Tag Archives: multimeter

Siglent SDM3055 5.5 Digit Bench Multimeter Review

SIGLENT’s SDM3055 series is a dual display digital desktop multimeter. The SDM3055 provides a rich and powerful feature set at an excellent price. This DMM family is well suited for production testing, R&D and certification work, as well as any place where an accurate and powerful full-function DMM is needed. In the SDM3055’s design and layout, great emphasis was given on both front-panel and computer-based control of the instrument. Equipped with a 4.3 inch TFT-LCD true color LCD screen, its display resolution is up to 480 * 272. It can not only display numerical readings, but also supports histograms, trend charts, bar charts and statistics, in addition to the built-in arithmetic functions. Even when using the front-panel menu, the user can display the most important analysis results of the accumulation of time and data. This eliminates the process of drawing and statistics, and the measurement is accurate and reliable. The SIGLENT SDM3055 has a powerful testing engine, measuring speed up to 150rdgs / s, 1Gb Nand total memory capacity, mass storage instrument settings, historical data, and external U disk external storage. The SDM3055 interfaces include USB Device, USB Host, LAN and GPIB (SDM3055A). It can support VXI11, USBTMC remote control as well as interconnection with National Instruments’ LabVIEW. A SCPI command programming manual is also provided in support of remote control operation programming.It is compatible with mainstream multimeter command sets and uses the compatible language with SCPI for transmission and control.

Siglent SDM3055 5.5 Digit Bench Multimeter Review – [Link]

UT602 – for those who are interested in miliOhms


We have for you a measuring device able to measure even small resistance with 0.01 Ohm resolution.

UT602 is exactly that device, which you may have missed at development of devices operating with higher currents, where every resistance (lead, connector, joint,…) acts negatively, as well in applications using small resistors (shunts for current measuring and similar).

UT602 might be easily classified as a common multimeter if not having one useful measuring range marked as „20 Ohm“. The device is able to measure with 10 miliOhm in this range. Naturally, a measured value also depends on resistance of testing leads but in praxis it´s always possible to find out this added inaccuracy by their connection to each other before measurement.

Inductors also belong to components frequently used in devices using high currents (switch-mode power supplies, filters,….), that´s why a possibility to measure inductance (with 1uH resolution) is certainly valuable feature. Diode and transistor testing as well as continuity tester (buzzer) are “extra bonus”.

Detailed description will provide you the UT602 user guide. UT602 is our stable stock item.

UT602 – for those who are interested in miliOhms – [Link]

UT204 is able to measure DC current and also True RMS


Clamp multimeter UT204 measures reliably even in real conditions of nowadays mains supplies and for an affordable price moreover.

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.

Detailed information and comparison of UT203/ UT204 will provide you the UT204 datasheet and the UT204 datasheet and UT203-204 user guide. We keep Uni Trend UT204 as a standard – immediately available item.

UT204 is able to measure DC current and also True RMS – [Link]

Siglent SDM3055A (SDM3055) 5.5-Digit Multimeter Review, Teardown & Experiments

In this episode Shahriar reviews the Siglent SDM3055A (SDM3055) 5.5-Digit Multimeter. After a brief look at the instrument’s datasheet, a full teardown is presented. The instrument utilizes a two-board design and a large LCD screen. The SDM3055A provides a comprehensive set of measurements including capacitance as well as various graphing capabilities including histogram, trend and bar graphs. USB and LAN connections are standard and a USB-GPIB can also be purchased. The performance of the instrument is verified through experiments with various functions and setups.

Siglent SDM3055A (SDM3055) 5.5-Digit Multimeter Review, Teardown & Experiments – [Link]

UT61D handles high and also extra low voltages


That´s why this modern multimeter is also suitable development of sensitive and “ultra low power“ devices.

Wide offer of modern measuring equipment enables us to choose a suitable device for every purpose and in various price levels. A decision which device to buy and/or a decision whether it´s worth to go for a higher-level device surely isn´t easy.

UT61D, which we want to introduce to you this time offers all usual features – at the first sight. But when we go deeper, we find out that besides a pleasant resolution (5999) and a decent precision (0,5-0,8%) it also offers 60mV ranges – for DC and also AC. Especially in the AC field it´s not that common (at equipment of thice price-level) and moreover – all that we measure in the AC signals can be labeled as TRMS (true RMS). And to all this, also measuring of current starts with a 600uA range (DC aj AC), what means measuring with a 0,1uA resolution.

Probably the last main bonus of UT61D is a possibility of communication with PC via serial port (RS232) and displaying of measured parameters in a simple graphic software.

Detailed information will provide you the UT61D user guide as well as UT61 family flyer.

UT61D handles high and also extra low voltages – [Link]