Maintenance
Instruction manual 854 ATG Page 39
5.3.2 Removing the measuring drum
Removing the drum from the housing requires no tools. Keep the drum, the outer magnet and the outside of
the magnet cap thoroughly clean.
To remove the drum proceed as follows:
• Issue the CA (calibrate) command to raise the displacer
• If applicable close the ball valve and release the pressure gently.
• Give UN (unlock) command to lower the displacer from tank top position.
• Issue a FR (freeze) command when the displacer comes within reach.
• Switch-off the mains.
• Remove the drum compartment cover.
• Remove the displacer from the measuring wire. Attach a small weight on the wire to keep it positioned in
the groove. Do not damage the measuring wire.
• Pull out the drum and fix the wire to the drum with a rubber band.
• Do not kink the measuring wire and handle drum carefully.
If the displacer cannot be accessed through an opening the gauge must be removed from its mounting
position:
• Raise the displacer to maximum height, at least above the ball valve, when present.
• Switch-off the mains.
• If applicable close the ball valve and release the pressure gently.
• Remove the drum compartment cover.
Take off the 854 ATG, raising the displacer above the connecting flange.
• Remove the displacer from the measuring wire.
• Pull out the drum and fix the wire to the drum with a rubber band.
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