The ZF8000 8 Channel Recorder gives crisp, definite tracings with an accuracy to within 0.5%. The channels are 40 mm wide. The galvanometer system is a closed loop position feedback servo system. Frequency response is flat within 1 dB to 40Hz. Sensitivity is 0.5V full scale. Chart speeds are microprocessor controlled from 1 mm/hr to 250 mm/sec