INFICON 2020ppbPRO Portable Photoionization Detector - Manual (Page 66)

60 ISP-074-576-P1D 60
Calibration Introduction
The 2020ppbPRO must be calibrated in order to display concentration in ppm units
equivalent to the calibration gas. First, zero air, which should not contain any
ionizable gases or vapors, is used to set the 2020ppbPRO
’s zero point. Then, a
calibration gas, containing a known concentration of a photoionizable gas or vapor,
is used to set the sensitivity.
Due to the 2020ppbPRO ’s sensitivity, outdoor air is usually unsuitable for calibration
unless the intake sample conditioner tube (F1760162) and filter tube holder
(A1790500) is used.
NOTE: Ultra Zero air (99.999 % free of VOCs) may also be used for zero calibration in
combination with the intake sample conditioner tube (F1760162) and filter tube
holder (A1790500).
The same tube should be used for conditioning the calibration gas. Once calibration
is done, the tube is discarded and a new tube is used for sampling purposes.
If compound threshold limit values (TLVs) are exceeded, you should use a gas bag
for sampling and calibration.
To determine the TLV of the compounds contained in the calibration gas, refer to the
Material Safety Data Sheet (MSDS) supplied with your calibration gas cylinder.
If you will be using a gas bag for span gas calibration, see Calibration Using a Gas
Bag on page 63 for instructions.
NOTE: Disconnect the 2020ppbPRO from the AC adapter before beginning calibration.
Compressed Gases
Cylinders of compressed gas, such as calibration gas, must be handled with
extreme care. For safety, the calibration gas cylinders must be secured before use.
Please observe the following handling procedures:

Mark each new regulator with its intended gas service and never use a regulator
for more than one service. To ensure safety and avoid contamination, regulators
should be dedicated to one service. Do not change gas service or adapt
equipment without consulting your gas supplier.

Do not heat or expose cylinders or regulators to temperatures above 52°C
(125°F). The cylinders may rupture at high temperatures.

Use only the specified regulator for the calibration gas. Confirm regulator type
and material with your specialty gas supplier.

Always secure cylinders before removing the cylinder valve protection cap.

Do not drag or roll cylinders. Large cylinders should only be moved on carts
designed for compressed gas cylinders. Do not move cylinders without the valve
protection cap in place.

Wear safety glasses when working with compressed gases.

Do not store cylinders in a hazardous location. Store cylinders in an upright
position away from possible sources of heat or sparks.

Never plug, obstruct or tamper with safety relief devices.