Mercoid Series DA Operating Options

Fully Automatic, Double Adjustments

Equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure operating point. Deadband, or the difference between high and low set points, is adjustable over full scale. Mercoid's most popular operating mode, available on most Series D pressure and temperature controls.

Fully Automatic, Single Adjustment

Equipped with single adjustment for setting operating point only. A single pointer on scale sets pressure point at which switch action occurs. Fixed deadband is factory set and cannot be altered in the field. Furnished standard for Series D-200 and D-7200, also available on Series D-20, D-30, D-35, D-40, D-80, D-500, and D-900 pressure and temperature controls.

Manual Reset, Single Adjustment

Equipped with a single adjustment for setting operating point to operate the circuit automatically upon a pressure increase or decrease. Push button reset must be operated manually to restore the circuit to original position after automatic operation. Suffix "L" denotes control will operate automatically on increase; suffix "U" denotes control will operate automatically on decrease. Available on Series D-20, D-30, D-35, D-40, D-80, D-500, D-900, and D-7000 pressure and temperature controls.

Manual Lock Reset, Single Adjustment

Equipped with a single adjustment for setting operating point. Control will operate at set point only upon a decrease in pressure. Manual lock feature permits circuit to be reset and locked in position. Lock remains in effect until pressure rises above control setting. Lock then releases and circuit is held in reset position until further automatic operation upon pressure decrease. Available on Series D-20, D-30, D-35, D-40, D-80, and D-900 pressure and temperature controls.