Table of Contents
Advertisement
MAN0530 Issue 10 - 11/09
2104M0506
The Searchline Excel Open-Path Gas Detector requires little maintenance other than occasional
cleaning.
Depending on the local regulations and site conditions, cleaning and functional testing of the
gas detector can be carried as described in the following sub-sections. The gas detector should
remain powered during these procedures.
Caution: searchline excel does not contain any user serviceable parts. do not open
either the transmitter or receiver unit. the warranty of units which have been
opened is invalidated.
Note:
the iNfrared beam is iNvisible aNd eye safe.
4.1 INSPECTION AND CLEANING
Caution: do not use solvents or abrasives on the searchline excel units.
(1)
Inspect the Searchline Excel units, junction box and cabling for signs of physical
damage.
(2)
Using the SHC1 Handheld Interrogator inhibit the Searchline Excel signal output.
Since the signal output may vary during cleaning, due to the optical path being disturbed,
it is important to inhibit the analogue output. The quickest way to inhibit the Excel output
is to select DISPLAY from the Calibration menu.
(3)
Clean any dust or dirt from the Searchline Excel windows using soapy water and a soft
cloth.
(4)
Using the SHC1 Handheld Interrogator release the Searchline Excel signal output.
The output can be released by pressing esC followed by
(5)
Using the SHC1 Handheld Interrogator re-zero the unit.
See Appendix A for details about how to use the Interrogator.
4.2 FUNCTIONAL TESTING (Plastic Test Filters)
From January 2004 onwards, a new range of plastic test filters has been available for performing
functional testing on Searchline Excel. They are lettered from A to H, with the reading a filter
produces increasing in alphabetical order.
Whilst the new filters can be used with all Mod states of Searchline Excel units, they have been
specifically designed to work with open path Excel units of Mod state 7 (or higher).
The part number for the new test filter set is 2104N2999.
Testing of Mod state 6 (or lower) open path Excel units should continue to be performed using
the original plastic test filters, with the results to be anticipated detailed in Issue 8/9 of the
Technical Handbook, 2104M0506.
4. MAINTENANCE
Searchline Excel
on the keyboard.
Hide quick links:
Advertisement
Table of Contents
