• Analog display of measured values and limit values
• Intelligent filter – precise and measurement-dependent activation for the measurement of very high resistances – beating, i. e. compensation of 16 2/3 Hz and 50 Hz interference – attenuation of capacitive influences from power cables, etc. – suppression of electric field influences
• Signalling of dangerous contact voltage by means of LED
• Indication of limit value violations by means of LED
• Overvoltage protection – protects the instrument in the event of inadvertent connection to mains power
• Fuse link for all resistance measuring ranges
• Electronic fuse for protection of the low-resistance measurement RLO also protects the fuse link in the low-resistance measuring range in the event of faulty operation
• One measuring point self-test with test resistance of 10 MΩ per EN 50110 / VDE 0105-100
• Guard terminal for compensating surface current

Measurements analog
Measuring ranges Riso 10 k … …1 TΩ
Riso U = 50, 100, 250, 500 / 1000 V
RLO 0,01 … 10 Ω
U 0 … 500 / 1000 V

Display functions
Backlit display
Limit value LED Limit (green/red) Additional acoustic signal, limit value per VDE 0100 Riso, RLO
LED for dangerous contact voltage (when switched off)
LCD symbol for external voltage
Battery level display

Special functions
Discharge capacitive devices under test
Safety shutdown (UBatt < 8 V)

Features
Measuring categories CAT II 1000V, CAT III 600V
Measuring category CAT III 600V, CAT IV 300V
Integrated 10 MΩ test resistor
DAkkS calibriation certificate in scope of delivery, Proprietary certificate

The insulation measuring instruments are suitable for the following tasks:

• Measurement of insulation resistance at voltage-free devices and systems, up to 1000 V
• Checking of test objects for absence of voltage in systems with up to 1 kV
• Testing of the resistance of earthing conductors, protective conductors and equipotential bonding
• Testing of electrostatic discharge capacity at floor coverings (using shielded measurement cables) – EN 1081
• With the help of the so-called 1 mA test per DIN VDE 0845/ EN 61645, testing for the triggering of performance category B and C / SPD type 2 and 3 surge protection devices (varistors, reference diodes etc.) can be executed with this measuring instrument, on-site as well, and evaluated in accordance with the manufacturer’s data.

Discharging Capacitive Devices Under Test

Capacitive devices under test such as cables and coils, which may be charged with test voltage, are discharged by the measuring instrument. The falling voltage value can be observed at the display.

1 Insulation and resistance measuring instrument
1 Factory calibration certificate
1 Set of batteries
1 Carrying strap
1 Alligator clip
1 KS17-4 cable set
1 Condensed operating instructions
1 Supplement Safety Information
– Detailed operating instructions for download from our website at www.gossenmetrawatt.com