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3.5 Nova Functions which are independent of Head
Type
When no head is connected to the Nova and it is
turned on, the message "Head Disconnected" appears.
In this mode, the user can adjust either the power line
frequency so the instrument can be adjusted for
minimum interference at the power line frequency, or
the user can zero the instrument to eliminate any
offsets.
3.5.1 Line Frequency
The Nova is factory set for 50 Hz. If your country uses
60 Hz you must reset the line frequency.
To reset the line frequency:
1. Turn on the Nova while the head is disconnected.
2. Press "select" until "line frequency" is highlighted.
3. Press "go" then change to select the correct line
frequency.
4. Press "exit" to save the new value and exit.
3.5.2 Zero Adjustments
In the Nova, all adjustments, including zeroing internal
circuits, are done from the software. This ensures
simple and accurate realignment. It is recommended
to rezero the Nova every 2 months for best
performance. The simple zeroing procedure follows.
1. If a head is connected, disconnect the head, turn
off the instrument then back on again so the Nova
can identify that no head is connected. "Head
Disconnected" will be displayed.
2. Turn on the Nova, and let it run for at least 30
seconds before performing zero adjustment.
3. Press "go".
4. Make sure the instrument is not in an electrically
noisy environment and is undisturbed. Press "go"
and wait for message, "zeroing completed". Now
press "exit" and "saved" will be exhibited, indicating
that the zero configuration has been saved.
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