Teledyne 3000TA-XLEU - Trace oxygen analyzer - Manual (Page 58)

Operation 3000TA-XL-EU
Teledyne Analytical Instruments 42
The factory default is three minutes, but the delay time is
programmable. To adjust to delay time use the Left or Right arrow keys.
When the time displayed on the second line blinks, it can be adjusted by
Pressing the Up or Down keys to increase or decrease its value. The
minimum delay is 1 minute, the maximum is 30.
This preference is stored in non-volatile memory so that it is
recovered if power is removed from the instrument.
4.3.2 Setting up an Auto-Cal
When proper automatic valving is connected (see Chapter 3,
Installation), the analyzer can cycle itself through a sequence of steps
that automatically calibrates the instrument.
Note: If you require highly accurate Auto-Cal timing, use external
Auto-Cal control where possible. The internal clock in the
Model 3000TA-XL-EU is acurate to 2-3 %. Accordingly,
internally scheduled calibrations can vary 2-3 % per day.
To setup an Auto–Cal cycle:
CAUTION: TAI DOES NOT RECOMMEND FREQUENT ZERO
ADJUSTMENTS OF THE CELL. A NEWLY
INSTALLED CELL MAY TAKE 7-10 DAYS OF
OPERATION TO REACH A STEADY ZERO
(TYPICALLY LESS THAN 0.2 PPM). IF REQUIRED,
THE INSTRUMENT MAY BE ZEROED AFTER THIS
INITIAL STABILIZING PERIOD AND MAY BE
CHECKED AGAIN AFTER A ADDITIONAL 7-10 DAYS.
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 sub functions.
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