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Graco PrecisionFlo LT Instructions Manual

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Instructions
PrecisionFlo LT
Standard, Series B
Electronically controlled fluid dispensing packages. For professional use
only.
• Pneumatically operated fluid regulators
• EasyKey keypad interface
Not for use in explosive atmospheres.
See page 2 for a list of models and maximum working pressures.
See page 4 for Table of Contents.
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
Certified to CAN/CSA C22.2 No. 1010
9902471
Conforms to
UL 3121-1
™
309738L
ENG

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Summary of Contents for Graco PrecisionFlo LT

  • Page 1 Instructions ™ PrecisionFlo LT 309738L Standard, Series B Electronically controlled fluid dispensing packages. For professional use only. • Pneumatically operated fluid regulators • EasyKey keypad interface Not for use in explosive atmospheres. See page 2 for a list of models and maximum working pressures.
  • Page 2 PrecisionFlo LT Description Power Supply Voltage Power Requirement Control Module Number 234129, Series B Standard PrecisionFlo LT Control Unit 93 - 264 VAC, 50-60 HZ Full Load Amps - 1 Fused Amps - 2 Fluid Modules Precision- Description Maximum Fluid...
  • Page 3 List of Models 309738L...

  • Page 4: Table Of Contents

    Maintenance ......42 PrecisionFlo LT ......8 Mechanical .
  • Page 5 Graco Standard Warranty ....108 Graco Information ..... . 108...

  • Page 6: Manual Conventions

    Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury. • This equipment is for professional use only. • Use the equipment only for its intended purpose. Call your Graco distributor for information. • Read all instruction manuals, tags, and labels before operating equipment. •...
  • Page 7 Warning WARNING FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD Improper grounding, poor air ventilation, open flames, or sparks can cause a hazardous condition and result in fire or explosion and serious injury. • Ground the equipment and the object being dispensed. •...
  • Page 8 Warning WARNING SKIN INJECTION HAZARD Spray from the gun, leaks, or ruptured components can inject fluid into your body and cause extremely serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also cause serious injury.

  • Page 9: Model Identification

    Your equipment was ordered as part of the configured package from Graco. likely ordered as a configured package to fit your appli- cator.

  • Page 10: Overview

    What This Manual Includes PrecisionFlo LT Definitions This manual provides detailed information about the Component Description PrecisionFlo LT control unit and operation of the Preci- sionFlo LT system. Specific information on the fluid Control Unit The PrecisionFlo LT control unit con-...

  • Page 11: Precisionflo Lt Module Overview

    The control assembly sends continuous voltage signals to automation-supplied signals to provide an accurate to the PrecisionFlo LT fluid assembly regulator to control and consistent output flow based on a comparison of fluid pressure and the opening and closing of the dis- actual to desired flow rates.

  • Page 12: Typical Precisionflo Lt Configurations

    Typical PrecisionFlo LT Configurations Typical PrecisionFlo LT Configurations Major components in a typical PrecisionFlo LT installation. Air Supply Drop Site Note: For proper operation of filter assembly, filter orientation must be such that the bowls are orientated so the bowls are always perpendicular to the ground (i.e. do not attach to robotic arms, as the filters may not remain in the proper orientation.)

  • Page 13: Typical Precisionflo Lt Configurations

    Typical PrecisionFlo LT Configurations Typical PrecisionFlo LT Configurations Optional Temperature Conditioned System Air Supply Drop Site Fluid Supply System Description Water Jacketed Supply Hose PFlo LT Control Assembly Water Jacketed Dispense Hose PFlo LT Fluid Metering Assembly Temperature Control Unit...
  • Page 14 Typical PrecisionFlo LT Configurations Typical PrecisionFlo LT Configurations Major components in a typical heated PrecisionFlo LT installation. Air Supply Drop Site Fluid Supply Hose Description 2 - Zone Accessory Heat Control PFlo LT Control Assembly Automation Controller PFlo LT Fluid Metering Assembly...

