TEC DG-700 Operating Instructions Manual Download Page 42

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Appendix A

Quick Guides for Using the DG-700 with Energy Conservatory Test Devices

Communication Cable
(USB or 9 pin Serial) To
Computer

Fan Control
Cable

To Power Source

Building Pressure
Green Hose
(A Reference)

Fan Pressure
Red Hose
(B Input)

Fan Power
Cord

Operating Instructions

for the DG700

Summary of Contents for DG-700

Page 1: ...Operating Instructions for the DG 700 Pressure and Flow Gauge...

Page 2: ......

Page 3: ...Operating Instructions for the DG 700 Pressure and Flow Gauge The Energy Conservatory 2801 21st Ave S Suite 160 Minneapolis MN 55407 Ph 612 827 1117 Fax 612 827 1051 www energyconservatory com...

Page 4: ...f 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 PART...

Page 5: ...ime Averaging Measurement Buffer 5 1 6 Overview of the Baseline Pressure Measurement Feature Channel A 6 1 6 a Buttons Used with Baseline Pressure Feature 6 1 6 b Restarting the Baseline Measurement 7...

Page 6: ...Pressure Air Handler Flow Mode 19 5 3 Changing the Selected Test Device and Configuration 19 5 4 or LO Displayed on Channel B 20 5 5 Changing the Air Handler Flow Units 20 5 6 Changing the Time Averag...

Page 7: ...del 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 Usi...

Page 8: ...er to measure and record a baseline pressure reading and then display the baseline adjusted pressure reading 1 1 b Auto Zeroing Auto zeroing feature for both measurement channels automatically adjusts...

Page 9: ...ure Flow PR FL Multi purpose pressure and air flow measurements Pressure in Pascals Nominal unadjusted air flow from the selected Energy Conservatory test device in units chosen CFM m3 h l s Pressure...

Page 10: ...Used to exit out of a Baseline pressure 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 C...

Page 11: ...onnect the DG 700 to a user supplied laptop computer 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 fa...

Page 12: ...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...

Page 13: ...le 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 1 6 a Buttons U...

Page 14: ...ressure 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 bas...

Page 15: ...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 Reference tap and r...

Page 16: ...ing pressure caused by fan operation 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 ta...

Page 17: ...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 adjust...

Page 18: ...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 1 second average 3 3 Changing the...

Page 19: ...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 baseline pressure reading and then display the baseline adjusted...

Page 20: ...rts back to whatever period was selected prior to pressing the BASELINE button Channel 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 No...

Page 21: ...ssure of 50 Pascals The leakage estimate shown on Channel B is determined by mathematically adjusting the measured air flow from the selected Blower Door fan using the real time Channel A building pre...

Page 22: ...inneapolis 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 B Minneapolis Duct...

Page 23: ...s 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 duc...

Page 24: ...in the 25 mode square inches The following equation is used to estimate leakage area when in the 25 mode square centimeters 4 8 c Errors in Leakage Estimates Tables 4 1 and 4 2 below show the errors i...

Page 25: ...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 Actual exponent n Table 4 1 Error in Leakage Estimate for 50 Mode 0 5 0 55 0 6 0 65 0 7 0 75 Test 5 14 9 7 7 0...

Page 26: ...e 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 simu...

Page 27: ...n units of CFM m3 hr and l 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...

Page 28: ...ly 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 pr...

Page 29: ...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 g...

Page 30: ...ing mode the DG 700 can display air velocity readings on Channel B in units of feet per minute or meters per second To change the air velocity units for Channel B press the UNITS button The selected u...

Page 31: ...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 When...

Page 32: ...olarity 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 Conser...

Page 33: ...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...

Page 34: ...ise As the fan speed increases the building depressurization displayed on Channel A should also increase Continue to increase the fan speed until the building depressurization shown on Channel A is be...

Page 35: ...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 R...

Page 36: ...justing 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 m...

Page 37: ...erence 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 ai...

Page 38: ...tering 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 Gr...

Page 39: ...ed in the Blower Door operation manual 3 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 in...

Page 40: ...lick 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 in...

Page 41: ...Door operation manual 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 dow...

Page 42: ...th Energy Conservatory Test Devices Communication Cable USB or 9 pin Serial To Computer Fan Control Cable To Power Source Building Pressure Green Hose A Reference Fan Pressure Red Hose B Input Fan Pow...

Page 43: ...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 Maintaining a constant building press...

Page 44: ...sure 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...

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