Weller WST 20 Manual De Uso página 13

Undo the knives from the heater head once a week. There
are replacements (13) for the countersunk head bolts (11) in
the handle of the WST 20/82.
7. Operation
Always place the WST 20/82 in the safety stand when not
in use.
When using circular knives (e.g. universal knives), better
results are obtained by rotating the WST 20/82 around the
axis of the wire after closing.
Set the temperature just high enough such that the insu
lation in the area of the knife melts and can be removed.
Similar types of thermoplastic materials have widely
varying thermal behaviour. The molecular structure and
the additives used are dominant factors. It is therefore
necessary to determine temperature data by experiment.
The processing temperature (data sheets, data books) is
useful as a starting point.
Trouble Shooting
If the WST 20/82 heats unevenly or remains cold, the follo-
wing should be checked:
1. Temperature setting
2. Connection to control unit
3. The resistance at plug
Between pins 2 and 4 = approx. 22 Ohm
Between pins 1 and 2 = approx. 9 Ohm (WST 20)
Between pins 1 and 2 = approx. 7 Ohm (WST 82)
If other values are measured, the heater element is defecti-
ve.
Subject to technical alterations and amendments!
PK Elektronik Vertriebs GmbH, E-Mail: [email protected], Internet: www.pkelektronik.com
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