Advantech RS-485 user manual Analog output module calibration, Output module calibration

Chapter 4

Analog output module calibration

The output current of analog output modules can be calibrated by using a low calibration value and a high calibration value. The analog output modules can be configured for one of two ranges: 0-20 mA and 4-20 mA. Since the low limit of the 0-20 mA range (0 mA) is internally an absolute reference (no power or immeasurably small power), just two levels are needed for calibration: 4 mA and 20 mA.

1.Apply power to the ADAM-5510/P31 system including the analog output module for about 30 minutes.

2.Assure that the module is correctly installed and that its configuration is according to your specifications and that it matches the output range you want to calibrate. You can do this by using the ADAM utility software. (Refer to Chapter 5, Utility Software)

3.Connect either a 5-digit mA meter or voltmeter with a shunt resistor (250 Ω, .01 % and 10 ppm) to the screw terminals of the module.

a m m e t e r

Figure 4-18: Output module calibration

4. Issue the Analog Data Out command to the module with an output

ADAM-5000 4-23