Wednesday, December 14, 2011

HIGH IMPEDANCE DIGITAL VOLTMETER (for use in Expt 17 Physics STPM)



Technical Specifications

Input Impedance                  10MΩ
Frequency Response            100 Hz to 30 kHz
Max. voltage measurements  20v a.c/d.c
Resolution                             10mV
Power input                           240v a.c

Many cheap digital multimeters have a low input impedance and give poor results when small a.c voltages are measured as in part 2 of experiment 17.

This digital voltmeter with a high impedance of 10 MΩ is designed to meet the requirements of both part 1 and part 2 of experiment 17.