Glossary of Terms VIII

Question 1

Humidistat

Answer 1

An electrical control that is actuated on change if humidity.

Question 2

Pneumatic Controls

Answer 2

Control devices operated by low pressure air (18-20 PSIG)

Question 3

Pressurestat

Answer 3

A switch operated by a change in pressure.

Question 4

Offset (Deviation)

Answer 4

Difference between set point and control point.

Question 5

Set Point

Answer 5

The control setting of the temperature or pressure that is desired to be maintained.

Question 6

Bimetal Strip

Answer 6

Two dissimilar metals of unequal expansion rates that are welding together and expand or contract with a change in temperature.

Question 7

Cooling Compensator

Answer 7

A small fixed resistor heating element wired parallel to a thermostat that operates during the off-cycle causing cooling equipment to turn on sooner to prevent overshoot due to system lag.

Question 8

Cut-In

Answer 8

Temperature or pressure at which the control circuit closes

Question 9

Cut-Out

Answer 9

Temperature or pressure at which the control circuit opens.

Question 10

Dead Band

Answer 10

The point of a control that nothing happens which occurs when the set temperature or pressure is maintained or satisfied.