Weller WHA900 - Manual (Page 5)

English
3
4. Operating guidelines
Changing the nozzles;
The hot air nozzles are fixed to the heating ele-
ment with a set/attachment screw. Loosen the
set/attachment screw to remove nozzles.
5. Accessories
For Nozzle range see “ Hot Air Nozzles “.
0051504899 - Multiple Rest for six nozzles.
0051504999 - Nozzle Exchange Tool
2.5 mm Hex Wrench
6. Packing List
WHA900 Control Unit
Power Cord
Safety Rest
( 1 ) Set / Attachment Screw
Operating Instructions
Safety Information
Subject to technical change without notice!
Temperature Offset
1. With the WHA900 off and the heater cooled down. Place Measuring Nozzle ( 0058736875 ) on to the
end of the Hot Air Pencil and fasten it with the set screw.
2. Insert the 0.5mm Type “K” Thermocouple, ( 0058736786 ) into the hole of the Measuring Nozzle and
place the Hot Air Pencil in the safety rest. Switch the device on.
3. Choose the temperature you want to adjust with the temperature knob.
4. Activate the unit with the Start / Stop push button. Set the Airflow Knob to 4. Wait approximately 5
minutes before continuing.
5. Read the temperature value indicated on the measuring instrument.
6. If the temperature has to be corrected, depress and hold the Start / Stop push button for approximate-
ly 15 seconds while the hot air is activated. The green LED (1) will light continuosly.
7. While the green LED (1) is continuosly lit, immediately turn the temperature knob slightly beyond cen-
ter and rotate back to the center position (550 °F). This will be your “zero” point for adjustments. Rotate
clockwise for positive and counterclockwise for negative adjustments.
8 Adjust the temperature knob until the desired setting is indicated on the measuring device and has
stabilized. Depress the Start / Stop push button to confirm.
9. The Temperature Offset function is now complete. You may adjust the temperature knob to your origi-
nal setting.
10. Repeat steps 3-9 if additional Offset is required.
The Airflow and Temperature are activated after
depressing the Start/Stop Push Button. Heat-up
time of the nozzle depends primarily on the size
of the nozzle and the air flow. Warning: Do not direct the hot air pencil at
people or inflammable objects.