Teledyne GFC-7001E - Trace CO Analyzer - Manual (Page 103)

Basic Operation Model GFC7001E Carbon Dioxide Analyzer
Teledyne Analytical Instruments 103
6.6.3.3. RNGE  MODE  AUTO: Configuring the GFC 7001E/EM Analyzer for AUTO Range
Mode
In AUTO range mode, the analyzer automatically switches the reporting range between two user-defined ranges
(low and high).
 The unit will switch from low range to high range when the CO
2
concentration exceeds 98% of the low
range span.
 The unit will return from high range back to low range once both the CO
2
concentration falls below 75% of
the low range span.
In AUTO Range Mode the instrument reports the same data in the same range on both the A1 and A2 outputs
and automatically switches both outputs between ranges as described above.
Also the RANGE test function displayed on the front panel will be replaced by two separate functions:
RANGE1: The LOW range setting for all analog outputs.
RANGE2: The HIGH range setting for all analog outputs.
The high/low range status is also reported through the external, digital status bits (See Section 3.3.3).
To set individual ranges press the following keystroke sequence.