Kyoritsu Earth Clamp Tester KEW 4202 - Kyoritsu Indonesia

Kyoritsu Indonesia - Earth Clamp Tester KEW 4202

Distributor for Kyoritsu Indonesia : Multimeters,Voltage Tester,Clamp Meters,Insulation Testers, Earth Testers,Loop/PSC/RSD Testers,Loggers,Multi Function Testers,Portable Appliance Testers,Power Meters,Others, Sensors

Earth Clamp Tester

4202

Various useful functions are available on Android devices using Bluetooth communication

Free Android software "KEW smart 4202"
is available on "Google Play Store" (*)

Supporting Android ver. 2.2 - 4.0
WVGA (800 × 480) resolution or higher


(*)	Please search "KEW Smart" in Google Play Store. Communication charge may be incurred separately to download application.

•

Real time measurements can be transferred, shown and saved on Android device (up to 100 measurements)

•

Saved data includes measurement, GPS location and date & time
Easy to check on map "When" and "Where" the measurement was made

•

Comparator function on Android device informs when the measured value is lower/higher than the preset value

Earth /Ground resistance and Leakage current measurement functions
•	The earth resistance from 0.05 to 1200 Ω can be measured without the auxiliary earth spikes in multi-earthing systems
•	True RMS leakage or phase current readings from 0.1mA to 30.0A provides vital additional information in earthing networks
•	Filter function offers increased immunity to electrical noise and a Noise mark appears in excessively high noisy environments

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

1200Ω

1Ω

160~399Ω

|±5%±5Ω

400~599Ω

|±10%±10Ω

10Ω

600~1260Ω

---

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 indication

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 time

Approx. 7 seconds (Earth resistance)
Approx. 2 seconds (AC current)

Sample rate

Approx. 1 time per second

Power source

LR6/R6 (AA) (1.5V) × 4

Current consumption

Approx. 90mA (max. 140mA)

Measurement time

Approx. 21 hours (when LR6 is used)
Approx. 5 hours (when R6 is used)

Auto power-off

Turns power off about 10 minutes after the last button operation

Applicable standards

IEC 61010-1 CAT.IV 300V Pollution degree 2
IEC 61010-2-032, IEC 61326-2-2 (EMC)

Withstand voltage

AC 5320Vrms/5 seconds
Between the Transformer jaws fitted parts and case enclosure (except for jaws)

Conductor size

Approx. φ32mm

Dimension

246 (L)×120 (W)×54 (D) mm

Weight

Approx. 780g (including batteries)

Accessories

8304 (Resistors for operation check)
9167 (Carrying case [Hard])
LR6 (AA) × 4, Instruction manual

• 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)