FAA-27, Technical Manual, Rev. 1.1, June 2014
Page 13 of 21
5.2 Fast Adjustment To Nominal Output Range
You may perform fast adjustment method if you will set zero and gain to analog
output nominal values. This feature gives advantage to the instrument for small and
medium capacity weighing systems’ fast and easy adjustment.
Fast Zero Adjustment:
Unload the scale.
Turn the programming switch to
ZF
position.
Turn the Adj. switch to
position and turn it back to
0
- position 2 seconds
later.
Turn the programming switch to analog output type position to start operation
or to
GF
position for gain adjustment.
For example, for 4
– 20mA range and for 100kg capacity scale, unload the scale and
perform fast adjustment to set the output to 4mA.
Fast Gain Adjustment:
Load the scale to the 20% of the maximum capacity (if scale capacity is
100kg, load 20 kg).
Turn the programming switch to
GF
position.
Turn the Adj. switch to
position and turn it back to
“
0
” - position 2 seconds
later.
Turn the programming switch to analog output type position for operation.
For example, for 4
– 20mA range and for 100kg capacity scale, load the scale 20kg
test weight and perform fast gain adjustment to set the output to 7,2mA at this load.
The output will be 20mA at 100kg loading.
5.3 eCal Electronic Adjustment Via xFace Software
The adjustment of high capacity tanks and silos are very difficult in practice and takes
very long time. You may save a lot of time by eCal adjustment by entering theoretical
scale and load cell values to the instrument instead of loading the scale. Due to the
production process of FAA-27, eCal accuracy is very high. Adjustment with eCal is
performed via RS232 port of the instrument and can be comfortable executed with
xFace software. Refer to
for installation and using the software.
For increasing the eCal accuracy you must enter the specific load cell rated output,
which is printed
on “Final Data Summary” attached to every load cell. Using more
than one load cell an arithmetic average of all load cells must be calculated.
