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DG-700 - Air Solutions Inc.

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1. Air handler flow measurements Exhaust fan flow measurements Building depressurization and combustion safety testing 1 1 Feature List LJ 1 l a Pressure Measurements Simultaneous display of 2 independent differential pressure channels A and B Each pressure channel has a range of 1 250 Pascals to 1 250 Pascals Accuracy of pressure channels is 1 of reading or 2 times the resolution whichever is greater Auto ranging with 0 1 Pascal resolution Choice of pressure units Pascals or Inches w c Specialized Baseline feature on Channel A allows user to measure and record a baseline pressure reading and then display the baseline adjusted pressure reading 0 1 1 b Auto Zeroing Auto zeroing feature for both measurement channels automatically adjusts for sensitivity to position and operating temperature during operation automatically activated every 10 seconds 0 1 1 c Time Averaging Choice of 4 time averaging options 1 second 5 second 10 second and Long Term average The time averaging feature stabilizes readings when measuring fluctuating signals e g windy conditions 0 1 1 d Air Flow and Velocity Measurements The DG 700 will calculate and display air flow readings on Channel B for the following Energy Conservatory test devices choice of units cubic feet per minute CFM meters per hour m hr liters per second 1 s Model 3 Minneapolis Blower Door fans 1
2. 15 Operating Instructions for the DG700 Chapter 4 _Pressure Flow 50 and 25 Modes 4 5 Changing the Leakage Units Channel B in units of CFM m hr I s in and cm The default air flow unit is CFM To change the leakage units for Channel B press the UNITS button The selected leakage units are shown on the gauge display directly below the Channel B readings The pressure unit for Channel A is always Pascals when in the Pressure Flow 50 or 25 modes unis When in the Pressure Flow 50 or 25 operating modes the DG 700 can display leakage results on UNITS 4 6 Changing the Time Averaging Period The selected time averaging period is shown in the TIME AVG portion of the gauge display See To change the selected time averaging period for both Channel A and B press the TIME AVG button AVG Section 1 5 for an overview of the time averaging periods 4 7 Using the Baseline Pressure Feature in Pressure Flow Mode The BASELINE feature on Channel A allows the user to measure and record a START ENTER baseline pressure reading and then display the baseline adjusted pressure reading This feature is commonly used during both building and duct airtightness test procedures where the user wishes to display the actual change in building or duct pressure caused by operation of the Blower Door or duct airtightness testing fan In order to accurately determine the change in pressure from the test fan the user first
3. 7 3 Troubleshooting Resetting the DG 700 13 14 14 14 14 14 15 15 15 16 16 16 16 16 17 17 19 19 19 19 20 20 20 20 20 21 22 23 23 23 23 23 23 24 24 24 24 24 24 24 25 7 4 AC Power Supply Specifications 25 APPENDIX A QUICK GUIDES FOR USING THE DG 700 WITH ENERGY CONSERVATORY TEST DEVICES 26 A 1 One Point 50 Pascal Building Depressurization Test using the Model 3 Minneapolis Blower Door and DG 700 Digital Gauge 26 A 2 One Point 25 Pascal Total Leakage Duct Pressurization Test Using the Seried B Minneapolis Duct Blaster and DG 700 Digital Gauge 28 A 3 Using the TrueFlow Air Handler Flow Meter and the DG 700 Digital Gauge 30 A 4 DG 700 Connections Needed to Conduct Automated Blower Door Tests 32 A 5 Using the DG 700 s Cruise Control Feature 36 Chapter 1__ Feature Summary Chapter 1 Feature Summary The DG 700 Pressure and Flow Gauge is a multi functional differential pressure gauge with 2 independent measurement channels In addition to providing high resolution pressure measurements the DG 700 is programmed to operate with other Energy Conservatory test devices to provide air flow measurements during building performance test procedures The DG 700 s dual pressure channels and air flow measurement features make it ideally suited for a wide range of building performance testing applications including Blower Door airtightness testing Duct system airtightness testing
4. Model 3 220V Minneapolis Blower Door fans BD 3 220 Model 4 220V Minneapolis Blower Door fans BD 4 Series A Minneapolis Duct Blaster fans DB A Series B Minneapolis Duct Blaster fans DB B Exhaust Fan Flow Meter EXH TrueFlow Air Handler Flow Meter TF Press the DEVICE button to toggle through the available test devices The currently selected test device is shown in the Device section of the gauge display The Model 3 110V Minneapolis Blower Door is the default test device when first entering the PR FL mode Once a test device is selected the configuration of the device i e flow rings door position or plate installed can be selected by pressing the CONFIG button The currently selected device configuration is shown in the Config section of the gauge display alee Operating Instructions for the DG700 Chapter 3 _Pressure Flow Mode 3 4 LO Displayed on Channel B Whenever LO appears on Channel B in the PR FL mode the pressure signal from the test device is too low to provide a reliable air flow reading The message LO appears on the Channel B display under the following two conditions LO is continuously displayed on Channel B when there is negligible air flow through the test device LO alternates with a flow reading when the air flow reading through the device is unreliable 1 e you are trying to measure a flow outside of the calibrated range of
5. Whenever or LO appears on Channel B in the Step 2 part of the PR AH procedure the DG 700 can not display a reliable air handler flow estimate The messages and LO appear on Channel B under the following three conditions e o ouen is continuously displayed when either the recorded NSOP reading or the current TFSOP reading is below 2 Pa LO is continuously displayed when there is negligible air flow through the test device LO alternates with a flow reading when the air flow reading through the device is unreliable i e you are trying to measure a flow outside of the calibrated range of the test device in its current configuration If possible you should change the test device configuration to match the flow rate being measured e g if using a Duct Blaster fan install a flow ring or a smaller flow ring 5 5 Changing the Air Handler Flow Units m hr and I s The default air flow unit is CFM To change the flow units for Channel B press the UNITS button while in the Step 2 part of the procedure The selected flow units are shown on the gauge display directly below the Channel B readings The pressure unit for Channel A is always Pascals when in the PR AH mode unns When in the PR AH mode the DG 700 can display air handler flow on Channel B in units of CFM UNITS 5 6 Changing the Time Averaging Period for the Step 2 Procedure TIME AVG button The selected time av
6. is displaying a baseline adjusted building pressure value TOF MOCEVS Fan d Remove the No Flow Plate from the Blower Door fan and install the Flow Ring which you think best matches the needed fan flow see Table to the right e Check and adjust if necessary the selected test Device i e fan and Configuration i e Flow Ring shown in the upper part of the gauge display to match the fan and Flow Ring being used in the test For example the Device icon for the Model 3 110V Blower Door fan is BD 3 and the Configuration icon for Ring A is A1 Press the DEVICE button to change the selected fan Press the CONFIG button to change the selected Flow Ring f Turn on the Blower Door fan If Using Crutse Control Turn the Blower Door speed control knob to the just on position i e from the off position turn the controller knob clockwise only until you feel the click and no farther the fan will not be turning Now press the Begin Cruise Enter button The Channel A display will now show the number 50 your target Cruise pressure Press the Start Fan Start button The Blower Door fan will now slowly increase speed until the building depressurization displayed on Channel A is approximately 50 Pascals If Manually Controlling Fan Turn on the Blower Door fan by slowly turning the fan controller clockwise As the fan speed increases the building depressurization displayed on Channel A should also increase Continue to increase th
7. B The flow rate estimate shown on Channel B is determined by continuously adjusting the measured air flow from the selected test device using a flow resistance correction factor calculated from the NSOP and TFSOP pressure readings Estimated Air Handler Flow Test Device Flow x Flow Resistance Correction Factor Note TFSOP is the operating pressure in the duct system at the same location used for the NSOP reading with a TrueFlow Metering Plate or Duct Blaster fan installed TFSOP is referred to in the TrueFlow Operation Manual as the TrueFlow System Operating Pressure To select the Pressure Air Handler Flow mode press the MODE button until the selected operating mode shown on the gauge display is PR AH 5 3 Changing the Selected Test Device and Configuration When in the Step 2 part of the PR AH procedure press the DEVICE button to select the DEVICE test device being used to measure air handler flow When using the PR AH mode the TrueFlow Metering Plates TF and the Duct Blaster fans DB A or DB B are the only compatible test devices Hs Operating Instructions for the DG700 Chapter 5 _Pressure Air Handler Flow Mode Once a test device is selected the configuration of the device 1 e flow rings or plate installed can be selected by pressing the CONFIG button The currently selected device configuration is shown in the Config section of the gauge display 5 4 or LO Displayed on Channel B
8. B Minneapolis Duct Blaster fans DB B Press the DEVICE button to toggle through the available test devices The currently selected test device is shown in the Device section of the gauge display Once a test device is selected the configuration of the device 1 e flow rings door position or plate installed can be selected by pressing the CONFIG button The currently selected device configuration is shown in the Config section of the gauge display Whenever or LO appears on Channel B in the PR FL 50 or 25 modes the DG 700 can not calculate a reliable leakage estimate The messages and LO appear on Channel B under the following three conditions is continuously displayed when the test pressure from Channel A is below the minimum test pressures listed below Estimating leakage results when the test pressure is below these values may result in large errors 10 Pascals when in the 50 mode 5 Pascals when in the 25 mode LO is continuously displayed when there is negligible air flow through the test device LO alternates with a flow reading when the air flow reading through the device is unreliable i e you are trying to measure a flow outside of the calibrated range of the test device in its current configuration If possible you should change the test device configuration to match the flow rate being measured e g install a flow ring or a smaller flow ring
9. B is now set up to display the air flow through the Blower Door fan it will read LO until the fan is turned on Note With the Blower Door fan off and the No Flow Plate installed the baseline adjusted building pressure on Channel A should be reading close to zero However if it is windy there may be fluctuations either side of 0 Install the appropriate flow ring and turn on the Blower BD OPEN Door fan Channel A will now display the baseline adjusted i m 4 building pressure while Channel B displays the flow i im _ through the Blower Door fan In the screen to the right the DG 700 is measuring an actual building depressurization is au 48 6 Pascals caused by the 3 564 CFM of air flow through the Blower Door fan open fan ue If the readings are fluctuating more than desired change the time averaging period to 5 second average 10 second average or long term average Record the building pressure and fan flow readings at the various target building pressures used in your test procedure 3 7 b Entering Baseline Readings into TECTITE Software When Using the Baseline Feature When using the Baseline feature and the TECTITE program to analyze your test data be sure to enter 0 into the Pre and Post Test Baseline fields in the Manual Data Entry Table This is because the Baseline feature automatically subtracts the measured baseline pressure from the building test pressure readings Note Pressing the C
