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CGA 351 User’s Manual 27
Chapter 4.
Chapter 4.
4.1 Setup and Calibration
4.1.1 Introduction
Although the CGA 351 is set up at the factory with default operational parameter values that are suitable for many
applications, the User Program provides a means for customizing many of the setup parameters. Proper setup of the
analyzer is very important to ensure accurate data readings.
Generally, changes in calibration result from aging of the zirconium oxide oxygen sensor. Within limits, oxygen
reading errors can usually be compensated for by making minor temperature adjustments. The zirconium oxide
oxygen sensor should be calibrated once or twice a week for the first month of operation and every 2–3 months
thereafter.
WARNING!
To ensure safe operation of the CGA 351, it must be installed and operated as described in this
manual.
In addition, be sure to follow all applicable local safety codes and regulations for installing electrical
equipment. In addition, all procedures should be performed by trained service personnel.
Follow the instructions in this chapter exactly to ensure proper setup and calibration of the CGA 351.
4.1.2 Accessing the User Program
To ensure accurate oxygen level readings and to make use of the alarm relays, serial port and analog output, the
appropriate entries must be made in the User Program. Follow the instructions in this section to accomplish these
tasks.
Enter the
User Program by pressing the
[ESC] key. While in the
User Program, press
[ESC] at any time to abort the
current operation.
Note: Some submenus may be locked and will require a special key sequence and a password for entry (see “User
Program Security” on page 16 of Chapter 3, Operation).
As an aid in programming the CGA 351, refer to the menu map, Figure 3-1 on page 25. Proceed directly to the
appropriate section to set up and/or calibrate the analyzer.
4.1.3 The [Cal] Menu
After entering the
User Program, access the
[Cal] submenu to set the following parameters:
• Alarm-1 relays
• Alarm-2 relays
• Alarm-3 relays
• Alarm-4 relays
• temperature controls
The calibration and diagnostic portions of this submenu are discussed later in this chapter. Proceed to the
appropriate section for specific instructions on the topic of interest.
Table 22:
Cfg Cal Opt Disp Use the [

] and [

] keys to
select [Cal] and press
[ENTER] . (NOTE: this screen
shows the [Disp] option as
already being configured.)
POWER ESC ENTER