Honeywell SMV 3000 user manual Overview, About Calibration

10.2Overview

About Calibration

Differential pressure and static pressure measurements can be affected by conditions external to the transmitter, (such as process material or residue adhering to barrier diaphragms for example), so measurement “drift” cannot be eliminated completely. If recalibration of the differential pressure PV1 and/or static pressure PV2 measurement range is required, we recommend that you do a bench calibration with the transmitter removed from the process and located in a controlled environment to get the best accuracy.

For a transmitter with a small differential pressure span, a input zero correct function should be performed. This action corrects for any minor error that may occur after the transmitter is mounted and connected to the process.

If the transmitter will be operating in the analog mode, you must calibrate its output signal before you calibrate the transmitter’s measurement ranges. While it is not required to calibrate the output signal first for transmitter's operating in the DE mode, you can do it by reading the output in percent.

You can reset the calibration data for any given measurement range to default values, if it is corrupted, until the transmitter can be recalibrated. See subsection 10.5 for details.

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