Operation - Amprobe AM-100 User Manual

4

4) OPERATION

DC Voltage, AC Voltage, & Hz Frequency functions
Note:
1) AC 400.0mV range selection is by RANGE button manually, and is specified from
AC 10mV (AC 40mV for True RMS models AM-105 & AM-110) and up.
2) DC 400.0mV range is designed with 1000MΩ high input impedance for least current
drain in measuring small signals, and can cope better with most commercially available
voltage output transducers and adapters. The non-zero display reading is normal when
the meter inputs are open circuit, which will not affect actual measurement accuracy.
Open input is actually a floating condition, which is not a zero-volt-input condition. The
meter will show zero or close to zero reading when the inputs are shorted.