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Trace Oxygen Analyzer Operation
Teledyne Analytical Instruments 39
4.5 Zero Menu
The ZERO screen is as follows:
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Zero 0.00 ppm
Zero Timer: 7 min.
Zero Auto Finish
Zero Begin
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4.5.1 Zero Finish
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->Zero AUTO Finish
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Pressing ENTER causes the AUTO or MANUAL after 'Zero' to start
flashing. Pressing UP or DOWN toggles the value. The value
determines the method by which the zero settling period is complete and
a zero calculation is automatically performed. If the value is MANUAL,
then when the zero begins, the user is prompted to press ENTER at the
time he/she determines the sensor has settled on the zero sample. If the
value is AUTO, the analyzer automatically countdowns the time when
the sensor has settled on the zero sample, and will proceed to calculate
the new zero offset, and return to ANALYZE MODE. The timer is now
fixed to 7 minutes. Note that the user may press ENTER to complete the
span even though the value is AUTO.
4.5.2 Zero Value
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->Zero 0.00 ppm
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Pressing ENTER causes the number after 'Zero' to start flashing.
The number has a range of 0 ppm to 100 ppm and should be set equal to