Aalborg Vortex Insertion - Manual (Page 70)

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If during these two seconds user will press Enter button again, the Data Log index
and overflow counter will be reset to zero.
6. ANALOG CIRCUITRY CALIBRATION
6.1 Analog 4-20 mA output Circuitry calibration
The Vortex 4-20 mA analog output calibration involves calculation and storing of
the offset and span variables in the EEPROM for both output channels. The fol-
lowing is a list of the EEPROM variables used for analog outputs computation:
Analog Output#1 variables:
Index Name Description
32 Out1_Scale_mA - Analog 4-20 mA Output #1 Scale
33 Out1_Offset_mA - Analog 4-20 mA Output #1 Offset
Analog Output#2 variables:
Index Name Description
34 Out2_Scale_mA - Analog 4-20 mA Output #2 Scale
35 Out2_Offset_mA - Analog 4-20 mA Output #2 Offset
NOTE: The PV data recorded in to the Data Log are only accessible
via digital communication interface. Use ASCII Interface Command Set
(see APPENDIX B) or Aalborg supplied Communication Utility to
retrieve (read) PV data from the meter.
,
NOTE: The 4-20 mA analog outputs available on the Vortex Flow Meter
were calibrated at the factory. There is no need to perform analog out
put calibration unless the CPU or TERM PCB was replaced. Any
alteration of the analog output scaling variables in the EEPROM table
will VOID calibration warranty supplied with instrument.
,
NOTE: 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.
,