10. Channel B Display Pressure AH Flow Specialized mode for Normal system operating Total air handler flow in units chosen PR AH measuring air handler pressure NSOP and test flow CFM m h 1 s Air flow from the flow rates using a system operating pressure selected Energy Conservatory test TrueFlow Air TFSOP in Pascals device is continuously adjusted using Handler Flow Meter the measured NSOP and TFSOP or a Duct Blaster fan readings from Channel A Note Appendix A contains a Quick Guide for using the DG 700 with the Pressure Air Handler Flow feature 5 2 Overview of Pressure Air Handler Flow Mode The Pressure Air Handler Flow mode is a specialized mode used to measure air handler flow with a TrueFlow Air Handler Flow Meter or a Duct Blaster fan The PR AH mode consists of the following 2 step procedure Step 1 When first entering the PR AH mode Channel A is set up to measure a Normal System Operating Pressure NSOP in the duct system under normal operating conditions e g existing filter in place no test device installed Pressing the START button initiates a long term average NSOP pressure measurement and pressing ENTER records and enters the NSOP reading into the gauge Step 2 Once the NSOP measurement is made and entered into the gauge Step 1 the gauge is set up to simultaneously measure the Test Flow System Operating Pressure TFSOP on Channel A and to display the estimated air handler flow rate on Channel
11. Jack The AC power input jack can be used with an optional AC power supply to provide a long term power source for the gauge to be used when data logging The gauge is normally powered by 6 AA batteries located in the rear battery compartment When the AC power supply is plugged in the power supply bypasses the batteries in the battery compartment See Chapter 7 for AC power supply specifications Note Always turn off the gauge before plugging in the AC power supply USB Serial Fan Control AC Power Input Jack Communication Communication Output Jack Port Port Communication Jacks Blower Door and Duct Blaster Speed Controllers Operating Instructions for the DG700 Chapter 1 Feature Summar 1 5 Overview of the Time Averaging Feature When the gauge is turned on the default time averaging period is Z second average To change the selected time averaging period press the TIME AVG button The currently selected time averaging period is shown in the TIME AVG portion of the gauge display The DG 700 has a choice of 4 time averaging periods which are applied to both measurement channels A 0 1 5 a Description of Time Averaging Periods I Second Average 1 Both measurement channels are updated once per second with the average of the readings from the previous 1 second The J Second Average is the default time averaging period when turning on the gauge and is the period most commonly used 5 Seco
12. NSOP measurement is made and entered into the gauge Step 1 the gauge is set up to simultaneously measure the Test Flow System Operating Pressure TFSOP on Channel A and to display the estimated air handler flow rate on Channel B Install the test device used to measure air handler flow either a TrueFlow Metering Plate or a Duct Blaster Fan Connect the test device to Channel B Refer to the TrueFlow or Duct Blaster operation manuals for installation instructions Select the installed test device and device configuration on the DG 700 using the DEVICE and CONFIG buttons If Using a TrueFlow Metering Plate Turn on the air handler Channel A will now display the TFSOP reading from the static pressure probe and Channel B will display adjusted air handler flow The flow rate estimate shown on Channel B is determined by continuously adjusting the measured air flow from the TrueFlow Metering Plate using a flow resistance correction factor calculated from the NSOP and TFSOP pressure readings If the readings are fluctuating change the time averaging setting to 5 second 10 second or long term average using the TIME AVG button 2L Operating Instructions for the DG700 Chapter 5 _ Pressure Air Handler Flow Mode If Using a Duct Blaster Fan Pressure Matching Method Turn on the air handler Now turn on and adjust the Duct Blaster fan along with the air handler fan so that the TFSOP reading on Channel A is close within 5
13. Pressure 12 5 10 2 Pressure 12 5 10 2 6 15 8 12 2 6 Signal Signal PL Display 12 5 10 2 Display 7 7777 9 10 Second Average Long Term Average Seconds 1 2 3 4 5 Seconds 1 2 3 4 5 6 7 8 9 10 Pressure 112 5 10 2 6 Pressure 12 5 10 2 6 15 8 12 2 6 Signal oe Signal Display l Display 12 9 97 7 8 8 9 8 8 Q 1 5 c Resetting the Time Averaging Measurement Buffer restart the time averaging measurement buffer when an unwanted signal has been recorded during a time averaging period e g someone steps on the tubing during a Long Term Average measurement To reset and restart the time averaging measurement buffer for both channels press the START button When using the 5 second 10 second or Long Term averages it is sometimes desirable to reset and START Operating Instructions for the DG700 Chapter 1__ Feature Summary 1 6 Overview of the Baseline Pressure Measurement Feature Channel A The Baseline feature on Channel A allows the user to measure and record a baseline pressure reading and then display the baseline adjusted pressure on the gauge For purposes of this manual a baseline pressure reading is defined as a pressure measurement made under a specific operating condition which will be used to determine the change in pressure created by a change in the operating condition A common building performance application requiring use of a baseline pressure reading is determining the exten
14. Reference tap and run it outside while leaving the Channel A Input tap open to the house The gauge will now display the pressure difference between the house and outside along with the correct sign of the reading If the house is at a lower pressure than outside e g from an exhaust fan running then the pressure reading displayed on the gauge will have a minus sign in front of the reading On the other hand if you are standing outside and wish to make the same reading connect a piece of tubing to the Channel A Input tap and run it into the house while leaving the Channel A Reference tap open to the outside The gauge will now display the same house to outside pressure difference as above along with the correct sign Note In either case if you had connected the tubing to the wrong tap on Channel A the display would show the correct differential pressure reading however the reading would have the wrong sign 2 3 Changing the Pressure Units inches w c The default pressure units for the gauge is Pascals for both Channels A and B To change the pressure units for both channels press the UNITS button The selected pressure units are shown on the gauge display directly below each of the channel readings unis When in the PR PR operating mode the DG 700 can display pressure readings in units of Pascals or UNITS Operating Instructions for the DG700 Chapter2 Pressure Pressure Mode 2 4 Changing the Time Averaging Peri
15. adjusting and re adjusting the fan speed control to achieve a test pressure of exactly 50 or 25 Pascals just get close to the target pressure and make your measurement As long as the test pressure displayed on Channel A is within 5 Pascals of the 50 or 25 Pascal target pressure any errors introduced by estimating the leakage on Channel B will typically be very small less than 1 see Tables 4 1 and 4 2 below for more information The leakage estimate displayed on Channel B will typically be very stable because of the continuous adjustments made using the Channel A test pressure Ifyou can not achieve the target test pressure of 50 or 25 Pascals because the building or duct system is extremely leaky a leakage estimate at the target pressure will automatically be displayed on Channel B When in the 50 or 25 modes leakage estimates can be displayed as a leakage rate e g CFM m hr l s or as a leakage area e g square inches or square centimeters to visualize the physical size of the measured air leaks 4 3 Changing the Selected Test Device and Configuration When in the Pressure Flow 50 or 25 modes the following Energy Conservatory test DEVICE CONFIG devices can be selected Model 3 110V Minneapolis Blower Door fans BD 3 Model 3 220V Minneapolis Blower Door fans BD 3 220 Model 4 220V Minneapolis Blower Door fans BD 4 Series A Minneapolis Duct Blaster fans DB A Series
16. and the gauge begins recording a long term average NSOP pressure reading on Channel A During the measurement procedure the Channel B display is used as a timer to let the user know how long in seconds the NSOP measurement has been active The longer the measurement time generally the more stable the reading typically becomes In the screen to the right the measured NSOP pressure is 56 7 Pascals measured over the past 30 seconds f Once you are satisfied with the NSOP reading press the ENTER key to accept and enter the reading into the gauge Turn off the air handler fan and leave the static pressure probe in place and connected to the gauge on Channel A 2 Install the TrueFlow Metering Plate in an Existing Filter Slot a Remove the existing filter and set it aside b Choose and assemble the metering plate and spacers needed to match the filter slot size Filter Slot Flow Metering Plate Spacer Dimension in X in in X in Spacer 1 Spacer 2 a0 Operating Instructions for the DG700 Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices c Install the assembled metering plate into the filter slot Be sure the front side of the metering plate is facing into the air flow front side has two diamond shaped labels on it The H channel gasket should provide a seal around the metering plate all of the air flow should pass through the metering plate and not around it Be sure that the ends o
17. baseline pressure the baseline measurement procedure can be restarted by pressing the START button When START is pressed the measurement buffer and time counter for the baseline reading is cleared and a new baseline reading is immediately started stant During a baseline measurement procedure i e while the gauge is recording the long term average START Channel A reading a new baseline measurement procedure can be initiated by pressing the Fj Once a baseline measurement has been taken and entered into the gauge 1 e ADJ appears below the BASELINE button 0 1 6 c Clearing and Exiting from the Baseline Pressure Procedure Pressing the CLEAR button clears the baseline measurement buffer and turns the baseline feature off CLEAR The gauge will remain in the operating mode selected prior to the BASELINE button being pressed Note If the gauge Mode is changed while the baseline measurement feature is active the baseline measurement buffer is cleared and the baseline feature is turned off 1 7 Auto Off Feature In order to preserve battery life the DG 700 gauge will automatically shut off if no keys are pressed for 2 hours The auto off feature can be disabled by simultaneously pressing the CLEAR and ENTER buttons The auto off feature is automatically re enabled whenever the gauge is turned off and then back on Operating Instructions for the DG700 Chapter 2__Pressure Pressure Mode Chapter 2 Pressure Pressure Mode 2 1 Mode Summ
18. be plugged into an open serial communication port on your computer USB Serial Fan Control Communication Communication Output Jack Port Port Operating Instructions for the DG700 Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices To check if the USB communication drivers have been properly installed on your computer or to see if your computer has an available serial communication port for a 9 pin serial cable you will need to access the Device Manager in your Windows operating system To access the Device Manager in Windows XP or 2000 click on Start then right click on the My Computer shortcut and select Properties This will cause the System Properties window to appear To open the Device Manager click on Hardware and then Device Manager To access the Device Manager in Windows Vista click on Start then right click on the Computer shortcut and select Properties This will cause the System window to appear To open the Device Manager click on Device Manager From the Device Manager window open the Ports icon to show which communication ports are currently installed on your computer In the case illustrated below the computer has 3 installed communication ports which can be used to interface with a TEC digital gauge LE alolx File Action View Help ine iy Computer E a Disk drives H 3 Display adapters cee 2 DVD CD ROM drives H a Floppy disk controllers HA Floppy disk dri
