User Manual

Chapter 8
Chapter 8 Calibration
8-13
8.4 Analog Output Calibration
Model: ADAM-4021/4024
The output current of analog output modules can be calibrated by using
a l ow an d high cal ibrating v alue. T he a nalog o utput m odules can be
configured in one of the two ranges, 0-20 mA and 4-20 mA. Since the
low limit of the 0 - 20 mA ranges, 0 mA, is an ab solute reference (no
power, or immeasurably small power). However, just two levels, 4 mA
and 20 mA, are needed for calibration.
1. Apply p ower t o t he analog output m odule and l et i t war m up fo r
about 30 minutes.
2. Assure that the module is correctly installed, and its configuration is
according to your s pecifications. It s hould match the output range
that you w ant to calib rate. You can do t his by using t he ADAM
utility software. (Please refer to Appendix D, Utility Software.)
3. Connect either a 5-digit millimeter or voltmeter with a shunt resistor
(250Ω, 0.01% , and 10ppm) to the screw terminals of the module
Figure 8-6 Setup for Analog Output Calibration