  • Page 15: Fluid Metering Assembly Overview

    Hot melt PrecisionFlo LT Pneumatic Fluid Regulator The PrecisionFlo LT pneumatic fluid regulator is a preci- sion fluid pressure regulator that uses air pressure to control fluid pressure and to provide fast response to electronic commands and ensure a precisely controlled, continuous flow of material.

  • Page 16: Installation

    Installation Installation Overview The basic steps to install a Graco PrecisionFlo LT system are shown below. See the separate component manuals for detailed information. Installation Steps 1. Mount LT control unit 2. Ground LT control unit 3. Mount fluid plate 4.

  • Page 17: Installing The Control Unit

    Installing the Control Unit Mounting the Control Unit WARNING Read Warnings, page 6. • Select a location for the PrecisionFlo LT control unit that allows adequate space for installation, service, and use of the equipment. See F . 6. •...

  • Page 18: Electrical Connections

    The PrecisionFlo LT control unit must be electri- cally connected to a true earth ground; the ground in the electrical system may not be sufficient. The PrecisionFlo LT fluid module is grounded to the • All wires used for grounding must be 18 AWG mini- control unit, using cables provided with the module.

  • Page 19: Connecting To Power Source

    0.25 ohms. Read Warnings, page 6. Have a qualified electrician connect the PrecisionFlo LT control assembly to a grounded electrical source that has the required service ratings, as shown in the Power Requirement table.

  • Page 20: Installing Fluid Metering Assembly

    PrecisionFlo LT control assembly. Installing the Assembly WARNING Read Warnings, page 6. 1. Select a location for the PrecisionFlo LT fluid meter- ing assembly. Keep the following in mind: • Allow sufficient space for installing the equipment.

  • Page 21: Connecting Fluid And Air Lines

    • The PrecisionFlo LT fluid module should be installed To maximize system performance keep the dis- on the automation unit or in another appropriate place, as close as practical to the dispense valve.

  • Page 22: Installing Cable Assemblies

    Installing Cable Assemblies Installing Cable Assemblies Automation I/O *Operations Cable PrecisionFlo LT Control Unit *Available in lengths of: Automation I/O 25’, 60’, or 125’ Controller Fluid Module Cables Connecting the Operations Cable Operations Cable (13) - This cable carries signals Operation cables are offered in three lengths (25, 60, between the fluid module and the control unit.

  • Page 23: Installing The Cable Assemblies

    In Cycle / 2740 This signal indicates to the automation control that the an 18-pin receptacle for the automation I/O cable. PrecisionFlo LT unit is currently in a job cycle. Minimum Volume Dis- This signal indicates when the minimum amount of pensed / 2770 material is dispensed.

  • Page 24: Checking Ground Continuity

    Installing the Cable Assemblies Checking Ground Continuity Have a qualified electrician check the resistance between: WARNING • true earth ground and the panel ground lug • the application device and the automation unit • the fluid module and the automation unit To reduce the risk of fire, explosion, or electric shock, the resistance between the supply unit components •...

  • Page 25: Precisionflo Lt Module Operation

    PrecisionFlo LT Module Operation PrecisionFlo LT Module Operation Reading PrecisionFLo LT Control / Indicators . 11 Table 2 - PrecisionFlo Buttons/Switches Button/Switch What it Does Sealer Stop Button • Disables all air solenoids and V/P regulators. • Signals the external controller that a SEALER STOP condition is in effect.
  • Page 26 PrecisionFlo LT Module Operation 309738L...

  • Page 27: Precisionflo Lt User Interface

    Navigation Keys Help Key . 12 Key Groups Action Keys There are three groups of keys on the PrecisionFlo LT • Manual Dispense Gun – is used for functions user interface. related to the regulator and dispense gun, including manual dispense, and calibration.

  • Page 28: Operation Modes

    PrecisionFlo LT User Interface Operation Modes Control Modes The PrecisionFlo LT system has two operating modes: The PrecisionFlo LT module has four fluid dispensing control modes: • Automatic dispense mode – enables the Precision- Flo LT module to begin dispensing when it receives a •...

  • Page 29: Automation Modes

    • Fixed mode – enables the PrecisionFlo LT system to OTHER screen appears. The command mode is dispense at preset rate in the control unit. indicated on this screen, either Fixed or Analog.

