Heath Consultants Detecto Pak-Infrared (DP-I) - Manual (Page 6)

102105-0 DP-IR MANUAL REV M
Page 6 of 35
Overview
The
HEATH Detecto Pak-Infrared (DP-IR™) uses highly advanced optical technology capable
of detecting methane gas utilizing the Infrared Controlled Interference Polarization Spectrometry
method. The DP-IR is the latest leak survey instrument from
HEATH that greatly improves
productivity, cost and safety of walking and mobile surveys.
The DP-IR functions by using an infrared optical gas detection system. This instrument is
intended to replace the current surveying equipment using the traditional Flame Ionization
method with next-generation technology utilizing an infrared light beam, eliminating the need
for expensive gas cylinders and refill systems. It is designed to be highly selective to detecting
methane gas and will not false alarm on other hydrocarbon gases which may be encountered
during a normal natural gas leak survey.
Figure 1: The DP-IR uses advanced infrared optical technology to achieve high sensitivity
to methane gas.
The DP-IR operates under a variety of field conditions, including cold and hot temperatures. Its
rugged design will stand up to normal field use and operating conditions.
The DP-IR has a built-in self-test function that will verify that the instrument is operating
properly. Using the internal calibration cell, the operator performs the self-test as part of a daily
start-up routine. While in operation, the DP-IR continuously monitors several internal parameters
to ensure that it is functioning properly. Should any of these parameters go outside of operational
limits, a constant audible alarm will sound and an ERROR icon will be displayed.