7
Annex
7.1
Adjustment: Behaviour during zero adjust
To comply with MARPOL Annex 6/MEPC.259(68) requirements, the SO
2
/CO
2
ratio must
be determined continuously. During zero point adjustment or reference point adjust‐
ment, the displayed values are not usable for compliance monitoring.
The behavior of the measured values during adjustment can be determined.
The following options are available:
•
Factory setting
•
Option “Freeze measured values”
7.1.1
Adjustment procedure
•
The bellows valve on the gas sampling unit SFU is closed.
•
The maintenance signal is activated.
•
The measuring system is purged with instrument air.
•
Zero point adjustment or reference point adjustment is performed.
•
The bellows valve is opened again.
•
The measuring system is flooded with measuring gas.
•
The maintenance signal is deactivated as soon as the measurement is meaning‐
ful.
ANNEX
7
8026470/AE00/V1-0/2021-04 | SICK
A D D E N D U M T O O P E R A T I N G I N S T R U C T I O N S | MARSIC300
21
Subject to change without notice
