Amprobe acd-10 TRMS-PLUS User Manual page 9

Measuring Frequency See Figure -2-
Note: Both ammeter and voltmeter can be used for frequency measurement. The
clamp-on Ammeter detects the frequency of the current circulating in the cable
or bus-bar under test (the current must be greater than 1A in the 400A range and
greater than 15A in the 600A range). The Voltmeter detects the frequency of the
voltage applied to the test leads.
1. Set-up for AC current or AC voltage measurement and press the Hz button.
2. Read the frequency value on the display .
� CAUtION
Using the Resistance, Continuity, Diode or Capacitance functions on a live circuit
will produce false results and may damage the instrument. In many cases the
suspected component must be disconnected from the circuit to obtain an accurate
measurement reading.
Measuring Resistance See Figure -4-
1. Set the Function Switch to Ω.
2. Connect the test leads: Red to +, Black to COM.
3. Turn off power to the circuit being measured.
4. Discharge any capacitors that may influence the reading.
5. Connect the test probes across the resistance.
6. Read the display. If 0L appears on the highest range, the resistance is too large
to be measured or the circuit is an open circuit.
testing for Continuity See Figure -5-
1. Set the Function Switch to Ω and press the SELECT button until � is displayed.
2. Connect the test leads: Red to +, Black to COM.
3. Turn off power to the circuit being measured.
4. Discharge any capacitors that may influence the reading.
5. Connect the test probes across the resistance or the two points of test.
6. Listen for the tone that indicates continuity (>10 Ω and < 120 Ω).
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