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MAN0530 Issue 09 October 03 Searchline Excel
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.
5.1 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 or window
cleaner 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 on the keyboard.
(5) Using the SHC1 Handheld Interrogator re-zero the unit.
See Appendix A for details about how to use the Interrogator.
5.2 FUNCTIONAL CHECKING
(1) Connect the SHC1 Handheld Interrogator to the Receiver.
(2) Select DISPLAY from the Calibration menu.
(3) Insert the appropriate Test Filter into the beam.
(4) Check the display reads as follows for the selected filter.
Receiver Calibrated For: Response to 1 LEL.m Response to 3 LEL.m
Filter Filter
Methane 1.0 - 1.7 LEL.m 2.0 - 4.3 LEL.m
Ethane 0.6 - 1.1 LEL.m 2.0 - 2.6 LEL.m
Propane 0.7 - 1.2 LEL.m 2.2 - 2.8 LEL.m
Butane 0.9 - 1.5 LEL.m 2.7 - 3.4 LEL.m
Pentane 1.0 - 1.7 LEL.m 2.9 - 3.6 LEL.m
Hexane 1.1 - 1.8 LEL.m 3.4 - 4.3 LEL.m
(5) If the display reading does not fall within the expected limits, refer to Chapter 6.
5. MAINTENANCE
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