19. flashing and the gauge begins recording a long term average baseline pressure reading on Channel A During the baseline measurement procedure the Channel B display is used as a timer to let the user know how long in seconds the baseline measurement has been active The longer the measurement time generally the more stable the baseline reading typically becomes ca Pressing the BASELINE button initiates the baseline Operating Instructions for the DG700 Chapter 1 Feature Summar Once you are satisfied with the baseline pressure reading press the ENTER key to accept and enter the baseline pressure reading into the gauge After pressing ENTER Channel A will now display the baseline adjusted pressure reading i e the measured baseline pressure reading will be subtracted from the current Channel A pressure measurement The icon ADJ appears in the Channel A display to indicate that the baseline adjusted pressure reading is displayed The time averaging period for the gauge reverts back to whatever period was selected prior to pressing the BASELINE button In addition Channel B also reverts back to displaying an unadjusted pressure reading es S g IRE ADJ Fa Now create a change in the operating condition of the building e g turn on and exhaust fan Channel A will display the change in building pressure caused by the change in operating condition EPR 0 1 6 b Restarting the Baseline Measurement
20. introduced if the leakage estimate was determined at an actual test pressure of 30 Pa Channel A and the actual exponent of the leaks was 0 60 rather than the assumed value of 0 65 kg Operating Instructions for the DG700 Chapter 4 Pressure Flow 50 and 25 Modes Table 4 1 Error in Leakage Estimate for 50 Mode Actual exponent n 0 5 0 55 0 6 0 65 0 7 0 75 Test 10 21 4 149 7 7 0 0 8 4 17 5 Pressure in Pa 15 16 5 11 38 58 0 0 6 2 12 8 Channel A 20 12 8 88 45 0 0 4 7 9 6 25 9 9 6 7 3 4 0 0 3 5 7 2 30 7 4 9 0 2 9 0 0 2 60 5 2 35 5 2 3 5 1 8 0 0 1 8 3 6 40 3 3 2 2 1 1 0 0 1 1 2 3 45 1 6 1 0 0 5 0 0 0 5 1 1 50 0 0 0 0 0 0 0 0 0 0 0 0 55 1 4 1 0 0 5 0 0 0 5 0 9 60 2 8 1 8 0 9 0 0 0 9 1 8 65 4 0 2 7 1 3 0 0 1 3 2 6 Table 4 2 Error in Leakage Estimate for 25 Mode Actual exponent n 0 5 0 55 0 6 0 65 0 7 0 75 Test 5 14 9 7 7 0 0 8 4 17 5 27 3 Pressure in Pa 10 8 8 4 5 0 0 4 7 9 6 14 7 Channel A 15 5 0 2 5 0 0 2 6 5 2 8 0 20 2 2 1 1 0 0 1 1 2 3 3 4 25 0 00 0 0 0 0 0 0 0 0 0 0 30 1 8 0 9 0 0 0 9 1 8 2 1 35 3 4 1 7 0 0 1 7 3 3 4 9 40 4 8 2 4 0 0 2 3 4 6 6 8 Operating Instructions for the DG700 Chapter5 Pressure Air Handler Flow Mode Chapter 5 Pressure Air Handler Flow Mode 5 1 Mode Summary Mode Application Channel A Display
21. is displayed on Channel A You may re start Cruise again by pressing Start Fan or exit the Cruise feature altogether by pressing the CLEAR button The fan will also be stopped while Cruising under the following circumstances If Channel A registers a pressure of 100 Pa or more the fan will automatically be shut down and the gauge will revert back to the Cruise setup state Pressing the HOLD button will shut down the fan and freeze the display Pressing Start Fan from a display freeze will re start Cruise Pressing the HOLD button a second time from a display freeze will return the gauge to the Cruise setup state The DG 700 s auto off feature will shut down the gauge and turn off the fan after 2 hours of run time if no buttons are pressed during that time Cruising Zero 0 and 0 Cruising Zero is designed for specialized testing and research applications Cruising Zero is useful if you want to control the Blower Door fan to remove an existing pressure from a building duct system or other enclosure When using the fan to pressurize a space that is currently depressurized use 0 as your Cruise target pressure When using the fan to depressurize a space that is currently pressurized use 0 as the Cruise target pressure Refer to specific test procedures for more information on using Cruise Zero ey Operating Instructions for the DG700
22. needs to know the building or duct system pressure with reference to outside prior to the test fan being turned on This initial baseline pressure reading can be quickly measured and then used to adjust the test pressure readings to determine the actual change in pressure caused by operation of the Blower Door or duct airtightness test fan See Sections 1 6 2 5 and 3 7 for a description and examples on how to use the Baseline feature 4 8 Leakage Estimate Calculations Used in the 50 and 25 Modes LY 4 8 a 50 Mode The following equation is used to estimate leakage rates when in the 50 mode 50 0 65 Displayed Leakage Rate Measured Blower _ Channel B _ Door Air Flow Rate Current Test Pressure Pa Channel A The following equation is used to estimate leakage area when in the 50 mode square inches Displayed Leakage Area Estimated Leakage Channel B Rate 7 495 CFM50 16 Operating Instructions for the DG700 Chapter 4 _Pressure Flow 50 and 25 Modes The following equation is used to estimate leakage area when in the 50 mode square centimeters Displayed Leakage Area Estimated Leakage Channel B Rate 1 1617 CFMS50 Note Leakage areas calculated by the DG 700 are Equivalent Orifice Leakage Areas EOLA which are defined as the area of a sharp edged hole that would leak at the same flow rate as the estimated leakage rate when the hole is subjected to the target test pressure e
23. no liability in connection with any goods which are incorporated into other products or equipment by the Purchaser d All products returned under warranty shall be at the Purchaser s risk of loss The Purchaser is responsible for all shipping charges to return the product to The Energy Conservatory The Energy Conservatory will be responsible for return standard ground shipping charges The Customer may request and pay for the added cost of expedited return shipping The foregoing warranty is in lieu of all other warranties and is subject to the conditions and limitations stated herein NO OTHER EXPRESS OR IMPLIED WARRANTY IS PROVIDED AND THE SELLER DISCLAIMS ANY IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR MERCHANTABILITY THE EXCLUSIVE REMEDY OF THE PURCHASER FOR ANY BREACH OF WARRANTY shall be the return of the product to the factory or designated location for repair or replacement or at the option of The Energy Conservatory refund of the purchase price The Energy Conservatory s maximum liability for any and all losses injuries or damages regardless of whether such claims are based on contract negligence strict liability or other tort shall be the purchase price paid for the products INNO EVENT SHALL THE SELLER BE LIABLE FOR ANY SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES The Energy Conservatory shall not be responsible for installation dismantling reassembly or reinstallation costs or charges No action regardless of f
24. pressure of 25 Pascals The leakage estimate shown on Channel B is determined by mathematically adjusting the actual air flow from the Duct Blaster fan using the Channel A duct system pressure reading and a Can t Reach Pressure factor 28 Operating Instructions for the DG700 Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices c Check and adjust if necessary the selected test Device i e fan and Configuration i e Flow Ring shown in the upper part of the gauge display to match the fan and Flow Ring being used in the test For example the Device icon for the Series B Duct Blaster fan is DB B and the Configuration icon for Ring 2 is B2 Press the DEVICE button to change the selected fan Press the CONFIG button to change the selected Flow Ring d Turn on the Duct Blaster fan If Using Cruise Control Turn the Duct Blaster speed controller to the just on position i e turn the controller knob all the way down counter clockwise and flip the on off switch to ON the fan will not be turning Now press the Begin Cruise Enter button The Channel A display will now show the number 25 your target Cruise pressure Press the Start Fan Start button The Duct Blaster fan will now slowly increase speed until the duct pressurization displayed on Channel A is approximately 25 Pascals If Manually Controlling Fan Turn on the Duct Blaster fan controller and slowly turn the fan controlle
25. supply Universal Specifications for Power Supply 100 240V 50 60Hz Input 12VDC Output Center 12mm Barrel Length 3 W Min Output International mains adapters included 25 Operating Instructions for the DG700 Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices A 1 One Point 50 Pascal Building Depressurization Test using the Model 3 Minneapolis Blower Door and DG 700 Digital Gauge 1 Install the Blower Door system a Install the aluminum frame and nylon panel in an exterior doorway of a large open room b Attach the gauge mounting board and fan speed controller to a door or to the aluminum frame gauge hanger bar using the C clamp on the back of the mounting board da ne c Secure the DG 700 gauge onto the mounting board using the Velcro strips and po connect tubing to the DG 700 as shown in the woe raa aa illustration to the right n EPEN DG 700 Pressure amp Flow Gauge d Run approximately 3 5 feet of the tubing to the remaining end of the Green tubing outside oon Ss Channel B Input through one of the patches in the bottom Leave tap open p gt agga e ae corners of the nylon panel Be sure the should be outside end of the tubing is well away from connected to the the exhaust flow of the Blower Door fan and Connect the Green tubing to El i i Bloyyei Door fan the Chann
26. the filter grille door open for the remainder of the test Connect the Metering Plate to the DG 700 a Connect the tubing from the installed metering plate to the DG 700 Connect the Red total pressure grid tubing connection to the Channel B Input pressure tap Connect the Green static pressure grid tubing connection to the Channel B Reference pressure tap The Channel A Input tap should remain connected to the static pressure probe Measure the TrueFlow System Operating Pressure TFSOP and Adjusted Total Air Handler Flow a Check and adjust if necessary the selected test Device and Configuration shown in the upper part of the gauge display to match the metering plate installed in Step 2 above When using the TrueFlow Metering Plates the Device icon should always be set to TF and the Configuration icon should be set to 14 or 20 depending on which metering plate is installed Changes to the selected Device and Configuration are made by pressing the DEVICE and CONFIG buttons b Turn the air handler fan back on to the same speed as used in Step 1 above Channel A will now display the TFSOP reading from the static pressure probe and Channel B will display adjusted air handler flow The static pressure probe should be in exactly the same position as it was in Step 1 above The air handler flow rate estimate shown on Channel B is determined by continuously adjusting the measured air flow from the TrueFlow Metering Plate using a flow resista
27. to accurately determine the change in pressure from the test fan the user first needs to know the building or duct system pressure with reference to outside prior to the test fan being turned on This initial baseline pressure reading can be quickly measured and then used to adjust the test pressure readings to determine the actual change in pressure caused by operation of the Blower Door or duct airtightness test fan See Section 1 6 for an overview of the baseline pressure feature 0 3 7 a Example Using the Baseline Feature During a Blower Door Depressurization Test Set up Channel A to measure building pressure with reference to outside e g run tubing from the Channel A Reference tap to outside and leave the Channel A Input tap open to the building assumes the gauge is in the building Run tubing from the Channel B Input tap to the pressure tap on the Blower Door fan With the Blower Door off and the No Flow Plate installed turn on the gauge and put it the PR FL mode by pressing the MODE button Select the Blower Door fan device you will be using by pressing the DEVICE button Model 3 fan is the default test device when entering the PR FL mode 12 Operating Instructions for the DG700 Chapter 3 Pressure Flow Mode Press the BASELINE button The word BASELINE will begin to flash in the Channel A display indicating that the baseline feature has been initiated At this point the gauge is monitoring the real ti
