10- Calibration; Introduction; Overview - Honeywell ST 3000 User Manual

Introduction

About this section
This section provides information about calibrating the transmitter's analog output and measurement range.
It also covers the procedure for resetting calibration to default values as a quick alternative to measurement
range calibration.
This section includes these topics.
How to calibrate the transmitter's analog output circuit using the communicator
How to perform a two-point calibration of the transmitter
How to perform a corrects reset to return the transmitter calibration to its default values.

Overview

About calibration
The ST 3000 Smart Transmitter does not require recalibration at periodic intervals to maintain accuracy. If
a recalibration 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.
Before you recalibrate the transmitter's measurement range, you must calibrate the transmitter's analog
output signal. See Table 44 for procedure.
You can also use the communicator to reset the calibration data to default values, if they are corrupted,
until the transmitter can be recalibrated. See Table 46 in this section for details.
ATTENTION
All procedures in this manual assume a transmitter poll address of 0 (zero). See Section 6, for
information about poll address.
Equipment Required
ATTENTION
Depending upon the calibration you choose, you may need any of the following test equipment
to accurately calibrate the transmitter:
• Digital voltmeter or milliammeter with 0.02% accuracy or better
• HART hand-held communicator
• Calibration-standard pressure source with a 0.02% accuracy
• 250 ohm resistor with 0.01% accuracy or better.
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10— Calibration
ST 3000 HART Transmitter Release 300 User Manual
10— Calibration - Introduction
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