114
SAW sensor - Parameter
Type 8098
13.9.7
Resetting the default values of all the acoustic transmission
factor parameters
To reset all the default values of all the acoustic transmission factor parameters, do the following:
→
Select the device in the navigation area.
→
SAW sensor
→
Parameter
→
Add. meas. values
→
Acoustic transmission factor
→
Reset to default
→
Finish
All the acoustic transmission factor parameters are reset.
13.10
Diagnostics: monitoring special events in the
process, on the sensor or on the electronics
The device can inform that a special event occurs in the process, on the sensor or on the electronics*) of
the device. It can also be set to normal operation for each event.
The possible events are listed in Table 11, Table 12. and Table 13
→
To be informed if a special event occurs in the process, on the sensor or on the electronics*), configure
the diagnostics as shown in the flowchart in Figure 24
You can be informed through the colour of the status indicator and/or through a message and/or through
one or several outputs*) as shown in the flowcharts in Figure 25
*
)
Only variant with outputs.
Special event in the process:
Special event in the process Meaning
Special condition
Not totally filled
The tube is not totally filled.
If the parameter
Refresh time
is set
to
Very short
, the event
Not totally
filled
cannot be monitored.
Not all the sensors are in contact
with the liquid.
Liquid out of range
The speed of sound in the liquid is out
of range.
DN08, 3/8'', 1/2'': The speed
of sound in the liquid is lower
than 1000 m/s or higher than
2000 m/s.
DN15 and above, 3/4'' and above:
The speed of sound in the liquid
is lower than 800 m/s or higher
than 2300 m/s.
Unstable flow
The flow rate is not stable.
The standard deviation of the flow
rate measurements is too high.
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