Minebea CSA-528, Instruction Manual

Page: 20 / 34

10 10
３-２-２.Calibration by CALIB input
Procedure1 Connect the instrument and
strain gage type transducer.
Procedure2 To stabilize this unit and the measuring section (load
cell), please make the instrument to
the status of energiging for about 20 min.
Procedure3 Set the strain gage applied transducer in the condition
of the initial load (tare weight).
When the initial load (tare weight) is exceeding ± 0.25
mV/V at the input conversion, cancel the initial load
(tare weight) referring to the paragraph 3-3.
Procedure4 Turn on the "CALIB" switch.
Be able to get the output equivalent to the calibration
value at 0.5 mV/V ± 0.001 mV/V
The output voltage value corresponding to the CALIB
value is calculated from the rated load value, the rated
output value, the maximum load value, and the output
voltage value of the connected strain gage applied
transducer at that time.
Adjust the output voltage value to become the
calculated value by using the
”
SPAN
”
trimmer.
Calucuration example for CALIB equivalent to output
value
The calculation example when the output voltage of
10.000 V is required at the maximum load of 0.34 t in
the condition of using one point of transducer with the
rated capacity 1 t, rated output 3 mV/V.
Rated capacity of transducer (load) 1ton
Rated output of transducer 3mV/V
Max load 0.34ton
Output voltage value at Max load 10.000V
CALIB value 0.5mV/V
(Output voltage value of max load)
(Rated output of transducer)×(Max load)
(Rated capacity of transducer)
3mV/ V×0.34ton
1ton
＝ 1.02mV/V
Zero output adjustment
Span adjustment (output)
Connecting of strain gage
applied transducer
＝
＝
Energiging for 20 min after
power is turned on.