Buildup Detection (8/16 Ma Or 4 To 20 Ma Version) - Siemens SITRANS L Series Operating Instructions Manual

3.5

Buildup detection (8/16 mA or 4 to 20 mA version)

With the 4 to 20 mA setting, you can recognize material buildup on the fork using a PLC or
data logger. In this mode, the Diagnostic setting has no influence. The LED showing signal
output is off.
● 20 mA: The fork is clean.
● <20 mA and >12/12.5 mA: The vibration amplitude is decreased by the material buildup.
● <12/12.5 mA and >7/8 mA: This range indicates a weak vibration. The internal LED
showing diagnosis begins blinking to indicate a weak signal. If you are using a PLC to
evaluate the echo, delay the response time to this indicator for approximately 10
seconds. A hysteresis of 0.5 mA (between 12 and 12.5 mA) is recommended.
● 7/8 mA: This point indicates that the fork is mostly encrusted.
● 6 mA: This point indicates that the fork is fully encrusted.
With setting "high sensitivity"
①
②
SITRANS LVS100/200
Operating Instructions, 01/2019, A5E44839609-AA
Amplitude is 100%
Amplitude is 0%
3.5 Buildup detection (8/16 mA or 4 to 20 mA version)
With setting "low sensitivity"
③
Amplitude is 100%
④
Amplitude is 0%
Operating
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