Detail CONSTANT 250ER Earth Resistance Tester
CONSTANT 250ER Earth Resistance Tester
Features
• Power measurement of 3-phase 3-wire circuit, 3-phase 4-wire circuit and single phase circuit
• Measure V, A, W, VA, VAR, kWh, Power Factor ( Cos j) , and Hz
• Double scales analogue bar graph to display voltage & current fluctuation
• Minimum current of Active Energy measurements is 5A, measure expanding
energy per hour of general electrical equipment. Measure and display 5 parameters
of power of each phase : Active Power, Apparent Power, Power Factor, Reactive Power,
Active Energy, and Total Power value in 3-phase measurement mode respectively
• Double lines display 2 parameters on each menu, store 28 groups of measurement parameter
• Display measurement time and select tested voltage signal at one time in Active Energy measurement mode for long measurement
• Portable, light and easy to carry
• External power supply for long time active energy measurement
• Maximum/ minimum value measurement
• ” OL” for input voltage exceeds 600V, current exceeds 1000A, active power exceeds 600kW
• Low battery indication
Function
Resistance
Range - Resistance : 0.01 ~ 0.999© - 0.001©
1 ~ 9.99© - 0.01©
10 ~ 99.9© - 0.1©
100 ~ 199.9© - 1©
200 ~ 400© - 5©
400 ~ 600© - 10©
600 ~ 1200© - 20©
Accuracy : ± ( 1.5% rdg + 0.01© )
± ( 1.5% rdg + 0.1© )
± ( 2.0% rdg + 0.3© )
± ( 3.0% rdg + 1© )
± ( 6.0% rdg + 5© )
± ( 10% rdg + 10© )
± ( 20% rdg + 20© )
AC Current
Range - Resistance : 100mA - 0.1mA
300mA - 0.3mA
1A - 0.001A
3A - 0.003A
10A - 0.01A
20A - 0.03A
Accuracy : ± ( 2.5% rdg + 1mA)
± ( 2.5% rdg + 2mA)
± ( 2.5% rdg + 0.003A)
± ( 2.5% rdg + 0.01A)
± ( 2.5% rdg + 0.03A)
± ( 2.5% rdg + 0.05A)
Display : 4 digits, 9999 counts
Max. Conductor Size : ø 32mm or 45mm x 32mm
Battery : 9V Alkaline
Size / Weight : H276 x W104 x D54mm / Approx. 1050g
Standard Accessories : 3 Calibration Loops ( 1© , 5© and 100© ) ,
Hard Case, Battery, Manual, Calibration, Constant Certificate
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