Equipotential Bonding - Weller WMD 1S Manual De Uso

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display (3) illuminates. This dot is used as visual check on the
regulation. Continuous illumination signifies that the system
is warming up. Flashing signals that the pre-selected tempe-
rature has been reached. The temperature display (2) indica-
tes the actual value.
The built-in pump is started using a microswitch that is inte-
grated 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 temperatu-
re. 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 pres-
sed, the adjustment is fast. Approx. 2 sec. after releasing the
button, the display (2) automatically switches back to sho-
wing 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 alte-
red gradually from 1 l/min-10 l/min by pressing the „UP" or
„DOWN" buttons (4) (7). If the buttons are continuously pres-
sed, the adjustment is fast.
Offset / Setback
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 neces-
sary. To do this, unscrew the filter cover, remove the conta-
minated filter and replace with a new original Weller filter
cartridge. Make sure that the filter-cover seal is correctly in
17
PK Elektronik Vertriebs GmbH, E-Mail: info@pkelektronik.com, Internet: www.pkelektronik.com
Adjustment (Temperature
place, insert the compression spring, and screw the filter
cover back on firmly.
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 collector,
changing the glass tube filter and checking the seals. A per-
fect seal of the face of the glass cylinder gives full section
power. 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 fil-
ter 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 regu-
larly 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 71.

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.