PQM-700 Operating Manual
16
When the meter is switched on and detects full memory,
MEM
LED is lit
– measurements are
blocked, only read-out mode for current data remains active.
When the meter is switched on and fails to detect the micro-SD card or detects its damage,
ERROR
and
MEM
LEDs are lit and measurements are blocked.
If the connection test was successful, after pressing
the meter enters the recording
mode, as programmed in the PC.
To switch the analyzer OFF, keep button
pressed for 2 seconds, when no button or
recording lock are active.
2.4
Auto-off
When the analyzer operates for at least 30 minutes powered by the battery (no power supply
from mains) and it is not in the recording mode and PC connection is inactive, the device automat-
ically turns-off to prevent discharging the battery.
The analyzer turns off automatically also when the battery is fully discharged. Such an emer-
gency stop is preceded by activating BATT LED for 5 s and it is performed regardless of the current
mode of the analyzer. In case of active recording, it will be interrupted. When the power supply
returns, the recording process is resumed.
2.5
PC connection and data transmission
When the meter is switched-on, its USB port remains active.
In the read-out mode for current data, PC software refreshes data with a frequency higher than
once every 1 second.
During the recording process, the meter may transmit data already saved in memory. Data may
be read until the data transmission starts.
During the recording process the user may view mains parameters in PC:
- instantaneous values of current, voltage, all power values, total values for three phases,
- harmonics and THD,
- unbalance,
- phasor diagrams for voltages and currents,
- current and voltage waveforms drawn in real-time.
When connected to a PC, button
is locked, but when the analyzer operates with key lock
mode (e.g. during recording),
button is also locked.
To connect to the analyzer, enter its PIN code. The default code is 000 (three zeros). The PIN
code may be changed using
Sonel Analysis
software.
When wrong PIN is entered three times in a row, data transmission is blocked for 10 minutes.
Only after this time, it will be possible to re-entry PIN.
When within 30 sec of connecting a PC to the device no data exchange occurs between the
analyzer and the computer, the analyzer exits data exchange mode and terminates the
connection.
Note
The
ERROR
and
MEM
LEDs behaves the same way when a new microSD card
has been inserted to the analyzer’s slot. To format the card to be usable with
PQM-700 analyzer the
(START/STOP) button must be pressed. Ana-
lyzer will then confirm start of formatting process with 3 beeps. All the data on
the card will be erased. If the formatting finishes successfully the
ERROR
and
MEM
LEDs will switch off, and the analyzer will be ready for further operation.
Summary of Contents for PQM-700
Page 85: ...85 Notes...