  • Page 30: Operation

    WARNING Read Warnings, page 6. This procedure describes how to relieve pressure for the To Dis- PrecisionFlo LT system. pense Valve 1. Shut off the fluid supply to the fluid module. 2. Place a waste container beneath the fluid drain Manual valve, which is located at the filter.

  • Page 31: Starting The System

    See page Read and understand Operation section of this manual See Table 2 - PrecisionFlo Buttons/Switches and PrecisionFlo LT User Interface, page 32 for infor- mation on the PrecisionFlo LT control unit buttons, Startup system switches, and indicator lights.

  • Page 32: Loading Material

    Operation Loading Material 4. Set the control unit to Manual mode. See Operation Modes, below. Before you can configure the software, you must load 5. Select a control mode other than bead control. Dis- material into the supply system. pensing in bead control mode is not possible until a flow calibration has been performed.

  • Page 33: Configuring Software

    PrecisionFlo LT software. Configure Software To configure the PrecisionFlo LT software, perform the following procedure. When you have completed this pro- Select Control cedure, the module is ready for operation.

  • Page 34: Setting Flow Meter K-Factors

    • Set Ki volume to 2 and continue to increase the Ki value by 2 until the system oscillates. The PrecisionFlo LT system uses variables (Kp and Ki) • Decrease Ki until oscillation stops. in the software calculations to accurately and precisely control the fluid pressure and flow rate.

  • Page 35: Flow Rate Calibration

    Configuring Software Flow Rate Calibration Table 5 - Maximum Flow Rate Values (cc/min) Round Equivalent Bead Diameter (mm) The system only calibrates flow rate if you are operating Max. Automa- in Bead Control Mode. Flow rate calibration takes place immediately after the pressure calibration in bead con- tion Speed trol mode.

  • Page 36: Verifying Flow Meter Calibration

    (cc) density (g/cc) ordered. A quick check of these variables is recom- mended. See Table 5 - PrecisionFlo LT User Vari- ables and Presets and Table 6 - PrecisionFlo LT 5. Calculate the new flow meter K-factor: System Variables.
  • Page 37 LT User Interface, starting on page 84. There are additional variables that should be set after the path programming is completed, they include; High/Low pressure settings and Style (volume) information. Table 5 - PrecisionFlo LT User Variables and Presets Values in italics are factory defaults. Screen...

  • Page 38: On/Off Delays

    Configuring Software On/Off Delays Table 7 - On/Off Delay Variables The PrecisionFlo LT regulator can physically respond Variable: Sets the Amount of Time: faster than the dispense device and its solenoid. As a Gun ON Sets time from Dispense Gun High to...

  • Page 39: Shutting Down The System

    1. Shut off the material supply to the fluid module. 2. Follow the Pressure Relief Procedure on page 30. WARNING Read Warnings, page 6. 3. Turn off the PrecisionFlo LT system's compressed air supply. 4. Press the sealer stop button (7). See F . 19.

  • Page 40: Communicating With Precisionflo Lt

    The software upgrade is now complete. Cycling the Graco Shell by pressing the Enter key on the key- power to the controller is recommended after a software board. The main menu will be displayed.
  • Page 41 Graco Shell by pressing the Enter key on the key- board. The main menu will be displayed. Displaying Versions ****Welcome to the Graco EasyKey Display**** Select option “b”.

  • Page 42: Maintenance

    Maintenance Maintenance The following is a list of recommended maintenance procedures and frequencies to operate your equipment safely. The maintenance is divided between mechanical and electrical tasks. Maintenance must be performed by trained personnel per this schedule to assure safety and reliability of the equipment. Mechanical Operator Maintenance Person...

  • Page 43: Troubleshooting

    Troubleshooting Troubleshooting Troubleshooting for individual regulators and flow meters is discussed in their separate manuals. These WARNING manuals are called out in the parts lists later in this man- ual. Also refer to the section on Troubleshooting and Fault Recovery for detailed information on how fault Read Warnings, page 6.

