KYORITSU Earth Clamp Tester 4200
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Jawa Barat - Bekasi
Update Terakhir :
11-02-2016 13:55
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KYORITSU Earth Clamp Tester 4200 Produk Terbaik dari
ANDALAN PRIMA SEJAHTERA LABORATORY EQUIPMENT, CHEMICAL, GLASWARE, MEASURING AND TEST
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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