Bump Test (Gas Challenge) - Honeywell Searchpoint Optima Plus Operating Instructions Manual

MAN0905_Issue 7_07/17
3. 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.
4. Slide the flow housing off the Searchpoint Optima Plus. This may require some force due to the friction
of the O-ring.
5. 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.
6. 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.
7. Slide the flow housing over the end of the Searchpoint Optima Plus and push until the flow housing is
firmly seated.
8. Re-fit the o-rings and retaining nuts.
9. Cycle the power to clear any faults or warnings that may have been generated by cleaning.

7.4 Bump Test (Gas Challenge)

Searchpoint Optima Plus can be functionally checked using an appropriate test gas.
Caution: Gas readings will be generated during this procedure. Take appropriate action at the control
and monitoring system to inhibit signals.
Note: The unit should be powered up for 1 hour before a gas test is done.
Note: During testing 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 re-cycling the power.
1. Fit a Gassing Cover to the Searchpoint Optima Plus.
2. Apply an appropriate test gas at a rate of 1 – 1.5 litres per minute for ~ 30 - 60 s.
3. Check that the Searchpoint Optima Plus responds to the test gas. The reading should be within
±20 % of the target.
Note: If the gas reading is not acceptable for the application, re-zero the Searchpoint Optima Plus and
repeat the test. The SHC1 Handheld Interrogator, the HART
Transmitter is required to re-zero the Searchpoint Optima Plus. Factors to consider when evaluating the gas
response include: -
• Test gas and concentration
• Tolerance of the test gas concentration
• Atmospheric pressure
• Ambient temperature
• Wind speed
4. Remove the Gassing Cover and wait for the test gas to clear (~ 30 s). Ensure that the gas reading has
returned to zero.
7. Maintenance
33
Searchpoint Optima Plus with optional HART
communication or the XNX Universal
®
output
®
Operating Instructions
2108M0550