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MY40 Digital Insulation Tester

Brand: Yokogawa Electric Corporation

The MY40 insulation tester is used to measure the Insulation resistance that represents the state of insulation of electric equipment or circuits; It is one of the important measurement parameters in terms of safety and security. 

The MY40 comes with 4 voltage/resistance ratings on an easy-to-view large display, and incorporates a double-action safety mechanism to keep the user from harm.
Features
  • Digital model with 4 voltage/resistance ratings
  • Multifunction
  • Insulation resistance, AC voltage and conductor resistance measurement
  • Insulation test mode: comparator, memory, auto-hold and discharge functions
  • All test modes: live-line alarm (excluding AC voltage measurement), battery check and automatic power-off
  • Easy-to-view, fluctuation-free display
  • Double-action safety mechanism

Specifications

Accuracy

  • ± (2 % of Reading + 6-Digits)
  • ± (2 % of Reading + 8-Digits)

Ambient Temperature Range

  • 23° ± 5° C (73.4° ± 9° F)

Current

  • 0.5 mA - Rated Current
  • 1 mA (0 to 20 %) when in First Effective Measuring Range - Rated Measuring Current
  • 2 mA - Max.

Display

  • 3-1/2-Digit LCD
  • Backlight-Illuminated

External Magnetic Field Effect

  • ≤ ± 1.2 % (Digital) when an External Magnetic Field of 400 A/m DC
  • ≤ ± 3 % (Analog) when an External Magnetic Field of 400 A/m DC

Frequency

  • 45 to 400 Hz

Function

  • Auto Hold
  • Automatic Discharge
  • Comparator Function
  • Conductor Resistance Measurement
  • Memory Function

Humidity

  • 45 to 75 % Relative Humidity at 23° ± 5° C (73.4° ± 9° F)
  • 70 % Relative Humidity, Max.
  • 90 % Relative Humidity, Non-Condensing - Operating Humidity Range

Input Impedance

  • Approximately 2 megaohms
  • Buzzer Sound Resistance: < 40 ohms

Measuring Range

  • 0 to 2,000 megaohms
  • 0 to 600 V to AC Voltage Measuring Range
  • 400 ohms - Conductor Resistance Measurement

Operating Temperature

  • 0° to 40° C (32° to 104° F)

Power Requirement

  • 4 AA (R6P) Batteries

Rating

  • 1,000 V / 2,000 megaohms
  • 125 V/200 megaohms
  • 250 V / 200 megaohms
  • 500 V / 2,000 megaohms

Resistance

  • < 40 ohms - Buzzer Sound Resistance
  • 0.125 to 2 megaohms - Lower Limit of Measured ohms
  • Approximately 4,000 megaohms Min. (500 V / 1,000 V) - Indication of Infinity Mark on Bar Graph
  • Approximately 400 megaohms Min. (125 V/250 V) - Indication of Infinity Mark on Bar Graph

Resolution

  • 0.1 ohm - Conductor Resistance Measurement
  • 0.1 to 1,000 kiloohms
  • 1 V - AC Voltage Measurement

Storage Temperature

  • -10° to 60° C (14° to 140° F)

Supply Voltage

  • 130 %, Max.

Temperature Effect

  • A Change in the Reading at an Ambient Temperature of 23° C (73.4° F) Must Not Exceed ± 2 %

Tolerance

  • ± (2 % of Reading + 6-Digits)
  • ± (5 % of Reading + 6-Digits)
  • ± 5 % of Reading

Zero Offset

  • 6-Digits, Max.
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