Analytical Industries GPR-2500 Series Oxygen Transmitter User Manual
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Output connection:
The 4-20mA current output is obtained by connecting the current measuring device between the negative terminal
of power source and the negative terminal, marked (-), located in the junction box of the transmitters. The positive
current flow is from pin 1 to pin 2 and from pin 2 to ground through the external load.
To check the signal output of the 4-20mA E/I integrated circuit connect an ammeter, as illustrated below, as the
measuring device and confirm the output is within +0.1mA of 4mA.
Power 12-36V DC
To Transmitters
Terminal Strip
Caution: To assure proper grounding, connect the 4-20mA signal output to the external device (PLC, DCS, etc.)
before attempting any zero or span adjustments.