ZES ZIMMER LMG450, Руководство пользователя

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Instrument controls LMG450
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Example: You select ‘Utrms:1 < 200V’. Now you get an alarm for every voltage smaller
than 200V. The output becomes a high impedance state because a ‘fail save’ function is
assumed.
Figure 21: Limit menu
Pressing the rotary knob returns you to the tab selection.
Fail Save Principle
The fail save principle should offer you highest safety in critical applications. The principle is,
that a high impedance state is the alarm (active) state. By this also broken or not connected
wires as well as not switched on instruments are recognized as fail. Only the low impedance
state is recognized as no alarm (deactive).
4.4.2.3 Options key
If you press on the softkey with the key symbol you get an actual software key which
represents all installed options in your instrument. Some options of the instrument are software
options which can be released by another key. If you for example want to install the 100
Harmonics you send us or your local sales company an order about this option together with
your Current Option Key and with your serial number (SN).
Then you get back a second key which you can enter after pressing the key symbol. If the
second key is correct, the option is installed.
Note
If you can access the instrument via an interface, you can use LMG-CONTROL to read out
and update the key. This is much easier than working with the front panel.