Calculating The Calibration; Repeating The Calibration - Vega FiberFlex LFXG-H Operating Instructions Manual

Calibration
Procedure 3.7: To calculate the linearizer
1. Select Calibration | Linearizer Data Pt | Recalculate.
2. Click OK to proceed with the linearity calculation. The linearizer table
calculates based on the level values.

5 Calculating the calibration

Procedure 3.8: To calculate the calibration
1. Select Calibration | 2 Point Calibration.
2. Click Calculate Results.
3. Click OK.
4. Click OK.

Repeating the calibration

Typically, the system requires only periodic standardization to compensate
for drifts over time.
However, these events require you to repeat the calibration:
• Measurement of a new process application (contact VEGA for
recommendation)
• Process requires a new measurement span
• Entering a new measurement span setting into the software
• Installing a new radiation source holder
• Moving the gauge to another location
• Changes to the process vessel (example: lining, insulation, or agitator)
• Excessive buildup or erosion of vessel that standardization cannot
compensate for (check standardize gain)
• Standardize gain > 1.2 after a standardization, indicating it made a 20%
adjustment from the last calibration
56 LFXG-H Installation and Operation Guide