KROHNE OPTIMASS 1000 EN - Manual (Page 25)

INSTALLATION
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OPTIMASS 1000
www.krohne.com 04/2011 - 4000977901 - MA OPTIMASS 1000 R01 en
Reference conditions
3.4.10 Purge ports
If the meter has been ordered with a purge port, it will be supplied with NPT female connections
which are clearly marked. The connections are sealed with NPT plugs and PTFE tape.
3.4.11 Zero calibration
The procedure for zero calibration is contained in the converter handbook. However, the
following information should be considered when installing the meter.
Ambient temperature +25°C / +77°F
Heating medium Hot liquid
Heating medium temperature +130°C / +266°F
CAUTION!
DO NOT remove these plugs.
The meter is factory sealed with a dry nitrogen gas fill and if moisture is allowed to enter the
meter casing it will cause damage. The plugs should only be removed to purge the meter casing
in the event that the primary measuring tube fails.
If it is suspected that the primary measuring tube has failed, de-pressurise the meter and
remove it from service, as soon as it is safe to do so.
Zero calibration
1 Where the meter has been installed vertically, install shut-off valves either side of the meter to assist with zero cali-
bration.
2 If the process flow cannot be stopped, install a bypass section for zero calibration.
MA_OPTIMASS_1000_en_110401_4000977901_R01.book Page 25 Friday, April 1, 2011 1:41 PM