THORLABS PACU2 User Manual
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THORLABS PACU2 User Manual

Pure air circulator unit
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PACU2
Pure Air Circulator Unit
User Guide

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Summary of Contents for THORLABS PACU2

  • Page 1 PACU2 Pure Air Circulator Unit User Guide...

  • Page 2: Table Of Contents

    Pure Air Circulator Unit Table of Contents Chapter 1 Introduction ......................... 1 1.5.1 Specifications ..............................3 1.5.2 Graphs ................................. 4 1.5.3 Mechanical Drawings ............................5 1.6.1 Front and Back Panels ............................7 Chapter 2 Safety ........................... 8 Chapter 3 Installation ........................9 Chapter 4 Operation ........................
  • Page 3 Pure Air Circulator Unit Chapter 8 Command Line Operation ................... 25 Chapter 9 Disposal ........................29 Chapter 10 Thorlabs Worldwide Contacts (Required) ..............30...

  • Page 5: Chapter 1 Introduction

    (VOC). The unit is designed to operate in a closed-loop fashion. The exhaust or clean air enters a cavity that is sealed from the external environment and exits that cavity back into the PACU2. The PACU2 is ideally suited for the continuous filtering and circulation of extremely clean, dry air (or nitrogen) in an optical cavity.
  • Page 6 If the PACU2 is used in an open-loop system, the moisture trap should be monitored often and replaced if saturation has occurred, since the filter is removing moisture and particulate from the surrounding environment.

  • Page 7: Specifications

    Pure Air Circulator Unit Chapter 1: Introduction Technical Data 1.5.1 Specifications Temperature and Relative Humidity Sensor Specifications Ambient Temperature Range (Accuracy) -40 - 125 °C (±0.2 °C) Ambient Relative Humidity Range (Accuracy) 0 - 100% (±1.8% ) Inlet Relative Humidity Range (Accuracy) 0 - 100% (±1.8%) 0 - 5% (±0.5%), Outlet Relative Humidity Range (Accuracy)

  • Page 8: Graphs

    Pure Air Circulator Unit Chapter 1: Introduction 1.5.2 Graphs 3.0 L Chamber Being Purged at Flow Rate of 3.0 L/min.: Figure 3 Typical Linear Graph, Relative Humidity vs. Time Page 4 CTN021029-D02...

  • Page 9: Mechanical Drawings

    Pure Air Circulator Unit Chapter 1: Introduction 1.5.3 Mechanical Drawings Figure 4 Mechanical Drawing Rev. A, January 01, 2024 Page 5...
  • Page 10 Filter1 Assembly Filter3 Assembly Filter2 Assembly Pump Drawer Assembly Figure 5 Identification of PACU2 The tables below list the standard components of PACU2: Component PACU2 Enclosure Assembly Typical Red Enclosure Drawer Assembly Drawer that can be Pushed and Pulled Desiccant Replacement Filter,...

  • Page 11: Front And Back Panels

    Callout Description Push-To-Connect Fitting for Inlet Push-To-Connect Fitting for Outlet Flowmeter Lock Handle USB Port Operation Buttons (3 Places) Power Switch Display Pump Speed Adjustment Knob Table 2 Components of PACU2 Front panel Rev. A, January 01, 2024 Page 7...

  • Page 12: Chapter 2 Safety

    Description AC Power Cord Connector Fuse Tray Table 3 Components of PACU2 Back panel Simplified Declaration of Conformity The full text of the EU declaration of conformity is available at the following internet address: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=6485 FCC Designation (Required if Relevant) This device complies with part 15 of the FCC Rules.

  • Page 13: Chapter 3 Installation

    The components inside this instrument are ESD sensitive. Take all appropriate precautions to discharge personnel and equipment before making any electrical connections to the unit. Please read the instruction manual carefully before operating the PACU2 unit. All statements regarding safety and technical specifications will only apply when the unit is operated correctly.
  • Page 14 Lay the packing box on a flat surface and tear off the adhesive tape on the outside of the packing carton. Open the carton and take out the tubing. Take out the upper insert and the PACU2. Remove with care to protect the surface and prevent scratches. Take out the lower insert, open it and remove all attachments.

  • Page 15: Chapter 4 Operation

    We recommend that the supply line tubing be a good-quality, low outgassing type. This kind of semi- flexible tube maintains high integrity with less cross- contamination. We use 0.18" ID x 1/4" OD, 1 MPa @ 20 °C low outgassing tubing throughout the unit, 4 m of which is included with the PACU2 package. •...
  • Page 16 Starting the PACU2 To operate the PACU2, ensure that both the power cable and the tubing are securely connected. Press the power switch to turn on the unit. Upon turning on, an initialization screen will appear on the LCD, and the device will begin powering up.
  • Page 17 To adjust the flow rate output, rotate the pump speed adjustment knob located to the right of the LCD screen. The LCD screen will display a varying pump speed percentage as the knob is turned. The PACU2 offers a pump speed tuning function with a resolution of 0.1%, and a range of 0% to 100%.
  • Page 18 Pure Air Circulator Unit Chapter 4: Operation Figure 16 Reset Counter Press button 2 in the lower middle of the screen to select FTR1, press button 3 in the lower right corner of the screen to select FTR2+ FTR3, or you can press button 1 in the lower left corner of the screen to cancel the reset and go back to the main screen.
  • Page 19 Pure Air Circulator Unit Chapter 4: Operation Figure 18 Reset or Not Dark Mode If you need an environment that is completely free of stray light interference, you can turn the unit to “Dark Mode” without affecting the normal operation of the unit. 1.

