Bump Test (Gas Challenge) With Remote Gassing Cell (Rgc) - Honeywell Searchpoint Optima Plus Operating Instructions Manual

MAN0905_Issue 7_07/17
13. Maintenance using HART
9. Remove the Gassing Cover and wait for the test gas to clear (~ 30 s). Ensure that the gas reading has
returned to zero. Press OK to release the 4-20 mA output.
10. Return to the Welcome screen.

13.5 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. The 4-20 mA output will be inhibited
automatically. If the procedure is aborted, ensure that the unit is not left in Inhibit mode.
Caution: Maximum flow 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) fitted.
The RGC is a factory fitted option.
High Concentration
(v/v cell) Nozzles
1. Inspect the gassing pipes to the RGC. Ensure that the exhaust is clear and vents well away from the
Searchpoint Optima Plus, and does not cause a hazard.
2. Select Device Setup.
3. Select Calibrate then Bump Test.
4. Select Start Bump Test and press Enter.
5. The display shows a confirmation message, press OK. The 4-20 mA output is now inhibited.
6. Apply 50 %v/v methane at a rate of 0.3 litres per minute for ~ 30 - 60 s. (For long gas pipes >
~10 m, allow a longer time for the gas to reach Searchpoint Optima Plus).
7. Check that the Searchpoint Optima Plus responds to the test gas. The live gas concentration is shown
on the screen. When ready to continue press OK.
8. Flush the RGC with zero gas until the gas reading has returned to zero. Press OK to release the
4-20 mA output.
9. Return to the Welcome screen.
Communications
Remote Gassing Cell
64
Searchpoint Optima Plus with optional HART output
®
Operating Instructions
2108M0550
®