Teledyne 3000ZA - Trace oxygen analyzer - Manual (Page 43)

Trace Oxygen Analyzer Operation
Teledyne Analytical Instruments 31
4.3 The System Function
The sub fuctions of the System function are described below.
Specific procedures for their use follow the descriptions:
•
Auto-Cal: Used to define an automatic calibration sequence
and/or start an Auto-Cal.
•
PSWD: Security can be established by choosing a 5 digit
password (PSWD) from the standard ASCII character set. (See
Installing or Changing the Password, below, for a table of ASCII
characters available.) Once a unique password is assigned and
activated, the operator MUST enter the UNIQUE password to
gain access to set-up functions which alter the instrument's
operation, such as setting the instrument span or zero setting,
adjusting the alarm setpoints, or defining analysis ranges.
•
After a password is assigned, the operator must log out to
activate it. Until then, anyone can continue to operate the
instrument without entering the new password.
•
Only one password can be defined. Before a unique
password is assigned, the system assigns TETAI by
default. This allows access to anyone. After a unique
password is assigned, to defeat the security, the password
must be changed back to TETAI.
•
Logout: Logging out prevents unauthorized tampering with
analyzer settings.
•
More: Select and enter More to get a new screen with
additional sub functions listed.
•
Self–Test: The instrument performs a self-diagnostic test to
check the integrity of the power supply, output boards and
amplifiers.
•
Version: Displays Manufacturer, Model, and Software
Version of instrument.
•
Show Negative: The operator selects whether display can
show negative oxygen readings or not.
•
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