H-25C Instruction Manual
Instruction 3015-0216
53
[Reference] Facilities for Ridding the Atmosphere of Unwanted
Gases Where Leakage Inspections Are Made
Sensors in the H-25C Halogen Leak Detector sense exhaust gases from automobiles and volatilized gases from organic
solvents, floor cleaning agents, and -paint as well as halogen gases including freon. Thus, if any of these gases are in
the surrounding atmosphere of locations when inspections for leakage are made, the following two problems may occur.
1. The service life of sensors and activated charcoal filters is shortened.
2. It becomes difficult to find and measure slight leaks.
If these problems are anticipated, it is recommended that the facilities described below be provided.
[Example 1 of Proper Facility]
Reference Figure 1 shows an example of a facility that helps extend the service life of sensors and activated
charcoal filters. As shown in the figure, providing a facility with clean air that can be auctioned through the sensor
probe when preparing for measurement greatly reduces the time needed to suction the unwanted gases. This
not only prolongs the service life of sensors and activated-charcoal filters, but also makes accurate calibration
(based on clean air as the background) possible in locations where inspections for leakage are made.
In addition, provide such a facility by taking into account the following requirements:
(1) Do not allow moisture to collect on the inside of the delivery tube as droplets.
(2) Make sure the e is securely fastened (cannot drop).
