ZES ZIMMER LMG450, Руководство пользователя

Страница: 24 / 306

General LMG450
24
The LMG450 is suitable for measurements in electromagnetically noisy environments to
IEC61000-4. This feature is of particular importance for measurements in power electronics.
Other applications include the measurement of reactive and non-linear component losses (such
as in transformers, chokes, motors, capacitors, power supplies), the computation of the
efficiencies of photovoltaic modules and other alternative energy components. Further on you
can calculate energy and charge, e.g. of accumulators.
A further highlight are the special ZES ZIMMER current clamps. This unique accessories
combine both, the easy usage of clamp-on current transformers with the high accuracy of fix
installed current transformers with primary winding for small currents from 0.1A to 80A. They
are compensated for very small errors for amplitude and phase over frequency. So they can be
used in power measurement in a wide current and frequency range. With them you can
measure with power!! accuracies up to 0.3% in the frequency range 5Hz to 20kHz. So it is
possible to measure the output of a PWM inverter without interrupting the wires.
2.2 Usage of the manual
The LMG450 is operated either by pressing buttons with hard-wired functions (in the
following characterised by italic style), or by using softkeys (bold style) which will perform
tasks that depend on a particular menu choice. This approach makes it possible to call all
functions using a limited number of buttons without a need to call double or triple functions
with one button. There are no menu trees so that the user does not need to fight his way
through a menu jungle in order to call a particular display. Each menu can be called by simply
pressing a single button.
The upper 6 buttons of the numerical keypad (Default, Current, Voltage, Power, Int. Value
and Graph) enable the display of the standard measuring values by simply pressing a single
button. In this menu a specified selection of the respective measuring values can be displayed
using the soft keys.
The menus for the parameter set-up is called via the lower 6 buttons of the numerical keypad
(Measuring, Int. Time, Custom, Range, Misc., IF/IO,). Thereby, all the instrument parameters
can be adjusted using the soft keys.
Despite the simple and intuitive operation of the controls, it is recommended that even
experienced users should carefully read and work through this manual to eliminate
operational mistakes and to explore the full capability of the instrument.
There are following measuring modes:
•
normal mode
In this mode the LMG450 works as a power-meter with integrated scope function. The