Operating instructions

ProMinent
®
Page 32
Repair
Repairing the diaphragm
rupture sensor
(TZMb only) The diaphragm rupture sensor must be checked after each diaphragm rupture and the separating
diaphragm replaced if necessary (e.g. if dosing medium has escaped), and if the dosing medium
is crystallising out or has entrained dirt and other particles.
Checking the diaphragm rupture sensor (30 V version):
왘 Unscrew the diaphragm rupture sensor from the dosing head whilst the diaphragm is being
changed
왘 Check that there is electrical continuity
왘 Press in the channel of the diaphragm rupture sensor with a blunt insulated rod
(2 – 3 mm diam. with no sharp edges)
왘 Check that the electrical continuity is lost
왘 Release the rod again
왘 Check that there is electrical continuity again
왘 If everything is in order, screw the diaphragm rupture sensor into the dosing head with a new
seal (1)
왘 If not, go to the next step.
Replacing the diaphragm rupture sensor (30 V version)
WARNING
• Isolate the diaphragm rupture sensor from the supply!
• If hazardous or unknown dosing media are being used, protect yourself from the dosing
medium!
• After a diaphragm rupture, dosing medium can be present in the diaphragm rupture
sensor and the delivery channel in the dosing head! (see Fig. 20)
왘 Unscrew the diaphragm rupture sensor from the dosing head whilst the diaphragm is being
changed
왘 Mount the diaphragm rupture sensor on the top section (2)
왘 Lock the body (5) in position with an open-ended spanner
왘 Unscrew the diaphragm rupture sensor
왘 Clean the contaminated parts
왘 Fit the new separating diaphragm (3) in the top section (2) with the bright side (PTFE) first
왘 Fit the plate (4) into the top section (2) with the uneven side first
왘 Screw the body (5) into the top section and tighten securely
왘 Check the diaphragm rupture sensor as described in “Checking the diaphragm rupture sensor
(30 V version)” above.
1 Seal
2Top section
3 Separating diaphragm
4 Plate
5 Body
Fig. 22
2
4
3
1
5
BA_MA_TZ_006_10_06_GB.p65 05.02.2007, 13:41 Uhr32