Assembling Instructions; Operation - Velleman ET20 Bedienungsanleitung

1. Introduction
To all residents of the European Union
Important environmental information about this product
This symbol on the device or the package indicates that disposal of the device after its lifecycle could harm
the environment.
Do not dispose of the unit (or batteries) as unsorted municipal waste; it should be taken to a specialized
company for recycling.
This device should be returned to your distributor or to a local recycling service.
Respect the local environmental rules.
If in doubt, contact your local waste disposal authorities.
Thank you for buying the ET20! Read this manual carefully before bringing the device into service. Check first if you
have all the pieces: the air pump (1) & its tube, the heater (2) with thermostat and the tank, consisting of the tank
itself (3), 2 tank support pieces (4) & 3 fixation clips (5) & wires (6).

2. Assembling Instructions

First fill up the tank (3) with water to check for leaks.
1. One of the air inlets on the tank is sealed.
Connect the air pump (1) to the free air inlet by means of the plastic tube.
2. Fit the heater (order code ET200) (2) at the side opposite the air inlet. The
heater is preregulated and set for a temperature of approx. 32°C, the optimal
temperature for ferric chloride treatment. Carefully tighten the clamping screw.
3. Install the support pieces (4) in the tank's grooves.
4. The etching tank is now ready to be used.
3. Safety
You should only remove the heater in exceptional circumstances, as it is not without danger. The glass of the heater
may crack under the influence of the difference in temperature when the warm heater comes into contact with the
cold water. There is a genuine risk of electroshocks if this happens. Therefore, you should always unplug the device
and let the heater cool before removing it. You should also make sure that your hands are dry when you're
connecting or disconnecting the device. Take care to use this device with exactly 2 litres of etching solution.

4. Operation

The air pump always has to be placed higher than the liquid level in the tank to avoid flowback.
1. Fill the tank with the desired solution: 1 to 1.5 litres, depending on the size of the circuit board.
2. Turn the heater on and let it heat up for 2 minutes.
3. Put the plastic clips (5) on the printed board, and regulate the length of the fixation wires (6). Put the board in the
tank at about 1cm under the liquid line.
4. Turn the air pump (1) on for liquid agitation.
5. Monitor the evolution of the etching. This can be done by putting a lamp behind the tank; because the tank is
transparent, you can see what happens. At the correct temperature, this will take about 4 minutes.
6. When finished, wash away any trace of the product under running water.
7. Finally, inspect the tracks of your etched circuit.
For more info concerning this product, please visit our website www.velleman.eu.
The information in this manual is subject to change without prior notice.
ET20_v2
ET20 – VERTICAL ETCHING TANK
3 VELLEMAN