Rion VM-56, Instruction Manual, Page: 76 / 180

64
Comparator
The comparator function compares the PPV (peak particle velocity) of the
signal from the vibration pickup to a limit value that has been set previously.
When the signal is equal to or higher than the limit value, an output (open
collector circuit, LCD indication) is activated.
The comparator output is inactive during output calibration and while using
a menu or the recall function. On the current screen, the function is always
active, including during measurement, in measurement standby, and while
not performing measurement (including pause mode).
During warm-up, in sleep mode, and while returning from sleep mode, the
function is not active.
• Node Number
Specifi es the number of polygonal line sections for setup.
• Limit Node
Specifi es the PPV (0.05 mm/s to 100.00 mm/s) and Frequency (0.5
Hz to 315.0 Hz) parameters.
The range processed by the comparator extends from the frequency
set for the lowest node to that of the highest node.
Excessive values detected outside this frequency range do not trigger
comparator operation.
Frequencies lower than the frequency set for the lowest node cannot
be specifi ed.