Megger INGVAR, User Manual

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BH0654BE ZP-BH05E 37
7 HOW TO USE INGVAR
7.6 Setting stop conditions
The status lamp adjacent to the connection sockets is
lit:
In the voltage mode — if voltage is present.
In the contact mode — if the contact is closed.
When the preset stop condition is met the LATCH
lamp is lit. Resetting takes place automatically when
you start a new generation or when you press the
RESET
button.
You can set the stop condition in a number of differ-
ent ways. You can use the following combinations:
Closing of an external
contact.
Opening of an external
contact.
Opening or closing of an
external contact.
Application of a voltage.
Interruption of a voltage.
Application or interruption
of a voltage.
7.7 Getting maximum
current from INGVAR
Maximum output current is limited by the following:
▪
Impedance of the object being tested.
▪
Impedance of the current cables.
▪
Mains supply.
▪
Voltage drop in mains cables and other cables.
▪
INGVAR’s internal impedance
To obtain maximum current from INGVAR proceed as
follows:
A]
Connect the Current Unit in parallel.
B]
If the object being tested has high imped-
ance, connect the Current Unit in series.
C]
If the object being tested has low impedance,
connect the Current unit in parallel.
D]
Use short, heavy-gauge (thick) cables and
twisted cables, see fig 6.2.
E]
Make certain that the object being tested is
connected properly (all connectors must be
clean, connected at the right places etc.).