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SKU: MT390

Multifunction Installation Tester

$2,070.00 ex. GST
$2,277.00 inc. GST

  • CAT IV 400V
  • 3.5″ TFT colour LCD display 320 x 240 pixels
  • Continuity 400ꭥ
  • Insulation Resistance 125/250/500/1000V
  • Loop Range 999ꭥ
  • Voltage Measurements 80-500V
  • Frequency Response 45-65Hz
  • Earth Resistance 2000ꭥ
  • Measuring Range 2000ms
  • PSC/PFC 23000A
  • Short Current >200mA
  • Variable RCD test with Pass/Fail indication
  • Line Voltage with Frequency
  • Loop and PSC test, Phase Rotation
  • Transmit recorded data via Bluetooth / SD Card / USB
  • Voltage recording with Graph
  • Combined readings on the images
  • Safety design with sliding shield plate to avoid electric shock
  • Standard accessories include Earth Resistance Spikes and Leads
  • Battery Lifespan
    • Removeable Battery Pack – 500 cycles
    • Internal Lithium Battery – 1000 cycles
  • Bluetooth 4.0 Technology

The MT390 is a fast and accurate Multifunction Installation tester which makes testing installations easy and ensures that it is safe and complies to regulations, and is a must have in an electrician’s arsenal. It is the most cost effective MFT on the market and is a firm favourite with electrical installers and commissioning engineers. The unit features Insulation resistance, Low Ohm measurement, Loop/PSC measurement, RCD measurement, Earth resistance measurement, Phase rotation and shows mains voltage with frequency on screen. The MT390 has soft key and menu options allowing the user to access the easy-to-use menu to select and change parameters, and a friendly “Help” option displays a wiring diagram on screen to ensure correct connection. With safety in mind, the meter connections panel has a protective slide that prevents incorrect connection while charging and communicating with the meter. The 3.5″ TFT screen displays multiple readings clearly and are visible from all angles. The instrument allows the user to save, review and label recordings. The all-in-one design includes Bluetooth file transfer and an internal memory with easy-to-use software that eliminates time consuming paperwork while testing multiple sites. The Bluetooth app allows the user to instantly share a measurement to a smartphone, both iOS and Android devices are supported, and the test report can be shared instantly via email in CSV format. Other connection options include Mini USB, S-Video TV out and MicroSD. The rugged double injection rubber housing withstands the knocks and bangs of everyday heavy use, and is supplied in a hard plastic carrying case. The MT390 complies with the IEC 61010 CAT IV 400V safety ratings.


Function Range Resolution Accuracy
Continuity 4-400.0Ω 0.001Ω ±(1.5% + 30 Digits)
Insulation Resistance 125/250/500/1000V 0.125 – 4000MΩ ±(2% + 10 Digits)
Loop Range 0 – 999Ω 0.01Ω ±(4% + 6 Digits)
PSC/PFC 0.23A – 23000A Derived from Loop and Voltage measurement
RCD x 5, x 1, x 1/2, auto ramp mA 15/30/50/100/200/500/650/1000mA
Measuring Range 2000ms ±(1% + 3)
Voltage Measurement 80V – 500V 1V ±(2% + 2 Digits)
Frequency Response 45-65Hz 1Hz ±(2Hz)
Earth Resistance 99.99/2000Ω 0.01Ω ±(2% + 30 Digits)
Short Circuit Current >200mA
Rated Current 1mA
Loop Impedance L-PE, L-PE(ATT), L-N, L-L
Test Current 8.0A – 25.0A
Phase Angle 0° to 180°
PC Interface USB/Bluetooth
Display 3.5″TFT Display
Memory SD Card
Back Light Yes
Enclosure Over Moulded case
Low Battery Indication Yes
Batteries 8 x AA
Weight 631g
Dimensions 220 x 94.6 x 60.5mm
Safety Specs IEC61010-1 CAT IV 400V

Safety Ratings


Carrying Case
Neck Strap
Test Leads (Test Leads with remote switch, RSA Socket Test Lead, Insulation Test Lead, Phase rotation Test Lead with Croc Clips)
USB Cable
3 Wire Cable (Earth Resistance Test Leads)
Aux Earth Spikes
8 x AA Batteries
Instruction Manual