Schmalz SCPi FS RP, Руководство по эксплуатации

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Functions of the Vacuum Switch
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Pressure p
[mbar]
Time t
Switching point SP
Reset point rP
Output NO
Output NC
8.3.3 Window Mode
In window mode, the switching point is active when the measurement value is between the upper win-
dow point FHx and the lower window point FLx. Outside this window, the switching point is inactive. If
necessary, a common switching hysteresis Hyx can be set, which symmetrically applies to both window
points. For the parameters of the upper window point FHx, lower window point FLx and hysteresis Hyx,
the following must always apply: |FHx| > |FLx| + Hyx
Pressure p
[mbar]
Switching point FH
Switching point FL
Output NO
Output NC
Time t
Hysteresis
Hysteresis
}
}
When switching from two-point mode to window mode, the current switching points SPx and
rPx are interpreted as window points FHx and FLx. They are the same internal parameters (also
see the data dictionary). If the resulting set of parameters are not valid in the new mode (e.g.
hysteresis too big in window mode), it is not possible to switch the mode because the differ-
ence must be at least 30 mbar.
8.3.4 Condition Monitoring Mode (Leakage Measurement)
The condition monitoring switching point mode is used to monitor the quality of a vacuum suction sys-
tem. In this case, the vacuum switch can measure the vacuum leakage in millibars per second between
two drainage cycles. The switching point is then activated when a leakage exceeds its maximum permissi-
ble setting, which can be configured.