DC Voltage: 200mV/2V/20V/200V ±0.5%, 600V ±0.8%
AC Voltage: 200V/600V ±1.2%
DC Current: 200?A/2mA/20mA ±1%, 200mA ±1.5%, 10A ±3%
Resistance: 200?/2K?/20K?/200K?/2M? ±0.8%
Display: LCD, 1999 counts
Fuse protection: F-200mA/250V
Operating Temperature: -0C to 40C
Overrange Indication: Only figure "1" on the display
Polarity Indication: "-" displayed for negative polarity
Low Battery Indication: - /+ display
Dimension: 138mm x 69mm x 31mm
Battery: 9V (Battery include)
1, the dc voltage measurement, such as batteries, walkman, power supply, etc.First put into the ".com "black pens and hole, red pens and into Ω" V ".Choose the knob to the bigger than estimate range (note: the value on the dial are maximum range, "V -" said dc voltage, "V ~" said ac voltage, "A" is the current file), then take pens and power supply or battery at both ends;Keep contact with stability.If a value can be read directly from the display screen, display as "1", indicates the range is too small, then increase the range before measurement.If appear in numerical left a "-", indicates pens and polarity, in contrast to the actual power polarity, red pens and pick up is negative at this time.
2, ac voltage measurement.Pens and jack and the dc voltage measurement, but should be a knob to exchange files "V ~" space range required.Ac voltage, plus or minus measurement method with the same.Both ac or dc voltage measurement, should pay attention to safety, don't touch pens and metal parts.
Second, the current measurement
1, the dc current measurement.First insert the black pens and "COM" hole.If the measurement is greater than the current of 200 ma, insert the red pens and "10 a" jack and the knob to dc "10 a file;If measured less than the current of 200 ma, then insert the red pens and 200 ma "" jack, will play to dc 200 ma knob within an appropriate range.After adjust, can be measured.String into the circuit, the multimeter to remain stable, reading.If shown as "1", then increase the range;If appear in numerical left a "-", indicates the current from the black pens and flow into the multimeter.
Alternating current measurement.Measurement method is the same as the one, but should play to ac gear, gear after the current measurements should be put back into the "V" Ω hole red pen, if you forget this step and measure voltage directly, ha ha!Your table or the power supply will be in "a wisp of smoke upper roller" - scrap!
Third, resistance measurements
Pens and will be inserted "COM" and "V" Ω hole, swirling the knob to the "Ω" in the required range, use pens and meet in metal parts, resistance measurement can contact resistance with the hand, but don't put his hand on both ends of the contact resistance at the same time, this will affect the measuring accuracy, the body is the resistance being very high but finite conductor.Keep pens and readings, and resistance with good contact;Note units: in "200" file when the unit is "Ω", in the 2 K to 200 K "file when the unit is Ω" K ", "2 M" is the unit of "M Ω".
Four, a measure of the diode
Digital multimeter to measure light emitting diode, rectifier diode...Measurement, position and voltage measurements, pens and screw knob to "- | > | --" (not painting the sign);With red pens and pick up the positive, of the diode black pens and the cathode, then displays the diode forward voltage drop.Schottky diode voltage is 0.2 V, ordinary silicon rectifier n4000 (1, 1 n5400 series, etc.) is about 0.7 V, light-emitting diodes (leds) is about 1.8 ~ 2.3 V.Pens and switch, the screen shows "1" is normal, because the diode reverse resistance being very high, otherwise the tube has been breakdown.
Five, the triode measurement
Pens and insert a ditto;The principle with diode.Just assume A foot to the base, with black pens and connect with the foot, red pens and contact with the other two feet respectively the other two feet;If two readings are around 0.7 V, and then A feet with the red pen, A black pen contact with the other two feet, if both show "1", then A foot to the base, or needs to be measured, and the pipe for the PNP.So the collector and emitter how to judge?Digital meter can't use the like pointer table pointer swing to determine, that how to do?Judge: we can use "hFE" gear gear first hit "hFE" file, you can see by the gear with a row of small aperture, divided into PNP and NPN transistors measurement.It has already been judged tube type, insert the base corresponding pipe type "b" hole, the other two feet respectively inserted into the "c", "e" hole, can read numerical, namely beta;Switch to a fixed base, the rest two feet;Comparing the two reading, reading a larger pin position and surface "c", "e".
1 x Digital Multimeter
1 x Instruction Manual in English
1 x set of test leads
1 x 9V Battery