MC Toolkit Software with Honeywell HART Transmitters
Release 3
34-ST-25-20 MC Toolkit User Manual
51
9/06
Table 12 Honeywell HART Calibration - Zero Trim
Honeywell HART Calibration Zero Trim
Overview
of
Objectives
(Applies to
ST 3000)
Requirements:
•
Input source, with accuracy of at
least 0.04%
•
resistor, at least 250-ohms
•
Voltmeter or Ammeter
•
24 Vdc Power Supply (nominal)
•
Clean work area with suitable
environmental conditions.
•
Pressure Transmitter must be level.
Overview of Procedures:
The Zero-Correct procedure establishes
the correct
vertical positioning
of the
response profile.
The LRV Correct and URV Correct
procedures establish the correct
slope
of
the response profile by rotating the
response profile around the zero-
reference point as a pivot.
The Zero-Correct procedure can be done
at any time during the Correct LRV and
Correct URV procedures in the same
calibration session.
The Correct LRV and Correct URV
procedure should never be performed
without first performing the Correct
Input (Zero) procedure in the same
calibration session.
The transmitter should be removed from
service and moved to a clean area.
The input source should be derived from
a precision input source such as a dead-
weight tester.
Objective(s):
Using a precision PV input source as a reference,
command the transmitter to write calibration
coefficients to NVM associated with transmitter
input hardware and software.
•
Correct Input (Zero)
•
Correct LRV
•
Correct URV
