KROHNE OPTIMASS 7000 EN - Manual (Page 25)

INSTALLATION
3
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OPTIMASS 7000
www.krohne.com 04/2013 - 4001016302 - MA OPTIMASS 7000 R02 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.
Temperature [°C / °F] 1 Time [minutes] for Stainless Steel, Hastelloy® and Tantalum
measuring tubes
10 15 25 40 50 80
40 / 104 105 90
60 / 140 190 240
80 / 176 330 480
100 / 212 495 800
1 Measured at the centre of the measuring tube.
Ambient temperature +25°C / +80°F
Heating medium Hot liquid
Heating medium temperature
Titanium +150°C / +302°F
Stainless Steel, Hastelloy® and Tantalum +100°C / +212°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.
MA_OPTIMASS_7000_en_042513_4001016302_R02.book Page 25 Tuesday, July 2, 2013 5:23 PM