User manual

1 General Information
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Fig. 2. The rear wall of the analyzer.
Compared to PQM-702 model, PQM-703 analyzer additionally enables the user to:
 measure the transient voltages in the range of ±6 kV with sampling rate from 100 kHz to 10 MHz.
Measuring circuits for transients are independent from the rest of voltage circuits and connected
to voltage inputs L1, L2, L3, N, PE. The analyzer has four measurement channels: L1-PE, PE-
L2, L3-PE and N-PE. Recording time waveforms is done with user-defined pretrigger time and
detection threshold, while the number of recorded samples is up to 20000 per channel (2 ms
for 10 MHz sampling).
 measurement of mains signalling. The user may define two ripple control signal frequencies in
the range 5...3000 Hz, to be monitored by the analyzer. Average values of signals may be
measured and events may be detected after the pre-determined voltage threshold with time
waveform of up to 60 seconds.
1.3 Power supply of the analyzer
The analyzer has a built-in power adapter with nominal voltage range of 90…760 V AC or
127…760 V DC. The power adapter has independent lines (red) marked with letter P (power). To
prevent the power adapter from being damaged by undervoltage, it automatically switches off when
powered with input voltages below approx. 80 V AC (110 V DC).
To maintain power supply to the device during power outages, the internal rechargeable battery is
used. It is charged when the voltage is present at terminals of the AC adapter. The battery is able
to maintain power supply up to 2 h hours at temperatures of -20...+55°C. After the battery is dis-
charged the meter stops its current operations (e.g. recording) and switches off in the emergency
mode. When the power supply from mains returns, the analyzer resumes interrupted recording.