مشخصات فني


• اندازه گیری مقاومت زمین از 0.05 تا 1200Ω، می توان بدون خوشه کمکی زمین اندازه گیری کرد.
(سیستم ارتینگ چندگانه است.)
• واقعی RMS
خوانش دقیق RMS واقعی جریان AC از جمله شکل موج تحریف از 1mAتا 30.0A
• سر و صدا عملکرد چک
یک تابع برای تشخیص فعلی، که اثرات آن بر اندازه گیری مقاومت زمین و صفحه نمایش "مارک" سر و صدا بر روی ال سی دی.
• عملکرد حافظه
ذخیره و نمایش تا 100 داده های اندازه گیری.
• مطابق با استاندارد IEC 61،010-1: CAT.IV 300V آلودگی degree2
توجه داشته باشید:
ارتینگ واحد را نمی توان اندازه گیری کرد. (فقط برای سیستم ارتینگ چندگانه
 
  • The earth resistance from 0.05 to 1200Ω can be measured without the auxiliary earth spikes.
    (The Multiple Earthing System.)
  • True RMS
    Accurate true RMS readings of AC current including distorted waveform from 1mA to 30.0A
  • Noise Check Function 
    A function to detect current, which effects on an earth resistance measurement and display "NOISE" mark on the LCD.
  • Memory function 
    Save and display up to 100 measurement data.
  • Data hold function / Buzzer function / Back light function
  • Compliant with Safety Standards of IEC 61010-1 : CAT.IV 300V Pollution degree2

Note:
A single earthing can not be measured. (Only for Multiple Earthing System)

 TRUE RMSCE
 
 
 
4200


FunctionRangeResolutionMeasuring rangeAccuracy
Earth resistance Auto range20Ω0.01Ω*0.00~20.99Ω|±1.5%±0.05Ω
200Ω0.1Ω16.0~99.9Ω|±2%±0.5Ω
100.0~209.9Ω|±3%±2Ω
1200Ω1Ω160~399Ω|±5%±5Ω
400~599Ω|±10%±10Ω
10Ω600~1260Ω---
AC current
(50Hz / 60Hz)
Auto range		100mA0.1mA0.0~104.9mA|±2%±0.7mA
1000mA1mA80~1049mA|±2%
10A0.01A0.80~10.49A
30A0.1A8.0~31.5A
Operating system
Earth resistance function :Constant voltage injection,
Current detection, 
(Frequency : Approx.2400Hz)
Dual Integration
AC current function :Successive Approximation
Over-range indication"OL" is displayed when input exceeds the upper limit of a measuring range
Response timeApprox.7 seconds (Earth resistance)
Approx.2 seconds (AC current)
Sample rateApprox. 1 times per second
Power sourceDC6V : R6P (sizeAA manganese battery) × 4pcs,
or LR6 (sizeAA alkaline battery) × 4pcs
Current consumptionApprox. 50mA (max. 100mA)
Measurement timeApprox. 12 hours (when R6P is used)
Approx. 24 hours (when LR6 is used)
Auto power-offTurns power off about 10 minutes after the last button operation.
Applicable standardsIEC 61010-1 : 2001 (CAT.IV 300V Pollution degree2)
Withstand voltageAC5320Vrms / 5 seconds
Between the Transformer jaws fitted parts and Case enclosure
(except for jaws)
Conductor sizeApprox. 32mm max.
Dimension246(L) × 120(W) × 54(D)mm
WeightApprox. 780g (including batteries)
AccessoriesBattery R6P : 4pcs Instruction manual : 1pc
8304 (Resister for operation check : 1pc)
9128 (Hard case : 1pc)
•Crest factor < 3 (50Hz / 60Hz, peak value shall not exceed 60A)
*4 counts or less are corrected to 0.
  
 


Why earth resistance can be found by only clamping it?
 
 
 
 
 
Rx, is defined as earth resistance under test, and R1, R2...Rn are defined as earth resistance of other measuring objects.
 

These earth resistances, R1, R2, Rn can be considered that they are connected in parallel.
And they can be regarded as a combined resistance Rs. The Rs can be regarded small enough against Rx since a combined resistance consists of several resistances. Following is an equivalent circuit diagram of this circuit.
Voltage V is applied to the object (Resistance Rx) measured from the voltage injection transformer CT1, and the current I corresponding to the earth resistance is flowed.
The current I is detected with detection transformer CT2, and object (Resistance Rx) measured can be put out by the calculation. (refer to the right diagram)
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