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M04
Status
The inlet direction signal strength
and the outlet direction signal
strength are displayed. The signal
quality Q is indicated as 00 ... 99. 00
represents the worst signal while 99
represents the best signal. Normally,
the signal quality Q value should be
above 60.
Display of the measured liquid sound
velocity. Normally, this value should
be approximately equal to the value
entered in window M12. If the
difference is too large, this is
probably due to an incorrect value
entered in window M12 or improper
installation of the sensors.
Displays the measured and the
calculated transmission time. The
difference should be as small as
possible. The ratio should be a
maximum of 100 ±3 %. If the
difference is too large, check that the
parameters have been entered
correctly, especially the sound
velocity of the liquid.
Displays the measured ultrasonic
averaging time (unit: µs) and the
delta time of the upstream and
downstream time (unit: ns). The
velocity calculation in the flow meter
is based on the two measured
values. The delta time is the best
indication of whether the device is
running stably. Normally, the
variation of the delta time should be
less than 20 %. If this is not the
case, check whether the sensors are
installed correctly or whether the
parameters have been entered
correctly.
© PCE Instruments
19
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