  • Page 44: Flow Meter

    Troubleshooting Flow Meter Problem Cause(s) Possible Solution(s) Flow meter pick-up sensor loose Tighten flow meter pick-up sensor No flow measurement Flow too low Verify flow rate is above minimum for the flow meter selected Loose wiring Verify wiring connections from flow meter to junction box Damaged flow meter pick-up sensor Replace pick-up sensor...

  • Page 45: Dispense Valves

    Troubleshooting Dispense Valves Problem Cause(s) Possible Solution(s) Valve not opening Air not getting to open port Verify air pressure solenoid No “Gun On” signal from automa- Check input from automation unit tion unit No output from system I/O board Check output from system I/O board;...

  • Page 46: Electrical Component Paths

    Troubleshooting Electrical Component Paths Use the following table to troubleshoot wiring to the automation: Component Description Cable / Enclosure Board / Connector Wire Color Wire Dispense Gun +24 VDC Input 3290 J8-4 Job Complete +24 VDC Input 3310 J8-5 24 VDC From IFC +24 VDC Input 2120 +24 VDC...

  • Page 47: Troubleshooting And Fault Recovery

    The following table describes the valid fault codes used Resetting Control Unit After a Fault by the PrecisionFlo LT module, possible causes, and solutions. PrecisionFlo LT module displays warnings If a fault has occurred, you should clear (reset) the fault and alarms on the user interface and alarms via the con- before restarting the PrecisionFlo LT control unit.
  • Page 48 Alarms/Warnings screen) High Outlet Output pressure to the Incorrect limit set Verify limit is set correctly Pressure PrecisionFlo LT regulator Dispense hose/device plugged Clean/replace hose/device is above the upper limit Failed transducer CHeck transducer, replace if failed set for operation. If this...
  • Page 49 Increase cycle was above the Bead scale amount established by PrecisionFlo LT regulator is not Check regulator, repair if neces- request and above the regulating properly sary. Increase pressure to regula- allowable (entered) toler- tor above.
  • Page 50 Troubleshooting and Fault Recovery Fault Fault Name Fault Description Causes Priority High Flow Measured Flow rate Operating below the minimum Increase fluid pressure above reg- Rate more than desired flow regulator operating pressure ulator minimum rate plus tolerance Regulator worn or not operating Repair regulator properly Flow meter providing false pulses...

  • Page 51: Control Assembly Service

    Control Assembly Service Control Assembly Service Servicing the Panel Assembly This part of the manual provides information about the • Main Control Board following panel assembly component: • Software Upgrade • Fuse • Display Backlight Main Control Board Easy Key Interface Display Backlight Fuses Door Side...

  • Page 52: Software Upgrade

    See Display Board F . 21 or • Use the Graco Shell Serial menu System (see Com- Control Board F . 22. municating with PrecisionFlo LT, page 40).

  • Page 53: Control Board

    Software Upgrade Control Board Beveled edge 253613 flash memory chip . 22 309738L...

  • Page 54: Panel Assembly Service

    Panel Assembly Service Panel Assembly Service Fuse Removal Fuse Replacement Remove the fuse as follows: Replace the fuse as follows: WARNING Check the new fuse to ensure that it matches the amp rating of the failed fuse. Read Warnings, page 6. 1.

  • Page 55: Replacing The Backlighting

    Panel Assembly Service Replacing the Backlighting 3. Unlock and open the hinged cover of the control assembly. WARNING 4. Unplug the ribbon cable from the board (4) by slid- ing it out of the connector. Note the position of the cable in the connector.

  • Page 56: Fluid Module Service

    308778 for all G3000 meters, and 309834 for all • regulator (14) (F . 25) Graco Helical flow meters. Remove the Flow Meter from the Mounting Plate The numbers in parentheses in the text refer to ref- erence numbers in the parts drawings and parts lists.
  • Page 57 Fluid Module Service Install the Flow Meter on the Mounting Plate 2. Remove the cartridge assembly by loosening the valve housing (5) with a 6 mm hex wrench and pull- 1. Rest the flow meter and bracket (20) on the fluid ing the cartridge assembly out of the base housing plate while threading the swivel fitting (18) onto the (4).
  • Page 58 Fluid Module Service Torque Sequence for Regulator Base Housing Screws (9) cartridge diaphragm assembly and valve actuator subassembly . 26 309738L...

