Teledyne GFC-7000T - Trace CO2 Analyzer - manual - Manual (Page 79)

FAQ Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 61
5.7. Special Features
5.7.1. Dilution Ratio Option
The Dilution Ration Option is a software option that is designed for applications where the Sample gas is
diluted before being analyzed by the Model GFC 7000TA. Typically this occurs in Continuous Emission
Monitoring (CEM) applications where the quality of gas in a smoke stack is being tested and the sampling
method used to remove the gas from the stack dilutes the gas.
Once the degree of dilution is known, this feature allows the user to add an appropriate scaling factor to
the analyzer’s CO
2
concentration calculation so that the Measurement Range and concentration values
displayed on the instrument’s Front Panel Display and reported via the Analog and Serial Outputs reflect
the undiluted values.
Instructions for using the dilution ratio option can be found in Section 6.8.7.
5.7.2. Maintenance Mode Switch
TAI’s instruments can be equipped with a switch that places the instrument in maintenance mode. When
present, the switch accessed by opening the hinged front panel and is located on the rearward facing side
of the display/touchscreen driver PCA; on the left side; near the particulate filter.
When in maintenance mode the instrument ignores all commands received via the com ports that alter
the operation state of the instrument. This includes all calibration commands, diagnostic menu commands
and the reset instrument command. The instrument continues to measure concentration and send data
when requested.
This option is of particular use for instruments connected to multidrop or Hessen protocol networks.
5.7.3. Second Language Switch
TAI’s instruments can be equipped with switch that activates an alternate set of display message in a
language other than the instruments default language. When present, the switch accessed by opening
the hinged front panel and is located on the rearward facing side of the display/touchscreen driver PCA;
on the right side.
To activate this feature, the instrument must also have a specially programmed Disk on Chip containing
the second language.