Calibration With The Dilution Probe; Figure 21 Installing The Dilution Probe - PerkinElmer Photovac 2020 Manual

Calibration with the Dilution Probe

2020 must be calibrated in order to display concentration in units
equivalent to ppm.
Occasionally clean ambient air will be suitable as zero air. If there is
any doubt, use a commercial source of zero grade air and a
regulator or second sampling bag. Span gas of the desired compound
and concentration is also required and may be obtained from a
specialty gas supplier. See Calibration Gas Supplier on page 167.
Isobutylene at 100 ppm in air is recommended as span gas (Part No.
MX350012). If you are using another type of span gas, you must
obtain the required gas and concentration. If compound threshold
103
2. Use the long mounting screws supplied with the dilution
probe to connect the mounting bracket to the 2020
bottom housing. See Figure 21.
3. Use the short mounting screws and the washers to
connect the dilution probe to the mounting bracket.
Dilution Probe
Mou nting B ra cket
L ong
Mo unting Screw
Wa sher
Short
Mou nting Screw
Figure 21 Installing the Dilution Probe
Connecting Accessories
B ottom Housin g
Dilution Probe