Joulemeter, Low Voltage

This updated USB version of the low voltage Joulemeter includes datalogging and an improved specification and can be used with or without computer. Designed to be simple enough to use at KS3, and flexible enough for more advanced use at KS4 and beyond, the Joulemeter simply requires an input supply and load to be plugged in (e.g. solar panel and motor) and the meter will display the values of the power and the energy transferred. For simplicity, the instrument automatically adjusts the display to show suitable units and an appropriate number of decimal places, so that it can deal with a very wide range of values (e.g. for energy, from 100 nanojoules up to 1.75 megajoules).
This version of the Joulemeter functions almost identically to the previous version but in addition the meter also keeps a log at the chosen sample rate when the total energy transferred is being measured; the data can then be loaded on to PC using free mini-datalogger software. The function button allows any of four settings to be selected for the required quantity to be measured (energy and time; power; average power; voltage, current and power).

• Current range: ±7 (current can flow in either direction)
• Voltage range: ±25 V
• Log memory: 2500 samples
• Log sample period: 1, 2, or 4 seconds
• Powered via USB or using the 5 V mains adaptor (included)