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BCS6000C-9
APPENDIX H: MATERIAL THERMOCOUPLE INSTALLATION
Install a Hauck Rapid Response Material Temperature Thermocouple in the material discharge
chute to sense the temperature of the material leaving the dryer as shown Figure 1. Wire the
thermocouple to the proper terminals in the panel.
Figure 1. Installation of Thermocouple and “Dam” Dryer Discharge Chute
IMPORTANT
A small clearance of 1" (25mm) maximum should be provided under the
thermocouple so material will not be trapped between the thermocouple and the
chute. Trapped material will cause a heat loss path and the thermocouple will give
erroneous readings.
The thermocouple should make good contact with the material but not be subject to
severe abrasion caused by high velocities. If the material is moving so fast that it
bounces and leaves air adjacent to the thermocouple, the temperature it senses will
be lower than the material. It may be necessary to place a dam in the chute so that
the thermocouple is in a relatively slow moving area next to the dam. The dam must
only be wide enough and high enough to create a localized area of build-up where
the material loses velocity but does not stop flowing. The thermocouple must not
be located in a stagnant zone or erroneous temperature reading will result. Because
of the large number of variables involved, it is impossible to set down any exact size
or location of the dam that will always work. Field experimentation will be necessary if
good results are to be obtained. It is advisable to tack weld the dam in place so that it
can be easily modified if it fails to perform satisfactorily.
X7618
(NOT TO SCALE)
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