The Guralp CMG-DM24 Mk2 dataloggers have been manufactured with two output options having different bit weights:
As with all Guralp instruments, the manufacturer's calibration sheet for each serial number will list that instrument's most accurate bit weight. When updating a datalogger sensitivity using a nominal response, not only is it necessary to change the value in stage 3 (the A/D stage), but also to recalculate the stage 0 sensitivity that represents the product of all stage gains.
CMG-DM24 Mk2 with Single-ended Output
CMG-DM24 Mk2 with Differential Output
Mary Templeton 8/27/2010