Teledyne GFC-7000E - Trace CO2 Analyzer - Manual (Page 32)

Model GFC7000E Instruction Manual Getting Started
04584 Rev A1 21
Some applications may require multipoint calibration checks where span gas of several different
concentrations is needed. We recommend using high-concentration, certified, calibration gas
supplied to the analyzer through a Gas Dilution Calibrator such as a Teledyne Instruments Model
700. This type of calibrator precisely mixes Span Gas and Zero Air to produce any concentration
level between 0 ppm and the concentration of the calibrated gas.
Figure 3-8 depicts the pneumatic set up in this sort of application of a Model GFC7000E CO
2
Analyzer with zero/span/shutoff valve option 50 installed (a common configuration for this type of
application).
VENT if input is pressurized
VENT
VENT
MODEL 700
Gas Dilution
Calibrator
Indicating
soda-lime
MODEL 701
Zero Air Generator
Calibrated
CO
2
Gas
Source of
SAMPLE Gas
MODEL
GFC7000E
Sample
IZS
Exhaust
Vent Span
Pressure Span
Purge In
VENT
Gas Pressure should
be regulated at
30 – 35 PSIG
Needle
valve to
control flow
Figure 3-9: Example of Pneumatic Set up for Multipoint Calibration of M360
3.2. Initial Operation
If you are unfamiliar with the MGFC7000E theory of operation, we recommend that you read
Chapter 10.
For information on navigating the analyzer’s software menus, see the menu trees described in
Appendix A.1.
NOTE
The analyzer’s cover must be installed to ensure that the temperatures of the GFC
wheel and absorption cell assemblies are properly controlled.