Teledyne GFC-7000T - Trace CO2 Analyzer - manual - Manual (Page 180)

Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 162
7.1.2. Calibration Gas Traceability
All equipment used to produce calibration gases should be verified against standards of the National
Institute for Standards and Technology (NIST). To ensure NIST traceability, we recommend acquiring
cylinders of working gas that are certified to be traceable to NIST Standard Reference Materials (SRM).
These are available from a variety of commercial sources.
7.1.3. Data Recording Devices
A strip chart recorder, data acquisition system or digital data acquisition system should be used to record
data from the GFC 7000TA’s serial or analog outputs. If analog readings are used, the response of the
recording system should be checked against a NIST traceable voltage source or meter. Data recording
device should be capable of bi-polar operation so that negative readings can be recorded. For electronic
data recording, the GFC 7000TA provides an internal data acquisition system (DAS), which is described
in detail in Section 6.7.
7.2. Manual Calibration without Zero/Span Valves
This is the basic method for manually calibrating the Model GFC 7000TA CO
2
Analyzer without
functioning zero/span valve options. It is identical to the method described in the GETTING STARTED
(Section 3) of this manual and is repeated her for you convenience.
STEP ONE: Connect the Sources of Zero Air and Span Gas as shown below.
Figure 7-1: Pneumatic Connections–Basic Configuration–Using Bottled Span Gas