Honeywell Open Path Flammable Hydrocarbon Gas Detector Searchline Excel Plus Open Path GAS DETECTOR

CAUTION; Prerequisite for calibration check using the gassing test cell is installation of the Honeywell Fixed Platform App to the handheld device.

CAUTION: In some cases the use of the gassing test cell may distort Receiver alignment and trigger a misalignment warning indication during or shortly after the test. This warning indication is irrelevant to the test itself and can be ignored. The warning shall cease in 2 minutes after the gassing test cell is removed from the receiver unit.

The gassing test cell allows calibration to be checked using a user-specified gas concentration, as an alternative to the standard functional test filters.

The integrated LEL.m reading of the gas concentration in the test cell can be calculated using the following formula:

Int(LEL.m)xl = Lcell * (Concgas / LELgas)

Int(LEL.m)xl = Integrated LEL.m reading output by Searchline Excel Plus & Searchline Excel Edge in LEL.m

Lcell = Length of test cell in metres

Concgas = Gas concentration in %v/v

Remove the bolt cover plate (Figure 13)

Hold the instrument body to prevent from tilting during disassembly and loosen the spigot vertical M10 bolt

Remove the instrument from its Universal Mounting Bracket

CAUTION: Front enclosures may be opened only for advised repair maintenance by an authorized and qualified person.

Note: This enables quick and easy repair via replacement of the electro-optical modules.

Unscrew the antenna cover from the top of the transmitter and remove the sunshade.

Loosen the grub screw on the front cover.

Follow the bayonet grooves and pull the module slightly out, then turn it clockwise, and pull it out completely.

To re-assemble the transmitter, perform the above procedure in reverse order.

Sign off on the transmitter module replacement

CAUTION: Do not use solvents or abrasives on the Searchline Excel Plus or Searchline Excel Edge transmitter or receivers.

1. Inspect the detector and cabling for signs of physical damage.

2. Use the IS Handheld Unit and the Honeywell Fixed Platform App to inhibit the 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.)

3. Clean any dust or dirt from the detector unit using soapy water and a damp soft cloth.

4. Use the App to release the signal output.

5. Use the App to re-zero the unit.

Functional Testing using Functional Test Filters

In order to use the Functional Test Filters, access to the front of the receiver is required.

Note: Refer to the test sheet that was supplied with the receiver for the original filter and response measured by the factory. Wherever possible this should be used as a reference for all subsequent tests.

Note: An extender pole may be utilized for testing Searchline Excel at height.

1. Ensure the area is gas free.

2. Ensure the receiver window is clean.

3. Slide the LOW TEST FILTER into the cowling at the front of receiver.

4. Receiver LED status indicator should flash red.