PerkinElmer Photovac 2020, Manual

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Appendices
169
Locki ng Ring
Tube Stub
Gas Bag Valve
Injec ti on Port
Septum Retai ner
Replacing the Septum
Remov e retai ner and
replac e sil icone septum .
Place septum with
Tefl on si de down.
Replac e retainer
Do not overtighten.
Ov ertightening may resul t
in needl e blocakge
Replace septum after
5-10 injections.To replace
septum , turn r etai ner counter-
c lock wi se. For replac ement
septa order Teflon bonded to
Si lcone, di ameter = .375" (9.5 mm)
Figure 31 Using the Gas Bag
Response Factors
The response factors were determined over the range 5 - 500 ppm,
based on a 100 ppm isobutylene calibration. Isobutylene RF = 1.0.
The following formula was used for calculation of response factors:
Response Factor = Actual Concentration
2020 Response
A response factor less than 1.0 indicates a compound response
better than that of isobutylene. A response factor greater than 1.0
indicates a lower response than that of isobutylene.