Closing Down; Storage And Transport; Maintenance - M&C PMA Series Instruction Manual

For the gas mixture in example 2 the rectified sum cross sensitivity then is calculated in good approximation
for 20.93 vol% oxygen:
0.7907 x -0.1182 vol% = -0.0935 vol%
The rectified sum cross sensitivity with change of sign now can be used for the correction of the span cali-
bration. In this case span has to be adjusted at:
20.93 vol% + 0.0935 vol% = 21.02 vol%.
18

CLOSING DOWN

In case of a short time closing down of the process control system, the analyzer should remain „ON". No
further precautions are required.
In case of a closing down of the analyzer for a longer period, it is recommended to flush the analyzer with
dry and clean inert gas (eg. ambient air) in order to prevent a damage of the measuring cell by aggressive
and corrosive liquid gases.
19

STORAGE AND TRANSPORT

N O T E !
20

MAINTENANCE

Before carrying out any maintenance activities, the safety requirements specific to the instalment and the
process must be heeded!
W A R N I N G !
N O T E !
The physical measuring principle and the special design of the analyzer are minimizing the maintenance
requirements.
30
The analyzer should be stored in a protected frost-proof area!
Dangerous voltage. Before carrying out any maintenance work, take
the analyzer and all external switching circuits in connection with the
analyzer off the mains.
Only original spare parts and those corresponding to M&C specifica-
tions must be used!
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