Teledyne 3000TB, Operating Instructions Manual

Page: 76 / 107

Trace Oxygen Analyzer Operation
Teledyne Analytical Instruments 61
The default threshold is set to 300 but can be increased or
decreased by the user using this function. The sensor fail function can
also be turned OFF or ON within this function.
To access the Sensor function, use the◄ / ► arrow keys to
navigate to the last
System
menu.
Sensor
Press
Enter
. The next screen will appear:
Sensor FAIL: ON
Thresh: 200 Reset
In this screen the featured can be turned on and off on the first line.
The Sensor Detection feature is ON by default. To turn the alarm ON or
OFF, use the ◄ / ► arrow keys to move the blinking to
ON
(or
OFF
).
Press the ▲/▼ keys to toggle between ON and OFF . Press Enter to save
your choice.
The detection window (
Thresh
) around the electronic zero level is
set on the second line. It defaults to 300 but it can be adjusted. This
numbers is the ADC counts on the A to D converter and it is equivalent
to 0.114% of the full scale of the A to D converter.
Adjust the threshold for the alarm by moving the blinking over to
the value adjacent to Thres: . Use the ▲/▼ keys to increase or decrease
the threshold value. When the desired value is displayed, press Enter to
save it.
The fixed 30 minute timer begins to count down to zero whenever
the ADC sensor count falls below the set threshold. If within the
countdown, the user sets a new and higher threshold or replaces the
sensor to remedy the near zero output, the countdown timer can be reset
back to 30 minutes manually using the Reset feature.
To reset the counter to 30, use the arrow keys to move the blinking
to
Reset
and then press the Enter key.
The timer and the ADC counts can be displayed on the
Analyze
screen by pressing the ESC key twice.