Troubleshooting/FAQs
8.3 Step 2: Improving the application
SITRANS FCS200
28 Operating Instructions, 02/2011, A5E02508199-01
8.3 Step 2: Improving the application
Incorrect installation of the sensor
Especially for low flow rates, i.e. flow rates less than 10% of the maximum capacity of the
flowmeter, it is important that the sensor is correctly and stably installed.
If the sensor is not correctly fixed in place, the zero point of the sensor will move, leading to
measuring errors.
1. Secure that the sensor has been installed and fixed to a solid vibration free foundation or
frame.
2. Tighten the sensor brackets in order to stabilize the flow.
Vibrations and cross talk
Vibrations in the pipe system are normally generated by pumps.
Typically, cross talk is generated by two sensors positioned in close proximity in the same
pipe, or installed on the same rail or frame.
1. Set Low Flow Cut-Off to zero %
2. Turn off any pump to see if the zero point stability improves, i.e. if the flow rate fluctuation
in kg/h is reduced.
If the sensor is disturbed by vibration from a pump, the installation should be improved or
the pump replaced.
3. Check for cross talk.
Turn off the power to the other flowmeter(s) and wait approximately 2 minutes. Then
check if the zero point stability has improved, i.e. that the fluctuation in kg/h has been
reduced. If this is the case, the sensors disturb each another and the installation should
be improved.
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