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

Transmitter / Receiver Removal Procedure

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

Sign off on the removal of the transmitter / receiver

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.

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)

The test gas must be the same as the test gas used during the initial calibration of the Searchline Excel Plus & Searchline Excel Edge units and ideally the concentration should be between 2 and 5 LEL.m, never below 1 LEL.m.

Note: Cross-calibration is not recommended. Typical values for cross-sensitivity are not sufficiently precise to enable valid calibration checks using the gassing test cell.

Response tests can easily be performed with the functional test filters as described in Chapter 9.3.

WARNING: Take necessary precaution to ensure safety when dealing with high concentration gasses.

The gassing test cell supplied by Honeywell Analytics (Part No: 2017B0185) is 170 mm (6.7 in) long with gas path 138.8 mm (5.46 in) long and the following table outlines the response expected when using this gassing test cell:

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 receiver 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 counter-clockwise, and pull it out completely.

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

Sign off on the receiver module replacement

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