Teledyne 3020M - Explosion proof paramagnetic oxygen analyzer User Manual
Page 41
Percent Paramagnetic Oxygen Analyzer
Operation 4
4-5
Teledyne Analytical Instruments
4.3
The AUTO-CAL Function
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 timing of your AUTO-CAL, use
external AUTO-CAL control where possible. The internal clock
in the Model 3020M is accurate to 2-3 %. Accordingly, inter-
nally scheduled calibrations can vary 2-3 % per day.
To setup an
AUTO-CAL
cycle:
Scroll to
AUTO-CAL
, and ENTER. A new screen for
Span/Zero
set
appears.
Span OFF Nxt: 0d 0h
Zero OFF Nxt: 0d 0h
If
SPAN
(or
ZERO
) is not flashing, scroll with DOWN/UP control to
SPAN
(or
ZERO
), 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 ap-
pears.
Span Every 0 d
Start 0 h from now
Use DOWN/UP control to set an interval value, and ENTER. Then use
DOWN/UP to set a start-time value, and ENTER.
Span OFF Nxt: 0d 0h
Zero OFF Nxt: 0d 0h
When the
Span/Zero
values screen appears, use the scroll DOWN to
blink the
OFF/ON
field
of the SPAN
(or
ZERO
) function. Use DOWN/UP
to set the
OFF/ON
field to
ON
. You can now turn these fields
ON
because
there is a nonzero span interval defined.
4.4
The PWD (Password) Function
Security can be established by choosing a 5 digit password from the
standard ASCII character set. If you decide NOT to employ password
security, use the default password
TETAI
. This password will be displayed
automatically by the microprocessor. The operator just ENTERs it to be
allowed total access to the instrument’s features.
Once a unique password is assigned and activated, the operator MUST
enter the UNIQUE password to gain access to any of the set-up functions
(except to enter the password). However, the instrument will continue to