Futek LSB200 Manual Download Page 5

INCORRECT OUTPUT

If the output of the sensor is incorrect when applying a known load, check the following points to troubleshoot the sensor.

Is there any sign of damage to the load cell?

Any damage to the load cell can lead to an incorrect output or even 
no output at all. Carefully check the load cell to make sure no 
damage has been done. Examples of possible ways the load cell 
can be damaged are listed here:
• Overloading 

• Fractures 

• Collapsed

Is the cover making contact with the load cell?

If the cover is touching the active end of the load cell, it could affect 
the accuracy of the output. The active end of the load cell is defined 
as the end where the load is applied, or the top in reference to the 
label (see installation guide). Make sure the cover is not pinched in 
or making any contact with the inside of the load cell.

Is the sensor hot?

An excessively high excitation voltage will heat up the sensor. This 
may damage the sensor’s bridge. Check the excitation voltage to 
make sure it is set properly.

Is the bridge resistance correct?

Check the resistance bE and –E to make sure it is correct 
compared to the value on the infosheet. 

http://www.futek.com/

files/pdf/Product%20Drawings/lsb200.pdf

Have any of the settings on the instrument changed?

Check the instrument that the load cell is connected to, to make 
sure the settings have been set correctly and nothing has been 
changed unintentionally.

Has there been any power surge to the instrument?

A power surge to the instrument may damage it leading to incorrect 
readings of the signal from the load cell.

Has the load cell been subjected to any type of water or spray?

If the load cell has been in contact with any conductive fluids, the 
bridge may be subject to short circuiting. Make sure to work in a dry 
environment to prevent short circuiting.

Is the load cell in a dusty or harsh environment?

If the load cell is being used in dirty or harsh environments, there 
could be residual build up on the load cell or in the overload 
protection cutout that may prevent the load cell from being loaded 
properly. Keep the load cell in a clean environment for optimal 
performance.

Has the load cell been subjected to a high change 
in temperature?

The LSB200 has a temp. shift zero of ±0.01% of R.O./°F, and a 
temp. shift span of ±0.02% of Load/°F. If the temperature in the 
testing environment has a high fluctuation, this may lead to unstable 
readings. To get stable readings, keep the load cell in an environ-
ment with a steady temperature.

Is the load cell properly aligned/mounted to the fixture?

Misaligning the load cell can cause an off center load. For accurate 
readings, make sure the load cell is properly mounted.

Has the sensor been damaged during installation or handling?

Make sure to follow the installation guide to prevent any damage to 
the sensor. Also make sure to handle the sensor with care. The lower 
the capacity, the more susceptible the sensor is to being damaged.

A D V A N C E D   S E N S O R   T E C H N O L O G Y ,   I N C .

FUTEK

ADVANCED SENSOR TECHNOLOGY, INC.

LSB200 MANUAL

www.futek.com

10 Thomas, Irvine, CA 92618 USA · (949) 465-0900

EM1007  ·  5

TROUBLESHOOTING GUIDE

Via Paolo Uccello 4  -  20148 Milano   

Tel +39 02 48 009 757   Fax +39 02 48 002 070      [email protected]   www.dspmindustria.it

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