Power analyser checks out switch-mode supply performance
The IT9121 power analyser can measure voltage, current, power, frequency, harmonics and other parameters. In use it is typically placed between mains (line) input (via a stabilisation network if required) and the power supply under test. It has a maximum rated input of 600 Vrms and 20 Arms with measurement bandwidth of 100 kHz. The basic voltage and current accuracy is 0.1%. The standard configuration includes USB, GPIB, RS232 and LAN communication interfaces in addition to interfaces for USB-based peripheral devices. Users can save the measured parameters via an external storage medium.
The IT9121 power meter can measure all AC and DC parameters, including the active power, reactive power, apparent power, power factor, voltage, current, frequency, phase difference, etc. It also has a bandwidth of 100 kHz, which can realise high-speed harmonic measurement within a wider dynamic range. In addition, the IT9121 can be used for measurement of multiple harmonics – 50 harmonics of the fundamental frequency can be measured.
A special 5 mA range makes direct testing in accordance with EN50564 possible, without the need for an external transducer – a suitable option for the power test of high-power electrical household appliances.
Aspen Electronics [in the UK]; www.aspen-electronics.com
Alternative distribution details from Itech; www.itechate.com
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