KROHNE H250 M9 ES EN - Manual (Page 21)

SERVICE
6
21
H250
www.krohne.com 09/2012 - 4002294201 MA H250 KINAX R01 en
Service
6.1 Maintenance
Within the scope of routine maintenance of the system and pipelines, the flowmeter should also
be inspected for signs of fouling, corrosion, mechanical wear and leaks, as well as damage to
the measuring tube and indicator.
We advise that inspections be carried out at least once per year.
The device must be removed from the piping before cleaning.
6.2 Replacement and retrofitting
Some components of the variable area flowmeter can be exchanged or retrofitted:
• Float
• Float damping
6.2.1 Replacing floats
• Remove the device from the piping.
• Take the upper snap ring out of the measuring unit.
• Take the upper float stop and float out of the measuring unit.
• Insert the new float into the centre hole of the lower float stop and push into the measuring
unit along with the upper float catcher. While doing this, the float's upper guide rod must be
guided through the middle hole of the float stop.
• Insert the snap ring into the measuring unit.
• Fit the device back into the piping.
CAUTION!
Pressurized pipes must be depressurized before removing the device.
Empty pipes as completely as possible.
In the case of devices used for measuring aggressive or hazardous media, appropriate safety
precautions must be taken with regard to residual liquids in the measuring unit.
Always use new gaskets when reinstalling the device in the pipeline.
Avoid electrostatic charges when cleaning the surfaces (e.g. sight window)!
CAUTION!
An additional measuring error is to be expected if recalibration is not conducted.
MA_H250_Sonder_Kinax_R01_en_4002294201_PRT.book Page 21 Monday, September 17, 2012 11:13 AM