Thermal Conductivity Analyzer
Operation 4
4-9
Teledyne Analytical Instruments
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, press the
System
button to enter the
System
function.
CONTRAST AUTOCAL
PWD LOGOUT MORE
Use the
< >
arrow keys to position the blinking over the
LOGOUT
function, and press
Enter
to Log out. The screen will display the message:
Protected until
password entered
4.3.5 System Self-Diagnostic Test
The Model 2000 has a built-in self-diagnostic testing routine. Pre-pro-
grammed 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
.
The self diagnostics are run automatically by the analyzer whenever the
instrument is turned on, but the test can also be run by the operator at will. To
initiate a self diagnostic test during operation:
Press the
System
button to start the
System
function.
CONTRAST AUTOCAL
PWD LOGOUT MORE
Use the < > arrow keys to blink
MORE
, then press
Enter
.
MODEL APPLICATION
SELFTEST ALGORITHM
Use the < > arrow keys again to move the blinking to the
SELFTEST
and press Enter. The screen will follow the running of the diagnostic.
RUNNING DIAGNOSTIC
Testing Preamp Cell
When the testing is complete, the results are displayed.
Contrast Function is
DISABLED
Contrast Function is
DISABLED
(Refer to Section 1.6)
(Refer to Section 1.6)