Amprobe ACD-55HPQ Clamp-Meter - Manual (Page 16)

ACD-55HPQ
4.3.3. Measurement of voltage harmonics
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.
• Harmonic voltage measure is active for AC voltage on inputs only.
Fig. 7: voltage harmonic analysis
1. Select the “ Hv “ position.
2. Insert the red plug into V/ Ω jack and the black plug into COM jack. For ease of use,
attach the rubber test lead holster and insert a test lead (see Fig. 3).
3. Connect the test leads to the circuit under test (see Fig. 6). The instrument displays the
Total Harmonic Distortion value of the input signal. The symbol “THD%” is shown on
the display. See chapter 8 for the parameter’s definition.
4. H ↑ and H↓ keys allows the percentage harmonics’ values displaying (from DC to 25 th
order). On the secondary display is shown the order of the harmonic whose percentage
value is displayed on the main display (ex. H3% means third harmonic).
5. Press FUNC key to switch to the absolute harmonics’ values displaying (from DC to
25 th order). On the secondary display is shown the order of the harmonic whose
absolute value is displayed on the main one (ex. H3 means third harmonic).
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 and hold the
key for 1 second to activate the backlight. It automatically turns OFF after 5 seconds.
EN - 12