Catalog > Test and Measurement > Test and Measurement Instruments > Special Function Testers > Miscellaneous Testers Catalog > Test and Measurement > Test and Measurement Instruments > Major Tech Instruments Major Tech Earth Loop Impedance and PSC Tester Digital Loop Impedance Tester MAJ K4140 Digital Loop Impedance, PFC and PSC Tester Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview The K4140 incorporates Anti-Trip Technology (ATT) which electronically bypasses RCDs when performing loop impedance tests. This saves time and money by not having to take the RCD out of the circuit when testing and is a safer procedure to follow. With the ATT function enabled, a test current of 15mA or less is applied between Line & Earth. It enables resolution loop impedance measurements (up to 0.01 ohm), without tripping RCDs rated at 30mA and above. A full set of new safety test leads are included, they have an overmould for maximum grip and are extremely robust. The instrument also comes in a soft carry case, a quick reference guide locates on the instrument body, a soft strap belt and is supplied with a calibration certificate. Features Phase RotationAnti-Trip Technology for complete trip free Loop testing on all RCD's rated 30mA and aboveDual display allows simultaneous measurements like Loop & PFC/PSC.Two wire connections for Loop L-L, L-N and PSC testing is possible.Phase rotation, voltage and frequency measurements.Lock-down test button for “hands free” testing with auto-start operation.Display and front panel keyboards with backlight to be visible in dark places.Water and dustproof (IP54). Specifications Rated voltageL-PE ATT OFF : 230V (50/60Hz)L-N : 230V (50/60Hz)L-L : 400V (50/60Hz)Operating VoltageL-PE ATT OFF : 100~280V (45~65Hz)L-N/L-L 100~500V (45~65Hz)Range (Auto-Ranging)L-PE ATT OFF : 20/200/2000ΩL-N/L-L : 20ΩNominal Test Current at 0W External Loop: Magnitude/Duration at 230V20Ω :6A/40ms L-PE ATT OFF200Ω :2A/20ms L-PE ATT OFF, 20W:6A/20ms (L-N/L-L)2000Ω :15mA/500ms L-PE ATT OFFAccuracyL-PE ATT OFF : ±3%rdg±4dgtL-N : ±3%rdg±4dgtL-L : ±3%rdg±8dgtPFC(L-PE)/PSC(L-N/L-L) (2)Function : 230V (50/60Hz), L-N : 230V (50/60Hz)Rated voltage : L-L: 400V (50/60Hz)100~280V (45~65Hz), 100~500V(45~65Hz)Operating Voltage2000A/20kA (L-PE ATT OFF)2000A/20kA (L-N/L-L)Range (Auto Ranging) : 20Ω :6A/40msNominal Test Current at 0W External Loop20W : 6A/20ms200Ω : 2A/20msMagnitude/Duration at 230V : 2000 :15mA/500msPhase RotationOperating Voltage : 50~500V, 45~65HzRemarksCorrect phase sequence : displayed "1.2.3" and markReversed phase sequence : displayed "3.2.1" and markVoltsMeasuring range : 0~500V, 45~65HzAccuracy : ±2%rdg±4dgt(L-PE ATT OFF), ±0.5%rdg±2dgt(L-N/L-L) Downloads Datasheet - MAJ K4140 PDF File 657.02 KB Manual - MAJ K4140 PDF File 768.41 KB