Teledyne 2020 - Explosion proof thermal conductivity analyzer - Manual (Page 41)

Thermal Conductivity Analyzer Operation 4
4-7 Teledyne Analytical Instruments
Call out MAIN MENU, scroll to AUTO-CAL function, and ENTER.
A new screen for
ZERO/SPAN set appears.
ZERO in Ød Øh off
SPAN in Ød Øh off
Use UP/DOWN Control to blink
ZERO
(or
SPAN
), then Enter . (You
won’t be able to set
OFF to ON if a zero interval is entered.) A Span Every
... (or
Zero Every ...) screen appears.
Zero schedule: OFF
Day: Ød Hour: Øh
Use UP/DOWN Control to set a value in days, then ENTER to move
to the start-time value in hours. Use UP/DOWN to set a start-time value,
then ENTER.
To turn
ON the SPAN and/or ZERO cycles (to activate AUTO–CAL):
useUP/DOWN Control to set the
OFF/ON field to ON. You can now turn
these fields
ON because there is a nonzero span time defined.
4.3.3 Password Protection
Before a unique password is assigned, the system assigns
TAI by
default. This password will be displayed automatically. The operator just
presses the Enter key to be allowed total access to the instrument’s features.
If a password is assigned, then setting the following system parameters
can be done only after the password is entered: alarm setpoints, AUTO-
CAL setup. ZERO/SPAN calibration assigning a new password, range/
application selections, and curve algorithm linearization. (APPLICA-
TION and ALGORITHM are covered in the programming section.) How-
ever, the instrument can still be used for analysis or for initiating a self-test
without entering the password. To defeat security the password must be
changed back to
TAI.
NOTE: If you use password security, it is advisable to keep a copy of
the password in a separate, safe location.
4.3.3.1 Entering the Password
To install a new password or change a previously installed password,
you must key in and ENTER the old password first. If the default password
is in effect, pressing the ENTER button will enter the default
TAI password
for you.
Call out MAIN MENU setup by selecting any controls