Design - struers Tenupol-3 Gebrauchsanweisung

Pump system (Fig. 3)
The polishing cell (Fig. 4)
Tenupol-3
Instruction Manual

2.4. Design

The instrument comprises the following main parts:
2.4.1. Control Unit
A cable connects the polishing unit to the control unit. The cable contains all
connections to the polishing chamber, pump and IR transmitter/receiver.
The connection is done with a multi-plug on the right hand side of the
control unit. The sturdy steel cabinet contains power supply, electronics and
regulations for polishing voltage, photo sensitivity, flow rate and timer. Two
indicating instruments indicate voltage and current respectively during the
process.
It is possible to compensate for deviations of different electrolytes by setting
the instrument in "Adjust Mode". In this mode Flow rate can be optimized to
the electrolyte in question.
2.4.2. Polishing Unit
The polishing unit comprises a PVC base plate (Fig. 2.1) on which the pump
system (Fig. 2.2), the polishing cell (Fig. 2.3) with jets and specimen holder,
a cooling coil (Fig. 2.4) as well as a thermometer (Fig. 2.5) are mounted.
Depending on the chosen cooling method the base plate is placed on an
insulated or non-insulated PVC-reservoir.
The electrolyte pump (Fig. 3.1) is a pressure pump made of PVC, which
presses the liquid up through a Y-tube connection to the two symmetric
polishing chambers in the polishing cell. The pump motor (Fig. 3.2) on top of
the base plate is covered by a housing made of anodized aluminium (Fig.
3.3) and PVC (Fig. 3.4). The bearings of the motor are sealed from
electrolyte-vapors and splashing by a V-ring seal (Fig. 3.5), which is
mounted on the motor shaft.
Electrolyte is pumped up into two symmetrical chambers (Fig. 4.1) in the
polishing cell from the above mentioned connection of the Y-tube. The
polishing cell is made of PVC. The electrolyte passes from the two
chambers through the two jets (Fig. 4.2), hits the specimen in the specimen
holder (Fig. 4.3), and returns to the reservoir.
In the middle part of the polishing cell a spring contact (Fig. 4.4) is built-in so
that the specimen holder is connected to the polishing circuit.
The IR-transmitter and -receiver (Fig. 4.9) respectively are mounted in the
two symmetrical end covers (Fig. 4.5). The IR-detector system is operated
from the front plate of the control unit.
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