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Gossen Metrawatt MAVOWATT 4 Manual

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8 GMC-I Messtechnik GmbH
3.4 Battery test
To test the battery for the voltage path and the battery for the cur-
rent path, set the function switch to the positions " 1" and "
2", one after another. When, at a time, the pointer is within the bat-
tery section marked " " on the scale, the battery voltages are
within the permissible range.
It is assured that the error limits according to the data given in
chapter 5 „Specifications“ are maintained.
4 Measurement
4.1 Notes on measurements
Prior to connecting the meter, check according to which of the cir-
cuitries shown in the following section the MAVOWATT 4 is to be
connected.
Find out whether direct connection of current path and voltage
path is possible on the basis of the system on which the measure-
ments are to be made and with respect to the power to be mea-
sured.
Caution: In systems having a voltage of more than 600 V,
measurements must, on principle, only be made via
current and voltage transformers!
The nominal currents and nominal voltages of the meters correspond
to those of commercial current transformers with secondary currents
of 1 A and 5 A, and the standardized voltage transformers with sec-
ondary voltages of 100 V or 110 V.
When using current transformers, consider the secondary load.
Particularly with longer connection leads and with a transformer
having a secondary current of 5 A, the power loss on the lines is
often remarkable.
Set up the current path mechanically solid and secure it against
accidental opening. Lay out the cross sections of the leads and the
connection points in such a way that they will not heat-up unper-
missibly. For currents above 5 A, the connections must always be
made as screw connections (e.g. with cable lugs), but not as plug
connections.
!
… 8 …


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