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Retrotec DM-2A mark II User Manual

Dual channel pressure gauge
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Retrotec Model DM-2A mark II
Dual Channel Pressure Gauge
User Guide

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  • Page 1 Retrotec Model DM-2A mark II Dual Channel Pressure Gauge User Guide...
  • Page 2 Revision History Jan 29, 2008 0.00 Mark II, Jeff Jan 29, 2008 0.01 Colin copied to Word 2003 and edited it. Jan 31, 2008 0.02 Joe copied it to Word 2004 and edited it Feb. 22, 2008 Steve 0.03 Revised for documentation re-design and new style guide...
  • Page 3 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Retrotec Model DM-2A mark II Dual Channel Pressure Gauge User Guide Retrotec Energy Innovations, Ltd. DM-2A Mark II 2008-02-22...

  • Page 4: Dm-2A Mark Ii Dual-Channel Pressure Gauge

    Copyright © 2005-2008 Retrotec Energy Innovations, Ltd. All rights reserved. This document contains materials protected under International Copyright Laws. All rights reserved. No part of this document may be copied or reproduced in any form or by any means without the prior written consent of Retrotec Energy Innovations, Ltd.
  • Page 5 User Manual About Retrotec Energy Innovations Retrotec Energy Innovations, Ltd. manufactures blower doors (or door fans) that are used in over 40 countries to measure the leakage rate of buildings, houses, rooms, ductwork and enclosures. Retrotec’s Windows software uses the leakage results to calculate energy loss,...
  • Page 6 This is enforced by Lloyds of London shipping standards. Retrotec air current testers are used as air movement detectors in a variety of applications but mostly to find leaks in the above applications so the requirements of these standards can be met.

  • Page 7: Table Of Contents

    DM-2A Mark II Dual-Channel Pressure Gauge User Manual Table of Contents Section 1 Getting Started Installing the Batteries Checking Battery Health AC Power Adapter Exploring the Display and Keypad Buttons Viewing the Display Screen Using the Keypad Buttons Section 2...
  • Page 8 Using Advanced Configuration Modes Accessing Configuration Modes Preset Configuration Choosing Custom Configuration Options Using Range Configuration Options Appendix A Configuring and Using the DM-2A for Specific Standards CGSB 149.10 Configuration Canadian ecoENERGY Configuration DS/EN 13829 Appendix B Glossary of Terms and Abbreviations...
  • Page 9 Introducing the Retrotec DM-2A mark II Congratulations on the purchase of your new Retrotec DM-2A mark II Dual-Channel Digital Micromanometer and Control. This high-quality, precision measuring instrument is the most advanced of its type and represents the state-of-the-art for air-tightness testing, enclosure leakage measurement, and building performance assessment.
  • Page 10 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Getting Started Retrotec Energy Innovations, Ltd. DM-2A Mark II 2008-02-22...

  • Page 11: Getting Started

    Section 1 Getting Started Before you can begin using your new DM-2A mark II gauge, there are a few quick tasks you’ll need to perform. You’ll find that setting up your gauge for first use and exploring its basic operations is a relatively simple operation that takes just a few moments. In this section, you’ll learn to install the batteries, determine battery health, and/or attach the power adapter.

  • Page 12: Checking Battery Health

    3. Replace the battery compartment panel and securely tighten the screw. The DM-2A mark II contains a built-in NiMH battery charger. Other battery types (such as alkaline batteries) can be used to power the DM-2A but you MUST remove these batteries before attaching an external power source.

  • Page 13: Ac Power Adapter

    DM-2A Mark II Dual-Channel Pressure Gauge User Manual Getting Started Under typical operation, the DM-2A will operate for many hours on a set of fully charged batteries. 4. To turn off the gauge, press and briefly hold the O button. The display will become blank indicating the gauge is no longer operational.

  • Page 14: Exploring The Display And Keypad Buttons

    Exploring the Display and Keypad Buttons Your Retrotec DM-2A mark II gauge features a touch-sensitive keypad that enables you to use the gauge as an interface to the fan in use. The gauge is essentially comprised of two user components—a display window and a set of specialized keypad buttons.

