MEGGER MJ459 CALIBRATION and MEGGER MJ459 REPAIR

 
A calibration by Custom-Cal is performed by engineers with extensive OEM experience. We have the expertise and the necessary standards to perform the MEGGER MJ459 Calibration, onsite calibration may be available. We specialize in quick turnaround times and we can handle expedited deliveries upon request.

 

 
   MEGGER MJ459 (212459)   Description / Specification:    
MEGGER MJ459 100/250/500/1000 V Insulation Tester

The Megger MJ459 insulation tester is designed to give rapid, accurate and direct measurement of continuity and insulation resistance of domestic and industrial wiring, cables, transformers, motors, generators electrical machinery and appliances.
It is self-powered, and is suitable for use during installation and commissioning work as well as for service and maintenance applications.
Specifications.

Insulation Range.
Insulation Resistance: 0.1Ω - 2000 MΩ.
Nominal Test Voltages dc: 100 V, 250 V, 500 V, 1000 V.
Accuracy: 250 V, 500 V, 1000 V +30%, -0% maximum; 100 V, +40%, -0% maximum.
Midscale: 4 MΩ.
Short Circuit Current: 1.9 mA.
Accuracy: ±1.25% of fsd on a 2.8 in. (71.1mm) arc length: [0.035 in. (0.9mm)].

Resistance Range.
Range: 0.1Ω - 5000Ω.
Open circuit Test voltage: 3 V ±0.2 V.
Short Circuit Current: 2 mA ±10%.
Accuracy: ±1.25% of fsd on a 2.8 in. (71.1mm) arc length: [0.035 in. (0.9mm)].
Maximum Load Capacitance: 1μF with less than ±0.1” pointer movement.
Discharge: Up to 1μF capacitance is discharged from 1000V to less than 42.4 V in less than 4 seconds.

Safety Voltage Check.
Voltage measurement: 0.1 V - 600 V ac; the meter is RMS calibrated and average responding.
Safety voltage indicator: Indicates the presence of dc voltages, scaling is not the same as the ac meter; true dc voltage equals scale reading divided by 2.22.
Accuracy: 2.5% of full scale.

Power Supply.
Six IEC LR6 cells (AA) .
Battery life: not less than 1300 insulation or Resistance range tests.



 



Related Bench Equipment Terms and Definitions. For a complete list go to our  Terms and Definitions Page.

Averaging
Averaging is a mathematical process to reduce the variation in a measurement by summing the data points from multiple measurements and dividing by the number of points summed.

Fall Time
Fall time is the time required for the amplitude of a pulse to decrease (fall) from a specified value (usually 90 percent of the peak value exclusive of overshoot or undershoot) to another specified value (usually 10 percent of the maximum value exclusive of overshoot or undershoot).

Noise Density
Noise Density is the amount of noise within a defined bandwidth, usually normalized to 1 Hz.

Resolution Bandwidth (RBW)
Resolution Bandwidth (RBW) is the minimum bandwidth over which you can separate two signals and still see them.


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