Honeywell SmartLine, Руководство пользователя

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4. Start up
4.6. Calibrating the transmitter
Revision 2 SmartLine Wireles User's Manual 49
6. Select the Cal Lower command and wait for the calibration status value to change from
NONE to SUCCESS, SUCCESS with EXCESS, or FAILURE. If the status returns
FAILURE stop and check that the value of the lower calibration point is within the range
of the meter body.
7. Apply the upper pressure to the meter body. As with the lower pressure value, when
applying a negative pressure the high side of the meter body will be at a lower pressure
than the low side.
8. Select the Cal Upper command and wait for the calibration status value to change from
NONE to SUCCESS, SUCCESS with EXCESS, or FAILURE. If the status returns
FAILURE stop and check that the value of the upper calibration point is within the range
of the meter body. If the status returns SUCCESS with EXCESS, the calibration was
applied but the adjusted characterization value is outside it’s allowed adjustment range
and the accuracy of the process value over the calibrated range is not guaranteed to be
within the specified tolerance.
Note: When applying pressure, ensure the pressure is stable to get a valid setting. Some pressure
sources can vary in pressure (bounce especially dead weight testers) and this will give false
reading.
Notes on Calibration Status:
SUCCESS: If the calibration status return SUCCESS it is indicating that the transmitter
successfully applied a gain and offset that provides a process value that is within the specified
accuracy over the calibrated range of .075% of the reduce range or ±0.025 + 0.05 20 psi span psi
or ±0.025 + 0.05 (1.4 bar) span bar in % span.
FAILURE: If the calibration status returns FAILURE it is indicating that the transmitter could
not be calibrated either due to the calibration points being beyond the range of the meter body or
the calibration span (difference between the upper and lower calibration points) is too small.
SUCCESSS with EXCESS: If the calibration status returns SUCCESS with EXCESS it is
indicating that the calibration was successful but the applied gain or offset resulting from the
calibration is deviates by more than 5% of the characterized range. This could happen if the
applied calibration pressure for either the upper or lower calibration point deviates from the
selected calibration point in a manner that will cause the adjusted gain or zero correction be
greater than 5% of the URL.