Teledyne 3000 Ultra Trace - PPB oxygen analyzer - Manual (Page 40)

4 Operation Model Ultra Trace 3000
4-6 Teledyne Analytical Instruments
after this initial stabilizing period and may be checked again after a addi-
tional 7-10 day frequency of zero adjustment is at the discretion of the user
(once a month is suggested).
Choose System from the Function buttons. The LCD will display five
subfunctions.
TRAK/HLD Auto—Cal
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Use < > arrows to blink Auto—Cal , and press Enter . A new screen for
Span/Zero set appears.
Span OFF Nxt: 0d 0h
Zero OFF Nxt: 0d 0h
Press < > arrows to blink Span (or Zero ), then press Enter again.
(You won’t be able to set
OFF to ON if a zero interval is entered.) A Span
Every ... (or Zero Every ...) screen appears.
Span Every 0 d
Start 0 h from now
Use
∆∆∆∆∆∇
arrows to set an interval value, then use < > arrows to move to
the start-time value. Use
∆∆∆∆∆∇
arrows to set a start-time value.
To turn
ON the Span and/or Zero cycles (to activate Auto-Cal): Press
System again, choose Auto—Cal , and press Enter again. When the
Span/
Zero values screen appears, use the < > arrows to blink the Span (or Zero)
OFF
/
ON field. Use
∆∆∆∆∆∇
arrows to set the OFF
/
ON field to ON . You can now
turn these fields ON because there is a nonzero span interval defined.
4.3.3 Password Protection
If a password is assigned, then setting the following system parameters
can be done only after the password is entered: span and zero settings,
alarm setpoints, analysis range definitions, switching between autoranging
and manual override, setting up an auto-cal, and assigning a new password.
However, the instrument can still be used for analysis or for initiating a self-
test without entering the password.
If you have decided not to employ password security, use the default
password
TETAI. This password will be displayed automatically by the
microprocessor. The operator just presses the Enter key to be allowed total
access to the instrument’s features.
NOTE: If you use password security, it is advisable to keep a copy of the
password in a separate, safe location.