The MR8740 and MR8741 are rack-mountable data acquisition systems that deliver high-speed, multi-channel measurements over maximum of 32 22 channels. The MR8990 DVM unit is a 2-channel input unit for the MR8740/MR8741 for measuring minute fluctuations in output from sensors in automobiles and other equipment and voltage fluctuations in devices such as batteries at high levels of precision and resolution.