Obsolete Test & Measurement Products

Instaltest AT - Automatic installation tester

626000717 (Obsolete)

The Instaltest AT is a versatile and easy to use installation tester according EN 61010-1 and EN 61557.

Autotest is integrated; a single push on the button displays an organized program showing which tests are performed automatically. The results are immediately stored and transported to the software where they will be transformed into a certificate. Available measurements include insulation resistance, RCD testing, impedance testing (Z-loop and Z-line) and earth resistance.


  • Insulation resistance
  • Continuity
  • RCD trip current
  • RCD Contact voltage
  • RCD trip time
  • Earthloop impedance without tripping RCD (Z-loop)
  • Line impedance (Z-line)
  • Automatic Z-loop & Z-line limits
  • Voltage
  • Frequency
  • Earth resistance
  • Soil resistivity (adapter required)
  • Varistor test
  • Phase rotation
  • Extra low range loop impedance


Insulation resistance
100, 250, 500 and 1000 V
0.15...1000 MΩ
Testcurrent 200 mA (LPE, NPE)
7 mA (LPE, NPE)0.16..1999 Ω
Nominal voltage 100...264 V / 45...65 Hz
RCD trip current 10, 30, 100, 300, 500, 1000 mA
RCD contact voltage 0.0...99.9 V
Test current < 0.5 x IΔn
RCD trip time 0...300 ms
Test current RCD 0.5 x IΔn / 1 x IΔn (not IΔn = 1000mA type B) / 2 x IΔn (niet n = 1000mA type A of IΔn ≤ 300 mA type B)
Type RCD G en S
Current type AC / A / B
Loop 0.00...9.99 kΩ
Line 0.00... 9.99 kΩ
Voltage 0...550 V
Frequency 0.00...999.99 Hz
Earth resistance (3 point) 0...9999 Ω
Soil resistivity (adapter required) 0...1000 kΩ
Varistor test 0...1000 VDC, 0...625 VAC
Phase rotation 100..550 VAC
Indication phase sequence Yes
PC interface USB/RS232
Overvoltage category CAT III 600 V
Protection IP40
Supply 6xLR06 AA batteries
Dimensions 230 x 115 x 103 mm
Weight 1.3 kg (excl. batteries)
Including Manual, strap, RS232 and USB cable, InstalLink Pro software. quickstart manual. rechargeable batteries, charger, alligator clamps

Product information request

Railway rolling stock
Railway signalling