KYORITSU 4202 - Manual (Page 6)

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3. Specification
Operating system Earth resistance function: Constant voltage injection,
Current detection,
(Frequency: Approx.2400Hz)
Dual Integration
AC current function:Successive Approximation(True-RMS)
Display Liquid crystal display with a maximum count of 2099
Over-range indication "OL" is displayed when input exceeds the upper limit
of the measuring range
Response time Earth resistance function :Approx. 7 seconds
AC current function :Approx. 2 seconds
Sample rate Approx. once per second
Location for use Altitude 2000m or less, Indoor/ outdoor use
IP protection degree IP40
Temperature & humidity range 23℃ ±5℃ /Relative humidity 85% or less
(guaranteed accuracy) （no condensation）
Operating temperature & -10℃ to 40℃ /Relative humidity 85% or less
humidity range (no condensation)
Storage temperature & -20℃ to 60℃ /Relative humidity 85% or less
humidity range （without batteries, no condensation）
Power source DC6V: R6P (size AA manganese battery) x 4pcs, or
LR6 (size AA alkaline battery) x 4pcs
Current consumption MODEL4200 : Approx. 50mA (max. 100mA)
KEW4202 : Approx. 90mA (max. 140mA)
Measurement time MODEL4200 : Approx. 12 hours (when using R6P), or
24 hours (when using LR6)
KEW4202 : Approx. 5 hours (when using R6P), or
21 hours (when using LR6)
Measuring range and accuracy
Function Range Resolution Measuring range Accuracy
Earth resistance
(Auto-ranging)
20Ω 0.01Ω 0.00 - 20.00Ω ±1%±5dgt
200Ω 0.1Ω 20.0 ‒ 200.0Ω ±3%±5dgt
600Ω 1Ω
200 - 399Ω ±6%±5dgt
400 - 599Ω ±10%±10dgt
1200Ω 10Ω 600 - 1260Ω -
AC current (ACA)
(50Hz/60Hz)
(Auto-ranging)
100mA 0.1mA 0.0 - 100.0mA
±2%±5dgt
(sine wave)
1000mA 1mA 100 - 1000mA
10A 0.01A 1.00 - 10.00A
30A 0.1A 10.0 - 30.0A
* Crest factor ≦2.5 Accuracy at sine wave +1% (50Hz/60Hz, peak value shall not exceed 60A)
* In the following cases, zero will be displayed on the LCD.
- At 20Ω range of Earth resistance function: 0.04Ω or less
- At 100mA range of ACA function: 0.4mA or less
* A range shifts to upper range when the input exceeds 105% of the selected range, and shifts
to the lower range when the input falls under 80% of the range.