Instruction Manual

15
38 ma at 24V -- or 70 ma at 12 volts with display unit, LCD backlight on “high” (just after pushing
buttons)
Cable considerations from input unit to readout control unit or computer
interface.
When runs exceed 50-100 feet, twisted pair cable (such as cat 5) should be used. Wire
resistance for each of 4 wire cable should not exceed 30 ohms from one end to the other for the
PentaMetric readout/control unit. This allows 1000 feet of length if AWG22 wire size or larger is used
or #24 for up to 600 ft. The connections to the computer interface should allow even longer distances.
When twisted pair cable is used one pair should be used for the terminals marked 3 and 4 (that carry
digital communication data). Another pair can be used for + and – (which supply power).