Honeywell DR4500A - 7.2 Restoring Factory Calibration

Input Calibration - Restoring Factory Calibration
176 DR4500A Classic Series Circular Chart Recorder With or Without Control Product Manual Release M
April 2017
What’s in this section?
This section contains the following topics:
Topic
See Page
7.1 Overview
175
7.2 Restoring Factory Calibration
176
7.3 Minimum and Maximum Range Values
178
7.4 Preliminary Information
180
7.5 Calibration Set Up and Wiring for PV Inputs
182
7.6 Calibration Procedure
191
7.2 Restoring Factory Calibration
How to restore it
The factory calibration constants for all the input actuation types that can be used with the DR4500A
recorder are stored in its nonvolatile memory. Thus, you can quickly restore the “Factory Calibration” for a
given input actuation type by simply configuring the actuation type through the IN1 TYPE (or IN2 TYPE)
prompt to another type and then changing it back to the original type. See Table 7-1 for the procedure.
ATTENTION
This procedure applies only for factory-installed inputs. Any input that was field-installed must
be field calibrated.
Procedure
Table 7-1 lists the procedure for restoring factory calibration.
Table 7-1 Restoring factory calibration
Step
Operation
Press
Action/Result
1
Enter Input Setup Group
SET
UP
Until you see:
Upper Display: SET UP
Lower Display: INPUT n n = 1 or 2
2
Change input type
FUNC
Until you see:
Upper Display: Note the input type in the upper
display. Make sure that the
selection matches the type of
sensor that is connected to the
input in your application. Write it
down, if necessary.
Lower Display: INn TYPE n = 1 or 2