Page 56
ST 800 Series HART/DE Option User’s Manual
Revision 5.0
6 DE Calibration
6.1 Overview
The ST800 SmartLine Pressure Transmitter does not require periodic calibration to maintain
accuracy. Typically, calibration of a process-connected Transmitter may degrade, rather than augment
its capability. For this reason, it is recommended that a Transmitter be removed from service before
calibration. Moreover, calibration will be accomplished in a controlled, laboratory-type environment,
using certified precision equipment.
6.2 Calibration Recommendations
If the Transmitter is digitally integrated with a Honeywell Total Plant Solution (TPS) system, you can
initiate range calibration and associated reset functions through displays at the Universal Station,
Global User Station (GUS), and Allen-Bradley Programmable Logic Controllers (PLCs). However, a
range calibration using the MC Toolkit with the Transmitter removed from service is recommended.
Calibration with the Transmitter removed from service needs to be accomplished in a controlled
environment. Details for performing a calibration reset through the Universal Station are provided in
the
PM/APM SmartLine Transmitter Integration Manual
, PM12-410, which is part of the TDC 3000
X
system book set.
6.3 Test Equipment Required for Calibration
Depending upon the type of calibration you choose, you may need any of the following test
equipment to accurately calibrate the transmitter:
•
Digital Voltmeter or millimeter with 0.01% accuracy or better
•
Honeywell MC Toolkit: Use the
MC Toolkit
application to calibrate the ST 800 DE model
and the
FDC
application to calibrate the ST 800 HART model.
•
Calibration-standard input source with a 0.01% accuracy
•
250 ohm resistor with 0.01% tolerance or better.
6.4 Analog Output Signal Calibration
The Transmitter analog output can be calibrated at its zero (0) and100% levels using a constant-
current source mode. The Transmitter does not have to be removed from service for the analog output
signal calibration procedure.
