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Table of Contents

Contents

Introduction

Recalibration

Getting Started

The Pressure Controller Display

Status Messages

Process Ports

Operating Pressure

Connecting Plumbing to Your Pressure Controller

Applications

Valve Orientation

Special Configurations

Differential Pressure

Integrated Vacuum Controllers (IVC)

Remote-Sensing Controller

Using Alicat Pressure Instruments with Fluids

Power and Signal Connections

RS-232 or RS-485 Digital Signals

Engineering Units

Option: Color TFT Display

Navigation & Customization

Control Menus

Changing the Setpoint

Establishing Setpoint Limits

Setpoint Ramping

Adjusting the Closed Loop Controller

Troubleshooting valve performance with PID tuning

Device Information

Basic Configuration Menu

Engineering Units

Advanced Setup

Display Setup

Sensor Setup

Configuring Serial Communications

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Содержание ALICAT SCIENTIFIC PC

Страница 1: ...OPERATING MANUAL FOR PRESSURE CONTROLLERS Models PC PCS PC3 PC3S PCR IVC EXTSEN...

Страница 2: ...rlands 31 0 26 203 1651 Recalibrate your pressure controller every year Annual calibration is required to ensure the continued certainty of readings and to extend the Limited Lifetime Warranty page 48...

Страница 3: ...trollers This includes devices configured with corrosion resistant materials PCS PC3S devices with a remote sensing line PC3 PC3S a remote sensor EXTSEN hammerhead dual valve configurations PCH PCR PC...

Страница 4: ...Controller 13 Using Alicat Pressure Instruments with Fluids 13 Power and Signal Connections 14 RS 232 or RS 485 Digital Signals 15 Engineering Units 16 Option Color TFT Display 17 Navigation Customiz...

Страница 5: ...ting Point Numbers 36 Sending Setpoints as Integers 36 Quick Command Guide 37 Troubleshooting 38 Maintenance 41 Cleaning 41 Recalibration 41 Engineering Units 42 Pinouts 43 8 Pin Mini DIN Default 43 L...

Страница 6: ...gs below represent a typical configuration of a pressure controller Your device s appearance and connections may differ 0 0000 MENU PSIG SETPT 0 0000 Ga Press PSIG 0 0000 I O Port shape varies DC In L...

Страница 7: ...ton engineering units which are the units being displayed These can be individually configurable using the front display page 28 Chooses the pressure engineering units page 28 TARE PRESS tares the pre...

Страница 8: ...ot wrap the first two threads This will help prevent tape getting into the stream No tape is needed for face seal fittings When changing fittings carefully clean the port threads Warning Do not use pi...

Страница 9: ...m valve configuration will result in the sensor exposed to the upstream pressure Due to this the controller will be regulating the upstream pressure and this configuration is known as a back pressure...

Страница 10: ...ce of the unit for connection to two points in the system where the differential pressure is measured from The upstream port is for the higher of the two pressures and the downstream port is for the l...

Страница 11: ...ure controller as this significant increase in viscosity requires a larger valve to reach expected flow rates For example a PC series pressure controller sized to flow up to 20 SLPM of air will be lim...

Страница 12: ...sensor package which integrates a 1000 Torr and 10 Torr sensor for increased turndown Integration of the vacuum sensor control valve and PID algorithm in a single device eliminates the need for an ext...

Страница 13: ...cking industrial connector M12 DB9 and DB15 pinouts see page 42 or visit alicat com pinouts Pin Cable Color Function 1 Black Not connected Optional 4 20 mA primary output signal 2 Brown Static 5 12 Vd...

Страница 14: ...ry analog output signal which is linear over its entire range For ranges that start at 0 Vdc a zero pressure condition is indicated at approximately 0 010 Vdc Full scale pressure is indicated by the t...

Страница 15: ...he screen pressing that measurement s button again will bring up a menu to modify either the button engineering units or the device engineering units If the device and button engineering units are the...

Страница 16: ...symbol in selections on monochrome display Press the Alicat logo button to turn off the color display backlight located below the row of three buttons under the screen The pressure controller remains...

Страница 17: ...ice a zero reference Auto tare automatically tares when a zero setpoint is set for a short time but auto tare is not recommended for pressure controllers in most situations How to Manually Tare 1 Ensu...

Страница 18: ...e not editable via the front panel if the source is analog BACK returns to the Main Menu selection previous page ADV CONTROL moves to the Advanced Control menu below MAIN exits to the Main Display pag...

Страница 19: ...the Advanced Control Menu page 18 SETPT LIMITS Sets upper and lower setpoint limits page 21 MAIN Exits to the Main Display page 7 Control Deadband Menu Control Advanced Control Control Options Dead Ba...

Страница 20: ...ce is set to Serial Front Panel the controller will accept input from either the front panel or an RS 232 RS 485 connection Neither source is a subordinate of the other so the controller will accept t...

Страница 21: ...e outside of the setpoint limits are treated as if they were at the nearest limit If you request a setpoint that is below the lower limit the controller sets the setpoint at the lower limit Likewise a...

Страница 22: ...ping function independently for changes that require increases or decreases to achieve the new setpoint For example you can enable ramping up to a pressure setpoint to prevent pressure from building t...

Страница 23: ...no effect Menu Control Setpoint Ramp DELTA sets the change in pressure permitted in the time interval TIME UNITS selects the unit of time for calculating the ramp rate TIME sets the time over which th...

