Output Adjustment Parameters
Sultan Acoustic Wave Series
33
Fill & Empty Damping
Allows the user to define how quickly the unit
responds to changes in the measured level. A low
damping value gives a fast response and a high
damping gives a slow response. The damping limits
are from 0 to 999. Eg: If you set the damping to a
value of 10, the displayed distance will be a rolling
average of the last 10 pulses. The displayed distance
includes the 4-20mA output and the default display
mode value. Generally it is recommended this value
is not lower than 5-10 for fast filling applications.
4mA Adj & 20mA Adj
Whilst the display shows ‘4mA Adj’ or ‘20mA Adj’,
the analog (4-20mA) current output will be forced
to its respective 4mA or 20mA state. The actual
loop current can be measured with an external
meter and calibrated exactly by pressing the UP or
DOWN arrows until the external meter reads exactly
4.000mA or 20.000mA. Pressing the CAL button will
store the calibration in the instruments memory.
Analog
4-20/20-4mA The analog current output of the
instrument can be set to act in the normal (4-20mA) or
reverse (20-4mA). The default condition is 4-20mA,
where the furthest distance from the transducer (low
level) is output as 4mA, and current increases with
filling to the closer (high level) span point of 20mA.
Simulate
(Y/N): Select Y to access measurement simulation
mode. In simulation mode, the UP and DOWN arrow
keys vary the distance on the display. The current
output and any relays used will behave exactly as
they should do if the measured distance (in SPACE
mode without damping) was that shown on the display.
This mode can be used to test correct behavior of
outputs, or externally connected equipment.
Relays
Allows the user to set the relays for switching.
The relays are programmed in a distance from the
transducer face to the position where switching is
required. Relays work in the following manner:
OFF The relay will always remain off
The relays can be programmed to energise (EN) or
de-energise (DEN) depending on the product level in
the vessel being monitored.
FS If FS is selected, the relay will operate as a
fail safe relay. The relay will be energised at
all times and will de-energise if the ultrasonic
switch goes in to failsafe condition or if
anything interferes with the unit’s ability to
keep the relay energised.
See also ‘Relay Functions’ for further information
about the Relay switching on the next page.
Bk Light
Switch on/off LCD backlight
DispChar
Adjust number of characters per line 8 or 12. Some
older units may have an 8 character display only.
V in Chk
The Sultan automatically detects if the input voltage
below 9.5V for 234 wire units and 7V for 2 wire units.
When this mode is active the unit will begin its failsafe
routine and eventually display V fail. When not active
the unit will still display the message ‘Input voltage
too low’.
Output Adjustment settings configure Analog, Relay and communication settings.
You can also adjust the fill and empty damping for smoother mA output readings
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