Technical Specifications

ValVue Digital Communications Software Ver. 2.80
584
GE Oil & Gas
Calibration Value- Pressure
The pressure sensor is calibrated at the factory. To recalibrate it in the field:
1. Set the pressure to a low value (less than nine psi).
2. Enter the value in this edit box.
3. Select Set Low Pressure Cal from the menu.
4. Calibrate the upper range of the sensor by setting the pressure to a high value (between
10 and 120 psi).
5. Enter the value in this edit box.
6. Select Set High Pressure Cal from the menu.
Open Stop Adjustment
In some valves the stem travel exceeds the nominal valve travel. The SVI allows you to
compensate for this so that the valve position reads 100% at the nominal travel. To make this
correction:
1. Enter 100 in the Open Stop Adjustment edit box.
2. Select Run Find Stops from the context menu. This calibrates the position with the full
valve travel.
3. Return to the Manual mode and adjust the valve to its nominal travel and note the position
reading.
4. Return to Calibrate mode.
5. Enter the position that was measured at nominal travel into the Open Stop Adjustment edit
box.
6. Select Run Find Stops from the menu. This calibrates the value so that the nominal travel
reads 100%.
Pressure Calibration Procedure
The Calibrate tab allows you to recalibrate the pressure sensor in the SVI. The sensor is
calibrated at the factory and does not usually require recalibration, but if needed, this dialog
provides a convenient method. The Reset to Factory button returns the calibrations to those
that were set before delivery of the SVI.
The currently measured value of the pressure sensor is displayed and can be compared to
reference measurements to see if recalibration is necessary.
The procedure for recalibration is:
Zero Calibration
1. Click the Calib. Pressure button. A dialog appears.
2. Enter 0 in the Pressure Value field.