Insulation Tester MD 542

Ordernr. 61831
EAN 4260409220621
€449.00
Excl. 16% VAT, excl. Shipping Cost
Goods expected soon
Details
Technical Service
+49 421 277 9999

Highlights

  • Measurement range: 10kΩ - 100GΩ
  • Voltage range: 150V - 500V
  • 7-segment display
  • PASS-FAIL test
  • Guard terminal

The MD542 is a smart, microprocessor controlled, 500 V insulation tester for up to 100 GΩ @ 500 V resistance measuring with 100 V, 250 V and 500 V test voltage. It is a portable, hand-held, battery-powered equipment. Due to its measurement principle (actual voltage and current readings) it is a "true megohmmeter" and so the accuracy of resistance measurement is not affected by any test voltage error.
Operation is very simple and user-friendly: just connect the leads, switch-on the equipment, select the test voltage and press the start button. Then the equipment automatically selects the most suitable scale and shows the measured value in the digital display. In order to guarantee the operator safety there are no accessible metallic parts. Output terminals are placed in the furthest and most protected area of the equipment.
A light indicator shows high-voltage presence and is switched-off when the capacities (both internal and external) are discharged up to reaching a safe value. Furthermore, it offers useful additional features: 200 mA continuity range, low resistance measurement, AC/DC voltage measurement up to 400 V, selectable timer, hold memory, and selectable resistance limits for pass-fail testing, with acoustic indication. Surface leakage paths may affect the measurement of high value insulation resistance. The use of the GUARD terminal permits to remove the effect of this current, substantially improving the test result.

NOMINAL TEST VOLTAGES

  • 100 V - 250 V - 500 V
  • Negative, DC voltage

RESISTANCE MEASUREMENT RANGE

  • From 10 kΩ up to 100 GΩ

SHORT CIRCUIT CURRENT

  • 1.5 ± 0.3 mA

TEST VOLTAGE ACCURACY

  • -0 / +15% for resistances between 5 MΩ and open circuit

BASIC ACCURACY

  • R ≤ 50 GΩ: ±5% of reading ± 2 digits
  • R > 50 GΩ: ±10% of reading ± 2 digits

LOW RESISTANCE MEASUREMENT AND CONTINUITY TESTER

  • Range: 0.05 Ω to 150 Ω
  • Accuracy: ±5% of reading ± 2 digits
  • Test current: up to 200 mA
  • Continuity indicator: Activates at R < 5 Ω ± 0.5 Ω

BUILT-IN TIMER

  • 5 - 10 - 15 - 30 seconds
  • 1 - 2 - 3 - 5 - 10 - 15 minutes

PASS / FAIL TEST

  • 0.2 - 0.3 - 0.4 - 0.5 - 0.6 - 0.7 - 0.8 - 0.9 MΩ
  • 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 20 - 30 - 40 - 50 - 60 - 70 - 80
  • 90 - 100 - 200 - 300 - 400 - 500 - 600 - 700 - 800 900 MΩ
  • 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 GΩ

VOLTMETER

  • True RMS
  • Range: 0 - 400 V AC/DC
  • Accuracy: ±3% of reading ± 2 digits

OVERVOLTAGE PROTECTION

  • 600 V

ADDITIONAL FEATURES

  • Automatic Polarization Index
  • Guard terminal
  • Hold function

SAFETY CLASS

  • In accordance with IEC 61010-1

E.M.C.

  • In accordance with IEC 61326-1

ELECTROSTATIC IMMUNITY

  • In accordance with IEC 61000-4-2

ELECTROMAGNETIC IRRADIATION IMMUNITY

  • In accordance with IEC 61000-4-3

POWER SUPPLY

  • Built-in, NiMH battery
  • Autonomy: 1000 tests of 5 seconds with an interval of 25
  • seconds according IEC 61557-2. During the measurement is
  • used a test resistance wich the value is UN x (1000 Ω / V)

BATTERY CHARGER

  • Built-in, with external power supply of 9 V - 0.5 A

OPERATION TEMPERATURE

  • 23°F to 122°F (-5°C to 50°C)

STORAGE TEMPERATURE

  • -13°F to 149°F (-25°C to 65°C)

HUMIDITY

  • 95% RH (without condensation)

WEIGHT

  • 0.5 kg

DIMENSIONS

  • 4.01" x  7.68" x 1.81" (102 x 195 x 46 mm)

INCLUDED ACCESSORIES

  • Measuring test leads (2)
  • GUARD test lead
  • Power supply
  • Carrying bag
  • Operating instructions