Lightning Protection Standard Ground Resistance Tester Ground Reisistance Measuring Instrument with Accuracy 0.05% Temperature Coefficient ±25ppm

QIUSUO Lightning Protection Standard Ground Resistance Tester Ground Reisistance Measuring Instrument with Accuracy 0.05% Temperature Coefficient ±25ppm Technical Parameters Range and Accuracy: 0.001Ω; 2% 0.01Ω; 0.5% 0.1Ω; 0.2% 1.0Ω; 0.2% 10Ω; 0.05% 100Ω;0.05% 1KΩ; 0.05% 10KΩ; 0.05% 100KΩ; 0.05% Connection Wire Method:4-wire method Power:1/2W Temperature Coefficient:±25ppm Dimension:173mmX125mmX70mm Weight:360g Test Line:Red 0.5m & black 0.5m, each with 2pcs Working Temperature and Humidity:-10℃~40℃;80%rh below Storage Temperature and Humidity: -20℃~60℃;70%rh below Insulation Resistance:10MΩ above(between the circuit and shell 500V) Withstand Voltage: AC 3700V/rms(between the circuit and shell) Suitable Safety Standard: IEC61010-1,CAT Ⅲ 600V,Polluted Gradation

• Used for the calibration of grounding resistance tester, equipotential tester and other instruments
• Accuracy 0.05% Temperature Coefficient ±25ppm；Insulation Resistance:10MΩ above(between the circuit and shell 500V)
• Widely used in building quality inspection stations, supervision companies, building construction units, lightning protection companies, electric power departments and so on.
• Stable performance and rugged structure, calibration test is particularly convenient, accuracy of 0.05%, its resistance value including 1mΩ, 10mΩ, 100mΩ, 1Ω, 10Ω, 100Ω, 1KΩ, 100KΩ
• ETCR3900 standard resistor consists of nine 1/2W high-precision wirewound resistors, calibrating the resistance directly shift test, without the need to replace the test line.