28. transition piece and connect trim Connect the open end of the flex duct to the square transition piece using the velcro strap on the flex duct Fan Configuration ea ae se d Connect the fan speed controller to the fan and plug it into a OF DEES D PUC steer grounded power outlet Open no Flow Ring 1 500 600 e Install the Flow Ring which you think best matches the Ring 1 800 225 Ring 2 300 90 needed fan flow Ring 3 125 10 f If your DG 700 gauge and fan speed controller are compatible with Cruise Control install the fan control cable into the 3 5 mm communication jacks located on top of the DG 700 and on the side of the speed controller otherwise skip this step 2 Prepare the duct system and house for the Test a Adjust the HVAC system controls so that the air handler does not turn on during the Test b Temporarily seal off all remaining supply and return registers and combustion or ventilation air inlets which are connected to the duct system Use Duct Mask temporary register sealing material provided with your Duct Blaster or use painters tape and paper c Turn off any exhaust fans vented dryers and room air conditioners d Remove all central filters i e in air handler or return plenum e Open a door or window between the house and outside to prevent changes in house pressure when the Duct Blaster is running f If the Duct Blaster is installed in an attic garage or crawlspace open vents or acc
29. 0 Mode Q 4 2 6 Pressure Flow 25 Mode Q 4 2 c Benefits of Using the 50 and 25 Modes 4 3 Changing the Selected Test Device and Configuration 4 4 or LO Displayed on Channel B 4 5 Changing the Leakage Units 4 6 Changing the Time Averaging Period 4 7 Using the Baseline Pressure Feature in Pressure Flow Mode 4 8 Leakage Estimate Calculations Used in the 50 and 25 Modes Q 4 8 a 50 Mode Q 4 8 6 25 Mode Q 4 8 c Errors in Leakage Estimates CHAPTER5 PRESSURE AIR HANDLER FLOW MODE 5 1 Mode Summary 5 2 Overview of Pressure Air Handler Flow Mode 5 3 Changing the Selected Test Device and Configuration 5 4 or LO Displayed on Channel B 5 5 Changing the Air Handler Flow Units 5 6 Changing the Time Averaging Period for the Step 2 Procedure 5 7 Test Procedure For Measuring Air Handler Flow UO 5 7 a Step 1 Measuring the NSOP 0 5 7 6 Step 2 Measuring the TFSOP and Adjusted Air Handler Flow 5 8 Flow Resistance Correction Factors Used in the DG 700 CHAPTER6 PRESSURE VELOCITY MODE 6 1 Mode Summary 6 2 Overview of Pressure Velocity Mode 6 3 Changing the Air Velocity Units 6 4 Changing the Time Averaging Period 6 5 Air Velocity Calculations Used in the DG 700 CHAPTER7 SERVICING AND MAINTENANCE 7 1 Gauge Calibration and Servicing Q 7 1 a Calibration Q 7 1 6 Servicing Repairs 7 2 Low Battery Indicator Battery Replacement Q 7 2 a Low Battery Indicators Q 7 2 6 Battery Replacement
30. 10V and 220V Model 4 Minneapolis Blower Door fans 220V Series A and B Minneapolis Duct Blaster fans Exhaust Fan Flow Meter TrueFlow Air Handler Flow Meter The DG 700 will calculate and display air velocity readings on Channel B from a standard pitot tube choice of units feet per minute FPM meters per second m s O 1 1 e Display HOLD When the HOLD button is pushed the DG 700 display is temporarily frozen with the most recent readings and settings The Hold feature is turned off by pushing the HOLD button a second time Operating Instructions for the DG700 Chapter 1__ Feature Summary OW 1 1 f Specialized 50 and 25 Leakage Measurement Mode For one point airtightness tests of building and duct systems the DG 700 will display on Channel B estimated leakage rates adjusted to either 50 Pascals or 25 Pascals of test pressure Choice of leakage units CFM m hr I s sq inches sq centimeters 0 1 1 g Specialized Air Handler Flow Measurement Mode Designed for measuring air handler flow rates using a TrueFlow Air Handler Flow Meter or a Duct Blaster fan Automatically adjusts displayed air flow rate using measured system operating pressures NSOP and TFSOP Choice of air flow units cfm m hr 1 s 0 1 1 h Automated Blower Door Testing Cruise Control and Data Logging The DG 700 can be used along with a computer and specialized TEC software TEC
31. LEAR button clears the baseline measurement buffer and turns the baseline feature off If the gauge Mode is changed while the baseline measurement feature is active the baseline measurement buffer is cleared and the baseline feature is turned off Lo Operating Instructions for the DG700 Chapter 4 _Pressure Flow 50 and 25 Modes Chapter 4 Pressure Flow 50 and 25 Modes 4 1 Mode Summary Mode Application Channel A Display Channel B Display Pressure Flow 50 Pa Specialized mode for Building pressure in Pascals Building leakage at 50 Pascals in units PR FL 50 one point Blower chosen CFM 50 m h 50 1 s 50 Door building in 50 cm 50 airtightness test Pressure Flow 25 Pa Specialized mode for Duct system pressure in Pascals Total duct leakage at 25 Pa in units PR FL 25 one point total chosen CFM 25 m7 h 25 1 s 25 leakage duct in 25 cm 25 airtightness test Note Appendix A contains Quick Guides for using the DG 700 to conduct one point building and duct system airtightness tests using the 50 and 25 features 4 2 Overview of Pressure Flow 50 and 25 Modes a 4 2 a Pressure Flow 50 Mode The Pressure Flow 50 mode is used to conduct a one point Blower Door building airtightness test In this mode Channel A is used to measure building pressure while Channel B is used to display estimated building leakage at a test pressure of 50 Pascals The leakage estimate shown on Channel B is determine
32. Operating Instructions for the DG 700 Pressure and Flow Gauge DG 700 Pressure amp Flow Gauge k DEVICE CONE Performance Testing Tools 612 827 1117 STEC The Energy Conservatory Operating Instructions for the DG 700 Pressure and Flow Gauge The Energy Conservatory 2801 21 Ave S Suite 160 Minneapolis MN 55407 Ph 612 827 1117 Fax 612 827 1051 www energyconservatory com Manual Edition May 2012 2012 The Energy Conservatory All rights reserved ENERGY CONSERVATORY WARRANTY EXPRESS LIMITED WARRANTY Seller warrants that this product under normal use and service as described in the operator s manual shall be free from defects in workmanship and material for a period of 24 months or such shorter length of time as may be specified in the operator s manual from the date of shipment to the Customer LIMITATION OF WARRANTY AND LIABILITY This limited warranty set forth above is subject to the following exclusions a With respect to any repair services rendered Seller warrants that the parts repaired or replaced will be free from defects in workmanship and material under normal use for a period of 90 days from the date of shipment to the Purchaser b Seller does not provide any warranty on finished goods manufactured by others Only the original manufacturer s warranty applies c Unless specifically authorized in a separate writing Seller makes no warranty with respect to and shall have
33. Pa to the NSOP reading entered into the gauge in Step 1 There is no need to exactly match the NSOP and TFSOP pressures because the gauge is making an adjustment to the measured Duct Blaster fan flow using a flow resistance correction factor calculated from the NSOP and TFSOP pressure readings If the readings are fluctuating change the time averaging setting to 5 second 10 second or long term average using the TIME AVG button Note If you are unable to get the TFSOP to within 5 Pascals of the NSOP reading the gauge will continue to display an adjusted air handler flow rate using the calculated flow resistance correction factor The greater the difference between the NSOP and TFSOP readings the higher the probability that the flow resistance correction factor will introduce errors into the flow estimate 5 8 Flow Resistance Correction Factors Used in the DG 700 The following equation is used to calculate the flow resistance correction factor used by the DG 700 in the PR AH mode NSOP 0 50 Flow Resistance Correction Factor TFSOP 22 Operating Instructions for the DG700 Chapter6 _ Pressure Velocity Mode Chapter 6 Pressure Velocity Mode 6 1 Mode Summary Mode Application Channel A Display Channel B Display Pressure Velocity Multi purpose pressure Pressure in Pascals Air velocity in units chosen PR V and air velocity FPM m s measurements 6 2 Overview of Pressure Velocity Mode The Pressure Velocity mode is
34. TITE TECTITE Express or TECLOG2 to conduct fully automated Blower Door tests The Cruise Control feature allows you to automatically control a Blower Door or Duct Blaster fan to maintain a constant 75Pa 50 Pa 25 Pa or 0 Pa building pressure without having the gauge connected to a computer Both of the DG 700 s pressure channel readings can be recorded using TEC s TECLOG2 data logging software 1 2 Overview of Gauge Operating Modes Mode Pressure Pressure PR PR Pressure Flow PR FL Pressure Flow 50 Pa PR FL 50 Pressure Flow 25 Pa PR FL 25 Pressure AH Flow PR AH Pressure Velocity PR V Application Multi purpose pressure measurements Multi purpose pressure and air flow measurements Specialized mode for one point Blower Door building airtightness test Specialized mode for one point total leakage duct airtightness test Specialized mode for measuring air handler flow rates using a TrueFlow Air Handler Flow Meter or a Duct Blaster fan Pressure and air velocity measurements Channel A Display Pressure in units chosen Pa in W c Pressure in Pascals Building pressure in Pascals Duct system pressure in Pascals Normal system operating pressure NSOP and test flow system operating pressure TFSOP in Pascals Pressure in Pascals Channel B Displa Pressure in units chosen Pa in W c Nominal unadjusted air flow from the selecte
35. Y REF CONSERVATORY REF Channel A Reference Tap gt e e j Channel B Reference Tap Button Purpose Button Purpose DEVICE Used to select the Energy Conservatory test device BASELINE Initiates Baseline pressure measurement procedure connected to Channel B not active in PR PR on Channel A not active in PR AH mode mode UNITS Selects the pressure and air flow units for Channels START Used to start measurement procedure for Baseline A and B and NSOP measurements Also used to reset time averaging buffers and manually initiate auto zero CONFIG Used to select the configuration for the currently ENTER Used to accept and enter Baseline and NSOP chosen test device not active in PR PR mode pressure readings After entering Baseline reading Channel A will display baseline adjusted pressure MODE Selects the current operating mode ON OFF Turns gauge On and Off CLEAR Used to exit out of a Baseline pressure LIGHT Turns display backlight On and Off measurement procedure When in PR AH mode resets gauge back to beginning of AH flow measurement procedure i e NSOP measurement Also used to turn off the Cruise Control feature TIME AVG Used to select the time averaging mode not active HOLD Turns display Hold feature On and Off during Baseline and NSOP measurements Begin Cruise Initiates Cruise Control feature not active in Stop Fan Turns off the fan for Cruise Control PR AH and PR V modes Start Fan Starts the fan for Cruise Control Cr
36. a multi purpose mode used to measure a pressure signal on Channel A and or measure an air velocity reading from a pitot tube connected to Channel B To select the Pressure Velocity mode press the MODE button until the selected operating mode shown on the gauge display is PR V When first entering this mode the default air velocity unit on Channel B is feet per minute FPM Channel A always displays pressure readings in Pascals when in the PR V mode 6 3 Changing the Air Velocity Units units of feet per minute or meters per second To change the air velocity units for Channel B press unis When in the PR V operating mode the DG 700 can display air velocity readings on Channel B in UNITS the UNITS button The selected units are shown on the Channel B display directly below the channel reading 6 4 Changing the Time Averaging Period The selected time averaging period is shown in the TIME AVG portion of the gauge display See To change the selected time averaging period for both Channel A and B press the TIME AVG button AVG e A A Section 1 5 above for a complete description of the time averaging periods 6 5 Air Velocity Calculations Used in the DG 700 The following equations are used to calculate air velocity from a pitot tube connected to Channel B Note The pitot tube should be set up to measure velocity pressure in order for the DG 700 to correctly display air velocity readings l Velocity ag Velo
