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MAN0530 Issue 09 October 03 Searchline Excel
2104M0506
The majority of gas detector problems/faults can be diagnosed and corrected using the installation
and alignment kit.
The alignment kit includes:
• SHC1 Handheld Interrogator
• alignment telescope
• set of functional test filters
An electrical multimeter is also useful when diagnosing electrical/wiring problems.
Refer to the troubleshooting tables in this chapter for a list of problems, possible causes and
actions.
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.
RS485 Modbus signal errors may occur when Excel is connected via a DX100 (M) Termination
Unit and is interrogated/commanded from a network control centre. For troubleshooting these
issues refer to the DX100 Series Termination Units Technical Handbook.
If, after following the recommendations in this section, the problem persists, please make available
the following information before contacting Zellweger Analytics:
• Installation Check Sheet
See Chapter 3.
• Any error message
Displayed on the Handheld Interrogator screen.
• Any error code
Displayed on the Handheld Interrogator screen.
Fault/Problem Causes Remedies
Output is 0mA Unit is in FAULT condition Connect the SHC1 Interrogator to the unit and use its
DIAGNOSTIC menu options to ascertain the reason for the
FAULT report.
Beam block Check that beam path is clear from the Transmitter to
the Receiver. Remove any obstruction if present.
Transmitter or Receiver 1) Connect the SHC1 Handheld Interrogator to the
misaligned unit and check the signal levels.
2) If signal levels are low, use the telescope and
Interrogator to optimise Receiver alignment.
3) If signal levels remain low after re-aligning
Receiver, check the Transmitter alignment using
telescope.
4) Re-zero the unit after alignment. See Appendix A.5.3.4.
6. PROBLEM SOLVING
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