  • Page 59: Frequently Asked Questions

    Frequently Asked Questions Frequently Asked Questions What is the difference between running in Volume Monitor versus Bead Control? In Volume Monitor the control will maintain a specific pressure at the fluid regulator outlet. If the viscosity of the fluid changes or the nozzle becomes restricted, that pressure will result in a different flow rate. If you have a flow meter installed it can still monitor the job volume for faults.
  • Page 60 Turn off the air supply before moving tubes. How do I download job logs or alarm logs from the PrecisionFlo LT control? There is an external phone-style connection on the right side of the control enclosure. You need a PC or laptop computer with terminal emulation software and part number 233657 accessory cable kit.
  • Page 61 Frequently Asked Questions Can I change my Setup values while the machine is running? Yes. If you turn the key switch to Setup mode, you have complete control of the system. Changes to control modes, pressure values, time delays, alarms, etc. become effective when you press Enter and the changes are saved to memory when the key switch is turned back to Run mode.

  • Page 62: Fault Reporting

    Fault Reporting Fault Reporting • Alarms, which cause the PrecisionFlo LT DIS- PENSER READY signal to go LOW or, • Warnings, which keep the PrecisionFlo LT DIS- PENSER READY signal HIGH. Fault On Data Both volume and fault data are available on the I/O interface.

  • Page 63: Control Assembly Parts

    Control Assembly Parts Control Assembly Parts Part No. 234129, Series B, PrecisionFlo LT Standard Control Assembly Part No Description Qty. Part No Description Qty. TERMINAL ENCLOSURE WASHER, lock 112546 SCREW, machine NUT, hex ◆ 118334 LABEL, warning CONNECTOR, RJ12 PLUG, conduit...

  • Page 64: Control Assembly Parts (Continued)

    Control Assembly Parts (continued) Control Assembly Parts (continued) 32, 33, 36 25, 26 30, 35 309738L...

  • Page 65: Fluid Module Parts

    Fluid Module Parts Fluid Module Parts For additional parts see page 66. Fluid Outlet Fluid Inlet Air Inlet To Dispense Valve 43,44 38,39 38,39 26 30,34 12 Qty. Qty. Part No Description Part No Description 26 054753 TUBE, nylon rd 117669 PLATE, blank fluid 29 110580 SCREW, cap sock...

  • Page 66: Fluid Module Parts (Continued)

    Fluid Module Parts (continued) Fluid Module Parts (continued) Code C Option - 06 Model No 234170 Code C Option-01 Model No 234168 234171 Junction Box 234171 Junction box 198082 Transducer, Pressure 198082 Transducer, pressure 246642 Regulator, mastic 244734 Regulator, assembly 108328 Screw, cap skt 108328...

  • Page 67: Accessory Parts

    Accessory Parts Accessory Parts Automation Interface Cable Assembly The cable length of automation interface cable assembly 117774 is 40 ft (12.2 m). This figure shows the cable and identifies the cable interface signals. Pin # Wire # Color Description 3290 Dispense Gun 3310 Job Complete...

  • Page 68: Operations Cable Assembly

    Operations Cable Assembly Operations Cable Assembly The operations cable is offered in these lengths (25 ft, 60 ft, and 125 ft.) and three different flexibilities. See page 9 for cable options. 24 VDC thru E-stop 24 VDC common Gun solenoid Ground V/P + V/P -...

  • Page 69: Electrical Schematics

    Electrical Schematics Electrical Schematics PrecisionFlo LT Control Box . 28 309738L...
  • Page 70 PrecisionFlo LT Control Box PrecisionFlo LT Control Box . 29 309738L...
  • Page 71 PrecisionFlo LT Control Box PrecisionFlo LT Control Box . 30 309738L...
  • Page 72 PrecisionFlo LT Control Box Fluid Module Junction Box Max outlet pressure range switch: Connections for: set appropriate fluid -2170 Pressure sensor -2170 -2650 working pressure -2650 -2660 (1500, 3500, -2660 -GND Gun Solenoid or 5000 psi) See page -GND -3190...

