Megger MJ459 MJ 459 212459 Insulation Resistance Tester Multimeter
$1,005.41
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Megger MJ459 MJ 459 212459 Insulation Resistance Tester Multimeter
Megger MJ459 212459 Insulation Resistance Tester
Megger MJ459 MJ 459 212459 Insulation Resistance Tester Multimeter
Item Id: 7403
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Megger MJ459 MJ 459 212459 Insulation Resistance Tester Multimeter

The Megger 212459 MJ459 Insulation Resistance meter has excellent regulation of the testing voltage, direct measurement readouts & external guard terminal which eliminates surface current leakage from your measurements. 

The MJ459 features a classic analog display with 4 selectable testing voltages of 1000, 500, 250 and 100 Volts DC, measuring insulation resistances to 2000 MOhms, & an Ohms range of 5000. Power for the 212459 is produced with 6 AA size alkaline batteries.
 
As an additional safety feature, AC voltage range is effective when you connect to the test circuit. A warning alerts you that the test circuit isn't de-energized before your MJ459 is operated. Although calibrated for AC voltages, this range monitors the innovative auto-discharge feature so after electrical equipment with capacitance has completed testing an indication is given that voltage is discharged to safe levels to remove your test leads.
 

Megger 212459 MJ459 Features
  • No scaling multipliers
  • Multiple testing voltages for step and spot voltage tests
  • Guard terminal eliminates surface current leakage
  • Accurate, fast measurements
MJ 459 Includes
  • 6172-113 -- User guide
  • 6220-436 -- Set of test leads (3 clips, 3 prods, 3 leads)
  • 25970-002 -- Power cord if applicable
  • 6172-111 -- Test recodring card (5 included)
  • 6420-111 -- Carry case
Applications
 
Testing larger or complex electrical installations, commissioning, maintaining or servicing electrical equipment. The MJ459 is designed for safe tests on cables, generators, motors, distribution networks, transformers, switchgear, domestic and industrial installations, components & appliances.
 
Equipment and installations can test at 1000 Volts DC when specified, also telecommunications and aircraft equipment can test at 100 Volts DC & 110 - 120 Volts AC. Systems can also be tested with 250 Volts DC.
 
Test leads that have fused prods are also available & it is advised that they be utilized while checking equipment that is isolated from any supply (perform voltage test), specifically with high energy testing situations.

MJ459 Specifications

Insulation Ranges Insulation Resistance - 0.1 Ohm - 2000 MOhms
Accuracy - +/-1.25 percent fsd on 2.8 inch (71.1 millimeter) arc length
Test Voltages - Nominal DC - 100, 250, 500, 1000 Volts
Accuracy 250, 500, 1000 Volts +30 percent, -0 percent maximum
50, 100 Volts, +40 percent, -0 percent maximum
Midscale - 4 MOhms 
Current for Short Circuit - 1.9 milliAmps
Load Capacitance max  -
1 microF w/ less than +/-0.1 inch pointer movement
Discharge - to 1 microF capacitance discharged from 1000 Volts - below 42.4 Volts in under 4 seconds
Resistance Range - 0.1 - 5000 Ohms
Test Voltage Open circuit Testing
voltage: 3 Volts +/- 0.2 Volts
Current for Short Circuit - 2 milliAmps +/-10 percent
Accuracy -+/-1.25 percent fsd on 2.8 inch (71.1 millimeter) arc length
Voltage Safety Check Voltage measurements - 0.1 to 600 Volts AC - meter RMS calibrated & avg. responding
Safety voltage indicatoin - Indicates DC Voltage presence 
AC meter has differnt scaling. True DC voltage = scale rdg / 2.22
Accuracy - 2.5 percent full scale
Power Supplies MJ159 - Low-voltage brushless AC generator. Crank speed from 130 - 170 rpms
MJ359 - Low voltage dual operation brushless AC generator - or 120
Volt 50 / 60 Hertz mains supply (line)
MJ459 - 6 -- LR6 IEC cells "AA" size Battery operation time not under 1300 Resistance range or insulation tests
MJ559 - Dual operation 120
Volt 50 / 60 Hertz mains supply (line) & rechargeable battery. 6 Ni-Cad battery cells (NEDA 15NC, AA)
Safety
Meets requirement for double insulated EC 1010-1(1995), EN 61010 (1995) install.
Cat - II, 300 Volts phase - earth (ground), 600 Volts install. Cat-I
Flash Test 6 kiloVolts AC RMS
Fuses
500 milliAmps (FF) 660 Volts Ceramic 50 kAmps HBC 1.25 x .25 inch
(32 x 6 millimeters)
7A "F" 440 Volt Ceramic 10 kAmps "HBC"
1.25 x .25 inch (32 x 6 millimeters)
100 milliAmps (F) HBC 20 x 5 millimeters (line protection)
MJ459 & MJ559 - Power connect plug type fuse - 100 milliAmps 240 Volts HBC (20 x 6 millimeters)
fused plug mains power cord (if applicable) 3 Amp 250 Volt HBC ceramic fuse - BS1362
1.25 x .25 inch (32 x 6 millimeters)
EMC IEC 61326 compliant incl. amendment # 1
Operation Temp. Range 32 - 113 deg. F (0 - 45 deg. C) for battery operation models
14 - 122 deg. F (-10 - 50 deg. C)
Humidity Range Operation -
70 percent RH maximum @ 68 deg.F (20 deg.C)
60 percent RH maximum  @ 95 deg.F (35 deg.C)
50 percent RH maximum  @ 105 deg.F (40 deg.C)
Storage: 95 percent RH maximum @ 95 deg. F (35 deg.C)
Size (H x W x L) 5.1 x 4.9 x 7 inches
(130 x 125 x 180 millimeters)
Weight Approx. 1 kilogram (2.3 pounds)
Cleaning Method
Disconnect & wipe with clean cloth moistened w/ soapy water 
(IPA) Isopropyl Alcohol

Choose Options
Accessories
 20 Pack of test recording cards -- [call for price] 
 Test lead (black) w/ large alligator clip -- [call for price] 
 Test lead (red) w/ large alligator clip -- [call for price] 
 Test lead (green) w/ large alligator clip -- [call for price] 
 (FPK5) Fused prods test lead set - 1000 Volts AC 500 milliAmp fuse -- [call for price] 
 Test lead set - 3.6 meter (2 feet) 1 pair -- [call for price] 
 Floor testing electrodes 2.25 kilograms (5 pounds) each - one pair -- [call for price] 
 "A Stitch In Time" Manual -- [call for price] 
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