Honeywell Searchpoint Optima Plus - 10.7 Calibration

MAN0905_Issue 7_07/17 Searchpoint Optima Plus with optional HART
®
output
Operating Instructions
2108M0550
46
10.7 Calibration
Searchpoint Optima Plus is factory calibrated and does not require routine calibration. In most cases, a
re-zero will correct any inaccuracy in the gas reading. It is strongly recommended that a span calibration is
not carried out.
In the unlikely event that a span calibration is required, use a cylinder of the target gas, of approximately
50 %FSD, with an accuracy of at least ± 2 %.
Note:SearchpointOptimaPluswillacceptaspancalibrationgasconcentrationofbetween30%FSDand
125 %FSD, however this facility is reserved for use in specialist applications.
Do not calibrate Searchpoint Optima Plus during periods of very high or low atmospheric pressure, very
strong winds or storms.
Caution: Gas readings will be generated during this procedure.
Note:Theunitshouldbepoweredupfor1hourbeforeacalibrationisdone.
1. Usinga½inch/13mmA/Fopenendedspanner,unscrewthetworetainingnutsandremovethe
Standard Weather Protection.
2. Fit a Calibration Cap to the Searchpoint Optima Plus. Ensure it is pushed on fully.
3. Select Calibrate then CalSensor. (This will inhibit the 4-20 mA output signal).
4. Ensure that there is zero gas present in the vicinity of the Searchpoint Optima Plus. If necessary,
 applyzerogasatarateof1–1.5litresperminute.
5. 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.
6. Press Enter to begin span calibration.
7. Press Enter.
8. Use
and to set the concentration of the calibration gas. When it is correct, press Enter.
9. Applycalibrationgasatarateof1–1.5litresperminute.Waitforthegasreadingtostabilise
 (~30-60s).
10. Press Enter.
When the process is complete the display will show Span Calibrated. It will then show an instruction to
remove gas.
11.RemovetheCalibrationCapandwaitforthetestgastoclear(~30s).Ensurethatthegasreading
has returned to zero.
12. Press Enter.
13.RettheStandardWeatherProtectionandthetworetainingnuts.
14. Press Enter to release the 4-20 mA output signal.
15. Press Escape to return to the main menu.
10. Maintenance using
SHC1 Handheld Interrogator