Copyright 2010 Baker Hughes Company.
English–PACE Calibration Manual | 15
12. Do a calibration check to make sure this procedure worked. Refer to Section 6.
13. After completing the calibration procedures, adjust the pressure calibration standard to
atmospheric pressure. Disconnect the pressure calibration standard from the PACE.
14. If no further calibration is necessary, de-energize the PACE.
11. Calibration Adjustment B2 - PACE Indicators
Note: Zeroing the Reference Sensor is not necessary for calibration adjustment as this is reset
automatically during the adjustment process.
1. Do a calibration check (see “Calibration Check B - PACE Indicators” on page 13) on the
Barometer first. If the recorded difference is more than the permitted deviation then the
Barometer must be adjusted (see “Calibration Adjustment B1 - PACE Indicators” on
page 14).
2. Do the steps in “Calibration Adjustment B1 - PACE Indicators” on page 14.
12. PACE Tallis Linearity Adjustment
1. Connect the PACE Tallis to the pressure calibration standard. Refer to Section 5.
2. Select the measured pressure, then Global Setup > Calibration and enter the Calibration
PIN (4321).
3. Select Sensor Correction.
4. Select the pressure sensor to be corrected.
5. Select Linearization.
6. Adjust the applied calibration pressure to the first pressure value and wait until this pressure,
shown on the PACE, is stable (aim for 1 ppm (0.0001%)). The standard deviation of the
measured pressure is shown on the screen (σ) in the pressure units to aid with measuring
the deviation in pressure.
Note: The display also shows throughout this procedure the message ‘Calibrating’ and the
selected pressure range.
7. Use the on-screen keypad to enter the applied pressure, then select the value on the display
to save it.
8. The display will now show ‘Keep calibration point?’. Select the pressure shown to keep the
calibration used or select the undo icon to re-enter the applied pressure.
9. Repeat steps (7) to (9) for the next value.
10. Select Repeat to re-apply the same pressure and Quit Calibration to exit the calibration of
this pressure range.
11. Do a calibration check to make sure this procedure has worked. Refer to Section 6.
INFORMATION This adjustment is for PACE1000 IRS3 and PACE Tallis
TRS3 at 8 bar absolute and above.
INFORMATION The linearity of the Tallis sensors does not usually need
adjusting. This adjustment allows the linearity to be improved to an individual
pressure standard within the range of -127 to +127 ppm of the sensor full scale.
11 adjustment points are available, which can be applied at any pressure over
the range of the sensor and do not have to be equally-spaced. Pressure points
must be applied in ascending order. We recommend that there is 1 point at the
lowest and highest. Linearity correction is interpolated linearly between points.
We recommend a minimum of 5 points. 11 points give optimal performance.
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