Equipotential Bonding - Weller WMD 1S Operating Instructions Manual

English
pre-selected temperature has been reached. The tempera-
ture display (2) indicates the actual value. The built-in
pump is started using a microswitch that is integrated in
the handle.
The supply unit uses a pressure gauge (5) to display the
vacuum. The degree of contamination of the filter cartridge
(9) is displayed here.
Attention: The pump motor is fitted with a ventilator to
ensure that the instrument remains cool. There must be
sufficient air supply for this ventilator.
Setting the temperature
In general the digital display (2) shows the actual tempera-
ture. By pressing the „UP" or „DOWN" button (4) (7), the
display (2) switches to the set value. This value can then be
increased or decreased by pressing the „UP" or „DOWN"
button (4) (7) respectively. If the button is continuously
pressed, the adjustment is fast. Approx. 2 sec. after
releasing the button, the display (2) automatically switches
back to showing the actual temperature. Dependent on the
system, when using the hot-air pencil only the set value is
displayed.
Air-setting
By permanently pressing the „AIR" button (8) the display
switches to air-volume. The air throughput can then be
altered gradually from 1 l/min-10 l/min by pressing the
„UP" or
„DOWN" buttons (4) (7). If the buttons are continuously
pressed, the adjustment is fast.
Offset / Setback Adjustment (Temperature
Compensation / Temperature Reduction)
Switch off unit. Keep „UP" button pressed during switch on
until the self-test has been completed. Release button. The
offset value currently set appears on the display to the right
of the digital point. When the „AIR" button is pressed the
display to the left of the digital point changes to the setback
value. These values can be changed using the „UP" or
„DOWN" button.
To save the value set, keep the „AIR" button pressed until
the display flashes.
Maintenance
When using the hot-air pencil:
Contaminated filters influence the air throughput of the
pump. Therefore the main filters for „VACUUM" (9) and
„AIR" (10) should be inspected regularly and changed when
necessary. To do this, unscrew the filter cover, remove the
contaminated filter and replace with a new original Weller
filter cartridge. Make sure that the filter-cover seal is cor-
rectly in place, insert the compression spring, and screw
the filter cover back on firmly.
15
When using the desolder:
Desoldering bit, heating element and sensor make up a sin-
gle unit which is highly efficient. The desolderer should be
cleaned regularly. This involves emptying the solder collec-
tor, changing the glass tube filter and checking the seals. A
perfect seal of the face of the glass cylinder gives full sec-
tion power. Contaminated filters influence the air through-
put of the pump. Therefore the main filters for „VACUUM"
(9) and „AIR" (10) should be inspected regularly and chan-
ged when necessary. To do this, unscrew the filter cover,
remove the contaminated filter and replace with a new ori-
ginal Weller filter cartridge. Make sure that the filter cover
seal is correctly in place, insert the compression spring,
and screw the filter cover back on firmly. The „VACUUM"
filter removes flux vapours from the extracted air and must
therefore be regularly inspected.
Attention: Working without the filter destroys the vacu-
um pump.
Use the cleaning tool (005 13 500 99) to clean the suction
nozzle opening and the suction tube.
The suction nozzles can be replaced quickly and easily with
a short turning movement (approx. 45°). Large deposits in
the area of the cone will prevent the insertion of a new suc-
tion nozzle. Deposits can be removed with the cleaning
insert for the heating element cone.
Figures of the cleaning tools, cleaning procedure and
exchange of the suction nozzles see page 65.

4. Equipotential bonding

The various circuit elements of the 3,5 mm jack bush make
4 variations possible:
Hard-grounded:
No plug (delivery form)
Equipotential bonding:
With plug, equalizer at center contact (impedance 0 ohms)
Potential free:
With plug
Soft-grounded:
With plug and soldered resistance. Grounding with set resi-
stance value.