Setra System SRPM - Manual (Page 20)

20
4.9 CALIBRATION SCREEN
CALIBRATION
To re-zero the device, disconnect the electropneumatic Header H1 so
that room pressures are not applied to the pressure sensor and lightly
press (or tap) the “Zero” button. If a suffi ciently accurate Pressure
Calibrator is available, apply a steady full-scale pressure signal to the
“+” on the header fi tting and press (or tap) the “Span” button. Reconnect
the room pressure tube and calibration is complete. Calibration must
be within ±5% of original calibration for this to occur otherwise an error
message will occur.
The original factory pressure calibration can be restored, if desired, by
pushing the “Restore Factory Setting” button.