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Percent Oxygen Analyzer
4.3.2 Setting up an Auto-Cal
When proper automatic valving is connected (see chapter 3, installa-
tion), the Analyzer can cycle itself through a sequence of steps that automati-
cally zero and span the instrument.
Note: If you require highly accurate Auto-Cal timing, use external
Auto-Cal control where possible. The internal clock in the
Model 3000PA is accurate to 2-3 %. Accordingly, internally
scheduled calibrations can vary 2-3 % per day.
To setup an Auto–Cal cycle:
Choose System from the Function buttons. The VFD will display five
subfunctions.
Contrast Function is DISABLED
(Refer to Section 1.6)
Use < > arrows to blink
Span/Zero set appears.
Press < > arrows to blink
won't be able to set OFF to ON if a zero interval is entered.) A Span
Every ... (or Zero Every ...) screen appears.
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
Zero screen appears, use the < > arrows to blink the
field. Use ∆ ∆ ∆ ∆ ∆ ∇ arrows to set the
these fields
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.
(or
and press Enter again. When the Span/
,
because there is a nonzero span interval defined.
Teledyne Analytical Instruments
, and press Enter . A new screen for
), then press Enter again. (You
(or
/
field to
. You can now turn
Operation 4
/
)
4-5
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