Amprobe ACD-51HP Power-Quality-Clamp-Ons - Manual (Page 16)

ACD-51HP - ACD-56HPQ
4.3.2. Frequency measurement (with test leads)
WARNING
• The maximum Voltage input is 600V. Do not attempt to take any voltage
measurements exceeding the limits indicated in this manual. Exceeding
the limits could cause electrical shock or damage to the instrument.
• The instrument won’t measure any value less than 1.5V.
Fig. 6: frequency measurement with test leads
1. Select the “
V ” position.
2. Press the FUNC key to select the Hz function (in AC mode). Press the FUNC
key again to return to the voltage measurement function.
3. Insert the red plug into V/ Ω jack and the black plug into the COM jack. For ease of use,
attach the rubber holster and insert a test lead (see Fig. 3).
4. Connect the test leads to the circuit under test (see Fig. 6). The measured frequency
value is displayed.
5. The "
O.L
" symbol indicates a voltage higher than the full-scale capability of the
instrument.
6. If the display is difficult to read, press D-H key to hold the measured value. To disable
this function press the D-H key again.
7. If the measurement is being performed in a dark environment, press the key for at
least 1 second to activate the backlight. It automatically turns OFF after 5 seconds.
By pressing and holding the MAX/MIN/PK key for at least 1 second, the instrument
enables the maximum (MAX), minimum (MIN), average (AVG) and peak (PK)
measurement recording mode. All of these values are continually updated even if only one
is shown. Momentary MAX/MIN/PK keystrokes will cycle the display through these
recorded values with their corresponding frequencies. To disable this function press and
hold the MAX/MIN/PK key for at least 1 second or turn the selector to any other position.
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