Inspection Of A Unit Fitted With A Flow Housing; Xnx Universal Transmitter Proof Test - Honeywell Searchpoint Optima Plus Sicherheitshandbuch

MAN0921_Issue 1_05/12
4. Proof test for a Searchpoint Optima Plus
being used with an XNX Universal Transmitter

4.1.2 Inspection of a unit fitted with a Flow Housing

Searchpoint Optima Plus should be inspected periodically and cleaned if necessary. The required frequency
of inspection will depend on local site conditions and will need to be established through experience.
Caution: Gas readings may be generated during this procedure.
1. Select Test Mode, then Inhibit and Set Inhibit On to inhibit the 4-20 mA output signal.
2. Inspect the Searchpoint Optima Plus unit, its junction box and cabling for any signs of physical damage.
3. Disconnect any pipework attached to the flow housing.
4. Using a ½ inch / 13 mm A/F open ended spanner, remove the two black nuts which retain the flow
housing. Keep the O-ring seals which are below the retaining nuts.
5. Slide the flow housing off the Searchpoint Optima Plus. This may require some force due to the friction
of the O-ring.
6. Clean any dust or contaminants from the optics using mild detergent and a soft cloth or cotton bud.
Do not use solvents or abrasive cleaners.
7. Block the optical beam (for example using the cleaning cloth).
Optical Beam
8. Confirm that a fault is generated by viewing the indication on the XNX display.
9. Remove the blockage from the beam.
10. Ensure that the large sealing O-ring in the body of the flow housing, and the two small O-rings which go
below the retaining nuts, are clean and in good condition. Replace if in doubt.
11. Slide the flow housing over the end of the Searchpoint Optima Plus and push until the flow housing is
firmly seated.
12. Re-fit the o-rings and retaining nuts.
13. Select Set Inhibit Off to release the 4-20 mA output signal.
14. Return to the main menu.
15. Select Calibration Mode then Soft Reset to clear any faults or warnings that may have been generated
by cleaning.

4.2 XNX Universal Transmitter Proof Test

After completing the tests in 4.1, please refer to the XNX Universal Transmitter Safety Manual (part number
1998-0808) and complete the Proof Test detailed there.
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Searchpoint Optima Plus
Safety Manual