TARGAS-1 Operation Manual V. 1.02 97 support@ppsystems.com
Where
CO
2 INT
(ppm) = calculated CO
2
concentration inside syringe (“integrated” CO
2
)
CO
2_ b
(ppm) = baseline CO
2
readings before the measurement phase (averaged over 10
readings)
CO
2_m
(ppm) = CO
2
readings during the measurement phase
Δt (s) = sample interval, typically 1 second
F (ml min
-1
) = flow rate
V (ml) = syringe volume
The process consists of two phases: Baseline Phase and Measurement Phase. The Baseline Phase
establishes a baseline measurement of CO
2
concentration by passing CO
2
-free gas through the
TARGAS-1 and calculating the average concentration over 10 measurements at a 1-second interval.
Upon completion of the Baseline Phase, the instrument will enter the Measurement Phase. In this phase
the sample is slowly injected, and the measured CO
2
concentrations are integrated over the duration of
the Measurement Phase. Any gas with a known, constant CO
2
concentration can be used as a baseline,
but a gas with zero CO
2
concentration can be readily produced with an absorber column filled with soda
lime.
Sample Injection Kit (Part No. ACS037)
PP Systems offers a Sample Injection Kit (Part No. ACS037),
which includes a fully assembled and leak-tested injection
port with 4 spare septa, as well as an absorber column to
establish a zero baseline.
The syringe is user supplied (not included with the kit) and
the soda lime is not included with this part but it is included
with the TARGAS-1 as standard.
The injection port includes a 9mm low-bleed septum that can withstand up to 50 injections (per the
manufacturer’s specification). For best results, we recommend changing the septum every 25 injections.
The septum has a guide hole and accommodates syringes up to 22 gauge. We recommend 18 gauge for
best results. The syringe is not included in the kit and must be provided by the user. The injection
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