Chapter 1 — Introduction
Page 4
September 2004
Optional Rigid Carrying Case
To carry or transport the DWR-10 safely, the instrument
is also available in an injection-molded case with rigid
reinforced walls.
An extendable handle and 3-inch wheels make
maneuvering easy.
Layered foam filling protects the instrument from the
impacts of everyday travel. The silicone o-ring seal
protects the DWR-10 from salt air, water, sand, and dust.
Custom Lead Lengths
Test leads are also available in longer lengths of 12 m
(40 ft) or 15 m (50 ft).
Optional 'T' Version
The DWR-10 is available in an optional 'T' version. In
this model, measurements can be taken automatically at
set intervals, and the date and time of the winding
resistance measurement is also recorded.
The interval measurements are stored in a single file, as
opposed to multiple files for the standard DWR-10 model.
Operating Principles
DC resistance of windings is measured by passing DC
current through the unknown resistance, and measuring
the resulting voltage drop The DWR-10 calculates the
resistance by the formula
R=E/I
Measuring small DC resistance in a highly inductive
environment can be a challenging task. The voltage across
an inductor is defined by the formula
V = L di/dt
. Some
All manuals and user guides at all-guides.com