M20013 REL-0000 (2103)
User Manual HHP460 Smart Manometer with Altimeter & Air Speed Test
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Customer calibration
You can calibrate the manometer in the field for
1. Zero.
2. Span.
3. Linearity.
The customer calibration does not replace the Factory Lab
Calibration Procedure. It is intended to correct the curve fit if the
actual sensor characteristics change slightly over time.
For sensors up to 200 psi, Omega recommends a ± 0.0015 % of
reading deadweight tester. For sensors 200 psi and above, a ±
0.0030 % of reading deadweight tester is recommended. Note that
AI type sensor requires absolute referenced deadweight testers or
standards for field calibration. The options are:
1. 2-point (within upper 50 % of FS)
2. 5-point (nominal values of 0 %, 25 %, 50 %, 75 % and 100 % of
FS).
3. Restore factory default calibration.
For the 5 Point calibration, points 2, 3 and 4 can be adjusted
within ± 1 % of reading around the nominal values. Point #5 can
be adjusted within -1 % of reading around nominal. Point #1 is
fixed.
The unit can only be calibrated if the calibration points are within
5 times the accuracy of the original factory calibration
For example: at 0.05 % accuracy, the point limit is ± 0.25 % of
FS.
If the calibration procedure generates a new value outside this
limit the procedure fails. In this case the unit would need to be
returned to the factory for service.
After a calibration has been performed (either 2-point or
5-point), the sensor uses only that calibration. To turn on another
calibration type, you must first
Restore Factory Defaults
and then
choose another calibration method.
