Chapter 9.
154
TransPort™ PT878GC User’s Manual
9.1.7
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
[ENTER]
. The screen appears similar to Figure 142 below.
Figure 142: The Outputs Window
in the Calibration Option
9.1.7.1
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 span point (20 mA). You enter, first the setpoint, and then the actual value measured with a digital ammeter
or voltmeter. The analog outputs have a resolution of ±5.0 µA. Press the [
] arrow key to enter the Analog Output
window.
1.
Connect a digital multimeter or ammeter to the analog output.
2.
The next prompt asks for the setpoint (4 or 20 mA). Use the [
] and [
] arrow keys to move to the appropriate
radio button and press
[ENTER]
.
3.
The next prompt asks you to enter the actual value shown on the multimeter or ammeter.
a.
Press
[ENTER]
to open the text box.
b.
Use the numeric keys to enter the measured value.
c.
Press
[ENTER]
to confirm your entry.
4.
Repeat steps 2 and 3 for the other setpoint.
5.
Press the [
] arrow key to move to the Calibrate box, and then press
[ENTER]
to calibrate the output.
If you are unsatisfied with the calibration, you can reset the inputs to factory defaults. Press the [
] arrow key to
move to the Reset box, and then press
[ENTER]
to undo the calibration.
You have completed calibrating the outputs. To leave the Output window,
•
Press the [
] key to return to the Output tab, and the [
] arrow key to move to the Input tab.
•
Press
[F2]
(Cancel) to return to Operate Mode without confirming the changes.
•
Press
[F3]
(OK) to confirm the new data. The PT878GC returns to Operate Mode.
Analog Output
Calibrate/Test I/O
Analog Input
Setpoint
Cancel
OK
mA
4
Calibrate
Actual 4
4 mA
20 mA
Actual 20 mA
Reset
20
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Страница 199: ...Appendix A TransPort PT878GC User s Manual 189 Figure 163 The Site Menu...
Страница 200: ...Appendix A TransPort PT878GC User s Manual 190 Figure 164 The Program Menu Transducer Lining Fluid and Path Options...
Страница 201: ...Appendix A TransPort PT878GC User s Manual 191 Figure 165 The Program Menu Pipe Option...
Страница 204: ...Appendix A TransPort PT878GC User s Manual 194 Figure 168 The Meter Menu...
Страница 205: ...Appendix A TransPort PT878GC User s Manual 195 Figure 1 Logging Mneu...
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