Megger BT51 Milliohmmeter

High test current, four-terminal, low resistance ohmmeter suitable for field and precision laboratory applications.

Features

  • 2A nominal test current with limiting circuit
  • ±1% ±2 digits accuracy (32 to 122°F)
  • Two measuring ranges:
    • 2000mΩ with 1mΩ resolution
    • 20.00mΩ with 0.01mΩ resolution
  • Relay protection circuit (effective up to 240VAC)
    • Effective whether instrument is on or off
    • Protection from inadvertent supply connection
  • Weatherproof and shockproof portable case
  • Hinged detachable lid
  • Can be used with very long test leads
  • Meets safety requirements for IEC 610101-1
  • EMC in accordance with IEC61326-1

What's in the Box

  • 4 Ah NiCd rechargeable battery
  • Supply lead for charging battery
  • Duplex handspikes with 8ft test leads
  • Operating instruction book
  • DH1-C 2-wire, 4-terminal duplex twist probe lead set

The Megger BT51 Milliohmmeter takes measurements by passing a current through two terminals on the conductor as well as monitoring the voltage across it. This measurement is ratiometric, meaning it is unaffected by current variations. The BT51 uses the four-terminal method of measurement. The main advantage of this method is that the resistance of the test leads is not included in the measurement, which is important when the resistance is very low.

This meter has a 3 1/2 digit LED display to facilitate use in low light levels. Two LEDs on the front panel indicate battery condition and whether test current is flowing when a measurement is being made. A red warning light indicates the presence of a dangerous voltage if the test leads are accidentally placed across a live circuit. This warning takes place whether or not the instrument has been switched on.

Megger BT51 Milliohmmeter Applications

  • Measure the resistance of metalwork bonding on large frames, structures, & aircraft
  • Earth bond testing
  • Able bond testing
  • Measure the resistance of lightning conductors
  • Check bus bar continuity
  • Check the resistance between metal points on the aircraft structure
Megger 242021 Test Lead Set
Megger 242021 Test Lead Set

Potential test lead hand spikes.

Starting at $745.00
Megger DH5 Duplex Hand Spikes
Megger DH5 Duplex Hand Spikes

Two straight duplex handspikes with spring loaded tips and 8ft (2.5m) cables.

$715.00
Megger Replaceable Needle Points
Megger Replaceable Needle Points

Max test current, 7ft in length.

$1,465.00
Megger 242002 Test Lead Set
Megger 242002 Test Lead Set

Spacing between P and C probe tips 0.35in, Max test current 10A.

Starting at $1,190.00
Megger 241005 / 242005 Test Lead Set
Megger 241005 / 242005 Test Lead Set

Kelvin clips 0.5in (1.3cm), gold plate or silver plate options, 7ft of cable.

Starting at $320.00
Megger 242006 Test Lead Set
Megger 242006 Test Lead Set

Kelvin clips 1.5in (4cm), Max test current 10A.

Starting at $555.00
Megger 242004 Test Lead Set
Megger 242004 Test Lead Set

Clamp capacity 2in, Max test current 10Aanvil insulated from the clamp.

Starting at $870.00
Megger 242041 Test Lead Set
Megger 242041 Test Lead Set

Current test lead terminal clips, Max test current 10A.

Starting at $745.00
Megger 1008-020 Pouch
Megger 1008-020 Pouch

Accessory pouch for BT51 or DET2/2.

$95.00
Megger Duplex Probes With Interchangeable Terminations
Megger Duplex Probes With Interchangeable Terminations

Single probe for use with Megger DLRO & BT51 interchangeable connector lead set.

Starting at $114.00
Megger Interchangeable Duplex Test Leads
Megger Interchangeable Duplex Test Leads

Single lead for use with Megger DLRO & BT51 interchangeable connector lead set.

Starting at $91.00
Megger BT51 Duplex Interchangeable Connector Lead Set
Megger BT51 Duplex Interchangeable Connector Lead Set

Test lead system with the option for interchangeable terminations to allow ends to be changed instead of switching entire lead set .

Starting at $310.00
Megger DH1-C Duplex Handspike
Megger DH1-C Duplex Handspike

DH1-C 3m Connect Duplex Handspike (x2) Complete Duplex Lead Set.

$505.00