  • Page 20: Chapter 5 Maintenance And Cleaning

    Pure Air Circulator Unit Chapter 5: Maintenance and Cleaning Figure 20 “Dark Mode” or Not 3. Press any of the three buttons to exit “Dark Mode” and go back to the main screen. Figure 21 Exit “Dark Mode” Chapter 5 Maintenance and Cleaning Fuse Replacement The fuse is in the fuse drawer below the power inlet.

  • Page 21: Filter Replacement

    PACU2F1 and PACU2F3 may be inspected by opening the drawer in the front panel of the PACU2 unit. Both PACU2F1 and PACU2F3 are indicating when saturated and can easily be inspected for changing by observing their indicating color change to pink (as shown in Figure 24).

  • Page 22: Pacu2F1 And Pacu2F3 Status

    Pure Air Circulator Unit Chapter 5: Maintenance and Cleaning 5.2.2 PACU2F1 and PACU2F3 Status Warning: Risk of Electrical Shock Please check the supply voltage of the system before plugging in the unit. Make sure the included power cord is connected to a properly grounded outlet (90 – 240 VAC; 50 – 60 Hz). •...
  • Page 23 Pure Air Circulator Unit Chapter 5: Maintenance and Cleaning Be careful when opening the drawer to prevent the unit from tipping over. After replacing the filter, secure the clamps with new zip ties to avoid additional vibration and noise. 1. Pull up the handle lock on the front panel and pull outward to open the drawer (as shown in Figure 23). 2.

  • Page 24: Regeneration Of Pacu2F1 And Pacu2F3

    Replace PACU2F3 3. Once the drawer has been opened, you will have direct access to all three filters within the PACU2 system. Before any filters can be removed, you must disconnect all tubing from the filters by loosening the push-to- connect fittings connection.

  • Page 25: Adjust The Gap

    Pure Air Circulator Unit Chapter 5: Maintenance and Cleaning 2. For the regeneration of Indicating DRIERITE®, the granules may be spread in layers one granule deep and heated for 1 hour at 210° C or 425° F. High temperatures can alter the crystal structure and render the desiccants permanently inactive.
  • Page 26 Pure Air Circulator Unit Chapter 5: Maintenance and Cleaning Gap (4 Places) Figure 30 Gap Between the Drawer Panel and the Front Panel How to adjust the gap： • Open the drawer, find the adjustment handle at the bottom of the drawer. Right Adjustment Handle Left Adjustment Handle （）...

  • Page 27: Chapter 6 Troubleshooting And Repair

    Please disconnect all power sources before opening the drawer. Make sure the power cable is disconnected from the unit. Below are a few checks to help in troubleshooting problems that may arise. Please contact your local Thorlabs Technical Support office with any questions.

  • Page 28: Chapter 7 Software Gui

    Chapter 7 Software GUI Software enabling remote control of the unit is available for download from the Thorlabs website. After installing the software package and connecting the host PC to the unit via the USB port on the front panel, the PC can control the unit using either a GUI or through a command-line interface, as discussed in Chapter 8.
  • Page 29 (e.g. any adjustments made to the pump power using the front panel is registered by and used to update the status of the GUI). PACU2 GUI: Hardware Requirements • Processor (CPU): ≥1 GHz • Memory (RAM): 2 GB •...
  • Page 30 Pure Air Circulator Unit Chapter 8: Command Line Operation Flow Control: None The basic structure of the interface is a keyword followed by either an equals sign (=) or a question mark (?). The = or ? character determines if the string is a command or a query. All strings, commands, and queries must be terminated by a carriage return (CR) or by pressing the Enter key on the computer.
  • Page 31 IDN? – Device Information This command retrieves the hardware and firmware versions. Return: THORLABS PACU2 HWx.x FWx.x Where HW is the hardware version, and FW is the firmware version. INT=n; INT? – Device Power Intensity The INT command allows users to set or query the device's pump power intensity percentage.
  • Page 32 Pure Air Circulator Unit Chapter 8: Command Line Operation HUI? – Inlet Humidity Queries the current inlet humidity of the device. Return: HUI=n Where n is the current inlet humidity of the device. HUO? – Outlet Humidity Queries the current outlet humidity of the device. Return: HUO=n Where n is the current outlet humidity of the device.
  • Page 33 Contact Thorlabs for more information. Waste treatment is your own responsibility. “End of life” units must be returned to Thorlabs or handed to a company specializing in waste recovery. Do not dispose of the unit in a litter bin or at a public waste disposal site. It is the user’s responsibility to delete all private data stored on the device prior to disposal.
  • Page 34 Pure Air Circulator Unit Chapter 10: Thorlabs Worldwide Contacts (Required) Chapter 10 Thorlabs Worldwide Contacts (Required) For technical support or sales inquiries, please visit us at for our most up-to-date www.thorlabs.com/contact contact information. Corporate Headquarters China Thorlabs, Inc. Thorlabs China 43 Sparta Ave Room A101, No.100, Lane 2891,...
  • Page 36 www.thorlabs.com...

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