ProMinent Makro TZ Operating Instructions Manual page 32

Repair
Repairing the diaphragm
rupture sensor
(TZMb only) The diaphragm rupture sensor must be checked after each diaphragm rupture and the separating
1
2
3
4
5
Fig. 22
1 Seal
2 Top section
3 Separating diaphragm
4 Plate
5 Body
Page 32
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):
Unscrew the diaphragm rupture sensor from the dosing head whilst the diaphragm is being
changed
Check that there is electrical continuity
Press in the channel of the diaphragm rupture sensor with a blunt insulated rod
(2 – 3 mm diam. with no sharp edges)
Check that the electrical continuity is lost
Release the rod again
Check that there is electrical continuity again
If everything is in order, screw the diaphragm rupture sensor into the dosing head with a new
seal (1)
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)
Unscrew the diaphragm rupture sensor from the dosing head whilst the diaphragm is being
changed
Mount the diaphragm rupture sensor on the top section (2)
Lock the body (5) in position with an open-ended spanner
Unscrew the diaphragm rupture sensor
Clean the contaminated parts
Fit the new separating diaphragm (3) in the top section (2) with the bright side (PTFE) first
Fit the plate (4) into the top section (2) with the uneven side first
Screw the body (5) into the top section and tighten securely
Check the diaphragm rupture sensor as described in "Checking the diaphragm rupture sensor
(30 V version)" above.
ProMinent ®