  • Page 15: Using The Keypad Buttons

    DM-2A Mark II Dual-Channel Pressure Gauge User Manual Getting Started The following list explains what each of the information labels printed around the perimeter of your display screen represent: • Baseline Indicates either the baseline pressure that will be deducted from the PrA value or the current battery health status.
  • Page 16 8 representing up, left, right, and down (respectively). Besides the numeric and directional functions, keys also include these secondary functions: The DM-2A mark II can display measurements and calculate results in The DM-2A mark II can display measurements and calculate results in a variety of units.
  • Page 17 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Getting Started • Velocity Displays the air velocity. This mode requires that a pitot tube be installed. • Velocity Flow Displays the flow calculated from the velocity and cross- sectional area of the measured duct.
  • Page 18 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Getting Started Press the a keypad button to turn the automatic zeroing function on or off. Automatic zeroing sets the gauge to automatically zero itself every 10 seconds. Generally speaking, the DM-2 should be used with auto zero feature on.
  • Page 19 Pressing this button once while the gauge is off turns it on aCkligHt and displays the Retrotec introduction screen. Pressing the button a second time displays the main operational display screen. While the gauge is on, you can press this button to toggle the backlighting illumination for the display screen on or off.
  • Page 20 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Getting Started NOTES Retrotec Energy Innovations, Ltd. DM-2A Mark II 2008-02-22...

  • Page 21: Working With The Setup Screen

    Section 2 Working with the Setup Screen If you’re preparing your DM-2A mark II gauge for first-time use, or need to make adjustments to the gauge’s current setup configuration, this section will help guide you through the process and briefly explain the available options. Follow the steps in this section to access the setup and mode options.
  • Page 22 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Working with the Setup Screen 4. Press the e (Left), and/or (Right) keypad buttons to display the Enable/ nteR Disable Device screen (as shown next). A list of device names is displayed in column format.

  • Page 23: Enabling And Disabling Modes

    7. Device ranges and/or configurations can also be custom-configured if needed. For example, if you don’t require the low flow ranges for a Retrotec 2000 fan, you can configure the gauge to disable the L4, L2, and L1 ranges. This will prevent those ranges from being displayed when you press the R keypad button.
  • Page 24 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Working with the Setup Screen 4. Press the e (Left), and/or (Right) keypad buttons to view the Enable/Disable nteR Modes screen. In this screen, you can enable or disable measurement modes select the units of measurement for that mode.

  • Page 25: Mode Extrapolation Slope (N)

    The Power Down feature (shown next) is designed to maximize battery power by enabling your DM-2A mark II gauge to automatically turn itself off when it has been inactive for set time period. This feature is set in hours within a range between 0 and 255 hours. Applying a 0 value will disable the Power Down feature, meaning the DM-2 will never automatically shut down.

  • Page 26: Area Units

    DM-2A Mark II Dual-Channel Pressure Gauge User Manual Working with the Setup Screen The Power Down feature affects normal operation during testing. Be certain to allow for typical testing operations when choosing a setting. Area Units You can choose your unit measure preference for the area measurements that are displayed on the gauge using the Area setup option (shown next).

  • Page 27: European Decimal Conventions

    (.) to separate the integer portion of a number from the fractional portion. Your DM-2A mark II gauge supports both conventions. Choosing Yes as the European option (shown next) sets the decimal to a comma, while choosing No applies a period. For example, ten and one half pascals would be displayed as 10,5.

  • Page 28: Sig Figs

    DM-2A Mark II Dual-Channel Pressure Gauge User Manual Working with the Setup Screen Sig Figs The Significant Figures – or ‘Sig Figs’ – feature controls the number of significant digits displayed and allows an extra digit, round to the nears 5 to be displayed. The available options are: 2.5 Two significant figures plus a third figure rounded to either 0 or 5.
  • Page 29 Reverse Control mode is enabled by setting the Reverse Mode option to Yes. For more information on adjusting your gauge for specific measurement standards, see Appendix A, Configuring and Using Your DM-2A Mark II Gauge for Specific Standards discussed later in this user guide. Retrotec Energy Innovations, Ltd.
  • Page 30 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Working with the Setup Screen NOTES Retrotec Energy Innovations, Ltd. DM-2A Mark II 2008-02-22...

