• High or low output power selection for condition diagnosis
• Rechargeable battery or line power supply, continuous operation, even with dead battery
• 10 A for 60 seconds, less time waiting to cool, great for charging inductance
• High input protection to 600 V, inadvertent connection to line or UPS voltage will not blow a fuse
• Heavy duty case: IP 65 lid closed, IP54 operational (battery operation only)
• Rotary switch selects one of five test modes, including auto start on connection, giving ease of use

Equally at home in the laboratory, the workshop or in the field, on the bench or on the ground, Megger’s new heavy duty DLRO10HD low resistance ohmmeter combines rugged construction with accuracy and ease of use. It features an internal rechargeable battery and can also operate from a mains supply, even if the battery is completely flat.

• Rugged case well suited for transportation and includes a lead set pouch
• Removable lid facilitates easy test lead connection
• Operational ingress protection is IP54 (battery power only) ensuring protection from the elements
• 7Ah lead acid battery provides extended operation and can be charged whilst operating from line power
• Rotary mode switch with bidirectional (current reversal with averaging cancels thermal EMFs), unidirectional, automatic, continuous and inductive modes
• Large, clear LCD display with backlight and contrast adjustment
• Auto power off function conserves battery

  APPLICATIONS
  The DLRO10HD measures low resistance values in applications ranging from railways and aircraft to resistance of components in industry.
  Any metallic joint can be measured but users must be aware of measurement limitations depending on application. For example, if a cable manufacturer plans to make resistive measurements on a thin wire, a low test current should be selected to prevent heating the wire thereby changing its resistance.
  Measurements on electric motors and generators will be inductive and require the user to understand the inductive mode and charging process before a correct result is achieved. The DLRO10HD is well suited to measuring thick conductors, bonds and quality of welding because of its 10 A range for resistance values up to 250 mΩ. Electromagnetic noise induced into the leads can interfere with a reading. A noise symbol alerts the user and prevents a measurement when the instrument detects noise above its threshold.
  When dissimilar metals are joined a thermocouple effect is created. Users should select a bidirectional mode to ensure cancellation of this effect. The instrument measures with current flowing in both directions and averages the result. Normal mode is initiated by pressing the ‘Test’ button after connecting the test leads to the unit under test. Continuity of all four connections is checked. Current is applied in both forward and reverse direction following which measurement is displayed. Automatic mode is started as soon as the probes make contact. Forward and reverse current measurements are made and the average value is displayed. This mode is ideal when working with the supplied DH4 handspikes. Each time the probes are removed and reconnected to the load a new test will be performed without the need to press the test button

  SPECIFICATIONS
  Temperature Coefficient: < 0.01% per º C, from 5º C to 40º C
  Maximum Altitude: 2000m (6562 ft) to full safety specifications
  Display size/type:
  Main 5 digit + 2 x 5 digit secondary displays
  Battery type: 6 V, 7Ah sealed lead acid
  Voltage input range: 90 - 264 V, 50-60 Hz
  Charge time: 8 hours
  Backlight: LED backlight
  Battery life: 1000 Auto (3 sec) tests
  Auto power down: 300s
  Mode Selection: Rotary switch
  Range selection: Rotary switch
  Weight: 6.7 kg
  Case dimensions: L315mm x W285mm x H181mm
  Pouch for test leads: Yes (lid mounted)

  Specifications