Calibrating The Analog Output And Inputs; Calibrating The Analog Output - GE TransPort PT878 User Manual

Chapter 8. Servicing the PT878

8.7 Calibrating the Analog Output and Inputs

The Calibration option allows you to calibrate the analog output and inputs.
To enter the option, scroll to the Calibrate entry on the Service Menu and
press . The screen appears similar to Figure 117 below.
[ENTER]
Analog Output
Setpoint
Actual 4
Calibrate
Figure 117: Outputs Window in the Calibration Option

8.7.1 Calibrating the Analog Output

The calibration procedure consists of calibrating the analog output zero
point (0 or 4 mA) and then calibrating the full scale point (20 mA). You
enter, first the setpoint, and then the actual value derived from an ammeter
or digital voltmeter. The analog outputs have a resolution of ±5.0 µA. Press
the [ ] arrow key to enter the Analog Output window.
174
Calibrate/Test I/O
Analog Input
20 mA
4 mA
mA
4
Transport® Model PT878 Portable Liquid Flowmeter User's Manual
Actual 20 mA
Reset
Cancel
20
OK