  • Page 31: Connecting Your Gauge To A Fan

    Section 3 Connecting Your Gauge to a Fan Connecting your DM-2A mark II to your Retrotec door fan or other similar device is a straightforward operation. Your Retrotec umbilical cord includes the necessary tube and cable connections. The tubes are color-coded to match other system hardware. For example, the red pressure hose connects to the red pressure port on the top end of the gauge.
  • Page 32 Power on the top of the gauge. External power is provided either by the AC adapter attached to an on-site AC power source, or (if available) power available from the fan. To continue the set up operation and connect your gauge to the Retrotec door fan, follow these steps: 5.
  • Page 33 10. Your Retrotec DM-2A mark II gauge and door fan are now connected and ready for you to perform basic test operations.
  • Page 34 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Connecting Your Gauge NOTES Retrotec Energy Innovations, Ltd. DM-2A Mark II 2008-02-22...

  • Page 35: Exploring Basic Test Operations

    Section 4 Exploring Basic Test Operations Now that your DM-2A mark II gauge and fan are properly connected you’re ready to begin taking measurements. A good place to start is to conduct a simple pressure-pressure test. Doing this, you’ll learn how to turn on the gauge, choose a Mode, activate Time Average and Auto Zero features, and control fan speed and pressure using Set Speed, Set Pressure, and Jog/Hold.

  • Page 36: Using Time Average

    DM-2A Mark II Dual-Channel Pressure Gauge User Manual Basic Operations Using Time Average 3. The time averaging feature calculates the average pressure over a given time period. Pressing the t keypad button enables you to cycle through the range of time-averaging intervals: Off, 1s, 2s, 4s, 8s, 10s, 20s, 1m, and 2m (where s represents seconds and m represents minutes).

  • Page 37: Setting The Fan Speed

    DM-2A Mark II Dual-Channel Pressure Gauge User Manual Basic Operations Using the Auto Zero feature consumes additional power that may be a consideration when operating your gauge on batteries alone. Setting the Fan Speed 5. Press the S keypad button. Notice the Fan Speed %: prompt appears on the peed gauge display screen followed by a blinking cursor (as shown next).

  • Page 38: Using Jog/Hold

    DM-2A Mark II Dual-Channel Pressure Gauge User Manual Basic Operations 6. While the Set Speed feature is active, the current speed of the fan will be displayed in the lower-right corner of the display screen (as shown next). The pressure values displayed will remain relatively constant, although minute changes are to be expected.

  • Page 39: Setting The Pressure

    DM-2A Mark II Dual-Channel Pressure Gauge User Manual Basic Operations 9. Press the J keypad button again. Notice that Hold now appears at the top centre of your gauge display screen (as shown next). In this state, your gauge will hold the current measurements.
  • Page 40 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Basic Operations The Set Pressure feature will cannot be used in free-air tests. 13. For example, enter a value of 25 and press the e keypad button. The fan speed on nteR the test device will gradually increase until the pressure value you entered is matched by the value displayed next to the PrA reading (as shown next).

  • Page 41: Using Advanced Configuration Modes

    Section 5 Using Advanced Configuration Modes The DM-2A mark II gauge has several different pre-programmed test measurement mode configurations that enable you to quickly calculate various measurements in the field. Accessing Configuration Modes By default, your gauge comes configured with a number of commonly used modes pre- enabled.

  • Page 42: Preset Configuration

    Advanced Modes Preset Configuration By default, your DM-2A mark II gauge is set to use a preset unit measurement configuration for each of the available modes. These defaults affect how all measurements are displayed. The default unit measurement configurations are listed in the following table:...

  • Page 43: Using Range Configuration Options

    Each fan model that your gauge can control can use a unique set of flow ranges. Your DM-2A gauge can be configured to specific range configuration for your selected device. The range configuration setting you select in turn affects all calculated values displayed by your gauge.
  • Page 44 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Advanced Modes NOTES Retrotec Energy Innovations, Ltd. DM-2A Mark II 2008-02-22...

