Burkert Flowave 8098, Operating Instructions Manual

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SAW sensor – Parameter
Type 8098 FLOWave L
15.13.7 Activating the monitoring of the acoustic transmission factor
To be informed when the concentration of gas bubbles or solid particles changes in the liquid, monitor the
acoustic transmission factor.
A monitored value can be:
• in the normal operating range.
• in the warning range,
• in the error range.
You can set 4 limit values: 2 error limits and 2 warning limits.
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To set the limit values, see chapter 15.13.6 Changing the error limits, the warning limits and the hys -
teresis of the acoustic transmission factor.
Fig. 52 in 15.4.5 explains how the device reacts when the monitored value enters in another range (for
example, from the normal range into the warning range). The reaction time depends on the hysteresis value
and if the monitored value increases or decreases.
By default, the monitoring of the acoustic transmission factor and the diagnostics are all disabled.
To activate the monitoring of the acoustic transmission factor, do the following:
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Go to the CONFIGURATION view.
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SAW sensor
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Confirm to access the Parameter view.
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Add. meas. values
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Acoustic transmission factor
→
Limits
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Active
→
Yes .
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Save.
The monitoring of the acoustic transmission factor is active and the device status will change depending
on the limits that have been set.
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You can configure the behaviour of an analogue output depending on the status of the device. See
chapter 18.3.3 .
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You can configure a digital output to switch every time a specific event is generated. See chapter 18.5.1
Configuring a digital output as an on/off output .
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To enable the monitoring, i.e. to be informed when the value of the acoustic transmission factor is
outside the normal range, enable the diagnostics. See chapter 12.10 Activating the diagnostics function .
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