37. ary Mode Application Channel A Display Channel B Display Pressure Pressure Multi purpose Pressure in units chosen Pressure in units chosen PR PR pressure Pa in W c Pa in W c measurements 2 2 Overview of Pressure Pressure Mode The DG 700 gauge is turned on by pressing the ON OFF button once When first turned on the gauge is automatically placed in the Pressure Pressure PR PR operating mode and immediately begins monitoring and displaying pressure readings for both Channels A and B The default pressure units for both channels is Pascals and the default time averaging period is J second average Each channel on the DG 700 measures the pressure difference between either of the top Input pressure taps and its corresponding bottom Reference pressure tap The gauge can monitor and display both positive and negative pressure readings i e bi directional In order to display the correct sign of the pressure reading i e positive or negative it is important that the pressure taps are used consistently and logically The top Input taps should always be connected to the pressure signal s you are trying to measure The bottom Reference taps should always be connected to the reference pressure s you are measuring the pressure signal with reference to For example let s set up the gauge to measure the pressure in a house with reference to outside using Channel A If you are standing in the house connect tubing to the Channel A
38. city en Air Velocity 10962 Pressure in wc Air Velocity Pressure Pa feet minute i meters second 1 4142 0 075 lb ft 1 204 Kg m Zo Operating Instructions for the DG700 Chapter 7 Servicing and Maintenance Chapter 7 Servicing and Maintenance 7 1 Gauge Calibration and Servicing a 7 1 a Calibration The DG 700 is calibrated at our factory prior to being shipped A sticker on the back of the gauge case will indicate the date of calibration as well as the next recommended recalibration date Under normal operation we recommend that the gauge be recalibrated once every two years Gauge recalibration is a service provided by The Energy Conservatory for a small fee 80 as of 7 1 13 Gauges needing recalibration should be sent to The Energy Conservatory 2801 21st Ave S Suite 160 Minneapolis MN 55407 Attn Digital Gauge Recalibration When returning a gauge for calibration please print out the Equipment Return Form from our website www energyconservatory com sites default files documents equipment_return_form pdf fill it out completely and include a copy of the completed form along with the equipment being returned Q 7 1 b Servicing Repairs All factory authorized repairs for the DG 700 gauge are conducted at the above address To have your gauge repaired send the gauge to the above address along with a completed copy of our Equipment Return Form see above 7 2 Low Battery Indicator Battery Rep
39. d Energy Conservatory test device in units chosen CFM m h I s Building leakage at 50 Pascals in units chosen CFM 50 m h 50 1 s 50 in 50 cm 50 Leakage rate is determined by continuously adjusting the measured air flow from the selected Blower Door fan to a building pressure of 50 Pascals using the real time Channel A building pressure reading Total duct leakage at 25 Pa in units chosen CFM 25 m h 25 1 s 25 in 25 cm 25 Leakage rate is determined by continuously adjusting the measured air flow from the selected duct testing fan to a duct pressure of 25 Pascals using the real time Channel A duct pressure reading Total air handler flow in units chosen CFM m h I s Air flow from the selected Energy Conservatory test device is continuously adjusted using the measured NSOP and TFSOP readings from Channel A Air velocity in units chosen FPM m s Operating Instructions for the DG700 Chapter 1 Feature Summar 1 3 Gauge Face and Buttons Selected test device Selected test device for air i configuration for air flow flow measurements on Channel B DG 700 Pressure amp Flow Gauge measurements on Channel B Channel A Reading Channel B Reading Selected Operating Mode Selected Time Averaging for both Channels Display Hold Indicator CLEAR I Time Low Battery Indicator pe AVG Channel A Input Tap gt FS Chanel B Taput Tap Fan Cruise INPUT ON A row The ENERG
40. d by mathematically adjusting the measured air flow from the selected Blower Door fan using the real time Channel A building pressure reading and a Can t Reach Pressure factor see Section 4 8 below CFM 50 a 4 2 b Pressure Flow 25 Mode The Pressure Flow 25 mode is a specialized mode used for conducting a one point total leakage duct airtightness test In this mode Channel A is used to measure duct system pressure while Channel B is used to display estimated total duct leakage at a test pressure of 25 Pascals The leakage estimate shown on Channel B is determined by mathematically adjusting the measured air flow from the selected Duct Blaster fan using the real time Channel A duct system pressure reading and a Can t Reach Pressure factor see Section 4 8 below mode shown on the gauge display is PR FL 50 or PR FL 25 When first entering either of these two modes the default pressure units on Channel A is Pascals the default leakage units on Channel B is CFM 50 or 25 and the default time averaging period is I second average mone To select the Pressure Flow 50 or 25 modes press the MODE button until the selected operating Operating Instructions for the DG700 Chapter 4 _Pressure Flow 50 and 25 Modes Q 4 2 c Benefits of Using the 50 and 25 Modes The 50 and 25 modes provide four distinct benefits for one point building and duct airtightness testing The operator no longer needs to waste time
41. e fan speed until the building depressurization shown on Channel A is between 45 and 55 Pascals Do not waste time adjusting and re adjusting the fan speed control to achieve a test pressure of exactly 50 Pascals g Channel B will now display the One Point 50 Pascal leakage estimate Record this number If the leakage estimate is fluctuating more than desired try changing the Time Averaging setting on the gauge by pressing the TIME AVG button and choosing the 5 or 10 second or Long term averaging period If or LO appear on Channel B see 4 below h Turn off the Blower Door fan If you are using Cruise Control this is done by pressing the Stop Fan Clear button or LO appearing on Channel B Whenever or LO appears on Channel B in the PR FL 50 Mode the DG 700 can not calculate a reliable leakage estimate The messages and LO appear on Channel B under the following three conditions a is continuously displayed when the building test pressure from Channel A is below a minimum value of 10 Pascals Estimating building leakage results when the test pressure is below this value may result in large errors If possible install a larger Flow Ring or remove the Flow Rings to generate more fan flow b LO is continuously displayed when there is negligible air flow through the test device c LO alternates with a flow reading when the air flow read
42. e tap should be connected to the inside of the building or it can be connected to an unconditioned zone containing the air handler provided that the zone remains at the same pressure as the building during the test Turn on the gauge and put it the PR AH mode by pressing the MODE button The icon NSOP will begin to flash in the Channel A display indicating that the PR AH measurement feature has been initiated At this point the gauge is monitoring the real time Channel A NSOP pressure but is not recording the reading The Channel B display is not active at this time Press the START button to begin the NSOP measurement procedure on Channel A Once the START button is pressed the icon NSOP stops flashing and the gauge begins recording a long term average NSOP pressure reading on Channel A During the measurement procedure the Channel B display is used as a timer to let the user know how long in seconds the NSOP measurement has been active The longer the measurement time generally the more stable the reading typically becomes In the screen to the right the measured NSOP pressure is 56 7 Pascals measured over the past 30 seconds Once you are satisfied with the NSOP reading press the ENTER key to accept and enter the reading into the gauge Turn off the air handler and leave the static pressure probe in place and connected to the gauge 0 5 7 b Step 2 Measuring the TFSOP and Adjusted Air Handler Flow Once the
43. el A Reference tap is protected from the wind Theother end of the tubing Ee ENERGY e Install the Blower Door fan with the should be run to the outside gt lt _ Leave tap open Flow Rings and No Flow Plate attached into the large hole in the nylon panel The exhaust side of the fan should be outside and the inlet side of the fan the side with the Flow Rings should be inside the building f Insert the female plug from the fan speed controller into the receptacle located on the fan electrical box The remaining cord power cord should be plugged into a power outlet that is compatible with the voltage frequency of the fan motor and speed controller g If your fan has a direction switch be sure it is set to blow air out of the building h The remaining end of the Red tubing should now be connected to the pressure tap on the Blower Door fan electrical box i If your DG 700 gauge and fan speed control are compatible for Cruise Control install the fan control cable into the 3 5 mm communication jacks located on the top of the DG 700 and on the side of the speed controller otherwise skip this step 2 Prepare the building for the Test a Close all exterior doors and windows and open all interior doors Because few house basements can be completely sealed from the house and usually some conditioning of the basement is desirable they are typically included as conditioned space b Adjust all combustion app
44. eraging period is shown in the TIME AVG portion of the gauge display See Section 1 5 for an overview of the time averaging periods During the Step 1 part of the procedure the time average feature is always set to long term average To change the selected time averaging period for the Step 2 part of the PR AH procedure press the AV 5 7 Test Procedure For Measuring Air Handler Flow OW 5 7 a Step 1 Measuring the NSOP Open a window or door between the building and outside to prevent pressure changes in the building during the test If the air handler fan is installed in an unconditioned zone e g crawlspace attic open any vents or access doors connecting that zone to the outside or to the building to prevent pressure changes in the zone during the test Make sure all supply and return registers are open and untapped Replace filters if they are dirty or keep dirty filters in place if you want to measure flow in a as found condition Turn on the air handler 20 Operating Instructions for the DG700 Chapter 5 _ Pressure Air Handler Flow Mode Insert a static pressure probe into the supply plenum or in a main supply trunk line a few feet away from the supply plenum Make sure the static pressure probe is pointing into the air flow created by the air handler fan Connect a piece of tubing to the static pressure probe Connect the other end of the tubing to the Channel A Input tap on the DG 700 The Channel A Referenc
45. ess panels or doors from these spaces to the outside 3 Connect tubing to DG 700 Pressure Gauge a Select a location to measure duct DG 700 Pressure amp Flow Gauge iat BEW pressure The best location for measuring duct pressure is often in the supply trunkline or plenum Drill a small hole 1 4 to 3 8 OD into the duct to allow a static pressure probe to be installed Install the static pressure probe ET i To Duct System with the end of the probe pointing into the air insert into register 5 Duct ma i tap in middle flow from the Duct Blaster fan If the duct or connect to static oe pressure probe gt lt of fan housing system is reasonably airtight e g less than 200 cfm25 of leakage duct pressures can be measured at any supply register by inserting Connect to inside of house if the end of the tubing through the temporary gauge is installed in the house agit fan is installed if fan and 1 leave this tap open Be sure CONSERVATORY gauge are in the same register seal window is open re O lt 4 space leave open b Connect tubing to the DG 700 as shown in the illustration to the right Connect to space where 4 Conducting the Test a Turn on the gauge by pressing the ON OFF button b Press the MODE button three times to put the guage into the PR FL 25 Mode In this Mode Channel A is used to measure duct system pressure while Channel B is used to display estimated duct leakage at a test
