Halma Alicat Scientific PCD Operating Manual
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Summary of Contents for Halma Alicat Scientific PCD
- Page 1 OPERATING MANUAL FOR DUAL-VALVE PRESSURE CONTROLLERS Models PCD · PCDS · PCD3 · IVCD...
- Page 2 +1 888-290-6060 PCPD-PSID-D China & SE Asia India info-cn@alicat.com india@alicat.com alicat.com.cn Halma India Pvt. Ltd. 2nd Floor, Block 63, No. 421, Plot No . A-147, Road No. 24, Hong Cao Rd, Next to Spraytech Circle Shanghai 200233 opp. Metropolitan Company, Wagle Industrial Estate +86-21-60407398 ext.
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Page 3: Introduction
Introduction Your pressure controller has a variety of innovative features: • 1000 readings per second guarantees high resolution data, page • Backlit display with adjustable contrast is easy to read even in direct sunlight. In dimly lit areas, press the logo to turn on the backlight, page PCD-PSIG-D... -
Page 4: Table Of Contents
Contents Introduction Setup Sensor Setup Quick Start Guide Choosing Engineering Units Getting Started Pressure Averaging Zero Band Getting to Know Your Pressure Controller Configuring Serial Communications The Pressure Controller Display Unit ID Status Messages Modbus RTU Configuration Mounting Baud Rate Filters Display Setup Device Ports... -
Page 5: Quick Start Guide
Quick Start Guide Setup This is a typical Connect your pressure controller. dual-valve gauge Choose your engineering units. You can pressure configuration. choose the measurement units by selecting MAIN MENU SETUP Sensor Engineering Units → → → , see page 16 for more details. -
Page 6: Getting Started
Getting Started Getting to Know Your Pressure Controller The Pressure Controller Display The figure below identifies the various features of the main pressure controller display. Highlights pressure in the center of the display. Tares the pressure (typically unavailable for abso- lute pressure devices) (page 11). -
Page 7: Device Ports
Device Ports Your pressure controller has been shipped with plastic plugs fitted into its ports. To decrease the chance of contaminating the flow stream, do not remove these plugs until you are ready to install the device. Standard pressure controllers have female inlet and outlet ports. VCR®-compatible and other specialty fittings may have male connections. -
Page 8: Applications
Applications Gauge and Absolute Pressure Control The port on the face of the unit is connected to the closed volume where you want to control pressure. The valve on the supply side will open to increase the pressure in the closed volume, and the valve on the exhaust side will open to decrease pressure. -
Page 9: Dual-Valve Integrated Vacuum Controllers (Ivcd)
Dual-Valve Integrated Vacuum Controllers (IVCD) IVCDs are similar to the PCD-Series absolute pressure controllers in functionality and in the navigation menus available on the screen. IVC devices are used in applications where precise control of vacuum is required, and are available with 10 TorrA, 100 TorrA, 1000 TorrA, and combined 1000 &... -
Page 10: Power And Signal Connections
Power and Signal Connections Power can be supplied to your controller through either the power jack or the multi-pin connector on top of your device. ✓ Note: Power requirements vary based on analog configuration and valve type. Please reference the associated specification sheet at alicat.com/specs for power requirements. Standard 8-Pin Mini-DIN Pinout A dual-valve gauge pressure Female Connector: Device... -
Page 11: Displaying Live Data
Displaying Live Data Main Display The main display has four primary functions: • Displaying live pressure data • Setting the pressure controller’s setpoint • Taring the pressure (page • Accessing the main menu ( MENU Live data is measured 1000 times per second and the LCD display is updated 10 times per second. -
Page 12: Control
Control Changing the Setpoint SETPT or MENU CONTROL Setpt: → → The setpoint selection screen indicates the engineering units and maximum allowable The control menu. setpoint (e.g., PSIG: +10.000 Max). To cancel a setpoint, press CLEAR , then Adjusting Setpoint with an IPC For controllers ordered with a potentiometer control knob (IPC), the setpoint source must be set to analog for the controller to receive setpoint commands from the IPC (see “Changing Between Setpoint Sources”... -
Page 13: Establishing Setpoint Limits
Establishing Setpoint Limits CONTROL Setpoint Setup Setpoint Limits → → The setpoint limits menu configures upper and lower limits for selecting a pressure control setpoint. By default, the controller will only be limited by its measuring range; however, more strict limits may be beneficial in certain critical applications. Over a serial connection, requesting a setpoint outside the limit will be rejected and an error will be returned. -
Page 14: Troubleshooting Valve Performance With Pid Tuning
