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Version 1.3 11/12/11
46
C o r p o r a t io n
CALIBRATION OF ANALOGUE SENSORS
SWO can accept most analogue signals from sensors and requires that a
calibration routine be run to set both SCALING and ZERO OFFSET of these sensors.
Go to the CONFIGURE Menu and press the Enter Key.
ZERO ERROR
The Zero Error routine should be done
BEFORE
using the “Adjust Level” screen.
The zero error offset is trimmed out on the “Transducer Zero” screen. Make sure that
there is no level in the system or in the tube leading to the transducer.
On the “Transducer Zero” screen press ENTER to edit the data and then DOWN to make
the reading go to “0”. Wait for 5 seconds for the reading to stabilise. Take care when
running this procedure to reduce to the “zero” value slowly as the possibility of running
past is high.
The level readings are averaged so the readings can lag behind the key presses. Always
allow the system to stabilise prior to completing this procedure.
If the value input is lower than Zero a message stating, “VALUE TOO LOW” will appear
on the screen. Press the UP key until a “zero” value appears.
Once completed press ENTER again and back out of the menu to initiate a store of the
“zero” value.
