G4SZV-1/G4SZV-2 & G4SDZV-2 V1.10
Page 27
4.3
Gas Flow Measurement
The rotating of the Gray code wheel is converted into volume measured. The volume
measured is corrected by the error curve correction function as described in 4.4. The
corrected cyclic volume is then corrected for temperature as described in chapter 4.5.
and shows as V on the balance display.
4.4
Error Curve Correction
The electronic index is automatically compensating for the error of the meter. This is
determined at calibration.
During calibration at the production stage, 3 or 4 flow rates may be entered together
with the corresponding error. These flow/error values make the “error curve”. Errors at
flow rates that have not been determined at calibration are calculated by linear
interpolation. Below Qmin and above Qmax the corrections from Qmin, resp. Qmax are
used.
Index PCB
Gray coded wheel
fits in this slot