Troubleshooting Valve Performance with PID Tuning The following issues can often be resolved by adjusting the PID gain values for your pressure controller. Fast oscillation around the setpoint • PD: Reduce the P gain in decrements of 10%. • PD²I: Increase the P gain in increments of 10%, and then adjust the I gain to fine-tune. Overshot setpoint •... -
Page 15: Displaying Valve Drive Percentage
Displaying Valve Drive Percentage The valve drive is represented as a percentage of the amount of voltage driven to the valve. Percentages do not directly correlate with percentage open. Viewing the valve drive percentage is particularly helpful for troubleshooting. An increasing percentage over time likely indicates a clog in the system, where more voltage is required to drive the valve to attain the same amount of flow. -
Page 16: Setup
Setup Sensor Setup MENU SETUP Sensor → → Choosing Engineering Units The setup menu. SETUP Sensor Engineering Units → → Changing engineering units alters both the display and the data frame. Choose the parameter whose unit you want to change, and then choose an engineering unit. Confirm the change on the last screen. Pressure Averaging SETUP Sensor... -
Page 17: Baud Rate
Baud Rate SETUP RS-232 Serial or RS-485 Serial Baud Rate → → Baud rate is the speed at which digital devices transfer information. The pressure controller has a default baud rate of 19200 baud (bits per second). If your computer or software uses a different baud rate, you must change the pressure controller’s baud rate in the BAUD menu to ensure they match. -
Page 18: Serial Communication
Serial Communication Connecting your device to a computer allows you to log the data that it generates. The pressure controller communicates digitally through its communications connector and cable using a real or virtual COM port on your computer. This section of the manual shows you how to operate the pressure controller using ASCII commands. -
Page 19: Streaming Mode
Streaming Mode In streaming mode, your device automatically sends a line of live data at regular intervals. Only one unit on a COM port may be in streaming mode at a time. To put your pressure controller into streaming mode, type: [unit ID]@=@... -
Page 20: Commanding A New Setpoint
Commanding a New Setpoint Before attempting to send a setpoint to your controller serially, confirm that its setpoint source is set to Serial/Front Panel (page 12). There are two ways to command a new setpoint over a serial connection, as described below. In either of these methods, the data frame returns the new setpoint value when it has been accepted as a valid setpoint. -
Page 21: Troubleshooting
Troubleshooting If you run into trouble with your device’s installation or operation, please get in touch with us by phone, chat, or email (page 2). You’ll also find help on our website, alicat.com/support, and in the pages that follow. General Use Issue: My device does not turn on or has trouble staying on. -
Page 22: Serial Communications
Issue: My pressure controller disagrees with another device I have in line. Action: Pressure devices can normally be compared against one another provided there are no leaks between the two devices. Another possibility is an improper tare error (page 11). Issue: Can I use the controller with other gases or liquids? Action: Yes for gases, maybe for liquids. -
Page 23: Reference Information
Reference Information Engineering Units Pressure Units Absolute or Barometric Gauge Differential Notes Pascal hPaA hPaG hPaD Hectopascal kPaA kPaG kPaD Kilopascal MPaA MPaG MPaD Megapascal mbarA mbarG mbarD Millibar barA barG barD g∕cm2A g∕cm2G g∕cm2D Gram force per square centimeter† kg∕cm2A kg∕cm2G kg∕cm2D... -
Page 24: Pinouts
Pinouts Check the calibration data sheet and pinout for your device. page 16 for additional important information about connecting your device to a computer for serial commands. Individual pinouts available at alicat.com/pinout. 8-Pin Mini-DIN (Default) Female Connector: Device Male Connector: Cable Pin Function Not Connected Optional: 4–20 mA primary output signal... -
Page 25: 9-Pin D-Sub Connector Pinouts
9-Pin D-Sub Connector Pinouts Female Connector Male Connector (Female) DB9A / DB9M (Male) DB9K DB9R DB9T DB9U DB9G DB9H DB9I DB9N Current Out TX or B TX or B RX or A RX or A TX or B Power In Analog Out 2 Analog Out Analog Out... -
Page 26: M12 Connector Pinouts
M12 Connector Pinouts Pin M12 M12MD 0–5 Vdc Output Signal Not Connected Optional: 1–5 or 0–10 Vdc Optional: 4–20 mA primary output signal Static 5.12 Vdc Power In Optional: Secondary analog output (4–20 mA, 0–5 Vdc, 1–5 Vdc, 0–10 Vdc) or basic alarm Serial RS-232 RX signal Serial RS-232 RX Signal Optional: RS-485 A... - Page 27 2021.05.26 • REV. 1 • DUAL-VALVE PRESSURE CONTROLLER OPERATING MANUAL...
- Page 28 Geograaf 24 6921 EW Duiven The Netherlands +31 (0)26 203.1651 India india@alicat.com Halma India Pvt. Ltd. Plot No . A-147, Road No. 24, Next to Spraytech Circle opp. Metropolitan Company, Wagle Industrial Estate Thane-West Mahārāshtra 400 604 +91 022-41248010 China &...