Owner's manual

6.2 Temperature and Pressure Sensors Calibration*

7. START UP

7.1 Cautions Prior to Start Up

In general, it is good practice to purge the line slowly to prevent unnecessary

damage to the meter.

Once the pipeline is pressurized, check the flow meter and flanges for leaks.

The temperature and pressure transducers should also be checked for leaks.

The meter may give erratic outputs during purging the line if the power has been

turned on before purging the line.

The Vortex flow meter does not have the capability of measuring two phase flow.

In liquid applications, the line should be totally purged of air before powering the

flow meter.

During start up, remember that the meter will not read accurately until the flow

rate meets or exceeds the minimum flow rates stated on the I.D. sheet. The

maximum and minimum flow rates for a specific flow meter can be found on the

meter I.D. sheet.

NOTE: If recalibration of the Temperature or Pressure sensors is

required, it is recommended to use the Aalborg

supplied calibration

and maintenance software for analog output calibration. This software

includes an automated calibration procedure which may radically

simplify calculation of the offsets and spans variables and, the reading

and writing for the EEPROM table.

NOTE: If your flow meter is equipped with optional Temperature and

Pressure sensors, then they were calibrated at the factory. There is no

need to perform Temperature and Pressure sensors calibration unless

the CPU / TERM PCB or actual Temperature or Pressure sensor was

replaced. Any alteration of the temperature or pressure input scaling

variables in the EEPROM table will VOID calibration warranty supplied

with instrument.