16
4. 5
Repair of oscillating systems
Return ultrasonic cleaners TK 100 and TK 100 H for repair to the supplier. The following repair
instructions are not applicable for flat oscillating systems.
The oscillating systems are located under the bottom of the tub. Depending on the type of unit,
oscillating systems with one or two PZT-rings are used.
(PZT
⇒
piezoelectric ceramic
⇒
lead-zirconate-titanate).
In the following cases the oscillating systems must be replaced:
-
PZT-ring destroyed, tear (possibly visible)
-
electrical flashovers on the transducer or on the interior insulating bushes (not visible).
However, if the adhesive has become detached (this can be determined by knocking on the tub's bottom
from inside), the unit must be returned to the supplier for repair.
For the repair of oscillating systems you need torque spanner with hexagon pin 8 mm, spanner SW 7
and pin spanner with 3,8 mm pins (e.g. Belzer No. 4307).
4. 5. 1 Disassembly of defective oscillating systems
- Before disassembling the oscillating system remove transducer wires from the generator plate and
plug them together (short circuit) otherwise you can get an electric shock. Remove transducer wires.
- Hold the steel bush with pin spanner, remove hexagon socket screw.
- Remove all parts.
Attention : Cu-Be discs to be disposed as special waste.
4. 5. 2
Assembly of oscillating systems
-
All parts must be replaced (see replacement parts).
- Ensure
highest degree of cleanliness during assembly.
-
Clean parts in suitable cleaning agents e.g. white spirit, acetone or thinner and dry them.
-
Check evenness of cone with a straight-edge, the supporting surface must be clean and show no
signs of scoring. If the surface is damaged or not even, the unit has to be returned to the supplier.
Order of assembly
Before mounting the steel bush and the hexagon socket head screw, DIN 912, M 10 × 40 it must be
ensured that all parts are centred on the insulating bush (pay special attention to the Cu-Be discs).
-
Short-circuit the transducer wire (plug together)
-
Hold the steel bush with the pin spanner and tighten the hexagon socket head screw, DIN 912, with
a torque of 45 Nm (~ 4.5 kpm). (approx. 32,5 ft lbs.)
-
Connect the blue silicone wire to the Cu-Be disc between the transducer rings, connect the red wire
to the supported CuBe disc. Mount the transducer wire, angle, spring washer and nut and screw
tighten them. Cover the connection with silicone. When renewing the transducer wire, only use
silicone wire.
