| http://www.w3.org/ns/prov#value | - The bias control signals are sent via the high voltage board 1611, which has multiple channels of high voltage converters (transformers or HV DC-to-DC converters) for creating the voltages, such as 200 V or 2,500 V or 3,000 V (of either polarity), for operating the grain-attracting electrodes.
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