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IM 04L51B01-01EN
Maintenance and Troubleshooting
5
Note
Do not perform any other operations (especially turning the GX/GP off) during calibration.
The GX/GP may malfunction.
5.1.4 Calibrating the D/A of AO Modules and Adjusting the Output Accuracy
Required Instruments
To adjust AO modules, you need calibration instruments with the following specifications and
accuracy.
• Resistance standard : Resisitance value: 600 Ω or less
Accuracy: ±0.01% or more
Allowable power: 0.25 W or higher
Temperature coefficient: 5ppm/°C or less
• Digital Multimeter : Accuracy: ±0.01% or more
For information on purchasing these calibration instruments, contact the YOKOGAWA dealer that you
purchased the GX/GP from.
Preparing the Instruments
1
Wire the channel of the AO module to be calibrated and the calibration instruments as
shown in the following figure, and adequately warm up the instruments (the warm-up
time of the GX/GP is at least 30 minutes).
2
Check that the operating environment such as ambient temperature and humidity is
within the standard operating conditions. (See the general specifications.)
Operation complete
–
CH1 output terminal
+
Digital multimeter
.
Resistor
–
+
CH1 output terminal
Digital multimeter
Current input terminal
.
Wiring for current measurement
Wiring for voltage measurement
5.1 Maintenance
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