INFICON 2020ppbPRO Portable Photoionization Detector - Manual (Page 41)

ISP-074-576-P1D 35
ionized molecules in the detector cell. An electrometer circuit converts the current to
a voltage which is then fed to the microprocessor.
The UV lamp is operated by a high voltage lamp driver circuit which delivers high
voltage energy to the lamp through plates in the lamp holder. The lamp driver power
supply is controlled by the microprocessor based on a feedback signal from a light
sensor on the driver circuit board.
Unpacking Instrument
Remove the 2020ppbPRO from its shipping box. The following accessories are
included with the 2020ppbPRO:
1. Sample Probe
2. Instrument Manual (on CD)
3. Multi-Tool
4. AC Adapter or AC Adapter with AC Line Cord
5. Replacement Sample Inlet Filters (10 pieces)
6. Reference Card
7. Water-trap Filter
8. INFICON filter tube holder
9. Intake sample conditioner tubes
Ensure that all of these accessories have been included with the instrument. If any
items are missing or damaged, contact INFICON immediately.
Support Equipment and Consumables
Calibration
For normal operation these items are required:
1. Calibration Gas Regulator (Part No. MX350006).
2. Calibration gas containing 10 ppm isobutylene (Part No. MX350025).
Other concentrations of the calibration gas may be required. This will
depend on your application.
3. Zero air (clean dry air without any organic impurities)
There are several alternatives for clean or zero air calibration: you can
use a bottle of clean air (certified as having not more than 0.1 ppm total
hydrocarbons) connected directly to the instrument; the clean air can be
transferred to a Tedlar bag which can then be connected to the
instrument; clean, ambient air without detectable contamination; or,
ambient air run through the charcoal filter (F1760160).
If you will be using large tanks of gas, specify a single stage, high purity
regulator with a CGA 590 connection at the inlet. The regulator should
also have a 1/8” parallel, compression fitting with which to connect the
regulator to the gas bag adapter. The delivery pressure must be
adjustable to between 5 psig (34.5 kPa). You may require a gas bag
and gas bag adapter (Part No. MX380014).