The LH Series of instruments is the most comprehensive range of clamp meters available which conform to CE requirements for safety and electromagnetic compatibility. From the low cost pocket size LH 1010 through to the LH 2040 which has True RMS AC and DC current measurement capability up to 2000 A and analog outputs for use with oscilloscopes and recorders.

In addition to AC/DC capability, the use of Hall Effect ensures accurate low frequency and high current measurements are possible in a compact instrument design. Maximum overload currents are much higher than for conventional current transformer designs improving safety and reliability. The LH 1010 and LH 2015 meet the requirements for AC/DC current only applications. 

True RMS for reliable measurement
Modern multimeters basically use 3 types of measuring methods: Mean value, peak value and true RMS measuring. When measuring pure DC or sinusoidal AC, clamp-on multimeters using the different methods show equivilent results. However in the case of ripple currents or even complex distorted currents typically found in power converters, PWM frequency inverters and mains supply circuits, the mean and peak value techniques ca result in substantial errors. In these common applications only the true RMS measurement technique employed in most Fluke clamp-on instruments provide reliable readings. When measuring AC according to the peak value measuring method the peak value is measured and multiplied by a 0.707 correction factor while the mean value is multiplied by a 1.111 form factor. Neither give accurate results for non-sinusoidal waveforms.

Optional Software
WinLog is an easy to use PC software and interface package for data logging applications with the Fluke Power Clamps and HEME ISO Series insulation testers. The software can be used to continually log the electrical measurement displayed on the instrument or to download stored data from the Analyst and ISO2000 to a PC for further analysis. 

• Easy to use Windows format allowing the display of multiple parameters in instrument mimic, table and chart formats.
• Simultaneous logging of multiple parameters
• Waveform and stored data download from the Analyst
• Harmonics analysis of waveforms with the Analyst and LH1060 Simple data export to other applications