Teledyne 3000ZA-3X - Trace oxygen analyzer User Manual
Page 55

Trace Oxygen Analyzer
Operation
Teledyne
Analytical
Instruments
43
4.7 Range Menu
The RANGE screen is as follows:
-----------------------
Range Select: Auto
Man Rng: R1
R1: 0-1000.00 ppm
R2: 0- 1.00%
R3: 0- 6.00%
-----------------------
4.7.1 Range Select
-----------------------
Range Select: Auto
-----------------------
Pressing ENTER causes the word Auto or Dgtl or Man to start
flashing. Then pressing UP or DOWN cycles through the 3 words.
When Auto is selected, the analyzer will select the range
automatically. The analyzer chooses the least range that will
accommodate the current O
2
concentration. The analyzer will switch to
the next lower range (if available) when the concentration falls below
90% of the lower range setpoint and will switch to the next higher range
(if available) when the concentration exceeds the range's setpoint.
When Man(ual), the analyzer will remain in the range specified in
the 'Man Rng' field.
When Dgtl (Digital), the analyzer will select the range according to
the signals on the remote digital cal contacts on the rear panel (and
therefore disabling their original intent of being used aa remote
calibration initiation inputs).
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