AlphaLab AC Electric Field Meter

This meter measures the AC electric field in the vertical direction (same as the axis of the meter). It has a wide frequency range (40 Hz-20 KHz) and high accuracy (reading +\/-2% reading +\/-1 count),an electric field strength range of 19 999 V\/m,and a resolution of 1 V\/ m. The sensor is located at m. To operate,turn on the meter (sliding switch on the right). Point at the electric field source and read the display in volts per meter (equivalent RMS). The instrument uses an advanced AC detection circuit,which is more accurate and faster than the existing AC detection circuit,especially under high frequency and weak field strength. Accuracy at absolute values 40 Hz-20 KHz is +\/-2% of reading (1 count is 1 volt per meter,or V\/m). Reading be completed in one second,regardless of how much the field changes. For frequencies up to 50 KHz,the accuracy is still +/-2%,but the last digit will read 2 counts lower at 25 KHz and 4 counts lower at 50 KHz. At 100 KHz,the meter reads 5% low,9 counts low. For example,if the magnetic field is 5 V\/m at 10 KHz,the meter will correctly read 005. At 25 KHz (which is 5 V\/m) the energy meter reads 003 (2 counts low),but for a strong magnetic field like 1000 V/m at 25 KHz the energy meter reads 980 to 1020 V /m,minus 002,that is,978 to 1018 V/m. This energy meter has a one-year warranty and includes a standard 9-volt battery. When you see the battery is low,slide the back panel (lower half of the meter) down to replace the battery. Typical battery life is 20 hours.