Teledyne GFC-7001E - Trace CO Analyzer - Manual (Page 99)

Basic Operation Model GFC7001E Carbon Dioxide Analyzer
Teledyne Analytical Instruments 99
6.6.3. REPORTING RANGE MODES
The GFC 7001E/EM provides three analog output range modes to choose from.
 Single range (SNGL) mode sets a single maximum range for the analog output. If single range is selected
both outputs are slaved together and will represent the same measurement span (e.g. 0-50 ppm),
however their electronic signal levels may be configured for different ranges (e.g. 0-10 VDC vs. 0-.1
VDC).
 Dual range (DUAL) allows the A1 and A2 outputs to be configured with different measurement spans as
well as separate electronic signal levels.
 Auto range (AUTO) mode gives the analyzer to ability to output data via a low range and high range.
When this mode is selected the analyzer will automatically switch between the two ranges dynamically as
the concentration value fluctuates.
Range status is also output via the external digital I/O status outputs (See Section 3.3.3).
To select the Analog Output Range Type press:
NOTE
Upper span limit setting for the individual range modes are shared. Resetting the span limit in one mode
also resets the span limit for the corresponding range in the other modes as follows:
SNGL DUAL AUTO
Range
 Range1  Low Range
Range2  High Range