User Manual

Calibration

ADAM 4000 Series User’s Manual

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

value of 4 mA.

5. Check the actual output value at the terminals. If it does not equal

to 4 m A, use th e “Trim ” op tion in th e “Calib rate” su b m enu to

change th e actu al ou tput. Trim th e module un til th e millimeter

indicates e xactly 4 m A. In t he ca se of using a voltage meter with

shunt resistor, the voltage meter should indicate exactly 1 V. (When

calibrating fo r 20 m A u sing vo ltage m eter and shu nt resistor, t he

correct voltage would be 5 V.)

6. Issue th e 4 mA Calibratio n command to indicate that the ou tput is

calibrated. The calib rated parameters sho uld be stored i n th e

modules EEPROM.

7. Execute an Analog Data Out command with an output value of 20

mA, and the output will approximately be 20 mA.

8. Continue executing the Trim Calib ration command until the output

current is equal to exactly 20 mA.

9. Execute the 20 mA Calibration command until th e present output is

exactly 20 m A. The analog output m odule will store its c alibrated

parameters in EEPROM.