General Procedures
Release 3
34-ST-25-20 MC Toolkit User Manual
25
9/06
Table 4 Input Calibration (DE Transmitters) - Correct Input (Zero), LRV, URV; Reset
Corrects
Input Calibration (De Transmitters) - Correct Input (Zero), LRV, URV; Reset Corrects
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 in the process operating
range 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.
Objective(s):
Using a precision PV input source as a reference, command
the transmitter to write calibration coefficients to Non-
Volatile Memory associated with transmitter input
hardware and software.
•
Correct Input (Zero)
•
Correct LRV
•
Correct URV
