Owner's manual

̶ 4 ̶
3. Specification
󱛠 Operating system Earth resistance function: Constant voltage injection,
Current detection,
(Frequency: Approx. 2400 Hz)
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 2000 m or less, Indoor/ outdoor use
󱛠 IP protection degree IP 40
󱛠 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 DC 6 V: R 6 P (size AA manganese battery) x 4 pcs, or
LR
6 (size AA alkaline battery) x 4 pcs
󱛠 Current consumption MODEL 4200 : Approx. 50 mA (max. 100 mA)
KEW
4202 : Approx. 90 mA (max. 140 mA)
󱛠 Measurement time MODEL 4200 : Approx. 12 hours (when using R 6 P), or
24 hours (when using LR 6 )
KEW
4202 : Approx. 5 hours (when using R 6 P), or
21 hours (when using LR 6 )
󱛠 Measuring range and accuracy
Function Range Resolution Measuring range Accuracy
Earth resistance
(Auto-ranging)
20 Ω 0 . 01 Ω 0 . 00 - 20 . 00 Ω ± 1 % ± 5 dgt
200 Ω 0 . 1 Ω 20 . 0 ‒ 200 . 0 Ω ± 3 % ± 5 dgt
600 Ω 1 Ω
200 - 399 Ω ± 6 % ± 5 dgt
400 - 599 Ω ± 10 % ± 10 dgt
1200 Ω 10 Ω 600 - 1260 Ω -
AC current (ACA)
( 50 Hz/ 60 Hz)
(Auto-ranging)
100 mA 0 . 1 mA 0 . 0 - 100 . 0 mA
± 2 % ± 5 dgt
(sine wave)
1000 mA 1 mA 100 - 1000 mA
10 A 0 . 01 A 1 . 00 - 10 . 00 A
30 A 0 . 1 A 10 . 0 - 30 . 0 A
* Crest factor ≦ 2 . 5 Accuracy at sine wave + 1 % ( 50 Hz/ 60 Hz, peak value shall not exceed 60 A)
* In the following cases, zero will be displayed on the LCD.
- At 20 Ω range of Earth resistance function: 0 . 04 Ω or less
- At 100 mA range of ACA function: 0 . 4 mA 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.