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

MAN0905_Issue 7_07/17 Searchpoint Optima Plus with optional HART output
®
Operating Instructions
2108M0550
10. Maintenance using
SHC1 Handheld Interrogator

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 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.
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