ชุดทดสอบความต้านทานดิน FLUKE 1625 KIT
FLUKE 1625 KIT Advanced Earth Ground Tester
The Fluke 1625 Kit, is a distinctive earth ground tester that can perform all four types of earth ground measurement. Specifically, the Fluke 1625 Kit tester is able to measure earth ground loop resistances using only clamps – called Stakeless testing. This method doesn’t require the use of earth ground stakes or the disconnection of ground rods.
Testing Methods
3- and 4-Pole Fall of Potential – standard earth ground testing using two ground stake
Selective testing – without disconnecting ground rods, a technician can measure ground resistance using a combination of stakes and a clamp
Stakeless testing – innovative solution using only clamps, instead of ground stakes, to measure earth ground loop resistance
The Fluke 1625 Kit offers these advanced features
Automatic Frequency Control (AFC) – identifies existing interference and chooses a measurement frequency to minimize its effect, providing a more accurate earth ground value
R* measurement – calculates earth ground impedance at 55 Hz to more accurately reflect the earth ground resistance that a fault-to-earth ground would see
Adjustable limits – for quick test result verification
Features:
4-pole earth ground measurement
4-pole soil resistivity testing
2-pole resistance measurement AC
2- and 4-pole resistance measurement DC
Selective testing, no disconnection of ground conductor (1 clamp)
Stakeless testing, quick ground loop testing (2 clamps)
Earth impedance measurement at 55 Hz
Automatic frequency control (AFC) (94, 105, 111, 128 Hz)
Measuring voltage switchable 20/48V
Programmable limits, settings
Continuity with buzzer
Specifications:
RA 3-pole Ground Resistance Measurement (IEC 1557-5)
Measuring voltage Vm = 20/48 V AC
Short circuit current 250 mA AC
Measure frequency 94, 105, 111, 128Hz
Resolution 0.001 Ω to 100 Ω
Measuring range 0.001 Ω to 299.9 kΩ
Intrinsic error ± (2 % of reading + 2 d)
Operating error ± (5 % of reading + 5 d)
RA 4-pole Ground Resistance Measurement (IEC 1557-5)
Measuring voltage Vm = 20/48 V AC
Short circuit current 250 mA AC
Measure frequency 94, 105, 111, 128Hz
Resolution 0.001 Ω to 100 Ω
Measuring range 0.001 Ω to 299.9 kΩ
Intrinsic error ± (2 % of reading + 2 d)
Operating error ± (5 % of reading + 5 d)
RA 3-pole Ground Resistance Measurement With Current Clamp
Measuring voltage Vm = 20/48 V AC
Short circuit current 250 mA AC
Measure frequency 94, 105, 111, 128Hz
Resolution 0.001 Ω to 10 Ω
Measuring range 0.001 Ω to 29.99 kΩ
Intrinsic error ± (7 % of reading + 2 d)
Operating error ± (10 % of reading + 5 d)
RA 4-pole Selective Ground Resistance Measurement With Current Clamp
Measuring voltage Vm = 20/48 V AC
Short circuit current 250 mA AC
Measure frequency 94, 105, 111, 128Hz
Resolution 0.001 Ω to 10 Ω
Measuring range 0.001 Ω to 29.99 kΩ
Intrinsic error ± (7 % of reading + 2 d)
Operating error ± (10 % of reading + 5 d)
Stakeless Ground Loop Measurement
Measuring voltage Vm = 20/48 V ac
Measure frequency 94, 105, 111, 128Hz
Noise current (Iext) Max. Iext = 3 A
Resolution 0.001 Ω to 10 Ω
Measuring range 0.001 Ω to 29.99 kΩ
Intrinsic error ± (7 % of reading + 2 d)
Operating error ± (10 % of reading + 5 d)
Environmental Specifications
Working temperature -10 °C to +50 °C
Operating temperature 0 °C to +35 °C
Nominal temperature +18 °C to +28 °C
Storage temperature -30 °C to +60 °C
Climatic class C1 (IEC 654-1), -5 °C to + 45 °C, 5 % to 95 % RH
Protection type IP56 for case, IP40 for battery door according to EN 60529
Safety Specifications
Safety rating CAT II, 300 V
Mechanical And General Specifications
Display 2999 Digit LCD – 7 segment liquid crystal display with special symbols and backlight
Size 133 mm x 187 mm x 250 mm
Weight 1.1 kg (including batteries)
Warranty Two years
Battery life Typical 3000 measurements (RE+RH ≤ 1 kΩ)
Typical 6000 measurements (RE+RH ≤ 10 kΩ)
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