# Project Process control problem

**URL:** <https://forumautomation.com/t/project-process-control-problem/317>\
**Category:** ABB\
**Created:** [March 16, 2015, 9:34am UTC](https://forumautomation.com/t/project-process-control-problem/317 "2015-03-16T09:34:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![GlennAvans](https://forumautomation.com/letter_avatar_proxy/v4/letter/g/dc4da7/32.png) [@GlennAvans](https://forumautomation.com/u/GlennAvans)\
**Post date:** [March 16, 2015, 9:34am UTC](https://forumautomation.com/t/project-process-control-problem/317/1 "2015-03-16T09:34:27Z")

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Dear readers I will introduce our project first.

It’s a project that contains 2 water tanks, 1 pump, 2 valves, pressure tank, heater, pipes with manual valves and sensors. With the help of matLab SimuLink we try to make the ideal control for this system, However we are having a problem with the heating sensor located in the second tank. It is a Siemens 7mc1006 and the analog input is fluctuating by +/- 1000, What could be causing the problem?

We are open for comments and answers.

Kind of regards,

Team B, Avans

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**Author:** ![Sensor](https://forumautomation.com/letter_avatar_proxy/v4/letter/s/c68b51/32.png) [@Sensor](https://forumautomation.com/u/Sensor)\
**Post date:** [March 20, 2015, 8:43am UTC](https://forumautomation.com/t/project-process-control-problem/317/2 "2015-03-20T08:43:23Z")

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Hi GlennAvans,

I’ve read your problem and I thought of a solution, Can you measure the Voltage of the sensor, If the Voltage stays stable then you know the sensor isn’t broken.

Kind of regards,

Sensor