Teledyne GFC-7001E - Trace CO Analyzer - Manual (Page 147)

Advanced Features Model GFC7001E Carbon Dioxide Analyzer
Teledyne Analytical Instruments 147
7.5. SETUP MORE  ALRM: USING THE GAS
CONCENTRATION ALARMS
The GFC 7001E/EM includes two CO concentration alarms if OPT 61 is installed on your instrument. Each
alarm has a user settable limit, and is associated with a Single Pole Double Throw relay output accessible via the
alarm output connector on the instrument’s back panel (See Section 3.3.3). If the CO concentration measured
by the instrument rises above that limit, the alarm‘s status output relay is closed.
The default settings for ALM1 and ALM2 are:
Table 7-11: CO Concentration Alarm Default Settings
ALARM STATUS LIMIT SET POINT 1
alm1 Disabled 100 ppm
alm2 Disabled 300 ppm
1
Set points listed are for PPM. Should the reporting range units of measure be changed (See Section
6.6.3) the analyzer will automatically scale the set points to match the new range unit setting.
NOTE
To prevent the concentration alarms from activating during span calibration operations ensure that the
CAL or CALS button is pressed prior to introducing span gas into the analyzer.
7.5.1. SETTING THE GFC 7001E CONCENTRATION ALARM LIMITS
To enable either of the CO concentration alarms and set the limit points, press: