BioSemi.nl

Coen wrote: > A continuous blue light means that all electrodes in the water are > functioning properly. Ok, I think this statement is not 100% correct acording to my tests, since a continuous blue light is achieved by simply immersing the CMS and the DRL electrodes in the salt water, without any ot...

We have done the ONE bucket test to our electrodes and the results came as described below: 1. When we put both the CMS and DRL (only) electrodes in the water the blue light will came on consistently. 2. Maintaining CMS +DRL in the water, once we add any other active electrode the blue light STAYS o...

The odd harmonics presence is due to the fact that your electrical company is not providng you with a pure 50Hz sinusoide: it is, in some way, distorted by power transformers and other power devices in its way to the consumer . This is generally the case, electrical companies are not suposed to deli...

[quote]With the ActiveTwo system, it is not possible to pickup 50 Hz interference inside a properly shielded mu-metal room (provided the electrodes, AD-box and battery are inside the room, and the USB-receiver with PC are outside the room). Whether the electrodes are active or passive plays no role ...

Our shielded room is professional (it is not a Faraday cage, which is other thing, a term mis-used in this context) it is a room with thick mu-metal walls with no 50 Hz power inside, everything running on bateries. If the Active2 Biosemi system still picks up 50Hz noise in such a "high noise sterile...

Granted there there must exist some degree of 50Hz noise in the shielded room but, what about the biosemi statement: e: "ActiveTwo system, the effect of interference currents in the electrode wires is practically eliminated by using active electrodes". Isn´t the ActiveTwo suposed to reduced this 50H...

I am bringing this issue to the hardware thread were I think it should be. We are currently testing two well known acquisition systems for the biomedical signals (high-resolution). One of the systems is the Biosemi active 2. We have tested this system in a salt water solution as described in the Bio...