Tag Archives: multimeter
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.
UT61D handles high and also extra low voltages – [Link]
We are used to seeing oscilloscopes with built-in features such as function generators, DVMs and spectrum analysers but now Keithley have switched the tables and produced a DVM or ‘Graphical Sampling Multimeter’ with a built-in waveform capture/display feature. The DMM7510 has a 5 inch capacitive touchscreen interface displaying measurements to 7½ digit accuracy and a waveform capture capability of 1Msample/s using an 18-bit digitiser.
According to the data sheet the DMM7510 features a low noise input stage with a 32-bit A/D converter giving the instrument DC accuracies that are typically only available with metrology-grade instruments. The instrument has good sensitivity featuring 100 mV, 10 ohm and 10 microamp full scale measurement ranges.
The meter also includes measuring ranges for capacitance, ACV and ACI, temperature (RTD, thermistor and thermo-couple), 2- and 4-wire resistance, dry circuit ohms, period, frequency, diode test and DC voltage ratio. In addition to the touch screen GUI the DMM7510 includes a USB 2.0 port to store test results and screen images, a HELP key, a rotary navigation/control knob and a front/rear input selector button. The front panel buttons are backlit and Keithley include their Test Script Processor system and SCPI programming mode. This allows test scripts to be run directly on the instrument without the need for an external PC.
Keithley 7½ digit touch screen DVM – [Link]
by Martin Rowe @ edn.com:
The DMM (digital multimeter) is a basic measurement tool for nearly every electrical engineer and many other engineers. With the push to constantly improve power efficiency in electronic designs comes a need to not only measure voltage and current, but to dynamically see them as well. Keithey’s DMM7510 combines a 7½-digit DMM with an 18-bit, 1 Msample/s digitizer, which lets you see measurements both numerically and graphically.
Having the ability to see waveforms lets you uncover problems that used to require an oscilloscope. The DMM7510 also features a 5-in. capacitive touch screen. You can use gestures such as swipes and pinches to sweep though setup menus or zoom in or out of waveforms. I tried it firsthand just prior to today’s product launch, as the short video below shows.
DMM provides numerical and graphical displays – [Link]
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
Energy is transmitted in different ways and one of these ways is electricity. It can appear in many forms and through various phenomena such as lightening or electromagnetic induction, and can be used in transport, electrical appliances, and in the residential and industrial sector, to name but a few examples. Physical magnitudes are derived from electricity such as the electric field, current, and electric potential. The latter two are measured in amps and volts respectively.
In order to measure the previous magnitudes and many others, ingenious devices have been developed, called multimeters, which are the perfect example of the high integrity and versatility of the most modern measuring instruments. They are powerful devices, small in size, but large in their ability to detect and solve electrical failures, measure a large variety of parameters such as current, voltage, capacity, resistance, and they are also equipped with additional functions which allow them to measure temperature, continuity, frequency, carry out diode tests or perform as an oscilloscope. Many multimeters have a USB port and have wireless transfer capacity (Bluetooth), which means that the measurement results can be sent to a PC or computer for later analysis. In addition, many of them are designed in such a way that their screen is removable, so that they can operate in difficult to access areas. Continue reading Introduction to multimeters