UT204 from company UNI-Trend is a near relative to the UT203. multimeter. Already UT203 provides a lot of user comfort and a very pleasant feature - measuring of a DC current without interrupting a measured circuit. However UT204 is different from its “weaker” brother in one essential thing - it enable measuring of a true RMS value of alternating signals (TRMS).
As we know, usual multimeters usually deploy a simple rectifier and an RC cell and they´re calibrated to show an effective value of AC voltage - supposing an ideally sinusoidal shape of a measured variable.
In many cases, a non-TRMS multimeter is fully sufficient, but still more frequently we meet devices, which by their power consumption significantly deform originally sinusoidal shape of a mains line voltage. A vast majority of new devices is equipped with switch-mode power supplies deforming a sinusoid, as they draw current for charging of input capacitors mainly on a top of a sinusoid. This situation is partially better at power supplies with a power factor correction (PFC), but even in these cases it´s never an ideal load. At any difference from an ideal sinusoid the accuracy of a common meter significantly drops down and the error can exceed tens of percents. Similar situation is also at various DC/AC inverters (for example 12VDC/230VAC), whose output is usually only an approximated sinus.
That´s why if exact measurement matters to us, it´s more certain to measure by a device equipped by a TRMS measurement. There are many types with this function on the market, and in a segment of clamp multimeters it´s for example the above mentioned UT204, which moreover offers a lot of other functionality for an excellent price.
Specifications |
Range |
Best Accuracy |
Model |
|
UT204 |
AC Current (A) |
40A/400A |
±(2.5%+5) |
DC Current (A) |
40A/400A |
±(2%+3) |
AC Voltage (V) |
4V/40V/400V/600V |
±(1%+5) |
DC Voltage (V) |
400mV/4V/40V/400V/600V |
±(0.8%+1) |
Resistance (Ω) |
400Ω/4KΩ/40KΩ/400KΩ/4MΩ/40MΩ |
±(1%+2) |
Frequency (Hz) |
10Hz~1MHz |
±(0.1%+3) |
Features |
Display Count |
|
3999 |
Auto Range |
|
√ |
Jaw Capacity |
|
28mm |
True RMS |
|
√ |
Duty Cycle |
0.1%~99.9% |
√ |
Diode |
|
√ |
Auto Power Off |
|
√ |
Continuity Buzzer |
|
√ |
Data Hold |
|
√ |
Relative Mode |
|
√ |
Setup |
|
√ |
Input Impedance for DCV |
Around 10MΩ |
√ |
General Characteristic |
Power |
9V Battery(6F22) |
LCD Size |
35.6X 18mm |
Product Color |
Red and Grey |
Product Net Weight |
260g |
Product Size |
208mm X 76mm X30 mm |
Standard Accessories |
Battery, Test Lead,Carrying Bag |
Standard Individual Packing |
Gift Box, English Manual |
|
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