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Category: Using your Alicat

  • Alarm function (ALE command) tutorial

    Alarm function (ALE command) tutorial Alicat flow and pressure devices have an optional alarm functionality that helps simplify control systems such as PLCs or manned stations. An alarm is transmitted as an analog signal though the communications connector on the device. In systems where an Alicat is not connected to a central system, the alarm […]

  • FP-25 calibrator setup instructions

    FP-25 calibrator setup instructions The FP-25 is used to audit and calibrate flow, pressure, and temperature readings for the samplers and analyzers below: PM10 and PM2.5 FRM samplers (16.7 LPM) – Mesa Labs PQ series, Met One E-FRM, Thermo Scientific Partisol 2000/2025(i) and Dichots, Tisch TE-Wilbur PM10 and PM2.5 FEM analyzers (16.7 LPM) – Environment S.A. MP101M, […]

  • IP address configuration tutorial

    IP address configuration tutorial An Alicat device with Ethernet-based protocols has an IP address to distinguish it from other devices on the network. This can be set either as a static address, or an address determined by a DHCP (Dynamic Host Configuration Protocol) server. The front panel accessibility for this feature makes it possible to […]

  • Control deadband tutorial

    Control deadband tutorial The dual valve PCD-Series maintains fast, precise closed system pressure control with minimal gas waste. This stable control is primarily due to a well-balanced PD2I algorithm. However, changing ambient conditions can still cause oscillation loops. Controller deadband creates a ± band of change around the chosen setpoint, minimizing oscillation loops in dual valve […]

  • Display configuration tutorial

    Display configuration tutorial The large display on front of your Alicat can be configured to meet specific application needs. This tutorial explains how to change contrast, adjust backlight, and rotate your display 180 degrees for mounting upside-down. Video tutorial Step-by-step instructions (front panel) LCD contrast Press the bottom right button for “MENU” selection. Press the […]

  • Control loop variable tutorial: Changing between mass flow, volumetric flow, or pressure control

    Control loop variable tutorial: Changing between mass flow, volumetric flow, or pressure control An Alicat mass flow controller is usually set up to control mass flow rate, but it can instead be set to control pressure or volumetric flow rate. See below for instructions on how to change the control variable. Video tutorial Step-by-step instructions […]

  • Setpoints/setpoint limits tutorial

    Setpoints/setpoint limits tutorial An Alicat can accept a setpoint from the front panel, a serial command, or an analog signal. All you have to do is make sure the Alicat knows where to look for the setpoint. Sometimes, you may want to limit the allowable setpoints to a specific range to avoid accidental tampering with […]

  • Totalizer tutorial

    Totalizer tutorial While a meter measures the rate of flow at any given moment, a mass flow totalizer measures the total accumulated mass of a particular gas (or gas mixture) that has been flowed in a process. The totalizer function can also be used with a mass flow controller to dispense batches of set amounts […]

  • Gas Select™ and Composer™ tutorial

    Gas Select™ and Composer™ tutorial Alicat mass flow devices come preloaded with 98-130 gases that are selectable using Gas Select™. Composer™ firmware additionally allows the user to create and store up to 20 custom gas mixes. See below for instructions how to use Gas Select™ and Composer™. Video tutorial Step-by-step instructions Gas Select™ (front panel) […]

  • Zero band (deadband) tutorial

    Zero band (deadband) tutorial Alicat mass flow devices measure flow using differential pressure, making them very sensitive. Because of this, factors such as the air conditioning in the room may lead to small fluctuations in device readings. If you notice that your device is fluctuating around very low flow rates, you can use the zero […]