KYORITSU Earth Clamp Tester 4200
Pengiriman :
3 hari sejak pembayaran
Lokasi :
Jawa Barat - Bekasi
Update Terakhir :
11-02-2016 13:55
Detail Produk
The earth resistance from 0.05 to 1500Ω can be measured without the auxiliary earth spikes.
(The Multiple Earthing System.) |
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True RMS
Accurate true RMS readings of AC current including distorted waveform from 1mA to 30.0A |
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Noise Check Function
A function to detect current, which effects on an earth resistance measurement and display "NOISE" mark on the LCD. |
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Memory function
Save and display up to 100 measurement data. |
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Data hold function / Buzzer function / Back light function |
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Compliant with Safety Standards of IEC 61010-1 : CAT IV 300V Pollution degree2 |
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Note:
A single earthing can not be measured. (Only for Multiple Earthing System) |
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| Function |
Range |
Resolution |
Measuring range |
Accuracy |
| Earth resistance Auto range |
20Ω |
0.01Ω* |
0.00 - 20.99Ω |
|±1.5%±0.05Ω |
| 200Ω |
0.1Ω |
16.0 - 99.9Ω |
|±2%±0.5Ω |
| 100.0 - 209.9Ω |
|±3%±2Ω |
| 1500Ω |
1Ω |
160 - 399Ω |
|±5%±5Ω |
| 400 - 599Ω |
|±10%±10Ω |
| 10Ω |
600 - 1580Ω |
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AC current
(50Hz / 60Hz)
Auto range |
100mA |
0.1mA |
0.0 - 104.9mA |
|±2%±0.7mA |
| 1000mA |
1mA |
80 - 1049mA |
|±2% |
| 10A |
0.01A |
0.80 - 10.49A |
| 30A |
0.1A |
8.0 - 31.5A |
| Operating system |
| Earth resistance function : |
Constant voltage injection,
Current detection,
(Frequency : Approx.2400Hz)
Dual Integration |
| AC current function : |
Successive Approximation |
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| Over-range indication |
"OL" is displayed when input exceeds the upper limit of a measuring range |
| Response time |
Approx.7 seconds (Earth resistance)
Approx.2 seconds (AC current) |
| Sample rate |
Approx. 1 times per second |
| Power source |
DC6V : R6 (sizeAA manganese battery) × 4pcs,
or LR6 (sizeAA alkaline battery) × 4pcs |
| Current consumption |
Approx. 50mA (max. 100mA) |
| Measurement time |
Approx. 12 hours (when R6 is used)
Approx. 24 hours (when LR6 is used) |
| Auto power-off |
Turns power off about 10 minutes after the last button operation. |
| Applicable standards |
IEC 61010-1 : 2001 (CAT IV 300V Pollution degree2) |
| Withstand voltage |
AC5320Vrms / 5 seconds
Between the Transformer jaws fitted parts and Case enclosure
(except for jaws) |
| Conductor size |
Approx. 32mm max. |
| Dimension |
246(L) × 120(W) × 54(D)mm |
| Weight |
Approx. 780g (including batteries) |
| Accessories |
Battery R6 (AA) × 4, Instruction manual
8304 (Resister for operation check)
9166 (Hard case) |
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•Crest factor < 3 (50Hz / 60Hz, peak value shall not exceed 60A)
*4 counts or less are corrected to 0. |
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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. |
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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. |
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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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