Searchpoint Optima Plus Calibration Procedure; Searchpoint Optima Plus With Xnx - Honeywell VA201T Calibration Handbook

Searchpoint Optima Plus Calibration Procedure

Searchpoint Optima Plus is supplied factory calibrated for a particular hydrocarbon gas (approximately 100
different gas calibrations are currently available). Properly installed and maintained, Optima Plus does not
require routine calibration. This operational benefit is made possible by the inherent stability of the IR absorption
process and the fully compensated optical configuration used.
In order to maintain confidence in the continued correct operation of fielded Optima Plus units it is recommended
that a functional gas test is incorporated into the planned maintenance procedure for the unit. In most
applications and installations, a planned maintenance / service interval of 1 year is appropriate, although this
will depend upon site conditions and requirements. EN50073 and national regulations should be observed.
Where site operating procedures or regulations require routine calibration of gas detectors, this is possible
using the SHC-1 Handheld Interrogator and the gassing cover.
Care needs to be taken in order to ensure that routine field calibrations do not reduce the calibration accuracy
compared to the original factory calibration. (Factory calibration is performed in more controlled conditions
than are readily achievable in the field.)

Searchpoint Optima Plus with XNX

Equipment Required:
Gassing Cover
Instrument Air (if a zero in ambient air cannot be guaranteed)
Calibration Span Gas (i.e. 2.5% V/V methane for 50% LEL output or 2.2% V/V for 50% UEG)
1. From the Calibration menu, select the Gas Calibration option.
2. Perform a zero calibration. When concentration values are stable, select
adjustment .
3. Select to return to the Gas Calibration menu. If the zero calibration was successful, the transmitter will
display the Zero Passed screen
4. Begin the span calibration by entering the concentration value of the calibration gas: Select
the first digit. Use +/- to increment/decrement values. Select
digit. Use calibration cover P/N 2108B0272 to perform span calibration at a flow regulator of 1 LPM. (If a
span calibration is not required, select
Searchpoint Optima Plus
Sensor Reading
at Current Settings
to return to the calibration menu.)
Calibration Handbook
to accept the value and move to the next
107
for XNX to calculate the zero
to choose