Engineering manual - UniSAB III 1.10.8
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001930 en 2021.06
During normal operation the red LED is flashing rather slowly. The green LED is switched on constantly
when the transmitter is in 100% position whereas it flashes quickly when the transmitter is in 0%
position.
Calibration is carried out as follows:
1.
Apply supply voltage minimum five minutes before calibration.
2.
Press the calibration button for five seconds to get the transmitter in calibration mode. The red
LED will change from normal flashing to OFF.
3.
Decrease capacity to minimum and press the calibration button once. The red LED will turn ON.
After a while, the red LED will turn OFF again indicating that the position transmitter is ready for
100% calibration.
4.
Increase capacity to maximum and press the calibration button twice. The red LED will start
flashing quickly. After a while, the red LED will change to normal flash rate indicating that cali-
bration has been completed.
Points 3 or 4 or both may be ignored. Pressing the calibration button for five seconds in calibration mode
will bring the transmitter back to normal operation mode.
The 4-20 mA signal from the transmitter is permanently available. However, during calibration the signal
is based on the default calibration values so it will neither show 0% at minimum capacity nor 100% at
maximum capacity.
Note:
It is possible to return to the default calibration values by pressing the calibration button down for
minimum twenty seconds. However, it is the default values of the transmitter manufacturer which are re-
set. These values may differ very much from the correct values for the compressor. Reset is indicated
by the red and green LED flashing briefly a couple of times.
7.6.3
Software calibration, electrical slide systems
When the capacity position transmitter has been adjusted (see subsection
)
capacity must be further adjusted. It is recommended to introduce a calculation offset of 2% to ensure
that the slide does not collide with the end stops. Collisions will reduce slide motor service life etc.
Select
Setup/Configuration/Calibrate/Position
.
Decrease capacity to minimum. Change
Cap. Zero Adjustm.
so that a value of -2.0% is displayed for
Cap Slide Position
.
If capacity is e.g. 1.5 % and
Cap. Zero Adjustm. = 0.0%
select
Cap. Zero Adjustm. = - 3.5%
.
Increase capacity to maximum. Change
Cap. 100% Adjustm.
so that a value of 102.0 % is displayed for
Capacity
. If capacity is e.g. 100.3% and
Cap. 100% Adjustm. = 0.0%
select
Cap. 100% Adjustm.= 1.7
%
.
Summary of Contents for SABROE Unisab III Control
Page 1: ...UniSAB III control Version 1 10 8 Engineering manual EN...
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