  • Page 73: Technical Data

    *Flow rates and viscosities are general estimates. Flow rates drop as viscosity increases. Fluids are expected to shear under pressure. New applications or fluids should always be tested to determine proper line sizes and equip- ment selections. See your Graco Authorized distributor for other capabilities. 309738L...
  • Page 74 *Maximum system pressure depends on dispense valve. Air outlets, open and close to dispense valve 5/32” or 4 mm tube fittings Electric Power Requirements 24 VDC, from PrecisionFlo LT control Height 8” (203 mm) (varies with model) Fluid Specifications For use when dispensing fluids that meet at least one of the following conditions for non-flammability: •...

  • Page 75: Kits And Accessories

    Kits and Accessories Kits and Accessories PrecisionFlo LT Recommended Spare Parts Part Number Description 234282 Advanced control manual set in binder 244283 Standard control manual set in binder 117782 Power Supply 246496 Board, Circuit Assy, HI-Temp Press Sensor 246517 Board, Circuit Assy, Ambient Press Sensor...
  • Page 76 Kit, Helical gear set repair (high resolution) 123409 Kit, cable for adding HG6000 (Helical) meter Cables 118342 Cable kit, PrecisionFlo LT to personal computer 117774 Cable, automation analog, 40 ft. (12.9 m) 198731 Cable, High Flex Operation, 20 ft. (6.11 m) 198296 Cable, High Flex Operation, 60 ft.
  • Page 77 Kits and Accessories Filters and Accessories C59725 Dual filter bank with gauges, ball and drain valves, 30 mesh element, 5000 psi, (345 bar, 34.5 MPa) 1-1/4” NPT Inlet 1” NPT Outlet C59547 Single filter kit, gauges, ball and drain valves, 30 mesh element, 5000 psi, (345 bar, 34.5 MPa) 1” C58997 Fluid filter, polyethylene support, 30 mesh element, 5000 psi (345 bar, 34.5 MPa) 1”...
  • Page 78 Kits and Accessories 918620 Tube/bearing repair kit, wide pattern 617870 Cable, PrecisionSwirl, 55’ 617829 Cable, PrecisionSwirl, automation, 40’ 233125 Extension cable, 6’ 233124 Extension cable 9’ 233123 Extension cable 15’ 241479 Motor kit 196008 Bellows (12-pack) 241569 Bearing Repair Tool Kit Tips, Nozzles and Adapters 918610 Swirl dispense tip 0.012”, (0.31 mm) carbide...
  • Page 79 Kits and Accessories 270035 Streaming tip, 0.035 (0.89 mm) orifice 270037 Streaming tip, 0.037 (0.94 mm) orifice 270039 Streaming tip, 0.039 (0.99 mm) orifice 270041 Streaming tip, 0.041 (1.04 mm) orifice 270043 Streaming tip, 0.043 (1.09 mm) orifice 270059 Streaming tip, 0.059 (1.50 mm) orifice C08224 Shower tip, 6 orifices, 0.021”...
  • Page 80 Kits and Accessories 686608 PTFE hose, SS braid, 0.617 (15.67 mm) ID, 25’ (7.62 m) long, 4000 psi (276 bar, 27.6 MPa) C12288 PTFE hose, SS braid, 0.51 (12.95 mm) ID, 10’ (3.05 m) long, 1500 psi (103 bar, 10.3 MPa) 514428 PTFE hose, SS braid, 0.25 (6.35 m) ID, 10’...

  • Page 81: Using The Precisionflo Lt I/O

    Using the PrecisionFlo LT I/O The PrecisionFlo LT uses several I/O signals to communicate with plant automation controllers. There are four digital inputs, four digital outputs, one analog input, and one analog output. All of these signals are routed to the I/O connec- tor on the top of the controller.
  • Page 82 If the automation controller uses optocouplers to receive digital I/O signals, the inputs must be designed for 24 VDC and the optocoupler emitter cathode must be con- nected to the PrecisionFlo LT 24 VDC common (pin 6). See F . 34.
  • Page 83 24 VDC From E-Stop The PrecisionFlo LT receives a flow rate or pressure The PrecisionFlo LT provides a signal that can be used analog command from the automation. The 0 to 10 VDC by the automation controller to monitor the emergency analog input is referenced to analog common on the stop switch position of the PrecisionFlo LT controller.

