P-80 echo confidence (V)
a measure of echo reliability. Press “MEAS” to make an ultrasonic
measurement and the updated echo confidence will be displayed. This
feature is useful when aiming the transducer.
LCD display
short pulse
long pulse
display:
## :##
= display of confidence in dB
## : - -
= no long pulses transmitted
0 : E
= pulses transmitted, but no echo - check for faulty
transducer or wiring
H : - -
= submersible transducer submerged (P-23 = 1)
P-81 confidence threshold for short measurement
minimum echo confidence for echoes within 1 meter of transducer.
If echoes are beyond 1 meter or have a confidence under the threshold
level, the short measurement will be ignored and the long measurements
will become valid.
enter threshold (F=10)
Typical usage; if transducer were picking up small unwanted echoes from
close in, increase threshold to a value above that of the echo confidence
(P-80) so that close in echoes are no longer detectable.
P-82 confidence threshold for long measurement
minimum echo confidence for long measurements. If no echo confidences
meet this threshold, a loss of echo condition will prevail.
enter threshold (F=5)
Typical usage; during filling of vessel, material intersects beam path.
Instead of displaying wrong level, increasing threshold to a value above
that of the echo confidence (P-80) will force the HydroRanger I into
fail-safe.
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PL-399 7 – 18
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