Operation Of Control Unit - Struers Tenupol-3 Mode D'emploi

Switch for voltage range
(Fig. 10.3)
Adjusting knob for setting
the polishing voltage (Fig. 10.4)
Switch for ammeter range
(Fig. 10.6)
Adjusting knob for
flow rate (Fig. 10.8)
Adjusting screw for
flow rate (Fig. 10.9)
Adjusting knob for
photo sensitivity (Fig. 10.10)
Tenupol-3
Instruction Manual

2.5. Operation of Control Unit

When Tenupol-3 has been installed and connected as described in section
INSTALLATION the instrument is switched on/off by using the main switch
O/I on the top left hand side of the front plate (Fig. 10.1).
When the instrument is switched on the square indicator lamp (Fig. 10.2) is
lit.
Note that the main switch together with the Start/Stop button is used to set
the instrument in "Adjust Mode". The procedure is described in section
OPERATION, Operation Parameters.
2.5.1. Controls
With the switch, it is possible to work in two voltage ranges. The low range,
5-45 V, is typically used for polishing aluminium, copper and brass. The
high range, 15-120 V, is typically used for stainless steels and iron, as well
as for pre-thinning and electrolytical blanking in the specimen holder with 10
mm inside diameter.
When the required voltage range has been selected the polishing voltage
can be set by using the double dial on the adjusting knob. Note that the
voltmeter only deflects during the polishing process.
The ammeter shows the current in the polishing circuit during the process.
The dial range suitable for the actual process is selected with the switch, i.e.
either 0-0.5 A or 0-5 A.
The rate of revolution of the pump motor and consequently also the flow
rate of the electrolyte through the jets in the polishing chamber is controlled
by the adjusting knob. The arbitrary dial from 1-10 is approximately
proportional to the flow, so that 1 is lowest flow and 10 is highest flow.
The adjusting screw moves the minimum range for the flow rate adjusting
knob. When turning the screw counter-clockwise the whole minimum range
is moved downwards. Correspondingly, the whole minimum range is moved
upwards when turning clockwise. The procedure is described in detail in
section OPERATION, Operation Parameters.
With this knob a potentiometric regulation of the IR-photo system sensitivity
can be made. Pos. 10 on the scale gives the highest sensitivity causing the
smallest hole.
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