Tubes Handbook 18th Edition (EN) - May 2018

72| Dräger-Tubes & CMS-Handbook
The duration of the flushing phase depends on factors such as:
– type and concentration of the substance to be measured,
– material, length, diameter, and age of the extension hose.
There is no standard flushing time that can be stated that would be valid for all cases. All
possible factors affecting the measurement must be considered. Please always refer to the
Instructions for Use of the Remote System and the Instructions for Use of the Chips.
The flushing times given in the Instructions for Use have been determined for the specified
gas concentrations only. The values refer to the extension hose supplied with the remote
System (e. g. length: 3 m, inside diameter: 1.5 m, new, dry, clean) in laboratory conditions.
3.8 Validation of Third Parties
Performance data of each measuring system can be found in the instructions for use.
Usually the technical data will be checked by independent institutions. The results will
be described from the test organization in a validation report. To date, the Chip-Measurement-System
has been tested by the following independent institutions or laboratories:
- Authority for Civil Defence, Germany, Bonn-Bad Godesberg
- Institute of Fire Department Sachsen-Anhalt, Germany, Heyrothsberge
- Clayton Laboratory Services, USA, Detroit
- Austrian Workplace Safety Testing Institute of the Employee's Liability Insurance
- Association, Austria, Vienna
Authority for Civil Defence, Germany
The operation and function of the Dräger CMS were tested. Using the Remote System, measurements
against different test gas concentrations were performed. Ten chip-types were
checked:
- Ammonia 2 - 50 ppm - Hydrochloric Acid 20 - 500 ppm
- Ammonia 10 - 150 ppm - Hydrocyanic Acid 2 - 50 ppm
- Carbon Monoxide 5 - 150 ppm - Hydrogen Sulfide 2 - 50 ppm
- Chlorine 0.2 - 10 ppm - Hydrogen Sulfide 20 - 500 ppm
- Hydrochloric Acid 1 - 25 ppm - Nitrogen Dioxide 0.5 - 25 ppm