Specifications Function：Ground resistance test, Loop resistance test Power Supply：6VDC 4 PCS of LR6 lkaline batteries Resistance Range:0.01-200Ω Resistance Resolution:0.001Ω Highest Resistance Accuracy:±1%±0.01Ω Data memory:99 Sets Alarm Threshold Setting Range:Resistance: 1-199Ω Alarm Sound and Light："Beep-beep-beep" alarm tone, Alarm Symbol Flashing, Press AL key to turn on, turn off Alarm or set Alarm Threshold. Interference Signal Recognition："Beep-beep-beep" tone, NOISE symbol blinking Working Temperature and Humidity：-20℃-55℃;20%RH-90%RH LCD Screen：4 Digits LCD display, Screen L×W: 47mm×28.5mm Clamp Size：Φ32mm Clamp Opening Extent：32mm Tester Weight：1120g (With batteries)(But battery not included in the package) Clamp Dimension：L×W×T: 260mm×90mm×66mm Protection Level：Dual Insulation Structural Feature：Clamp CT Shifting：Automatic shifting External magnetic field： External electrical field： Single measurement time：0.5 second Resistance measurement frequency：>1KHz Measured current frequency：50/60Hz Automatic measurement Low Battery Indication：Low battery symbol displays when battery is lower then 5.3V Memory Full Indication：MEM symbol blinks when all 99 sets memory is full Over Range Indication：Out of range indication "OLΩ", "L0.01" or "OL A" Auto Power-off：5 minutes after Boot up Power Consumption：Max 50mA either in booting up or normally working, Continuously working for 30 hours
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