6 Calibration
6.1 Overview
During calibration, the operator applies two calibration gases with known O
2
concentrations and one calibration gas with a known COe concentration to the
transmitter. Slope and constant values are calculated to determine if the
transmitter is correctly measuring net concentration of O
2
and combustibles in
the industrial process.
Before calibrating the transmitter, verify that the calibration gas parameters are
correct by setting the test gas values to use when calibrating it. Refer to
Configuration and start-up.
There are three calibration methods available to the transmitter: automatic,
operator-initiated, and manual. You can access calibration commands and menus
with the Field Communicator or the optional local operator interface (LOI).
6.2 Fully automatic calibration
If the transmitter is equipped with calibration solenoids, you can program it to
automatically calibrate without any operator action.
Refer to Set up autocalibration using the local operator interface (LOI) or Set up
autocalibration using HART
®
to set up the transmitter for fully automatic
calibration.
6.2.1
Set up autocalibration using the local operator
interface (LOI)
If necessary, refer to Figure 4-4 for reference. The transmitter must be equipped
with calibration solenoids to use automatic calibration.
Procedure
1. From the operating display, press Right to select SYSTEM from the first
column submenu.
2. From the SYSTEM first column submenu, press Right to select the Calib
Setup second column submenu.
3. From the Calib Setup second column submenu, press Right to select the
third column parameter list.
4. Scroll down to the last item, Use Solenoids. If the transmitter is equipped
with calibration solenoids and you want timed automatic calibration, select
Yes.
5. Press Up to select O2 Out Tracks. Select Yes or No to determine if the
transmitter will update the O
2
lock value.
Manual
Calibration
00809-0500-4880 December 2022
Rosemount OCX8800A 93
To Next Page
Loading...