46. f the flexible tubing connections attached to the plate s pressure sensing grids remain out of the filter slot Occasionally drilling holes into the ductwork may be required as a pathway for the ends of the flexible tubing The flexible tubing can be passed through one of the plate s metering holes if this helps in getting the tubing ends outside of the filter slot e Obstructions within 6 inches upstream or 2 inches downstream of the metering plate that are blocking air flow through any of the metering holes may reduce the accuracy of the device e If there is an obstruction and there is a spacer attached to the metering plate try to install the metering plate so that the spacer is directly in front of the obstruction this will minimize the effect of the obstruction on the flow measurement e If the metering plate is installed directly downstream of a 90 degree bend in the duct system and there is a spacer attached to the plate install the metering plate so that the spacer is on the inside corner of the bend see diagram to right d Close the filter access opening Be careful not to pinch off the flexible tubing connections Temporarily seal around the filter slot cover with masking tape to prevent air leakage Note If you are installing the metering plate at the filter grille of a single return duct system simply push the plate into the empty filter rack Make sure that the front of the metering plate is facing out into the air flow Keep
47. g 50 Pa or 25 Pa The purpose of the EOLA estimate is to provide a simple physical interpretation of the cumulative size of the leaks measured by the airtightness test The EOLA estimates are not appropriate for use in specific infiltration models such as the LBL or AIM infiltration models which require leakage area estimates calculated using different equations and assumptions a 4 8 b 25 Mode The following equation is used to estimate leakage rates when in the 25 mode 25 0 60 Displayed Leakage Rate Measured Duct aaa Channel B Blaster Air Flow Rate Current Test Pressure Pa Channel A The following equation is used to estimate leakage area when in the 25 mode square inches Displayed Leakage Area Estimated Leakage Channel B Rate 5 3 CFM25 The following equation is used to estimate leakage area when in the 25 mode square centimeters Displayed Leakage Area Estimated Leakage Channel B Rate 0 8215 CFM25 0 4 8 c Errors in Leakage Estimates Tables 4 1 and 4 2 below show the errors in the 50 and 25 leakage estimates from the following 2 sources The actual test pressure Channel A not being equal to the target pressure i e 50 or 25 Pascals and The actual exponent of the leaks being measured differing from the assumed exponent of 0 65 for 50 and 0 60 for 25 For example Table 4 1 shows that for a one point 50 Pa Blower Door building airtightness test a 2 5 error would be
48. g run tubing from the Channel A Reference tap to outside and leave the Channel A Input tap open to the building assumes the gauge is in the building With the exhaust fan off turn on the gauge and leave it in the PR PR mode Press the BASELINE button The word BASELINE will begin to flash in the Channel A display indicating that the baseline feature has been initiated At this point the gauge is monitoring the real time Channel A baseline pressure reading but is not recording the reading The Channel B display is not active at this time Press the START button to begin the baseline measurement procedure on Channel A Once the START button is pressed the word BASELINE stops flashing and the gauge begins recording a long term average baseline pressure reading on Channel A During the baseline measurement procedure the Channel B display is used as a timer to let the user know how long in seconds the baseline measurement has been active The longer the measurement time generally the more stable the baseline reading typically becomes In the screen to the right the measured baseline pressure is 2 6 Pascals measured over the past 45 seconds BASELINE Once you are satisfied with the baseline pressure reading press the ENTER key to accept and enter the baseline pressure reading into the gauge After pressing ENTER Channel A will now display the baseline adjusted pressure reading i e the measured base
49. h the device is unreliable i e you are trying to measure a flow outside of the calibrated range of the test device in its current configuration If possible you should change the test device configuration to match the flow rate being measured e g install a Flow Ring or a smaller Flow Ring Be sure the fan is off when changing Flow Rings Note If you change the Flow Ring on the fan be sure to change the Configuration setting on the gauge to match the installed Ring Operating Instructions for the DG700 Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices A 3__Using the TrueFlow Air Handler Flow Meter and the DG 700 Digital Gauge 1 Measure the Normal System Operating Pressure NSOP with the existing filter in place a Locate the air handler system filter and replace if it is dirty b Install a static pressure probe into the ductwork at one of the 3 locations listed below e Insert the static pressure probe into the side surface of the supply plenum The side of the supply plenum chosen should not have a trunk line distribution duct or supply register connected to it The static pressure probe should point into the airstream e Or insert the tip of the static pressure probe into a dead end corner of the supply plenum A dead end corner is a corner of the plenum that does not have a trunk line connection distribution duct connection or supply register within 8 inches of the corner e Or inser
50. he DG700 Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices A 5 Using the DG 700 s Cruise Control Feature All new DG 700 gauges include a Cruise Control feature which allows you to automatically control Minneapolis Blower Door and Duct Blaster fans to maintain a constant building or duct pressure without having the gauge connected to a computer Common applications of the Cruise Control feature include e Quickly measuring building airtightness using a one point 50 Pa test e Quickly measuring duct airtightness using a one point 25 Pa total leakage test e Simultaneously controlling both the Blower Door and Duct Blaster fans during a leakage to outside duct airtightness test During this test Cruise Control on the Blower Door s DG 700 will maintain a contant 25 Pa building pressure while the DG 700 gauge connected to the Duct Blaster fan maintains a constant 0 Pa pressure in the duct system e Maintaining a constant building pressure while pressure pan testing or locating and sealing building and duct system air leaks e Performing series leakage to quantify leakage rates between various zones within a building In order to use the Cruise Control feature you will need the following 3 items A Cruise compatible DG 700 gauge Your DG 700 is compatible with Cruise Control if the CONFIG CLEAR START and ENTER keys have additional red lettering below the main black script A Blo
51. ime Averaging Periods Q 1 5 b Illustration of Time Averaging Operation First 10 seconds of operation Q 1 5 c Resetting the Time Averaging Measurement Buffer 1 6 Overview of the Baseline Pressure Measurement Feature Channel A Q 1 6 a Buttons Used with Baseline Pressure Feature LI 1 6 6 Restarting the Baseline Measurement Q 1 6 c Clearing and Exiting from the Baseline Pressure Procedure 1 7 Auto Off Feature CHAPTER 2 PRESSURE PRESSURE MODE 2 1 Mode Summary 2 2 Overview of Pressure Pressure Mode 2 3 Changing the Pressure Units 2 4 Changing the Time Averaging Period 2 5 Using the Baseline Pressure Feature Q 2 5 a Example Measuring Building Depressurization from an Exhaust Fan CHAPTER3 PRESSURE FLOW MODE 3 1 Mode Summary 3 2 Overview of Pressure Flow Mode 3 3 Changing the Selected Test Device and Configuration 3 4 LO Displayed on Channel B 3 5 Changing the Air Flow Units 3 6 Changing the Time Averaging Period 3 7 Using the Baseline Pressure Feature in Pressure Flow Mode Q 3 7 a Example Using the Baseline Feature During a Blower Door Depressurization Test oon oo O O O N NN OO oOo ost BR BR RP WO ND VYONY YM AH AHA H H h 11 11 11 12 12 12 12 12 Q 3 7 6 Entering Baseline Readings into TECTITE Software When Using the Baseline Feature CHAPTER 4 PRESSURE FLOW 50 AND 25 MODES 4 1 Mode Summary 4 2 Overview of Pressure Flow 50 and 25 Modes LI 4 2 a Pressure Flow 5
52. ing through the device is unreliable i e you are trying to measure a flow outside of the calibrated range of the test device in its current configuration If possible you should change the test device configuration to match the flow rate being measured e g install a Flow Ring or a smaller Flow Ring Be sure the fan is off when changing Flow Rings Note If you change the Flow Rings on the fan be sure to change the Configuration setting on the gauge to match the installed Ring 2T Operating Instructions for the DG700 Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices A 2 One Point 25 Pascal Total Leakage Duct Pressurization Test Using the Series B Minneapolis Duct Blaster and DG 700 Digital Gauge 1 Connect the Duct Blaster fan to the duct system a Choose a location to install the Duct Blaster fan In single double or triple returned systems the largest and closest return to the air handler is usually the best choice Note In multi return systems a return in every room installing at the air handler cabinet is often best b Remove any remote filters from the chosen return and then connect the black square transition piece to the return using temporary tape Completely seal the remaining open area of the return with tape c Pull the Duct Blaster fan and flex duct out of the carrying case Connect the flex duct to the exhaust side of the fan i e the side with the metal guard using the round
53. ition turn the controller knob clockwise only until you feel the click and no farther the fan will not be turning Duct Blaster just on turn the controller knob all the way down counter clockwise and flip the on off switch to ON the fan will not be turning Begin Cruise button When you are ready to begin Cruise press Begin Cruise to enter Cruise setup A Cruise target pressure will appear in the Channel A display and the Cruise icon will flash The flashing Cruise icon indicates that the gauge is ready to begin Cruising but is not yet controlling the fan If you are in the PR FL or PR PR modes you may change the Cruise target pressure at this point by pressing the Cruise Target button Note You can not change the Cruise target pressure when in the PR FL 50 and PR FL 25 modes Start Fan button Press Start Fan to instruct the DG 700 to begin ramping up the fan to achieve the target pressure on Channel A The fan will slowly start increasing speed until the pressure reading on Channel A matches the Cruise target pressure The fan will simply run at full speed if the target pressure can not be achieved Whenever the DG 700 is calling for full fan speed the gauge will emit a beeping sound Stop Fan button Press Stop Fan to turn off the fan when you are done Cruising When the fan is turned off by pressing Stop Fan the DG 700 returns to the Cruise setup state i e the Cruise icon is flashing and a Cruise target pressure
54. lacement The DG 700 is powered by 6 AA batteries located in the battery compartment on the back of the gauge We recommend that Alkaline or rechargeable batteries e g nickel metal hydride or NiCd be used with this gauge Whenever the gauge is turned on the battery voltage is measured and temporarily displayed in the Channel B display area 0 7 2 a Low Battery Indicators A low battery icon BAT begins to blink on the gauge display when it is time to replace or recharge the batteries The BAT icon is set to appear when the measured battery voltage drops below 6 0 volts The gauge will continue to provide reliable operation for a short time following appearance of the BAT icon Once the batteries have discharged to a level which prohibits reliable operation the words LO BAT appear in the Channel A and B display areas and the gauge will no longer function Fully charged batteries will typically provide 4 5 days of continuous operation before the BAT icon appears on the gauge display U 7 2 b Battery Replacement To remove the existing batteries from the battery compartment first turn off the gauge and then remove the battery compartment cover plate by sliding it away from the gauge Carefully remove each battery from the battery compartment Carefully replace the 6 AA batteries Be sure to insert the batteries with the proper polarity as illustrated on the inside of the battery compartment Replace the battery compartment c
