Honeywell Searchpoint Optima Plus - 13.6 Re-zero Searchpoint Optima Plus; 13.7 Calibration

MAN0905_Issue 7_07/17 Searchpoint Optima Plus with optional HART
®
output
Operating Instructions
2108M0550
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Note:Ifthegasreadingisnotacceptablefortheapplication,re-zerotheSearchpointOptimaPlusand
repeat the test.
13.6 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.
Caution: 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.
1. Select Device Setup.
2. Select Calibrate.
3. Select Gas Calibration.
4. The display shows a warning message, press OK.
5. EnsurethatthereiszerogaspresentinthevicinityoftheSearchpointOptimaPlus.Ifnecessary,ta
Gassing Cover and apply zero gas.
6. WhenthegasreadingonthedisplayisstablepressOKtoinitiatetheZeroCalibrationandthenwaitfor
approximately 15 s. The 4-20 mA output will be inhibited automatically at this time.
7. The display shows a message that the Zero Calibration was successful and offers to exit without a Span
Calibration. Select Yes and press Enter.
8. ThedisplayshowsanotethattheSearchpointOptimaPluswillreturntonormaloperation,
press OK.
9. Return to the Welcome screen.
13.7 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. The 4-20 mA output will be inhibited
automatically. If the procedure is aborted, ensure that the unit is not left in Inhibit mode.
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
13. Maintenance using HART
®
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