TEST LEADS L2140

Four-terminal test lead set for DC resistance measurements, red lead with pogo-pin probe (1.84 m) and black lead with large alligator clip (3.16 m, up to Ø 30 mm), for HIOKI RM3548-50

The L2140 test lead set is designed for DC four-terminal resistance measurements, originally developed for use with the HIOKI RM3548-50 portable resistance meter. It supports accurate measurements across widely spaced test points, such as during EV and hybrid vehicle maintenance, equipotential bonding tests, battery connection checks, motor winding inspections, or resistance verification on industrial motors, transformers, and power supply systems.
The red lead features a straight, spring-loaded pogo-pin probe tip (tip diameter Ø 2.9 mm) that provides stable contact on screws, busbars, or metallic terminals. The black lead is equipped with a large alligator clip that securely grips objects up to Ø 30 mm, allowing reliable connection to grounding points or wide conductors.
Each lead pair is configured for four-terminal measurement, with separate SOURCE and SENSE lines to minimize the influence of lead resistance and maintain measurement consistency even when measuring over longer distances. The leads are not physically joined, allowing flexible placement over several meters, which suits DC resistance measurement but not AC impedance testing, where parallel cable routing is required to reduce inductive effects.
Rated for 60 V DC, the L2140 provides a sufficient safety margin for precision DC resistance testing. Although originally designed for the RM3548-50, it is also compatible with the earlier HIOKI RM3548 and with other instruments featuring compatible connectors. Its long and flexible design also makes it suitable for test bench applications, for example with resistance meters such as the HIOKI RM3545A.
Technical Details:
-Type: Four-terminal test lead set, red/black
-Maximum rated voltage: 60 V DC
-Measurement type: DC resistance only (not suitable for AC impedance measurement)
-Red lead: 1.84 m, pogo-pin probe tip Ø 2.9 mm
-Black lead: 3.16 m, alligator clip for objects up to Ø 30 mm
-Contact pressure (pogo pin): Approx. 190 g initial, 250 g at 1 mm stroke
-Construction: Four-terminal configuration; red and black leads not physically joined
-Compatible instruments: HIOKI RM3548-50, RM3548, and other DC four-terminal resistance meters