55. laptop computer TECTITE 3 0 or higher software CD Connection Instructions li Install the TECTITE software onto your computer Once the software is installed run the TECTITE program and access the TECTITE Operation Manual directly from the program s Help Menu Refer to this manual on how to operate the TECTITE software Install the Blower Door system as described in the Blower Door operation manual Connect the DG 700 to your computer using either a USB cable or a 9 pin serial communication cable If using a USB cable follow these instructions Insert the installation CD labeled USB Drivers for DG 500 and DG 700 Digital Pressure Gauges into a CD drive on your computer this CD should have been provided with all DG 700 gauges equipped with a USB Communication Port Your computer should automatically run the file autoinstall bat from the CD which will install the necessary USB drivers onto your computer Once the USB drivers are installed plug the A larger end of the USB communication cable into an open USB port on your computer Plug the mini B smaller end of the cable into the USB Communication Port on top of the DG 700 The computer operating system should locate the DG 700 gauge and perform the necessary setup on your computer If using a 9 pin serial cable plug the male end of the cable into the serial communication port on the top of the gauge and the female end of the cable should
56. liances so that they do not turn on during the test c Be sure all fires are out in fireplaces and woodstoves Close all fireplace and wood stove doors to prevent scattering of ashes d Turn off any exhaust fans vented dryers and room air conditioners 3 Conducting the Test a Turn on the DG 700 by pressing the ON OFF button b Press the MODE button twice to put the gauge into the PR FL 50 Mode In this Mode Channel A is used to measure building pressure while Channel B is used to display the estimated building leakage at a test pressure of 50 Pascals The leakage estimate shown on Channel B is determined by mathematically adjusting the actual air flow from the Blower Door fan using the Channel A building pressure reading and a Can t Reach Pressure factor Operating Instructions for the DG700 Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices c With the fan inlet still covered press the BASELINE button to initiate the building baseline measurement procedure on Channel A Press START to begin the baseline measurement During a baseline measurement Channel A will display a long term average baseline pressure reading while Channel B is used as a timer in seconds to show the elapsed measurement time When you are satisfied with the baseline measurement press the ENTER button to accept and enter the baseline reading into the gauge The Channel A display will now show an ADJ icon to indicate that it
57. line pressure reading will be Operating Instructions for the DG700 Chapter2 Pressure Pressure Mode subtracted from the current Channel A pressure measurement The icon ADJ appears in the Channel A display to indicate that the baseline adjusted pressure reading is displayed The time averaging period for the gauge reverts back to whatever period was selected prior to pressing the BASELINE button Note At this point Channel B also reverts back to displaying an unadjusted pressure reading Turn on the exhaust fan Channel A will now display the actual change in building pressure created by the exhaust fan In the screen to the right the building depressurization measured from the exhaust fan operating is 4 2 Pascals i e the building pressure changed from 2 6 Pa to 6 8 Pa when the exhaust fan was turned on While displaying the baseline adjusted pressure on Channel A the user can change the selected time averaging period if the pressure reading is fluctuating more than desired Channel B can be used to simultaneously measure any other unadjusted pressure signal such as the flue pressure in a combustion appliance Note Pressing the CLEAR button clears the baseline measurement buffer and turns the baseline feature off If the gauge Mode is changed while the baseline measurement feature is active the baseline measurement buffer is cleared and the baseline feature is turned off 10 Operating Instructi
58. me Channel A baseline building pressure i e the existing building pressure caused by stack and wind effects but is not recording the reading The Channel B display is not active at this time BASELINE Press the START button to begin the baseline measurement procedure on Channel A Once the START button is pressed the word BASELINE stops flashing and the gauge begins recording a long term average baseline eer building pressure reading on Channel A During the baseline measurement procedure the Channel B display is used as a timer to let the user know how long in seconds the baseline measurement has been active The longer the measurement time generally the more stable the baseline reading typically becomes In the screen to the right the measured baseline building pressure is 3 8 Pascals measured over the past 60 seconds Once you are satisfied with the baseline pressure reading press the ENTER key to accept and enter the baseline pressure reading into the gauge After pressing ENTER Channel A will now display the baseline adjusted building pressure reading i e the measured baseline pressure reading will be subtracted from the current Channel A pressure measurement The icon ADJ appears in the Channel A display to indicate that the baseline adjusted pressure reading is displayed The time averaging period for the gauge reverts back to whatever period was selected prior to pressing the BASELINE button Channel
59. nce correction factor calculated from the NSOP and TFSOP pressure readings If the readings are fluctuating change the time averaging setting to 5 second 10 second or Long Term average using the TIME AVG button c Record the adjusted air flow reading from Channel B In the screen to the right the adjusted air flow reading is 1 566 CFM This result is the estimated air flow at the measurement location with the existing filter in place Turn off the air handler fan Note When the TrueFlow Air Handler Flow Meter is installed at a remote filter grille it is possible to make a correction to the measured flow through the metering plate which increases the accuracy of the flow measurement See Appendix C of the TrueFlow manual for more details Operating Instructions for the DG700 Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices A 4 DG 700 Connections Needed to Conduct Automated Blower Door Tests In order to perform fully automated Blower Door tests using a DG 700 you will need the following components A fan control cable to connect the fan control output jack on the DG 700 to the communication jack on the side of the Blower Door fan speed controller Note If your Blower Door speed controller does not have a communication jack on the side of the controller box you will need to purchase a new speed controller A communication cable either USB A mini B or 9 pin serial to connect the DG 700 to your
60. nd Average 5 Both measurement channels are updated once every 5 seconds with the average of the readings from the previous 5 second period When first activated the display shows until the first 5 second measurement buffer has been recorded The 5 Second Average should be used when the J Second Average reading is fluctuating more than desired 10 Second Average 10 Both measurement channels are updated once every 10 seconds with the average of the readings from the previous 10 second period When first activated the display will show until the first 10 second measurement buffer has been recorded The 10 Second Average mode should be used when the 5 Second Average reading is fluctuating more than desired Long Term Average L Both measurement channels are updated once per second with the running average of all readings taken after the Long Term Average period is activated When using Long Term Average the gauge continuously adds the current measurements to the measurement buffer and displays the average value of all recorded measurements The gauge will operate for approximately 2 hours when using Long Term Average before the measurement buffer is overloaded When the buffer is overloaded both channel readings will re start a new long term average period 0 1 5 b Illustration of Time Averaging Operation First 10 seconds of operation I Second Average 5 Second Average Seconds 1 2 3 4 Seconds 1 2 3 4 5 6 7 8 9 10
61. od channels The default time averaging period is Z second average To change the selected time averaging period press the TIME AVG button The selected time averaging period is shown in the TIME AVG portion of the gauge display See Section 1 5 for an overview of the time averaging feature The DG 700 has a choice of 4 time averaging periods which are applied to both pressure measurement AVG 2 5 Using the Baseline Pressure Feature The Baseline feature on Channel A allows the user to measure and record a START ENTER baseline pressure reading and then display the baseline adjusted pressure reading See Section 1 6 for an overview of the baseline pressure feature 0 2 5 a Example Measuring Building Depressurization from an Exhaust Fan A common building performance application requiring use of a baseline pressure reading is determining the extent of building depressurization caused by turning on an exhaust fan In order to accurately quantify the building depressurization the user first needs to know the building pressure with reference to outside prior to the exhaust fan being turned on This initial pressure reading known as the baseline building pressure can be quickly measured and then used to adjust the final building pressure reading after the exhaust fan is turned on to determine the actual change in building pressure caused by fan operation Set up Channel A to measure building pressure with reference to outside e
62. ons for the DG700 Chapter 3 _Pressure Flow Mode Chapter 3 Pressure Flow Mode 3 1 Mode Summary Mode Application Channel A Display Channel B Display Pressure Flow Multi purpose Pressure in Pascals Nominal unadjusted air flow from the PR FL pressure and air flow selected Energy Conservatory test measurements device in units chosen CFM m h 1 s 3 2 Overview of Pressure Flow Mode The Pressure Flow mode is a multi purpose mode used to measure a test pressure on Channel A while simultaneously measuring air flow from an Energy Conservatory test device on Channel B The Pressure Flow mode a very versatile operating mode and is typically used whenever simultaneous pressure and air flow measurements are needed except when using the specialized PR FL 50 PR FL 25 and PR AH modes the gauge display is PR FL When first entering this mode the default pressure units on Channel A is Pascals the default air flow units on Channel B is CFM cubic feet per minute and the default selected test device is the Model 3 110V Minneapolis Blower Door The default time averaging period is J second average mone To select the Pressure Flow mode press the MODE button until the selected operating mode shown on 3 3 _ Changing the Selected Test Device and Configuration The DG 700 can display air flow from the following Energy Conservatory test devices on DEVICE CONFIG Channel B Model 3 110V Minneapolis Blower Door fans BD 3
63. orm may be brought against the Seller more than one year after the cause of action has accrued The Customer is deemed to have accepted the terms of this Limitation of Warranty and Liability which contains the complete and exclusive limited warranty of the Seller This Limitation of Warranty and Liability may not be amended or modified nor may any of its terms be waived except by a writing signed by an authorized representative of the Seller TO ARRANGE A REPAIR Please call The Energy Conservatory at 612 827 1117 before sending any product back for repair or to inquire about warranty coverage All products returned for repair should include a return shipping address name and phone number of a contact person concerning this repair and the purchase date of the equipment Table of Contents CHAPTER 1 FEATURE SUMMARY 1 1 Feature List LJ 1 1 a Pressure Measurements 1 6 Auto Zeroing 1 c Time Averaging 1 d Air Flow and Velocity Measurements 1 e Display HOLD 1 f Specialized 50 and 25 Leakage Measurement Mode 1 g Specialized Air Handler Flow Measurement Mode 1 h Automated Blower Door Testing Cruise Control and Data Logging Boo ooo 1 2 Overview of Gauge Operating Modes 1 3 Gauge Face and Buttons 1 4 Input Output Ports on the DG 700 Q 1 4 a USB and Serial Communication Ports 0 1 4 6 Fan Control Output Jack Q 1 4 c AC Power Input Jack 1 5 Overview of the Time Averaging Feature Q 1 5 a Description of T
