beautypg.com

Teledyne 7300a - NDIR analyzer User Manual

Page 45

background image

Infrared Gas Analyzer

Operation 4

4-9

Teledyne Analytical Instruments

When you have finished typing the new password, press

Enter

. A verifica-

tion screen appears. The screen will prompt you to retype your password for
verification.

Enter PWD To Verify:

A A A

Use the UP/DOWN key to retype your password and use ENTER to

scroll through the letters, and last enter will complete verification. Your password
will be stored in the microprocessor and the system will immediately switch to
the Analyze screen, and you now have access to all instrument functions.

If all alarms are defeated, the

Analyze

screen appears as:

1.95 % CO2

nR1: Ш — 1Ш Anlz

If an alarm is tripped, the second line will change to show which alarm it is:

1.95 % CO2

AL—1

NOTE:If you log off the system using the LOGOUT function in the

MAIN MENU, you will now be required to reenter the password
to gain access to Alarm, and Range functions.

4.3.4 Logging Out

The

LOGOUT function provides a convenient means of leaving the analyzer

in a password protected mode without having to shut the instrument off. By
entering

LOGOUT, you effectively log off the instrument leaving the system

protected against use until the password is reentered. To log out, scroll to field of
LOGOUT function, and ENTER to logout The screen will display the message:

Protected until

password entered

4.3.5 System Self-Diagnostic Test

The Model 7300A has a built-in self-diagnostic testing routine. Prepro-

gramming signals are sent through the power supply, output board, preamp
board and sensor circuit. The return signal is analyzed, and at the end of the test
the status of each function is displayed on the screen, either as

OK or as a

number between 1 and 1024. (See System Self Diagnostic Test in chapter 5
for number code.) If any of the functions fails, the System Alarm is tripped.

Note: The sensor will always show failed unless identical gas is

present in both channels at the time of the

SELF-TEST

.