Honeywell Searchpoint Optima Plus - 10.4 Bump Test (Gas Challenge)

MAN0905_Issue 7_07/17 Searchpoint Optima Plus with optional HART
®
output
Operating Instructions
2108M0550
44
10.4 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.
Note:Theunitshouldbepoweredupfor1hourbeforeagastestisdone.
1. Select Calibrate then Display. (This will inhibit the 4-20 mA output signal).
2. Fit a Gassing Cover to the Searchpoint Optima Plus, if not already in place.
3. Applyanappropriatetestgasatarateof1–1.5litresperminutefor~30-60s.
4. Check that the Searchpoint Optima Plus responds to the test gas. The reading should be within
±20 % of target.
Note:Ifthegasreadingisnotacceptablefortheapplication,re-zerotheSearchpointOptimaPlusand
repeatthetest.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
5. RemovetheGassingCoverandwaitforthetestgastoclear(~30s).Ensurethatthegasreadinghas
returned to zero.
6. Press Escape then Enter to release the 4-20 mA output signal.
7. Press Escape to return to the main menu.
10.5 Bump Test (Gas Challenge) with Remote Gassing Cell (RGC)
Usingatestgasof50%v/vmethaneintheRemoteGassingcell(RGC),agasresponsewillbegenerated
from most Searchpoint Optima Plus units. The reading depends on the target gas calibration of the unit.
The RGC is a tool to check for a gas response and is not precise; therefore variability in response between
units should be expected.
Caution: Gas readings will be generated during this procedure.
Caution: Maximum ow rate is 0.3 litres per minute to avoid pressurising the gas in the RGC.
Note:ThisprocedureonlyappliesiftheSearchpointOptimaPlushasaRemoteGassingCell(RGC)tted.
TheRGCisafactoryttedoption.
10. Maintenance using
SHC1 Handheld Interrogator