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3-1/2 Digit 19 Range Digital Multimeter with Transistor Test

Product Video
Overview
This digital multimeter is a compact, light tool - a bargain if you need something inexpensive and reliable.
Highlights
  • Perfect for any toolbox, glovebox, or test bench
  • Economical price
  • Includes 9V battery
  • Audible "beep" continuity
Part # 
390-500
Weight: 0.4 lbs.  
OUT OF STOCK
Due In: 11/20/2014
List Price$9.99
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$7.87
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Part # 390-500
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Product Details

3-1/2 Digit 19 Range Digital Multimeter with Transistor Test

This digital multimeter is a compact, light tool - a bargain if you need something inexpensive and reliable. The heart of the instrument is the ICL7106 IC coupled with a large 3-1/2 digit, 7 segment, 0.5" high LCD display with a maximum reading of 1999. Includes 9V battery. The unit can measure DCV (0.1mV - 1000V), ACV (0.1V - 750V), DCA (0.1mA - 10A), Ohm (0.1O - 2Mohm) diode forward voltage drop and hFE for bipolar PNP and NPN transistors.

Measurement specifications:


AC voltage measurement
  • Connect the red lead to "VOmA" jack and the black test lead to the "COM" jack.
  • Set the rotary switch at the desired V~ position.
  • Connect the test leads across the source or load being you want to measure and read the voltage value on the LCD display.

DC voltage measurement

  • Connect the red test lead to the "VOmA" jack and the black test lead to the "COM" jack.
  • Set the rotary switch at the desired position. If the voltage to be measured is not known, set the range switch at the highest range position and then reduce it until a satisfactory resolution is obtained.
  • Connect the test leads across the source or load being measured. Read the voltage value and polarity on the LCD display.

DC current measurement

  • Connect the red test lead to the "VOmA" jack and the black lead to the "COM" jack. For measuring currents between 200mA and 10A, insert the red lead into the "10A” (unfused) jack.
  • Set the rotary switch at desired position.
  • Open the circuit in which the current is to be measured, and connect test leads in series with the circuit.
  • Read the current value on the LCD display along with the polarity of red lead connection.

Resistance measurement

  • Connect the red test lead to "VOmA" jack and the black lead to "COM" jack. The polarity of red lead is positive "+" in this mode.
  • Set the rotary switch at desired range position.
  • Connect the test leads across the resistance to be measured and read the LCD display.
Note: If the resistor being measured is connected to a circuit, turn off power and discharge all capacitors before applying measurements!

Transistor Test

Before attempting to insert transistors into the socket for testing, always be sure that test leads have been disconnected from any measurement circuits. Also, components should not be connected to the hFE socket when making voltage measurements with the test leads!

  • Set the rotary switch to the "hFE" position.
  • Determine whether the transistor under testing is NPN or PNP type and locate the emitter, base and collector leads.
  • Insert the leads into the proper holes of the hFE socket on the front panel.
  • The multimeter will show the approximate hFE value at the condition of base current 10µA and a Vce of 3V.

Diode test

  • Connect the red test lead to "VOmA" jack and the black lead to the "COM" jack. The polarity of red lead is positive "+".
  • Set the rotary switch at the diode test position.
  • Connect the red lead to the anode of the diode to be tested and the black lead to the cathode of the diode.
  • The forward voltage drop of the diode will be displayed in mV. If the connection is reversed, only figure "1" should be displayed for a good diode.
  • Battery and fuse replacement

If the sign "BAT" appears on the LCD display, it indicates that the battery is old and should be replaced. Loosen the screws on the back cover and open the case. Replace the exhausted battery with a new one of the same type (9V 6F22 or NEDA 1604). To replace the fuse it's easy and should be replaced with a battery of the same ratings (F250mA/250V).

The unit has a wide operating temperature: -20°C to 75°C (32°F to 104°F) and a storage temperature of: -10°C to 50°C (10°F to 122°F). The accuracy is guaranteed to stay in the following limits for 1 year, when used at 23°C ±5°C, less than 75% relative humidity: AC voltage

Frequency range: 45 Hz to 450 Hz. Response: Average responding, calibrated in RMS of a sine wave. 
RangeResolutionAccuracy
200V100mV±1.2% of rdg ± 10 digits
750V1V±1.2% of rdg ± 10 digits
Note: some models have a maximum input voltage of only 600V AC with an overload protection of 600V DC or RMS AC for all ACV ranges. 

