INFICON 2020ComboPRO Portable Photoionization Detector - Manual (Page 108)

ISP-074-575-P1D 101 101
Installing an Alternate AC Plug on the Battery
Charger
In most cases the 2020ComboPRO will be shipped with an AC line cord that will fit
the AC wall outlet in your area. If this cannot be done, you may need to obtain an
AC line cord suitable for the AC receptacle in your area.
The AC line cord, attached plug and receptacle must be marked with your country’s
certification mark and the cord must have a Harmonization (HAR) mark.
The line cord must be rated for either 100 to 120 VAC at 60 Hz or 220 to 240 VAC
at 50 Hz. The voltage rating will depend on the voltage in your area.
Contact your INFICON representative to obtain more information.
Calibration Gas Supplier
The recommended span gas is isobutylene in air. 1ppm, 10ppm, or100 ppm
isobutylene in air may be obtained from INFICON.
The exact concentration will be determined by your application. Other
concentrations and other gases may be obtained from your local gas supplier. If you
cannot locate a local gas supplier, contact INFICON’s Technical Support
Department.
Presets and Response Factors
Presets simplify Memory Slot programming, and provide standard response factors
and alarm levels for approximately 100 compounds. The name, response factor and
three alarm levels are all set from the preset.
You can change any of the values entered in the Memory Slots. Changes made to
the library information that has been loaded into a Preset will have no effect on the
original library entry.
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 is used
for calculation of response factors:
Response Factor = Actual Concentration
2020ComboPRO 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.