  • Page 84: Precisionflo Lt User Interface

    Appendix B Appendix B PrecisionFlo LT User Interface Screen Overview - Run Screen (Bead Control Mode) The purpose of this screen is to display the required run parameters. Description Possible Values Default Value Hour 0-23 Minute 0-59 1-31 Month 1-12...
  • Page 85 Appendix B Run Screen (Volume Control Mode) The purpose of this screen is to display the required run parameters. Description Possible Values Default Value Hour 0-23 Minute 0-59 1-31 Month 1-12 Year 2000-2099 Date Format mm/dd/yy-dd/mm/yy mm/dd/yy Pressure 0-9999 Pressure Units psi or bar Actual Flow Rate 0-9999 cc/min...
  • Page 86 Appendix B Run Screen (Batch Dispense Mode) The purpose of this screen is to display the required run parameters. Description Possible Values Default Value Hour 0-23 Minute 0-59 1-31 Month 1-12 Year 2000-2099 Date Format mm/dd/yy-dd/mm/yy mm/dd/yy Pressure 0-9999 Pressure Units psi or bar Actual Flow Rate 0-9999 cc/min...
  • Page 87 Appendix B Run Screen (Pressure Control Mode) The purpose of this screen is to display the required run parameters. Description Possible Values Default Value Hour 0-23 Minute 0-59 1-31 Month 1-12 Year 2000-2099 Date Format mm/dd/yy-dd/mm/yy mm/dd/yy Pressure 0-9999 Pressure Units psi or bar Command 0-100%...
  • Page 88 Appendix B Setup Screen 1 Dispense Screen The purpose of this screen is to display the required run parameters. Notes: 1. Reverse image to indicate an input cell only if Run Mode Bead Adjust is enabled. Bead Scale Control Mode Bead Control 10.0 Target Volume...
  • Page 89 Appendix B Setup Screen 2: Calibrate Screen (Bead Control Mode) 2548 100% Command Flow cc/min In Manual Mode, press to begin calibration Calibration required (valid) Press to see details Output 345 psi 2134 cc/min Desired Output 333 psi 2115 cc/min Kp 105 346 psi Max System Output...
  • Page 90 Appendix B Setup Screen 2: Calibrate Screen (Batch Dispense and Volume Monitor Modes) 2500 100% Command Flow In Manual Mode, press to begin calibration Calibration required (valid) Press to see details Output 1254 psi Desired Output 1250 psi Result Kp 105 Ki 4 Max System Output 3250 psi...
  • Page 91 Appendix B Setup Screen 2: Calibrate Screen (Pressure Control Mode) 2500 100% Command Pressure In Manual Mode, press to begin calibration Calibration required (valid) Press to see details Output 1254 psi Desired Output 1250 psi Result Kp 105 Ki 4 Max System Output 3250 psi Dispense...
  • Page 92 Appendix B Setup Screen 3: Other Screens Language English Control Mode Bead Control Command Mode Analog Pressure Loop Kp Pressure Loop Ki Job End Mode Timer Job End Delay seconds Run Mode Bead Scale? Regulator Pre-Charge Gun On Delay Gun Off Delay Reg On Delay Reg.
  • Page 93 Appendix B Low Volume Alarm High Volume Warning Low Flow Rate Alarm High Flow Rate Alarm Low Pressure Warning High Pressure Warning Computed Target Warning Description Possible Values Default Value Language English, Spanish, English French, German, Italian, Portuguese, Japanese, or Korean Date Format dd/mm/yy or mm/dd/yy mm/dd/yy...
  • Page 94 Appendix B 2 to 99 pulses 4 pulses Pulses per Flow Reading note 3 Flow Compensation Pivot 0 to 100% note 4 Point Flow Fault Time 1 to 99 seconds 2 seconds Enable Run Mode Bead Yes or No Adjust? Screen Saver Timeout note 5 0 minutes...

