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Model GFC7000T Carbon Dioxide Analyzer
Teledyne Analytical Instruments 1
1. OVERVIEW
The Model GFC 7000T is a close derivative of the Model GFC 7000TA CO
2
Analyzer. The
main differences are as follows.
The optical bench is longer (14 m), making the instrument more sensitive at low CO
2
levels. The instrument has a user-selectable full scale range of 0-100 PPB to 0-100 PPM
of CO
2
.
The rear panel is different. There is an extra pneumatic port for the exhaust of the purge
gas to the GFC wheel. Also, there are relay alarm outputs available on the rear panel.
Refer to the main manual (i.e. GFC 7000TA) that is shipped with your instrument for
details of the instrument’s components and operation. Any differences between this
instrument and what is described in the GFC 7000TA, will be described in this Addendum
to the manual.
2. SPECIFICATIONS AND AGENCY APPROVALS
Table 2-1 presents the specification parameters and values, as well as agency approvals.
Table 2-1. GFC 7000T Specifications and Agency Approvals
PARAMETER SPECIFICATION
Ranges User selectable to any full scale range from 0-2 ppm to 0-2,000 ppm
Measurement Units ppb, ppm, µg/m
3
, mg/m
3
(user selectable)
Zero Noise < 0.1 ppm RMS
Span Noise < 1% of reading RMS
Lower Detectable Limit < 0.2 ppm
Zero Drift (24 hours) < 0.25 ppm
Span Drift (24 hours) < 0.5% of reading
Linearity 1% of full scale
Precision 0.5% reading
Lag Time 10 sec
Rise/Fall Time <60 sec to 95%
Sample Flow Rate 800 cm
3
/min. ± 10%
Temperature Range
5 - 40C operating
Humidity Range 0-95% RH, Non-Condensing
Temp Coefficient
< 0.05 % of reading per C
Voltage Coefficient < 0.05 % of reading per V
Dimensions (HxWxD) 7" x 17" x 23.5" (178 mm x 432 mm x 597 mm)
Weight 40 lb (18.1 kg)
AC Power 100 – 120V 50/60 Hz,