KEW 3128


  • CAT4 600V
  • Backlight
  • USB
  • AutoPowerOff
  • 500V
  • 1000V
  • 2500V
  • 5000V
  • 1KV~10KV
  • 12KV
  • External

Insulation resistance (*): Accuracy is not guaranteed with setting of 250V or less

Rated voltage 500V 1000V 2500V 5000V 10000V 12000V
Max measurement value 500GΩ 1TΩ 2.5TΩ 5TΩ 35TΩ
Accuracy 400k~50GΩ ±5%rdg±3dgt
800k~100GΩ 5%rdg±3dgt 2M~250GΩ ±5%rdg±3dgt 4M~500GΩ ±5%rdg±3dgt 8M~1TΩ ±5%rdg±3dgt
10T – 35TΩ
Values are displayed, but accuracy isn’t guaranteed
Short circuit current Max 5.0mA
Load resistor to output rated voltage 0.5MΩ or more 1MΩ or more 2.5MΩ or more 5MΩ or more 20MΩ or more 24MΩ or more

Output voltage

Rated voltage 500V 1000V 2500V 5000V 10000V 12000V
Monitor accuracy ±10%±20V ±10%±20V ±10%±20V ±10%±20V ±10%±20V ±10%±20V
Output accuracy 0 – +20% 0 – +10% 0 – +10% 0 – +10% -5 – +5% -5 – +5%
Selectable range 50 – 600V
(in steps of 5V)
610 – 1200V (in steps of 10V) 1225 – 3000V (in steps of 25V) 3050 – 6000V (in steps of 50V) 6100 –
10000V (in steps of 100V)
10100 – 12000V (in steps of 100V)

Voltage measurement

Measuring range DCV:±30 ~ ±600V、ACV:30 ~ 600V (50/60Hz)
Accuracy ±2%rdg±3dgt

Current measurement

Measuring range 5.00nA – 2.40mA (Depending on the insulation resistance)

Capacitance measurement

Measuring range 5.0nF ~ 50.0μF
5.0nF – 1.0µF (display range: 5.0nF – 50.0µF) (10000V/12000V)
Accuracy ±5%rdg±5dgt


Applicable standards IEC 61010-1 CAT IV 600V Pollution degree 2,
IEC 61010-031, IEC 61326, IEC 60529 (IP64): with the lid closed.
Operating temperature & humidity range -10ºC – Relative humidity 85% or less
50ºC /(when operating with an external power supply, no condensation)
0ºC – 40ºC /Relative humidity 85% or less
(when operating with battery, no condensation)
Storage temperature & humidity range -20ºC – 60ºC / Relative humidity 75% or less (no condensation)
Power source Rechargeable Lead storage battery (12V)*
Charging time: approx. 8 hours / AC Power supply (100V – 240V, 50/60Hz)
* Continuous measuring time:
approx. 4 hours
(a load of 100MΩ at the Insulation resistance 12000V Range.)
approx. 2 hours
(Max current consumption in range while rated currents are maintained.)
Dimensions 330 (L) × 410 (W) × 180 (D) mm *Instrument and Hard case
Weight 9kg approx. (including battery) *Instrument and Hard case
Included Accessories 7170 (Main cord), 7224A (Earth cord), 7225A (Guard cord), 7226A (Line probe),
7227A (Line probe with alligator clip), 8029 (Extension prod),
8212-USB-W (USB adaptor with KEW Windows (Software)),
Instruction manual
Optional Accessories 7254 (Longer Line probe with alligator clip)

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