Datasheet

8
Protection functions to safeguard instrument and
DUT
The R&S®NGM200 power supplies provide protection
functions to make sure the DUT and the power supply
are not damaged in the event of a fault. The output
channels are protected against overload and short circuits.
The maximum voltage, current and power can be set
separately for each channel. When a channel reaches the
set limit, it is automatically switched off and a message is
displayed.
Overvoltage protection (OVP)
If the voltage exceeds the configured maximum value,
the channel is switched off and the corresponding symbol
flashes on the display.
Overcurrent protection (electronic fuse, OCP)
To better protect sensitive loads, the channels of
R&S®NGM200 power supplies provide electronic fuses
that can be set individually. If the channel current exceeds
the set current, the channel is automatically switched off
and the overcurrent symbol flashes.
In the two-channel R&S®NGM202, the electronic fuse can
be linked to the other channel (FuseLink function). Then
both channels are switched off as soon as the selected
channel reaches the maximum current value.
Electronic fuse with additional functions: “Fuse delay at output-on”
specifies how long the fuse remains inactive after the channel is activated.
The sensitivity of the fuse is specified using the “Fuse delay time”.
There are two settings to define the response behavior
of the electronic fuses. The “Fuse delay at output-on”
specifies how long the fuse remains inactive after the
channel is activated. The sensitivity of the fuse is specified
using the “Fuse delay time”. This allows users to modify
the behavior of the power supply to prevent a channel
from being switched off due to a short current spike dur-
ing operation.
Overpower protection (OPP)
Alternatively, instead of the maximum voltage, the
maximum power can be set and used as the switch-off
parameter.
Overtemperature protection (OTP)
The R&S®NGM200 power supplies have internal overtem-
perature protection that switches the power supply off if a
thermal overload is imminent.
Safety limits to safeguard the DUT
To prevent a DUT from being destroyed by a too high
voltage, safety limits can be set on the R&S®NGM200
power supplies. Before starting the actual measuring task,
the user can limit the power supply to values that are not
dangerous for the DUT.
The user can set safety limits to limit the adjustment range of the power
supply and prevent a DUT from being damaged due to accidentally using
the wrong setting.
NGM200_dat_en_3609-1685-32_v0100.indd 8 22.05.2019 11:54:16