The Model 2G600 Degausser System Controller allows automatic degaussing of samples up to 2.5 kOe with a standard air-cooled solenoid. Other coil systems (water cooled) and power amplifiers can enable peak fields of up to 7.5 kOe. The 2G600 can be completely controlled by an external computer over an RS232 data link. When used with an automatic sample handler and a rock magnetometer measuring system, a complete sequence of measure and degauss cycles can be completed without removing the specimen from the holder.
Read MoreThe Model 2G600 Degausser System Controller provides for manual or computer-controlled sample degaussing. Computer control is implemented with a high-level command language over an RS232 data link.
The magnetic field amplitude is controlled by a 12-bit electronic antenuator. The antenuator is incremented at zero crossings with a user-controlled number (1, 2, 4, or 8) of full cycles between amplitude incrementation. This ensures that the samples are always subjected to an equal number of equal amplitude positive and negative cycles between antenuator incrementations. This antenuation technique, coupled with the use of very low-leakage and low-corona AC capacitors and a low-distortion power amplifier, greatly reduces the production of treatment-induced magnetizations.
Because the degaussing coils tend to heat up with use, it is necessary to measure and control the coil current to ensure that an accurate and precise peak magnetic field is achieved. The 2G600 Degausser System Controller measures the voltage drop across a small (0.25 ohm) precision resistor in series with the coil, which permits a magnetic field peak amplitude accuracy of 1%, even when very high fields (and therefore high coil heating) are used continuously.
