Teledyne 2120XL, Operating Instructions Manual, Page: 52 / 85

Operation Model 2120XL
Teledyne Analytical Instruments 40

Dig Filt:
The Model 2120XL includes a user adjustable
digital filter. The filter has settings 1-10. Setting 1 is the least
amount of filtering and 10 is the highest level of damping.

Self–Test
: The instrument performs a self-diagnostic test to
check the integrity of the power supply, output boards and
amplifiers.

PSWD:
Security can be established by choosing a 5 digit
password (PSWD) from the standard ASCII character set.
(See Installing or Changing a Password, below, for a table of
ASCII characters available.)

Logout:
Logging out prevents an unauthorized tampering
with analyzer settings.

More
: Select and enter More to get a new screen with
additional sub functions listed.

Auto-Cal
: Used to define an automatic calibration sequence
and/or start an Auto-Cal.

Flow:
Used to set the flow through the flow controller.

TRAK/HLD
: The operator sets whether the instrument
analog outputs track the concentration change during
calibration and sets a time delay for the concentration alarms
after calibration

Cal Hold Timer:
Allows alarm suppression and analog
output value hold times during calibration events for a user
adjustable period.

Model
: Displays Manufacturer, Model, and Software
Version of the instrument.

Out-Cal:
Analog output calibration allows the user to
calibrate the 4 and 20 mA analog output values.

Lin:
Used to linearize the output of the controller.
To enter any of the system functions, use the ◄► arrow keys to
move to the function and then use the ENTER key to engage that
function.
4.5.1.1 D
IGITAL
F
ILTER
Upon entering the digital filter function, the following screen
appears on the display: