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Alicat EPC Series Operating Manual

Electronic pressure and vacuum controllers
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Operating Manual
EPCD-Series
EPC-Series
Electronic Pressure and Vacuum
Controllers
The Fastest Flow Controller Company in the World!

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Summary of Contents for Alicat EPC Series

  • Page 1 Operating Manual EPCD-Series EPC-Series Electronic Pressure and Vacuum Controllers The Fastest Flow Controller Company in the World!

  • Page 2: Table Of Contents

    Technical Data for EPC and EPCD Pressure Controllers Notice: Alicat Scientific, Inc. reserves the right to make any changes and improvements to the products described in this manual at any time and without notice. This manual is copyrighted. This document may not, in whole or in part, be copied, reproduced, translated, or converted to any electronic medium or machine readable form, for commercial purposes, without prior written consent from the copyright holder.

  • Page 3: Getting Started

    DRAWING IS THE SOLE PROPER THE INFORMATION CONTAINED IN THIS TOLERANCES: surfaces. 3. No nicks or dings allowed on machined ALICAT SCIENTIFIC, INC. ANY MATERIAL DRAWING IS THE SOLE PROPERTY OF ANGULAR: 0 30' 303L Stainless 4. Remove all burrs REPRODUCTION IN PART OR A surfaces.

  • Page 4: Mounting

    MOUNTING EPC and EPCD-Series Controllers have mounting holes for convenient mounting to flat panels. These controllers are position insensitive and can be mounted in any orientation. The sizes and dimensions for the mounting holes are shown on page 11. Minimize physical handling of the exposed circuit board of the EPC or EPCD while installing.

  • Page 5: Input Signals

    INPUT SIGNALS Analog Input Signal Standard 0-5 Vdc : Apply analog input to Pin 6 as shown on page 4. 0-5 Vdc is the standard analog input signal. Apply the 0-5 Vdc input signal to pin 6, with common ground on pin 3. Optional 0-10 Vdc: If specified at time of order, a 0-10 Vdc input signal can be applied to pin 6, with common ground on pin 3.

  • Page 6: Output Signals

    Pin 3. Other output options include 0-10 Vdc, 1-5 Vdc and 4-20 mA. EPC-SERIES SINGLE VALVE PRESSURE CONTROLLER OPERATION Alicat Scientific EPC-Series Pressure Controllers incorporate a digital pressure gauge with a single control valve and circuitry. The integrated PID loop measures the pressure, compares it with the setpoint, and adjusts the valve accordingly at 1000 times per second.

  • Page 7: Rs-232 Or Rs-485 Output And Input

    For example, A<CR> is equivalent to a<CR>. Polling Mode All Alicat devices are sent in Polling Mode with Unit ID A unless otherwise requested. Polling a device will return a data frame of the current measurements in the device in units shown on the display. See Data Format, later in this section, for more information.

  • Page 8: Streaming Mode

    Streaming Mode (RS-485 units do not have streaming mode) In Streaming Mode, a device will automatically output the data stream at a pre- determined rate. The default rate is set to 50 ms. Only one unit on a given COM port may be in streaming mode at a time.

  • Page 9: Sending A Setpoint To A Controller With Negative And Positive Range Via Rs-232 / Rs-485

    The following section covers the theory/operational characteristics of the PID parameters: The PD algorithm is the PID algorithm used on most Alicat controllers. It is divided into two segments: The first compares the process value to the setpoint to generate a proportional error.

  • Page 10: Maintenance And Recalibration

    Avoid excess moisture or solvents. For repair, recalibration or recycling of this product, contact: Alicat Scientific, Inc. 7641 N Business Park Drive Tucson, Arizona 85743 Ph. 520-290-6060 Fax 520-290-0109 email: service@alicat.com...

  • Page 11: Technical Data For Epc And Epcd Pressure Controllers

    Technical Data for EPC and EPCD Pressure Controllers Alicat EPC-Series controllers allow the precise control of absolute or gauge pressure. These units can be configured for vacuum pressure or back pressure control. EPCD-Series are dual valve controllers that accurately and efficiently control pressure within a closed system with a minimum loss of expensive gases through the exhaust process.
  • Page 12 EPC-Series: Dimensions and port locations may vary according to build.                               ...

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Epcd series

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