Aalborg, SDPROC-1A1-NA-V, Smart Digital Command Module 1-Channel AFM/AFC Configuration, RS232 Digital Interface, VFD Display, 100-240 VAC North America PlugMicroprocessor driven digital Command Module is use in conjunction with any analog or digital mass flow meter or controller with 0-5 VDC input /output signal. Command Modules contain appropriate power supplies, 24 x 2 alpha-numeric dot matrix display readout, and four panel buttons which provide complete control over all the various functions necessary to measure and/or control flow.ProgrammingIt is easy to program the SMART DPROC using a logically organized, modular menu.The operator quickly accesses a desired function by branching through the multi-level tree structure, rather than scrolling through the entire menu.RS-232 serial communication interface is standard and supported via a 9 pin "D" - connector on the back panel of the Command Module.RS-232 Software interface commands set allows communications with the unit using either a custom software program or a "dumb terminal" and provide complete control over all modes and functions.The following units of measure are supported: %F.S., SLPM, SLPH, SC cm, SCCH, SCFM, SCFH, SC mm, S cmH, LBPM, LBPH, GRPM, GRPH.User Selectable Reference for Set PointThe Internal, External, Program refers to the point of origin for the Set Point signal. In Internal reference mode, the user sets the control signal with SDPROC controls.In External Reference Mode, the user sets the control signal from a remote location (via the Data In/Out 25-pin "D" - connector on the rear panel).In Program Mode the set point signal will be driven by user's custom program stored in the EEPROM. There are Program modes: Batch, Timer.Programmable Batch Flow ControlThe Batch Flow Control allows execution of custom, user preset program of up to sixteen steps. During execution of the program the user can activate or deactivate the LOOP mode. Various flow configurations may be preprogrammed: ramping, pulsing, linearized increasing and/or decreasing of the flow.Programmable Timer Flow ControlThe Timer Flow Control allows execution of custom, user preset program of up to 96 steps. Each step can be preprogrammed for a particular date, time, and set point value. Every step has two fields: starting date, time and set point in % F.S.Flow AlarmsHigh and Low gas flow Alarm limits can be preprogrammed for channel. Alarm conditions become true when the difference between current readings and installed set points are equal or more than corresponding values of high and low alarm levels. Alarm action can be assigned with preset delay interval (0-3600 seconds) to one of the following:Contact closer (separate for High and Low alarm) Buzzer Audible Signal Valve shut down (Close)TotalizerThe total volume of the gas is calculated by integrating the actual gas flow rate with respect to time. Both keypad menu and digital interface commands are provided to:Set the totalizer to ZeroStart the totalizer at a preset flowAssign action at a preset total volumeStart/Stop totalizing the flowRead totalizerTotalizer conditions become true, when the totalizer, and the "Stop at Total" volumes are equal. Totalizer action can be assigned to one of the following:Contact closerBuzzer audible signalValve shut down (Close).