Competitive-price Digital Volt Ohm Meter
Ohm Testing with an Auto-ranging Digital Multimeter
Explanation of a digital multimeter
A digital multimeter is a versatile instrument that allows for the measurement of multiple electrical quantities using a single device. It utilizes digital and logic technology to perform various tests and functions. By combining the capabilities of voltmeters, ammeters, ohmmeters, capacitance meters, frequency meters, and thermometers, a digital multimeter can replace the need for several individual meters.
It consists of four main parts: a display screen, a selection knob, input jacks, and test leads.
The digital multimeter's display screen presents the measured values in numeric form along with symbols. Some models feature a backlit LCD screen to enhance visibility in dark environments. The display screen also provides information on the unit of measurement, polarity of voltage or current, measurement range, operational mode, and any error or warning messages.
The selection knob allows users to choose the specific quantity they want to measure or test. It also permits switching between manual and auto-ranging modes. In manual ranging mode, users manually select the appropriate measurement range, whereas auto-ranging mode automatically adjusts the range based on the input signal.
The input jacks serve as connection points for the test leads. Test leads are insulated, flexible wires with probe tips that establish a connection between the digital multimeter and the circuit or component being tested. Typically, the red probe connects to the positive terminal, while the black probe connects to the negative or common terminal. The input jacks are labeled according to their functions and capabilities. For instance, the mAVΩ jack handles voltage (V), current (mA), and resistance (Ω) measurements, while the 10A jack is designed for high current (A) measurements. The COM jack serves as the common or ground connection for all measurements.
The test leads are color-coded to indicate polarity, with red representing positive and black representing negative. They come with various types of probe tips suitable for different applications. For example, alligator clips provide secure attachment to wires or terminals, while needle probes are designed for piercing insulation or accessing tight spaces.
Attribute(s)
| Basic Functions |
Range |
Accuracy |
| Model |
|
UT61E |
| DC Voltage(V) |
220mV/2.2V/22V/220V/1000V |
±(0.1%+2) |
| AC Voltage(V) |
220mV/2.2V/22V/220V/750V |
±(0.8%+10) |
| Direct current(A) |
200uA/2200uA/22mA/220mA/2.2A/10A |
±(0.5%+10) |
| Alternating current(A) |
200uA/2200uA/22mA/220mA/2.2A/10A |
±(0.8%+10) |
| Resistance(Ω) |
220Ω/2.2kΩ/22kΩ/220kΩ/2.2MΩ/22MΩ/220MΩ |
±(0.5%+10) |
| Capacitance(F) |
22nF/220nF/2.2uF/22uF/220uF/2.2mF/22mF/220mF |
±(3.0%+5) |
| Frequency(Hz) |
10Hz-220MHz |
±(0.01%+5) |
| Special Function |
| Maximum display |
|
22000 |
| Auto range |
|
√ |
| True RMS |
|
√ |
| Frequency Response(Hz) |
|
45Hz-10KHz |
| Duty Cycle |
0.1%-99.9% |
√ |
| Diode Test |
|
√ |
| Buzzer |
|
√ |
| Low Voltage Display |
≤7.5V |
√ |
| Digital Hold |
|
√ |
| Relative Measurement |
|
√ |
| Peak |
|
√ |
| RS-232 Data Transfer |
|
√ |
| Analog strip |
|
46 |
| Input Protection |
|
√ |
| Input impedance |
≥10MΩ |
√ |
Application Scenarios
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