Re-Zero Searchpoint Optima Plus - Honeywell Searchpoint Optima Plus Operating Instructions Manual

MAN0905_Issue 7_07/17
SHC1 Handheld Interrogator
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 Calibrate then Display. (This will inhibit the 4-20 mA output signal).
3. 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).
4. Check that the Searchpoint Optima Plus responds to the test gas.
Note: If the gas reading is not acceptable for the application, re-zero the Searchpoint Optima Plus and
repeat the test.
5. Flush the RGC with zero gas until 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.

10.6 Re-zero Searchpoint Optima Plus

Re-zero Searchpoint Optima Plus if it has given an unexpected response to a gas test. In most cases a
re-zero will restore accuracy and a full span calibration is not required.
1. Select Calibrate then CalSensor. (This will inhibit the 4-20 mA output signal).
2. Ensure that there is zero gas present in the vicinity of the Searchpoint Optima Plus. If necessary, fit
a Gassing Cover and apply zero gas.
3. Press Enter.
When the process is complete the display will state Zero Calibrated. It will then show options to continue to
a span calibration, or to exit calibration.
4. Press Escape to exit calibration.
5. Press Enter to release the 4-20 mA output signal.
6. Press Escape to return to the main menu.
Note: If the option to Calibrate Span is selected in error, press Escape.
10. Maintenance using
Remote Gassing Cell
Searchpoint Optima Plus with optional HART
45
output
®
Operating Instructions
2108M0550