Teledyne 2120XL, Operating Instructions Manual, Page: 53 / 85

Trace Nitrogen in Argon Analyzer Operation
Teledyne Analytical Instruments 41
Weight of Digital
Filter: 4
The current filter setting (4 in this case) will be flashing. It can be
modified from 0 (no filtering) to 10 maximum filtering using the ▲ / ▼
keys. Pressing ENTER will accept the value and return to the
SYSTEM
menu.
The default setting should suffice for most applications. In some
applications where speeding the response time with some trade off in
noise is of value, the operator could decrease the number of the digital
filter. In applications where the signal is noisy, switch to a higher
number, however, the response time will decrease.
4.5.1.2 S
ELF
-T
EST
The system self-test is automatically initiated when the unit is
powered up. It can also be activated by the user from the
SYSTEM
menu.
To manually initiate a self-test, press the STSTEM key and navigate to
Self-Test using the
◄► arrow keys. Press ENTER to engage the
function and the following screen appears:
Perform System Test?
<ENT> Yes <ESC> No
Pressing ENTER will begin the Self-Test. A successions of
diagnostic screens will follow:
RUNNING DIAGNOSTIC
Testing Preamp — 83
During preamp testing there is a countdown in the lower right
corner of the screen. When the testing is complete, the results are
displayed.
Power: ## Analog: ##
Preamp: ##
The module is functioning properly if it is followed by
OK
. If a
problem is detected, a number will appear next to the heading and