How do you clean CM2000 electrodes after use?
Preparing a technical colloidal dispersion involves more than choosing a generator setting. The vessel, water and condition of the electrodes also matter before the next run. Deposits can form on electrodes, and the CM2000 has a protection function that pauses the process if dendrites develop.
This guide gives CM2000 users a practical routine: what to check before starting, what to do when the process pauses, and when replacement makes more sense than further cleaning.
1. Before starting: three useful checks
- Vessel: use a clean vessel without residue from a previous run. Clean it before switching from one electrode metal to another. Keeping a separate vessel for each metal is a practical way to reduce the chance of transferring residue.
- Electrodes: check that the pair matches the CM2000 and the selected material. EA sells a purpose-made 99.99% silver pair measuring 2 × 80 mm. Replace electrodes that have become markedly thin or mechanically damaged.
- Water: for silver, choose water intended for the process. EA’s Aquaionic water is sold for technical use with the CM2000. Its stated conductivity of approximately 2 µS/cm applies when the bottle is filled; it is not a guarantee of every later reading.
The manufacturer’s manual uses 250 ml as an initial volume setting. A one-litre bottle would therefore cover four 250 ml runs in theory, before allowing for any water lost during pouring or cleaning. This is a volume calculation, not a promise about yield or dispersion quality.
2. Fit the electrodes without wetting the sockets
The CM2000 electrodes must sit properly in their holders. The manual specifies an insertion depth of about 8 mm and a gap of about 5–10 mm between the water surface and the electrode sockets. Do not immerse the sockets. Let the device complete its self-test before lowering the electrodes into the water.
Work on a dry, non-conductive surface. Do not touch active electrodes with wet hands, and use the original power supply. The generator is intended for technical preparation of dispersions; this article does not provide medical-use instructions.
3. What if the CM2000 reports dendrites?
According to the manufacturer’s instructions, the CM2000 enters PAUSE mode if dendrites develop during a run. Carefully lift the electrodes from the water, gently wipe the deposit away with kitchen paper, return the electrodes to the water and press OK to continue. Follow the display and the sequence in your own device manual.
If the warning appears as production begins, the manufacturer identifies excessive water conductivity as a possible cause and advises using different water. Further polishing alone will not address that cause. Nor should the CM2000’s displayed value be treated as a laboratory measurement of a pre-existing concentration: the device calculates a value during production; it cannot measure the metal content of a purchased or previously prepared dispersion.
4. Clean and store the electrodes after a run
- When the run ends, disconnect the power and remove the electrodes from the device as instructed in the manual.
- Remove deposits gently. EA offers a metal-free electrode cleaning fleece for dry or wet use. Apply light pressure; avoid aggressive abrasion.
- If you clean the electrodes with water, wipe and dry them thoroughly afterwards. Clean the vessel before making the next batch.
- Store electrodes of different metals separately and label them. This is a practical organisational recommendation that makes it easier to select the correct pair next time.
When is cleaning no longer enough?
Slight discoloration alone does not prove that an electrode is unusable. But if it is visibly thin, bent, cracked or at risk of breaking, consider replacing it. The dedicated 2 × 80 mm silver electrode pair for the CM2000 is a replacement part. Do not choose electrodes for another generator by appearance alone: check the connector and stated compatibility.
Frequently asked questions
Does cleaning fleece guarantee a particular concentration?
No. It helps care for the electrode surface; concentration and dispersion composition are separate questions.
Can I use tap water?
For preparation with silver electrodes, follow the CM2000 instructions and use suitable distilled or purpose-made deionized water. EA advises against tap and mineral water for its CM2000.
Is the “ppm” value on the display a laboratory-confirmed composition?
No. The manual explains that the CM2000 calculates the value from the electrolysis process and cannot measure a concentration already present in another dispersion.
EA equipment covered in this guide
- Colloidmaster CM2000 — the device and workflow discussed here.
- Cleaning fleece FLIS — care of the electrode surface.
- Silver electrodes 39031 — dedicated 2 × 80 mm replacement pair.
- Aquaionic 1 L, 39047 — water for technical preparation with the CM2000.
For the next run: prepare a clean vessel, the correct pair of dry electrodes and suitable water. If a warning appears, check the device message and manual first. Afterwards, clean the electrodes gently, dry them and store different metals separately.
