struers Tenupol-3 Gebrauchsanweisung Seite 15

Polishing-diode (Fig. 10.15)
Lamp for
Thermal Overload (Fig. 10.17)
Automatic fuse 2 A (Fig. 10.16)
Automatic fuse 5 A (Fig. 13.1)
Sound signal
Tenupol-3
Instruction Manual
With the color red the diode indicates that the polishing has started, and
with the color yellow that the instrument is in "Adjust Mode":
Red indicates that there is a current in the polishing circuit, a current which
can be read on the ammeter. Note that the red reading comes a few
seconds after activating the start button. Before the polishing process starts
the pump works for a short time at full speed in order to fill the liquid system
with electrolyte. When this is done the rate of revolution decreases to the
preset rate on the "Flow rate" knob, and the polishing circuit is closed.
Note that a polishing current should be read on the ammeter. If the polishing
diode lights red, while the ammeter shows 0. there is no current. The reason
for this may e.g. be faulty mounting of the specimen in the specimen holder,
that the specimen holder is not mounted correctly in the specimen holder,
that the electrodes in the jet holders have not been correctly connected, that
there is breakage and faults in the wire connections, or other faults in the
polishing circuit.
A thermal fuse is built into the transformer. This overload fuse cuts out the
transformer at 110°C. The lamp for thermal overload indicates the cutting
out by lighting yellow. The fuse cuts in the transformer when it has been
sufficiently cooled (normally approx. 20 min).
Tenupol-3 is protected against overload by an automatic fuse in the primary
side of the transformer. When overloaded, the signal button of the fuse
springs out. After 15-20 sec, when the fuse has become sufficiently cooled
off, the signal button can be reset and the instrument is ready for use again.
First, examine whether the fuse has been released by faults, which have to
be repaired before starting to use the instrument again.
The polishing circuit is secured against overload and short circuit with a 5 A
automatic fuse. The signal button is released in case of overload or short
circuit. After 15-20 seconds it can be reset. First, examine whether the fuse
has been released by faults, which have to be repaired before starting to
use the instrument again.
When the polishing is stopped, either by the IR-detector, or by the timer this
is marked by a built-in signal, which gives off a short audible warning signal
three times.
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