  • Page 45: Configuring And Using The Dm-2A For Specific Standards

    You can configure your DM-2A mark II gauge to adhere to virtually any code or standard in a few moments using the procedures described previously in this user guide. See Accessing Configuration Modes in Section 5 Using Advanced Configuration Modes.

  • Page 46: Canadian Ecoenergy Configuration

    2A gauge will provide these values automatically without doing a multipoint test or you can use Retrotec’s Door-Fan 3.0 software to perform the test manually or even automatically with Retrotec model Q systems such as the Q46, Q4E and Q56.
  • Page 47 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Specific Configurations To configure your DM-2A mark II gauge for the Canadian ecoEnergy requirements, apply these settings: Canadian ecoENERGY Configuration Mode Setup Pressure Flow EfLA EqLA @ 10.0 Pa Air Changes @ 50.0 Pa...

  • Page 48: Ds/En 13829

    European Sig Figs Reverse Mode DS/EN 13829 is a multi-point test. However, the DM-2A mark II can also provide for quick single-point checks of the enclosure. To perform a single-point test, follow these steps: 1. Assess and measure the Envelope Area as specified in the standard.
  • Page 49 ReSSuRe either Air Permeability or Specific Leakage Rate @ 50.0 Pa. 9. Results may be read directly from the DM-2A mark II. 10. In order to record both Air Permeability and Specific Leakage Rate, you will need to re-enter the Envelope Area and Net Floor Area values according to your measurements and/or calculations.
  • Page 50 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Specific Configurations NOTES Retrotec Energy Innovations, Ltd. DM-2A Mark II 2008-02-22...

  • Page 51: Glossary Of Terms And Abbreviations

    DM-2A Mark II Dual-Channel Pressure Gauge User Manual Glossary Appendix B Glossary of Terms and Abbreviations As you learn how to use your gauge and/or consult sections within this guide, you may encounter abbreviations that you’re unfamiliar with. • ACH Air changes per hour.

  • Page 52: Abbreviations

    DM-2A Mark II Dual-Channel Pressure Gauge User Manual Glossary • Flow Pressure The pressure difference between inside the fan (in the flow stream) and ambient air, outside the fan. • Room Pressure The pressure difference between inside the building/room under test and the ambient outside air.

  • Page 53: Getting Help With Your Gauge

    Appendix C Getting Help With Your Gauge As you become familiar with using your DM-2A mark II gauge, you may have questions with its basic operations and/or functions or you may encounter a situation that seems out of the ordinary. There is often a simple answer or solution to solving common problems.
  • Page 54 DM-2A Mark II Dual-Channel Pressure Gauge User Manual Getting Help 3. Press the e keypad button to display the Enable/Disable Device screen nteR showing a list of device profile names. A Yes status in the right-hand column indicates the device profile is enabled; a No indicates the profile is currently disabled.

  • Page 55: Getting Help

    Getting Help Getting Help If you are unable to resolve a problem you’ve encountered or you suspect there may be a more complex problem with your gauge, contact Retrotec using one of the options discussed in the following section. Main Offices Retrotec Energy Innovations Ltd.

  • Page 56: Warranty Information

    Getting Help Warranty information Your limited warranty covers defects in materials and workmanship in “Products” manufactured by Retrotec to the extent of repair or replacement except in the case of air current testers where replacement is the only option provided all shipping costs are paid by the first end user.

  • Page 57: Warranty On Refurbished Equipment

    Products Purchased from Resellers If you have bought directly from a Retrotec Reseller, call the company you bought it from and describe your problem. They may be able to respond more quickly and save you shipping costs. Your reseller will decide whether: •...

  • Page 58: Field Replacement/Repair

    If Retrotec agrees that Warranty Replacement Parts are required, Retrotec will ship the necessary parts to you free of charge, and at Retrotec’s expense, using the carrier and method of our choice. Rush or Express shipments will be at your expense.

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