Technical DataBT51DLRO10 DLRO10XDLRO10HDDLRO10HDXDLRO100DLRO200DLRO200-115DLRO600CommentsTest currents2 A10 A10 A0.1 - 10 A0.1 - 10 A10 - 110 A10 - 200 A10 - 600 ACurrent steps2 APreset values: 100 μA, 1 mA, 10 mA, 100 mA, 1 A, 10 APreset values: 100 μA, 1 mA, 10 mA, 100mA, 1 A, 10 APreset values: 0.1 mA, 1 mA, 10 mA, 100 mA, 1 A, 10 APreset values: 0.1 mA, 1 mA, 10 mA, 100 mA, 1 A, 10 A1 A(Also 10 A, 50 A and 100 A presets)1 A1 AMax test time at max current1 A continuous on inductive mode1 A continuous on inductive mode60 sec60 sec10 min>10 min>60 secMax continuous current2 A10 A10 A10 A10 A100 A (10min )200 A (15 min)200 A (15 min)Long test times can help locate weaknesses by heatingMax. resistance for max. current2 Ω1.999 mΩ***1.999 mΩ***250 mΩ250 mΩ100 mΩ19 mΩ11 mΩ11 mΩSubtract expected test resistance and you can calculate max. test lead length ***Power limited to 0.25W for sensitive applicationsMeasurement range2000 mΩ and 20.00 mΩ1.9999 mΩ - 1999.9Ω 1.9999 mΩ - 1999.9Ω 0 Ω - 250 mΩ0 Ω - 250 mΩ0.1 μΩ - 1.999 Ω0.1 μΩ - 999.9 mΩ0.1 μΩ - 999.9 mΩBest resolution1 mΩ 0.01 mΩ0.1 μΩ0.1 μΩ0.1 μΩ0.1 μΩ0.1 μΩ0.1 μΩ0.1 μΩInaccuracy± 1% ± 2 digit± 0.2% ± 0.2 μΩ± 0.2% ± 0.2 μΩ± 0.2%± 0.2%± 0.2% + 2 μΩ± 0.7% + 1 μΩ0.6% + 0.3 μΩRipple free DC■■■■■■Ideal for testing circuit breakers with active relay system connected without trippingAdditional smoothing on DC■Can test most circuit breakers with active relay system connected without trippingDualGround■Used when testing circuit breakers with both side connected to ground, with out additional inaccuracy.Ramp up/down (Automatic)■■■■Ideal for testing circuit breakers with active relay system connected without trippingAC DemagnetizationRemote control■Depending on modelBuilt in printerUser settable High and low test limits■■Depending on model■■■Ideal for rapid testing to pre-determined test limitsData storage■■■ Depending on model■■■Memo field for stored test results■■■■Make note of issues or corrective action requiredCommunication PCRS232USBUSBDepending on modelRS232RS232RS232Battery operated■■Detachable battery pack■ Detachable battery pack■**■**■***Operates from line supply even with a dead batteryCAT rating *CAT III 600 VCAT III 600 VCAT III 300 VCAT III 300 VCAT IV 600 V *Touch proof clipsCAT II 300 VCAT II 300 VCAT II 300 V**Touch proof clips reduce chance of causing arc flash over in live environmentsExternal voltage protection240 V ACTest inhibitWithout blowing a fuse600 V AC or DCTest inhibitWithout blowing a fuse600 V AC or DCTest inhibitWithout blowing a fuse600 V AC or DCTest inhibitWithout blowing a fuse600 V AC or DCTest inhibitWithout blowing a fuse600 V AC or DCTest inhibitWithout blowing a fuseParticulary important when testing in close vicinity of live voltageNoise immunity spec100 mV 50/60 Hz(Differential)100 mV 50/60 Hz(Differential)100 mV 50/60 Hz(Differential)100 mV 50/60 Hz(Differential)100 mV 50/60 Hz(Differential)5 V rms 50/60 Hz(common mode)5 V rms 50/60 Hz(common mode)5 V rms 50/60 Hz(common mode)Reflects instruments ability to work in electrically noise environments such as high voltage sub-stationsIP ratingIP65 closed IP54 openIP65 closed IP54 openIP65 closed IP54 openIP53IP53IP53High IP ratings ideal for outdoor operation Tough transport case housing■■■■Weight excluding leads4.5 kg (9.9 lbs)2.6 kg (5.7 lbs)2.6 kg (5.7 lbs)6.7 kg (14.77 lbs)6.7 kg (14.77 lbs)7.9 kg (18 lbs)14.5 kg (33 lbs)14.5 kg (33 lbs)14.5 kg (33 lbs)Weight excluding leadsDimensions245 x 344 x 158 mm (9.6 x 13.5 x 6.2 in)220 x 100 x 237 mm (8.66 x 3.9 x 9.3 in)220 x 100 x 237 mm (8.66 x 3.9 x 9.3 in)315 x 285 x 181 mm (12.4 x 11.2 x 7.1 in)315 x 285 x 181 mm (12.4 x 11.2 x 7.1 in)400 x 300 x 200 mm(16 x 12 x 7.9 in)410 x 250 x 270 mm(16 x 10 x 11 in)410 x 250 x 270 mm (16 x 10 x 11 in)410 x 250 x 270 mm(16 x 10 x 11 in)DimensionsProduct comparison chartwww.megger.com 4140 A guide to low resistance testing www.megger.com
