Samson EB 2111 - Page 51

EB2111/2121/2123 EN 8-3
Malfunctions
Malfunction Possible reasons Recommended action
Temperature regulators for cooling applications·Type4u
Temperature at the
sensor does not reach
the set point
Foreign particles blocking the plug
Î Remove foreign particles.
Î Replace damaged parts.
Î ContactSAMSON'sAfter-salesService.
Seat and plug are worn or leak.
Î Replace the damaged seat and plug.
Î ContactSAMSON'sAfter-salesService.
Controlthermostatdefective Î Replace the control thermostat.
Regulator or K
VS
/C
V
coefcienttoolarge
Î Checkthesizing.
Î ChangeK
VS
/C
V
coefcient,ifnecessaryor
installadifferentsizedregulator.
Î ContactSAMSON'sAfter-salesService.
Sensor installed incorrectly.
Î Immerse the temperature sensor with its
entire immersion depth in the process
medium.
Î Avoid an installation site where idle times or
heat buildup can occur.
Sensor installed in the wrong location. Î Changethemountingposition.
Temperatureuctuates
Regulator or K
VS
/C
V
coefcienttoolarge
Î Checkthesizing.
Î ChangeK
VS
/C
V
coefcient,ifnecessaryor
installadifferentsizedregulator.
Î ContactSAMSON'sAfter-salesService.
Sensor installed incorrectly.
Î Immerse the temperature sensor with its
entire immersion depth in the process
medium.
Î Avoid an installation site where idle times or
heat buildup can occur.
Sensor installed in the wrong location. Î Changethemountingposition.
Slow control response
Time constant is too large for the control
loop
Î Fill the thermowell with thermal paste or
remove the thermowell.
Î ContactSAMSON'sAfter-salesService.
Sensor installed incorrectly.
Î Immerse the temperature sensor with its
entire immersion depth in the process
medium.
Î Avoid an installation site where idle times or
heat buildup can occur.