Page 230 of Propane and Natural Gas Equipment by National Energy Equipment, Inc.

CANADAS LEADER IN ENERGY PRODUCTS EQUIPMENT  MAXITROL MODULATING SYSTEMS Maxitrols M Series Programmable Temperature Controller provides a higher level of functionality for our Selectra electronic gas modulation systems. The microprocessor logic gives you a digital option, a next-generation upgrade from our popular series of analog controls. Features include MPU logic, four set points, user-programmable ramping function, and nonvolatile memory. This microprocessor-based control is designed and built by Maxitrol and its Paktronics Division custom engineered for integral compatibility with other Selectra system components, such as the modulator or modulator-regulator (M/MR) valve. Selectra systems maintain stable, precise temperatures. The superior alternative to mod motors and butterfly valves M/MR valves provide instantaneous response and continual pressure adjustment. Maxitrols track mounted A200 can convert a controllers DC output signal of either 4 to 20 milliamps or 0 to 10 volts, to a 0 to 20 volt DC signal. Toggling between 4-20 mA or 0-10 V is achieved with an on-board three position DIP (dual in-line package) switch: 4-20 mA -all positions on, 0-10 V all positions off. When computer or other process controls are specified instead of standard Maxitrol companion electronic controls, the signal conditioner provides compatibility with Maxitrol modulator modulator-regulator valves. The track mounted AP300 can convert a controllers DC output signal of 4 to 20 milliamps to a 0 to 20 volt DC signal used to drive the Maxitrol Selectra valve. Signal conditioners and M/MR valves can be configured for direct or indirect fired applications. They may be field installed on existing equipment or specified for new equipment installation. A300 A200 Selectra M Series SELECTRA SYSTEMS AM01 TDM01-A Selectra Signal Conditioners

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