Amprobe ACD-51HP Power-Quality-Clamp-Ons - Manual (Page 30)

ACD-51HP - ACD-56HPQ
4.3.10.2. Phase detection
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.
Fig. 18: Voltage detection Fig. 19: Voltage detection with rubber cup
1. Select the “
” position.
2. Insert the red plug into V/ Ω jack.
3. Connect the red terminal to the L1 phase conductor (see Fig. 18, 1 st measurement). If
necessary use the rubber cup to insert red test lead (see Fig. 19, 1 st measurement).
4. When an input voltage greater than 80V is detected the buzzer emits a sound and the
symbols “ PH ” is shown on the main display.
WARNING
During this measurement:
• The instrument must be held in the operator’s hand.
• The test lead cable must not be in contact with or near to any voltage
source that, due to instrument sensitivity, can abort the measurement.
WARNING
• The detected voltage is NOT the phase to neutral voltage, but the
voltage between the conductor and the operator who is holding the
instrument. This value can be lower than the phase to neutral voltage.
DON’T TOUCH THE PHASE CABLE IF YOU AREN’T SURE THAT
ANY VOLTAGE IS PRESENT.
• If the operator is insulated from the ground (e.g. insulated floors, shoes
with rubber souls, etc.) the instrument may not measure correctly. We
recommend repeating test at least twice due to verify the rightness of the
obtained result.
EN - 26