Minebea CSA-522B, Instruction Manual

Page: 23 / 38

13
4. Function and operation
4-1. Setting of ZERO adjustment
Zero point can be changed by ZERO coarse control switch and ZERO fine control trimmer.
ZERO coarse control switch Variable range by ZERO fine control trimmer
＋
Approx.0.3 mV/V to Approx.0.6 mV/V
0 Approx. -0.3 mV/V to Approx.0.3 mV/V
―
Approx.-0.6 mV/V to Approx.-0.3 mV/V
4-2. Setting of GAIN adjustment
Sensitivity can be changed by GAIN coarse control switch and GAIN fine control trimmer.
GAIN coarse
adjustment switch
Variable range by GAIN
fine control trimmer
Sensitivity
M 0.5 mV/V to 2.0 mV/V Approx. 500 times to Approx. 2 000 times
H 0.35 mV/V to 1.4 mV/V Approx. 750 times to Approx. 3 000 times
L 1.0 mV/V to 4.0 mV/V Approx. 250 times to Approx. 1 000 times
The variable range above mentioned is input conversion to get the output of DC10V.
(When the bridge power supply voltage is set as DC10V.)
4-3. Settng of CALIB value
The voltage or the current corresponding to the CALIB set value (input conversion value) is
output.
CALIB switch Input conversion value to be output
0.25 mV/V 0.25 mV/V
±
0.000 25 mV/V
OFF 0 mV/V
1.0 mV/V
1.0 mV/V
±
0.001 mV/V
4-4. Setting of frequency response
Frequency response can be selectable.
FILTER switch Frequency response Attenuation rate
ON 1 Hz or 30 Hz -12 dB/oct bessel type
OFF 25 kHz -6 dB/oct
The changeover of 1 Hz and 30 Hz at FILTER ON is selected by DIP switch on circuit board.
When both 1 and 2 of DIP1 on the printed cirsuit board turns OFF, 1 Hz is selected.
(The standard is 30 Hz. The setting is that both 1 and 2 of DIP1 turns ON.)
4-5. Setting of bridge power supply voltage
The bridge power supply voltage is selectable.
Please select the voltage value less than the maximum rated voltage of a strain gage applied
transducers.
G.V. switch Bridge power supply voltage
5 V
5 V
±
0.15 V
10 V 10 V
±
0.3 V
2.5 V 2.5 V
±
0.075 V
● Please execute the calibration again when the bridge power supply voltage is changed.