64. over 24 Operating Instructions for the DG700 Chapter 7 Servicing and Maintenance 7 3 Troubleshooting Resetting the DG 700 If the DG 700 gauge locks up or otherwise appears to be displaying inconsistent readings try the following steps to reset the gauge Simply turn the gauge off for 5 seconds and then turn it back on using the ON OFF button If turning the gauge off and on does not take care of the problem or you were unable to turn the gauge off first remove the batteries from the battery compartment Once the batteries have been removed hold down the ON OFF button for 10 seconds to fully discharge the gauge s internal electronic components Carefully replace the 6 AA batteries Be sure to insert the batteries with the proper polarity as illustrated on the inside of the battery compartment Turn the gauge back on If neither of the steps above takes care of the problem you will need to send the gauge back to The Energy Conservatory for servicing see Section 7 1 b above 7 4 AC Power Supply Specifications The AC power input jack can be used with an optional AC power supply to provide a long term power source for the gauge to be used when data logging The gauge is normally powered by 6 AA batteries located in the rear battery compartment When the AC power supply is plugged in the power supply bypasses the batteries in the battery compartment Note Always turn off the gauge before plugging in the AC power
65. r knob clockwise As the fan speed increases the duct pressurization displayed on Channel A should also increase Continue to increase the fan speed until the duct pressurization shown on Channel A is between 20 and 30 Pascals Do not waste time adjusting and re adjusting the fan speed control to achieve a test pressure of exactly 25 Pascals e Channel B will now display the One Point 25 Pascal Total Duct Leakage estimate If the leakage estimate is fluctuating more than desired try changing the Time Averaging setting on the gauge by pressing the TIME AVG button and choosing the 5 or 10 second or Long term averaging period If or LO appear on Channel B see 5 below or LO appearing on Channel B Whenever or LO appears on Channel B in the PR FL 25 Mode the DG 700 can not calculate a reliable 99 leakage estimate The messages and LO appear on Channel B under the following three conditions a is continuously displayed when the duct test pressure from Channel A is below a minimum value of 5 Pascals Estimating duct leakage results when the test pressure is below this value may result in large errors If possible install a larger Flow Ring or remove the Flow Rings to generate more fan flow b LO is continuously displayed when there is negligible air flow through the test device c LO alternates with a flow reading when the air flow reading throug
66. speed controller using the fan control cable Plug one end of the cable into the 3 5 mm fan control output jack on the top of the DG 700 and plug the other end of the cable into the communication jack on the side of the fan speed controller box Fan Control Cable Communication Jack Blower Door Speed Controller 5 Connect tubing between the DG 700 and the Blower Door system tubing connections are detailed in the Blower Door operation manual To inside of building leave open if gauge is in the building To BD fan red tubing To space upstream of fan inlet If fan inlet and gauge are in the same space leave open To outside green tubing 6 Now turn on the Blower Door fan speed controller to the just on position the fan should not be turning in this position The speed control knob should be turned all the way down without being clicked into the off position 7 Turn on the DG 700 gauge 8 Refer to the TECTITE and Blower Door manuals for instructions on how to conduct the Blower Door test Operating Instructions for the DG700 Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices Communication Cable USB or 9 pin Serial To Computer Building Pressure A Reference Doo Green Hose n Fan Pressure Red Hose B Input To Power Source Fan Control Cable lt _ Fan Power Cord Operating Instructions for t
67. t of building depressurization caused by turning on an exhaust fan In order to accurately quantify the building depressurization the user first needs to know the building pressure with reference to outside prior to the exhaust fan being turned on This initial pressure reading known as the baseline building pressure can be quickly measured and then used to adjust the final building pressure reading after the exhaust fan is turned on to determine the actual change in building pressure caused by fan operation In the example below the building depressurization measured from the exhaust fan operating is 4 2 Pascals i e the building pressure changed from 2 6 Pa to 6 8 Pa when the exhaust fan was turned on 0 1 Change in Building _2 Pressure From Turning On an 3 Piscine Exhaust Fan Pa 4 Building Pressure Baseline 5 Fan Off Adjusted 6 Building Pressure 7 Change from Building Turning Fan On Pressure Fan On LJ 1 6 a Buttons Used with Baseline Pressure Feature pressure measurement feature The word BASELINE will begin to flash in the Channel A display indicating that the baseline feature is active At this point the gauge is monitoring the real time Channel A pressure reading but is not recording the reading The Channel B display is not active at this time Press the START button to begin recording a baseline pressure reading Once the START button is pressed the word BASELINE stops
68. t the static pressure probe in the side surface of the return plenum The side of the return plenum chosen should not have a trunk line return duct or return register connected to it The location chosen should also be at least 24 inches upstream from the TrueFlow Metering Plate and at least 24 inches downstream from any 90 degree corners or return trunk line connections The static pressure probe should point into the airstream Note if the Metering Plate will be installed at a remote filter grille the static pressure probe may not be installed in the return plenum i e install it in the supply plenum c Connect a piece of tubing between the static pressure probe and the Channel A Input tap If the gauge is in the house during the test procedure leave the Reference tap on Channel A open If the gauge is not in the house during the test procedure e g attic crawlspace run additional tubing from the Channel A Reference tap to inside the house d Turn on the air handler fan to the desired speed Now turn on the gauge and put it the PR AH mode by pressing the MODE button 4 times The icon NSOP will begin to flash in the Channel A display At this point the gauge is monitoring the real time Channel A NSOP pressure but is not recording the reading The Channel B display is not active at this time e Press the START button to begin the NSOP measurement procedure on Channel A Once the START button is pressed the NSOP icon stops flashing
69. the test device in its current configuration If possible the user should change the test device configuration to match the flow rate being measured e g install a flow ring or a smaller flow ring 3 5 Changing the Air Flow Units CFM m hr or I s The default air flow unit is CFM To change the air flow unit for Channel B press the UNITS button The selected air flow units are shown on the gauge display directly below the Channel B readings The pressure unit for Channel A is always Pascals when in the PR FL mode unis When in the PR FL operating mode the DG 700 can display air flow readings on Channel B in units of UNITS 3 6 Changing the Time Averaging Period The selected time averaging period is shown in the TIME AVG portion of the gauge display See To change the selected time averaging period for both Channel A and B press the TIME AVG button AVG e A A Section 1 5 above for a complete description of the time averaging periods 3 7 Using the Baseline Pressure Feature in Pressure Flow Mode The Baseline feature on Channel A allows the user to measure and record a START ENTER baseline pressure reading and then display the baseline adjusted pressure reading This feature is commonly used during both building and duct airtightness test procedures where the user wishes to display the actual change in building or duct pressure caused by operation of the Blower Door or duct airtightness testing fan In order
70. uise Target Used to select the Cruise Target Pressure 3 Operating Instructions for the DG700 Chapter 1__ Feature Summary 1 4 Input Output Ports on the DG 700 LY 1 4 4 USB and Serial Communication Ports The DG 700 contains both a USB and a DB 9 serial communication port either of which can be used to create a 2 way communication link between the gauge and a computer This communication link can be used along with TEC software to conduct automated Blower Door tests and to data log both pressure channels Automated Blower Door testing requires the TECTITE TECTITE Express or TECLOG2 software a Blower Door fan speed controller with a communication jack standard equipment since September 2004 a fan control cable and a communication cable either USB or 9 pin serial to connect the DG 700 to a user supplied laptop computer Data logging of pressure measurements requires the TECLOG2 software available from www energyconservatory com and a communication cable either USB or 9 pin serial to connect the DG 700 to a user supplied laptop computer 0 1 4 b Fan Control Output Jack The fan control output jack provides a speed control signal which is used to control a Blower Door or Duct Blaster fan during an automated Blower Door test or with the Cruise Control feature A fan control cable is used to connect the fan control output jack to the communication jack on the side of the fan speed controller 0 1 4 c AC Power Input
71. ves Glia Human Interface Devices HE IDE ATA ATAPT controllers ES gt Keyboards Mice and other pointing devices aS Monitors H Network adapters a rey Ports COM amp LPT co Communications Pork COM1 a Communications Port COM oo ECP Printer Port LPT1 i The Energy Conservatory USB Device COM3 ps Processors pe Sound video and game controllers A System devices ce Universal Serial Bus controllers COMI and COM2 are existing serial communication ports which can be used to communicate with a DG 700 gauge using a standard 9 pin serial cable COMS3 is a custom communication port created by successfully installing the USB drivers for the DG 700 gauge Note In order for a custom device communication port to be listed under the Ports icon the DG 700 gauge must be connected to your computer a ed Ports COM amp LPT a Communications Pork COM 1 4 oy Communications Pork COMz oy ECP Printer Port LPT1 The Energy Conservatory USB Device COM If no COM ports are listed or a Ports icon does not exist then either the computer does not have installed serial communication ports you have not properly installed the USB drivers to create a custom USB Device communication port or a DG 700 gauge is not connected to the computer Operating Instructions for the DG700 Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices 4 Connect the DG 700 to the Blower Door fan
72. wer Door or Duct Blaster fan speed controller with a 3 5 mm communication jack on the side of the controller box A fan control cable to connect the DG 700 fan control jack to the speed controller communication jack Fan Control cable Fan control cable Minneapolis Geert Baneri Th ENEEGY Sa COONEY ATC N 36 Operating Instructions for the DG700 Appendix A Quick Guides for Using the DG 700 with Energy Conservatory Test Devices Cruise Overview Cruise Control uses the DG 700 s fan control feature to continuously adjust the Blower Door or Duct Blaster fan to maintain a constant Cruise target pressure on Channel A of the gauge Cruise Control can be used in the following gauge Modes to maintain the listed target pressures Gauge Mode Cruise Target Pressures Available PR FL 50 PR FL 25 75 Pa 50 Pa 25 Pa 0 0 PR PR 75 Pa 50 Pa 25 Pa 0 0 Before starting Cruise the Blower Door or Duct Blaster and DG 700 should be completely set up including tubing connections the gauge should be in the Mode you wish to use and the correct Device and Configuration settings should be entered If you wish to Cruise with a baseline pressure adjustment applied to Channel A simply use the Baseline feature first before beginning Cruise You will also need to install the fan control cable and turn the fan speed controller to the just on position Model 3 Blower Door just on from the off pos

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