A thermocouple is used to measure the temperature in a large vat. The vat is heated with a steam coil in the center. The thermocouple is contained in a thermowell in the side of the tank to protect it from the liquid.
One day an operator pours in 150 gallons of lime slurry. She then opens the steam valve to start heating the mixture. She watches the temperature gauge for 20 minutes, but it remains just above normal room temperature. She feels that the steam pipe is warm, so she figures that the steam is on.
Which of the following should she check next?
A)The concentration of the lime slurry
B)The connection from the thermocouple to the meter
C)If the thermowell is below the top of the slurry
D)If the vat is stirred properly