Teledyne 3000ZA2G - Zirconium oxide analyzer - Manual (Page 44)

Operation 3000ZA2G
Teledyne Analytical Instruments 32
will be a three-minute delay before the analog outputs and the range ID
contacts start tracking again.
The concentration alarms freeze on their last state before entering
calibration regardless of selecting HOLD or TRACK. But, when HOLD
is selected the concentration alarms will remain frozen for the time
displayed in the second line of the TRAK/HLD menu after the analyzer
returns to the Analyze mode.
The factory default is three minutes, but the delay time is program-
mable. To adjust to delay time use the ◄► arrow keys. When the time
displayed on the second line blinks, it can be adjusted by pressing the
▲/▼ 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 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 3000ZA2G 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 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