Output Calibration; Table 5-7 Output Calibration Procedure - Honeywell 7866 Operation And Maintenance Manual

5.6

Output Calibration

Introduction
You can calibrate the controller so that the PV output provides the desired milliampere output when read
through a meter connected to the desired output terminals.
Before doing an output calibration, make sure the PV current output type (CUR OUT) selection in the Unit Set Up
group (Table 4-2) is configured properly for either 4-20 mA or 0-20 mA. This selection must agree with what you are
measuring for the output current to be calibrated correctly.
Step
Press
1
2 SET UP
3 FUNCTION
4 FUNCTION
5 FUNCTION
A field calibration will overwrite the manufacturing values. You cannot restore the factory-set output
calibration.
The output range of the current output used to transmit ranging data to the Indicator is fixed at 4-20 mA
and is not changeable in the field.
9/06 7866 Triple Range Digital H

Table 5-7 Output Calibration Procedure

Connect a milliammeter, with whatever accuracy is required, capable of
measuring 0 to 20 milliamps, to the PV output terminals (16 and 17).
until you see:
Upper Display: CALIBR
Lower Display: CURRENT
You will see ZERO VAL in the Lower Display.
A four-digit value appears in the Upper Display. Use the
the value until the milliampere output, on the meter, is at the desired reading
(4 mA or 0 mA).
Saves the ZERO VAL data.
You will see SPAN VAL in the Lower Display.
A four-digit value appears in the Upper Display. Use the
the value until the milliampere output, on the meter, is at the desired reading
(20 mA).
Saves the SPAN VAL data and terminates the calibration procedure.
and CO Analyzer/Indicator - Operation and Maintenance
2 2
Action
or
or
Calibration
keys to change
keys to change
53