that the selected function and range are
suitable for the measurement to be taken.
2.
If the measured current is higher than the selected range
for a longer period of time, overheating may occur,
compromising the safety and operation of inner circuits.
3.
Do not measure currents on high voltage conductors
(> 600 V) to avoid risks of discharge and/or incorrect
readings.
4.
When measuring current, make sure that the test leads are
removed from the meter terminals.
5.
The most accurate current reading will be obtained by
placing the conductor in the center of the jaws (aligned
with the centering marks on the transformer jaws).
DC Current Measurement
1.
Set the function/range selector to the appropriate A
F
position (400 or 600 A).
2.
Press the DCA ZERO button to make sure that the display
is zero-reading.
3.
Open spring-loaded clamp by pressing the lever on left
side of meter.
4.
Position clamp around one wire or conductor and release
the clamp lever. Make sure that the clamp is entirely
closed. The clamp must be positioned around only one
conductor. If it is placed around two or more current
carrying conductors, the reading is FALSE.
5.
Read the displayed value. The direction of the current
corresponds to the indication of the pointer on the jaw.
Polarity inversion is indicated by a ’-‘ (minus) symbol on
the display.