FAA-26, Technical Manual, Rev. 1.2.0, December 2020
Page
12
of
14
The analogue output value at any loading is
Analogue
Output
= Minimum output +
Maximum output
– Minimum output
x Load
Scale capacity
Example:
Scale capacity
100kg
Output range
4
– 20 mA
Load
25kg
The 4-20mA analogue output current at 25kg is:
I
out
= 4mA + (( 20mA
– 4mA ) / 100kg ) x 25kg = 4 + 0.16 x 25 =
I
out
= 8 mA
The 0
– 10 VDC analogue output voltage will be:
V
out
= 0 + (10V / 100kg ) x 25 kg = 0,1 x 25 =
V
out
= 2.5 VDC
- Increase or decrease the analogue output by gain adjustment rotary
switch to measure the calculated output value above.
- Please make gain adjustment rotary switch
“
0
“ position.
5.2 Adjustment at PLC
All instruments are adjusted in the production to operate in its analogue output range
between 0 mV and 10 mV load cell signal as default (only for 2mV/V load cells).
Current output default adjustment is 4
– 20 mA and Voltage output default range is
0
– 10 VDC .
For example if the instrument is at factory default values and programmed to operate
4
– 20 mA output range, the output will be 4 mA at 0 mV load cell signal (scale
empty) and will be 20 mA at 10 mV load cell signal (max. scale capacity).
Changing the FAA-26 instrument the re-calibration is not required because of
matching instruments in production at Flintec.
5.3 Testing the Scale Performance
You should check your scale performance by testing the scale eccentricity, scale
linearity at loading up to maximum loading value, repeatability etc. before using it
.