DC voltage

RangeResolutionAccuracy
200mV0.1mV±0.5% of rdg ± 2 digits
2000mV1mV±0.5% of rdg ± 2 digits
20V10mV±0.5% of rdg ± 2 digits
200V100mV±0.5% of rdg ± 2 digits
1000V1V±0.8% of rdg ± 2 digits
Input impedance: 1MO
Maximum input voltage: 1000V DC or 750V rms (200mV scale: 500V DC or 350V AC rms) Note: some models will have a maximum DC input voltage of only 600V with an overload protection of 250V RMS AC for the 200mV range and 600V DC or RMS AC for other ranges.

DC current

Overload protection: F250mA 250V fuse (10A range is unfused!).

RangeResolutionAccuracy
200µA0.1µA±1.0% of rdg ± 2 digits
2000µA1µA±1.0% of rdg ± 2 digits
20mA0.01mA±1.0% of rdg ± 2 digits
200mA0.1mA±1.5% of rdg ± 2 digits
10A10mA±3.0% of rdg ± 2 digits

Resistance

Maximum open circuit voltage: 3.2V
Overload protection: 250V rms. AC on all ranges.
RangeResolutionAccuracy
200O0.1O±0.8% of rdg ± 3 digits
2000O1O±0.8% of rdg ± 2 digits
20KO10O±0.8% of rdg ± 2 digits
200KO100O±0.8% of rdg ± 2 digits
2000KO1KO±1.0% of rdg ± 2 digits

Other specs

Diode aprox. testing voltage is 2.8V with a current of 1mA. The overload protection in the diode test mode is 250V RMS. AC.
Over range indication: figure "1" on the display.
Size: 126 × 70 × 25 mm
Weight: 170g


3-1/2 Digit 19 Range Digital Multimeter with Transistor Test
  • BrandParts Express
  • Part Number390-500
  • UPC844632089091
  • Product CategoryDigital Multimeters
  • Unit of MeasureEA
  • Product Rating
    (6 Reviews)
  • Weight0.4 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Reviews

3-1/2 Digit 19 Range Digital Multimeter with Transistor Test
3-1/2 Digit 19 Range Digital Multimeter with Transistor Test is rated 4.5 out of 5 by 6.
Rated 5 out of 5 by from Four Or MoreUnlike Steve, I should have bought four. I've used one up (worked it to death, my fault for being so rough) and have two in my two tool cabinets. I'm getting a fourth. I used to use an old RCA sooper dooper device. I can buy a dozen of these for what it would cost to replace that one, and electrons don't care what you're looking at them with.
Date published: 2013-08-22
Rated 4 out of 5 by from Ummmmm... ok not bad....Well its not the sharpest knife in the draw, but its ok. I don't know if i really want it though i got turned off a bit, i might get a replacement from parts, send this one back and spend a bit more and get a little better i guess :)That's what i think, anyway...
Date published: 2012-08-31
Rated 5 out of 5 by from Love this little meter!!This thing is great. I am into electronics repair and it is perfect for testing components on cirucut boards
Date published: 2012-04-16
Rated 4 out of 5 by from Small inexpensive and it worksIt is an inexpensive little meter that does the job. I can't imagine getting a better one at this price.
Date published: 2012-03-19
Rated 4 out of 5 by from great meter on the cheapI used this meter to find a bad diode in my guitar amp saved me lots of money to purchase new upgraded quality parts. kept me from taking the amp to a tech. well worth the money buy a couple keep one in the tool box and another in the glove box.
Date published: 2011-10-23
Rated 5 out of 5 by from Amazing value!This is a great meter. I just bought 4, i don't know what Ill do with the other 3 but I got a great deal!
Date published: 2010-11-13

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email tech@parts-expresss.com  for a prompt reply.
3-1/2 Digit 19 Range Digital Multimeter with Transistor Test

Where is this multimeter made?

Asked by: mraj
No surprise here: Made in China (The People's Republic of).
Answered by: notlance
Date published: 2012-08-30

Would this be good for biasing a rebuilt st-70 tube amp?

Asked by: 779888402
This multimeter should be just fine for biasing a tube amplifier.
Answered by: mikevv
Date published: 2011-04-05

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