Teledyne 7500ZA - Infrared Gas Analyzer User Manual

Page 84

Settings and Calibration

Model 7500ZA

Teledyne Analytical Instruments

6.7 Maintenance Mode

This mode is used to check sensor input values,

display of error log or setting of passwords, etc. This is
a password protected area. To access the maintenance
mode, enter the correct password from the Parameter
Setting/To Maintenance screen.

1. Select the Maintenance Mode from the

Parameter Setting screen to display the
Password Setting screen.

2. Enter the password, and the Maintenance Mode

item selection screen will be displayed. Point
the cursor to the item you want to set by
pressing the UP or DOWN key and then press
ENT.

Note: “To Factory Mode” is for TAI’s service

engineers only.

3. Press the ESC key to return to the Maintenance

Mode item selection screen from each screen.

6.7.1 Sensor Input Value screen

There are 5 possible inputs on the Model 7500ZA:

1. Input 1 to 4 : NDIR sensor digital value

2. Input 5 : O2 sensor digital value

6.7.2 Error Log screen

This screen displays the error history and logs the

last 14 instrument errors.

See Section 8.1 Error Message for specific

information regarding error number and its meaning.

To clear an error from the log, select Clear Error

Log and press the ENT key. The specific entry will be
removed from the list.