  • Page 95: Theory Of Operation

    Appendix C Appendix C Theory of Operation Fault Present - This bit is RESET under the following conditions: Input and Output Signals 1. No Faults (alarms or warnings) are active. In Cycle - In Cycle signal is set at the beginning of a dis- Terminology pense cycle.

  • Page 96: Operation Modes

    Manual mode. and VOLUME REQUEST signals from the automation unit. When a fault is detected, the PrecisionFlo LT control sets the FAULT present signal HIGH, and may set the DISPENSER READY signal LOW. Fault detection can also occur during manual dispensing.

  • Page 97: Jobs

    Volume Monitor and Batch modes. memory. The most recent jobs can then be viewed on the “Job” screen or by using the Graco Shell Menu Sys- In Pressure Mode, there are no flow meters available tem. The information stored with each job is as follows.

  • Page 98: Typical Job Cycle

    20 msec. DELAY expires. 5. Dispense gun opens after the GUN ON DELAY, 13. The PrecisionFlo LT control checks if a GUN OFF immediately if the delay is set to zero. DELAY has been set by the user.

  • Page 99: Typical Dispense Cycle

    Typical Dispense Cycle Typical Dispense Cycle The In Cycle signal is set at the beginning of a dispense cycle, which starts with a Dispense Gun signal from the automation unit. Bead Control / Vol. Monitor / Pressure Control Using I/O for Job End Dispense Gun Input Signal Regulator...

  • Page 100: Typical Bead Control / Vol. Monitor / Pressure Control

    Typical Bead Control / Vol. Monitor / Pressure Control Typical Bead Control / Vol. Monitor / Pressure Control Using Timer for Job End Dispense Gun Input Signal Regulator Valve In Cycle Output Signal . 39 A = Regulator On Delay B = Regulator Off Delay C = Gun On Delay D = Gun Off Delay...

  • Page 101: Typical Batch Dispense Cycle (I/O)

    Typical Batch Dispense Cycle (I/O) Typical Batch Dispense Cycle (I/O) Using I/O for Job End Dispense Gun Input Signal Regulator Valve Volume Not Reached, Job Aborted by I/O Job Complete Input Signal In Cycle Output Signal Min Volume Output Signal Volume Reached, Job Ended Automatically Job Complete Input Signal...

  • Page 102: Typical Batch Dispense Cycle (Timer)

    Typical Batch Dispense Cycle (I/O) Typical Batch Dispense Cycle (Timer) Using Timer for Job End Dispense Gun Input Signal Regulator Valve Volume not reached, job aborted by timer In Cycle Output Signal Min Volume Output Signal Volume reached, job ended automatically In Cycle Target Volume Reached Output Signal...

  • Page 103: Continuously Running Applications

    Continuously Running Applications Continuously Running Applications In some cases the target volume for a job is not known. Another situation where it may be desirable to set the An example of a case where the target volume is target volume to be zero is when there are too many unknown is a continuously running system.

  • Page 104: Flow Rate Calculation

    Flow Rate Calculation Flow Rate Calculation The pulses per flow reading value is calculated by the Example: pulses per reading = 4 pulses system based on the K-factor and the flow rate entered during flow calibration. Flow Rate = 400 cc/min K-factor = 3500 pulses/liter = 3.5 pulses/cc This gives a pulse rate of 23.3 pulses/second or 43 milli- 4 pulses...

  • Page 105: Volume Compensation

    Flow Rate Calculation Volume Compensation Endpoint Flow Command < Flow Command > Volume compensation is used when the PrecisionFlo LT Adjustment Flow comp Pivot Flow comp Pivot system is operated in bead control mode. The system Point Point measures the actual flow rate and adjusts the pres- Flow rate <...

  • Page 106: Ethernet Kit 118329

    The module can be configured using a graphical web The Ethernet kit for PrecisionFlo LT provides for a way to based configuration connection or by using a serial con- communicate with the LT via an industrial or office net- nection to the module.
  • Page 107 Appendix D 309738L...

  • Page 108: Graco Standard Warranty

    With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.

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