Calibrating Slot 0 Analog Outputs - GE DigitalFlo XGM868i Service Manual

Panametrics general-purpose gas flow transmitter (1 & 2 channel)

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B.3 Calibrating Slot 0 Analog Outputs

Every Model XGM868i flowmeter includes two built-in analog outputs (A and B) at terminal block

designated as

. Both the zero-point and full-scale values for each output must be calibrated. After calibrating the

Slot 0

outputs, which have a resolution of 5.0 A (0.03% full scale), their linearity should be tested.

Note: The zero point of the analog output may be set for either 0 mA or 4 mA. However, the calibration procedure

always uses the 4 mA point, as the meter will extrapolate this value to obtain the 0 mA point.

Prepare for calibration by inserting an ammeter in series with the load on analog output A at terminal block J1, as

shown in Figure 11.

1. From the Calibration/Test menu (see Figure 10 on page 42), double-click on the Calibration entry to open the

option.

2. In the center pane, double-click on Slot 0.

Note: The

option only appears in the center pane if an option card has been installed in this slot.

Slot 1

DigitalFlow™ XGM868i Service Manual

Terminal Block J1 (Slot 0)

B–

B+

SIG

RTN

Figure 11: Ammeter Connection (Output A)

Appendix B. Calibration and Testing with PanaView

A–

A+

RTN

SIG

Load

Ammeter

, which is

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