General Description - Megger DUCTER DLRO 10X Bedienungsanleitung

General Description

The DUCTER DLRO 10 and DUCTER DLRO 10X make up a family of low resistance ohmmeters that measure resistances in the
range from 0.1 µΩ to 2 kΩ. Both instruments provide a maximum test current of 10 Amps d.c. which is automatically selected according
to the value of resistance being tested. The DLRO10X allows you to override this automatic selection and select your own test current.
The measured value of resistance is output to the instrument display with indication of the units, µΩ, mΩ or Ω. The DLRO 10 uses a
large LED display and indicators to display the value and units respectively, while the DLRO 10X contains all the information on a clear
backlit LCD display.
The use of a four terminal measurement technique removes the test lead resistance from the measured value and auto current reversal
eliminates the effect of standing voltages across the test sample. Additionally, before and during a test, test lead contact is monitored
to further reduce the chance of erroneous readings.
A resistance measurement takes approximately 2.5 seconds and comprises a measurement with forward current, reverse current and
a display of the average. On the DLRO 10X all three values are displayed, and optionally, the measurement may be limited to forward
current only.
The instrument is powered by a rechargeable Nickel Metal Hydride (NiMH) battery, which permits one thousand 10 Amp tests to be
completed on a single charge. The battery module contains intelligent circuitry, which prevents damage to the battery from
overcharging, and a battery state indicator. A removable lid that is hinged at the back and held closed by magnetic catches covers the
top panel. This lid may be removed if required by opening fully and snapping out of its hinges.
Both instruments are protected against accidental connection to external voltages up to 600 V d.c. applied between any pair of the
four terminals for up to 10 seconds. Please note that applying 600 V to the potential terminals will cause some internal heating. Expect
errors of up to 30 digits immediately after the application of such voltage. Full accuracy will be restored within two to three minutes
Both instruments are supplied complete with a pair of DH4 Duplex Handspikes with 1.2 m leads. Other lengths and terminations are
available if required.
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