digital multimeter การใช้

• In 1974, Radionics launched the DM1 digital multimeter.
• He did use an oscilloscope to test some equipment, and used a digital multimeter quite often.
• I find that the leads of my digital multimeter have about . 2 ohms resistance, for example.
• With a typical ohmmeter or digital multimeter, it may take a long length of very fine wire to get clear results.
• An autoranging digital multimeter can automatically adjust the scaling network so the measurement circuits use the full precision of the A / D converter.
• Isolation resistance measurements may be achieved using a high input impedance ohmmeter, digital multimeter ( DMM ) or current-limited Hipot test instrument.
• I measured the filament cold resistance ( 300 K, ie a room temperature of 27 C ) carefully with a digital multimeter, compensating for lead resistance.
• For resistance measurements, usually a small constant current is passed through the device under test and the digital multimeter reads the resultant voltage drop; this eliminates the scale compression found in analog meters, but requires a source of precise current.
• Inheriting the ROM capsules from the Epson PX-8 Geneva, it added a cartridge bay ( similar but incompatible with the Epson HX-20 ), for which Epson offered several printers, micro-cassette drive, modem, EPROM writer, DMM ( Digital Multimeter Module ), RAM and ROM cartridges.