Teledyne GFC-7000T - Trace CO2 Analyzer - addendum - Manual (Page 13)

Model GFC7000T Carbon Dioxide Analyzer
Teledyne Analytical Instruments 7
6. RELAY ALARM OUTPUTS (AIR PRODUCTS
CONFIGURATION)
There are 4 relay alarm outputs (AL1-AL4) on the rear panel.
 AL1 is for “system okay”,
 AL2 is for “high range status” and
 AL3 is for “zero calibration status”
 AL4 is not used
The AL1 relay is energized when the system is okay and de-energized when the system has
a fault. The AL2 relay is energized when the high auto-range is in use and and AL3 relays
energize when the the instrument is in zero calibration mode.
7. CONTROL INPUTS (AIR PRODUCTS
CONFIGURATION ONLY)
An additional control input is available on this instrument. Control input “C” is used to
select the range for remote calibration. When input C is low, the instrument selects high
range during contact closure calibration.