Страница 24: ...you choose the closed loop control algorithm and adjust the gain settings for the proportional integral and derivative variables Note The D and P variables in the PD PDF control algorithm are more ty...

Страница 25: ...equivalent to the I variable in common PDF controllers Tuning the PD I control algorithm The controller s PD I control algorithm also called PDDI is used to provide faster response most commonly in d...

Страница 26: ...e P gain in decrements of 10 PD I If D is not zero increase the P gain in increments of 10 In rare situations D may be zero in that case decrease the P gain in 10 increments to avoid overshoot Delayed...

Страница 27: ...them to diagnose issues over the phone PAGE displays the next page of register values Menu About Device State EDIT EDIT REGSTR allows the user to edit any register values on the device This can also...

Страница 28: ...ering units Button Engineering Units Changes the units on the front display only Device Engineering Units Changes the units on the front display and serial data frame 1 Basic Configuration Menu 3 Avai...

Страница 29: ...display and enable screen rotation LCD CONTRAST sets the contrast level of the display ranging from 0 31 on monochrome displays and 0 11 on color displays Press reset to revert to the default contrast...

Страница 30: ...of pressure readings to display on screen and in the serial data frame Older devices typically had one less significant digit and newer devices can be set to match BACK returns to the Advanced Setup...

Страница 31: ...ffect when SET is selected Selecting as the Unit ID will set the controller to streaming mode when you exit the menu page 33 NOTE Devices equipped with Modbus RTU will also have a Modbus ID that can b...

Страница 32: ...ter then in most cases it will recognize your USB as a virtual COM port If it does not download the appropriate USB device driver at alicat com drivers and note the COM port number as found in Windows...

Страница 33: ...unit ID is unique Streaming Mode In streaming mode your device continuously and automatically sends a line of live data at regular intervals Only one unit on a COM port may be in streaming mode at a...

Страница 34: ...points in the system as equal Tare gauge pressure unit ID p Example ap Absolute pressure devices cannot tare Collecting Pressure Data Collect live pressure data by typing the unit ID command or by se...

Страница 35: ...mber in the selected engineering units New setpoint unit ID s floating point number setpoint Example as5 44 setpoint of 5 44 PSIG New setpoint unit ID s floating point number setpoint Example as 15 00...

Страница 36: ...w91 number of milliseconds New setpoint as setpoint as floating point New setpoint a setpoint as integer where 64000 is full scale Hold valve s at current position ahp Hold valve s closed ahc Cancel v...

Страница 37: ...e 7 Issue The analog output signal indicates values lower than what appears on my instrument s display Action Analog signal voltage degrades over long distances You can minimize this effect by using w...

Страница 38: ...essure controller is internally compensated for many situations so you can use it side ways on its back or upside down For upside down installations you may want to rotate the display 180 page 29 Howe...

Страница 39: ...re the same as your controller see page 31 2 Check the pressure controller unit s serial ID also on page 31 3 Check the pinout see page 42 or online at alicat com pinouts 4 Make sure the COM number ma...

Страница 40: ...rial has entered your device do not take apart the flow body to clean it as this will negate its NIST traceable calibration Please contact us see page 2 for cleaning Recalibration The recommended peri...

Страница 41: ...of mercury at 0 C inHgA inHgG inHgD inch of mercury at 0 C mmH2OA mmH2OG mmH OD millimeter of water at 4 C NIST conventional mmH2OA mmH2OG mmH2OD millimeter of water at 60 C cmH2OA cmH2OG cmH2OD cent...

Страница 42: ...Vdc or basic alarm 3 Red Serial RS 232RX Input Signal Optional RS 485 A 4 Orange Analog Setpoint Input 5 Yellow Serial RS 232TX Output Signal Optional RS 485 B 6 Green 0 5 Vdc Analog Out Optional 1 5...

Страница 43: ...232TX RS 485 B 3 RS 232RX RS 485 A 4 Analog Setpoint Input 5 Ground common for power communications and signals 6 Analog Out voltage or current as ordered Note The availability of different output si...

Страница 44: ...or A TX or B NC Power In 2 Analog Out Analog Out Analog Out Analog Out Analog In 3 Power In Ground Analog In Power In Analog Out 4 Ground Power In RX or A Ground NC 5 Ground Ground Analog Out 2 NC Gro...

Страница 45: ...ional RS 485 A 4 Analog Setpoint Input Analog Setpoint Input 5 Serial RS 232 TX signal Optional RS 485 B Serial RS 232 TX Signal Optional RS 485 B 6 Static 5 12 Vdc Optional Secondary analog output 4...

Страница 46: ...nd Ground 10 Ground NC Ground Analog Out 2 NC Ground Ground 11 Analog Out 2 NC Analog Out 2 Power In Ground Analog Out 2 Analog Out 2 12 NC Analog Out 2 NC Ground Ground NC RX or A 13 RX or A NC NC NC...

Страница 47: ...TEX Directive or Group II Category 3G equipment ATEX certification is indicated by the product label and not by the statements in this or any accompanying documentation To comply with CSA and ATEX cer...

Страница 48: ...this warranty Alicat Scientific does not recommend warrant or assume responsibility for the use of the Products in life support applications or systems Alicat s warranties as herein above set forth s...

Страница 49: ...PRESSURE CONTROLLER operating manual 49...

Страница 50: ...ion Manufacturer information Device state Diagnostic Information Tares page 17 How and when to tare Tare pressure Basic config page 28 Device units Pressure Advanced setup page 29 Sensor setup Display...

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