High Accuracy Operation; Dc Power Cord - PerkinElmer Photovac 2020 Manual

High Accuracy Operation

The 2020–dilution probe system can be calibrated for higher
accuracy operation. 2020 is calibrated with 100 ppm isobutylene and
the dilution probe is calibrated with 1000 ppm isobutylene.
To calibrate your 2020–dilution probe system for higher accuracy
operation:

DC Power Cord

105
1. Calibrate the 2020 as described in Calibration Using
the Flow-Match Regulator on page 70 or Calibration
Using a Gas Bag on page 73. Use 100 ppm isobutylene
as the calibration gas.
2. Connect the dilution probe to the 2020 inlet.
3. If you are calibrating directly from the calibration tank,
Insert the 2020 sample probe into the adapter tubing of
the regulator.
Ensure the calibration gas cylinder is upright, and open
the regulator by turning the valve counterclockwise.
Open the regulator until the ball is 1/8" from its rest
position. Do not set the flow rate too high.
4. If you are using gas bags, flush and fill the gas bags
with 1000 ppm isobutylene. It is advisable to obtain a
second calibration kit (Part No. MX390033) for the
1000 ppm isobutylene. See Preparing the Calibration
Gas Bag and the Zero Air Bag on page 73 for details
of filling the gas bags.
5. Adjust the metering valve until the display reads 10% of
the actual isobutylene gas concentration.
Connecting Accessories