Honeywell Searchpoint Optima Plus - Inspection of a Unit Fitted with a Flow Housing

MAN0921_Issue 1_05/12 Searchpoint Optima Plus
Safety Manual
5
13. Replace the Dust Barrier and Standard Weather Protection.
14. Press Escape then Enter to release the 4-20 mA output signal.
15. Press Escape to return to the main menu.
16. Select Diagnose then Soft Reset to clear any faults or warnings that may have been generated by
cleaning.
17. Press Escape to return to the main menu.
2.1.2 Inspection of a unit tted with a Flow Housing
Searchpoint Optima Plus should be inspected and cleaned.
Caution: Gas readings may be generated during this procedure.
1. Select Calibrate then Display 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 ow housing.
4. Using a ½ inch / 13 mm A/F open ended spanner, remove the two black nuts which retain the ow
housing. Keep the O-ring seals which are below the retaining nuts.
5. Slide the ow 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. Press Escape then Enter to release the 4-20 mA output signal.
8. Block the optical beam (for example using the cleaning cloth)
Optical Beam
9. Conrm that a fault is generated on the 4-20 mA output, either locally or at the controller.
Note: The 4-20 mA output can be monitored either at the control room or locally with a multimeter. When
connecting or disconnecting a multimeter, power off the Searchpoint Optima Plus, otherwise the unit will
indicate a latched warning that the 4-20 mA loop was broken. If this occurs it can be cleared by performing
a Soft Reset.
10. Remove the blockage from the beam
11. Select Calibrate then Display to inhibit the 4-20 mA output signal.
12. Ensure that the large sealing O-ring in the body of the ow housing, and the two small O-rings which go
below the retaining nuts, are clean and in good condition. Replace if in doubt.
13. Slide the ow housing over the end of the Searchpoint Optima Plus and push until the ow housing is
rmly seated.
2. Proof test using
SHC1 Handheld Interrogator