Greyline PSL 5.0, Руководство пользователя

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Page 12
PSL 5.0 Pump Station Level Controller
M R ax ange
4-20 mA input
M R in ange
PZ Sensor
Application
Span
55%
45%
CALIBRATION
Press the

to 
Calibration
and

to enter. Use

or

to position 
before each menu item and

to enter. When settings are completed press

to
store and return to the Calibration menu.
Min Range
Distance from the sensor face to highest expected level.
Max Range
Distance from sensor to Zero level.
Damping
Minimum damping allows fast response to level changes.
Increasing damping slows the PSL 5.0's response to level changes
and is ideal to smooth the display and outputs in turbulent
conditions. Damping value is shown in percent (0-99%). Some
experimentation may be required to select the optimum damping
value. A value of 1% is recommended for most applications. For
fast level changes (up to ½ inch/sec - 13 mm/sec), a Damping
value of 1% is recommended.
LOS Time
Press  and  or  to change the number of seconds without
receiving a level measurement from either the PZ or pressure
sensor before the PSL 5.0 displays ECHO LOSS, and Control
relays change state as calibrated under Relay Parameters.
Factory default is 30 seconds and is recommended for most
applications. Minimum is 1 second and maximum is 99 seconds.
Press
 from the
Units/Mode
display to return to Menu Selections.
IMPORTANT NOTE: If utilizing a redundant (pressure) sensor input with the PSL, care must be taken to
choose an appropriate Min Range and Max Range which matches application conditions. The redundant (pressure)
sensor will automatically and continuously calibrate itself based on the ultrasonic level measurement. This
automatic and continuous calibration only occurs when water levels are moving below 45% and above 55% of the
Application Span. Application Span = Max Range – Min Range. Most field installation issues occur when Min
Range
≠
Max Level of water in the well, but instead matches the deadband of the ultrasonic sensor (typically 16”).
Water must move below 45% and above 55% for
automatic and continuous redundant sensor calibration to
occur.
--Calibration-------
Min Range 8 . 000in
Max Range 80 . 000in
Damping 10%
LOS Time 30s
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