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24
The calibration routine requires a minimum of two pressures within the
operating extremes (maximum of six pressures). The instrument
software calculates an offset and gain correction to be applied to all
subsequent readings using a statistical best straight line method.
For single point calibration, the gain factor is set to unity.
1
For the pressure sensor to rapidly respond to the applied pressure,
disable the filter by sending the filter command F, 0,0.
2
Before sending the 'C' command set the instrument to operate in the
pressure measurement units required for calibration. i.e. U, 0
selects mbar. Always use the same units when entering applied
pressures.
Command:
Reply:
Reply:
Reply:
Reply (if N):
Reply
(if N): CALIBRATION TERMINATED
Reply (if Y):
Reply:
K177 Issue No. 3
Notes
C, PIN
APPLY PRESSURE nn
apply pressure, when steady send
ENTER APPLIED PRESSURE nn
type pressure value - decimal number followed by
MORE? (Y/N)
type Y to calibrate more points
or
type N to complete calibration point entry
SLOPE XX INTERSECT YY
ACCEPT CALIBRATION (Y/N)
type Y
to accept and permanently update the calibration
or
type N to terminate without saving
end of calibration procedure
ENTER CAL DATE
type date in the format DD/MM/YY
CALIBRATION COMPLETE
Where:nn = pressure point 1-6
RPT 301 User Manual
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