Retrotec DM32 User Manual

Retrotec Inc. Pressure Gauge Operation Man

Page 10 of 94 ©Retrotec Inc. 2014 2. Gauge overview The front of the gauge has a resistive touchscreen, a touch-sensitive [Home] button , and a b

Page 11 of 94 ©Retrotec Inc. 2014 be heated in hot water before being handled. Be careful to dry all water from the tubing prior to connecting sinc

Page 12 of 94 ©Retrotec Inc. 2014 Figure 4: Red light shows that gauge battery is charging When connected to the computer USB port, the gauge stil

Page 13 of 94 ©Retrotec Inc. 2014 Figure 7: Home screen keys when the gauge is idle (not controlling a fan) Figure 8: Home screen keys when gaug

Page 14 of 94 ©Retrotec Inc. 2014 2.5 Observe icons on Top Bar to monitor gauge status Icons on the Top Bar indicate the current status and various

Page 15 of 94 ©Retrotec Inc. 2014 The battery life indicator shows how much life is left in the rechargeable battery inside the gauge. A fully char

Page 16 of 94 ©Retrotec Inc. 2014 When the gauge is plugged into mains power on a completely depleted battery, it may take a few minutes to gain suf

Page 17 of 94 ©Retrotec Inc. 2014  Equivalent leakage area per enclosure area at 10 Pa, “EqLA10/area”: sq in/sq ft, sq cm/sq m)  Effective leak

Page 18 of 94 ©Retrotec Inc. 2014 Figure 12: Control a TEC fan using the gauge and Fan Speed Control Adapter (part FN275, produced by Retrotec)

Page 19 of 94 ©Retrotec Inc. 2014 “TrueFlow” 2.6.4. Estimate Results with [@ Pressure] The [@] pressure key enables the gauge to calculate an

Page 2 of 94 ©Retrotec Inc. 2014 Made by Retrotec Inc. 1060 East Pole Road Everson, WA USA 98247 For support: Call 1(888) 330-1345 in USA +1 (360

Page 20 of 94 ©Retrotec Inc. 2014 2.6.5. Setting “n value” for @Pressure extrapolation The “n value” is a number set between 0.5 and 1.0 that is us

Page 21 of 94 ©Retrotec Inc. 2014 3. Get Results directly from the gauge 3.1 Connect Speed Control Cable between the gauge and fan Refer to section

Page 22 of 94 ©Retrotec Inc. 2014 Figure 14: Change Device in use 3.3.3. Tap [Set Speed] to run the fan at a particular speed The gauge can auto

Page 23 of 94 ©Retrotec Inc. 2014 Figure 16: Adjust speed up or down 5% using [Jog] keys 3.3.5. Tap [Set Pressure] to achieve a particular enclos

Page 24 of 94 ©Retrotec Inc. 2014 3.3.6. Tap [Jog] keys to adjust pressure up or down 5 Pa Figure 18: Adjust pressure up or down 5 Pa using [Jog

Page 25 of 94 ©Retrotec Inc. 2014 Figure 20: Enter a [Volume] if Result to be displayed is "ACH" The [Volume] key from the Home screen

Page 26 of 94 ©Retrotec Inc. 2014 Figure 22: Remove "HOLD!" by tapping [Channel A] or a [Jog] key 3.3.9. Tap [Channel B] or [Settings]

Page 27 of 94 ©Retrotec Inc. 2014 Changing the Result to be displayed can occur even while the fan is running during [Set Pressure] or [Set Speed] s

Page 28 of 94 ©Retrotec Inc. 2014 When the gauge is controlling to a speed or pressure so that fan speed is not at 0%, the gauge can extrapolate the

Page 29 of 94 ©Retrotec Inc. 2014  Tapping [@ Pressure] so that it “is On” extrapolates the [Channel B] Result to the [Set Pressure] target entere

Page 3 of 94 ©Retrotec Inc. 2014 Copyright © 2012-2014 Retrotec Inc. All rights reserved. This document contains materials protected under Internati

Page 30 of 94 ©Retrotec Inc. 2014 Figure 31: [@ Pressure] extrapolates to “Default @ Pressure” when a speed is set  Tapping [@ Pressure] so tha

Page 31 of 94 ©Retrotec Inc. 2014 Figure 33: Stopping fan disables and turns [@ Pressure] off

Page 32 of 94 ©Retrotec Inc. 2014 4. Change [Settings] for gauge operating parameters Tapping [Settings] from the Home screen will bring up a menu t

Page 33 of 94 ©Retrotec Inc. 2014 Figure 35: Capture a Baseline 3. Tap [Settings][Baseline][Clear Baseline] at any time to clear the Baseline.

Page 34 of 94 ©Retrotec Inc. 2014 The area is required for the calculation of any of the results that are divided by an area – normalized leakage ar

Page 35 of 94 ©Retrotec Inc. 2014 Figure 39: Set the [Volume] needed for ACH Result from Home screen The [Volume] key on the “Settings” menu prov

Page 36 of 94 ©Retrotec Inc. 2014 Figure 41: Set [Area] using metric units when Result is displayed in metric units The choice of metric or imperi

Page 37 of 94 ©Retrotec Inc. 2014 Figure 43: Set the default @ pressure to be used as extrapolation pressure during set speed operation

Page 38 of 94 ©Retrotec Inc. 2014 4.6 Set [Time averaging] period Time averaging of 1s, 5s, 10s, 30s can be selected directly, or another value fo

Page 39 of 94 ©Retrotec Inc. 2014 4.7 Change Result and units to be displayed 1. Tap [Pressure] to change the units of pressure displayed for [Ch

Page 4 of 94 ©Retrotec Inc. 2014 Table of Contents Important equipment-related safeguards ...

Page 40 of 94 ©Retrotec Inc. 2014 Figure 46: Tap [Settings] to change Result being displayed 3. Tap the selected Result continuously to cycle th

Page 41 of 94 ©Retrotec Inc. 2014 4.8 Set up “Network” if using Ethernet connection 1. From the Home screen, tap [Settings] and then the […] key

Page 42 of 94 ©Retrotec Inc. 2014 Figure 48: Choose Disabled or Wired for the gauge Network connection 4.9 View and update the [Firmware] versio

Page 43 of 94 ©Retrotec Inc. 2014 The displayed white text indicates the firmware version first, then the serial number of the gauge after the dash.

Page 44 of 94 ©Retrotec Inc. 2014 Figure 51: Tap each red dot as they are presented, to re-calibrate touchscreen If your gauge touchscreen is not

Page 45 of 94 ©Retrotec Inc. 2014 5. Remotely run tests and save results with Retrotec software It is advantageous to connect the gauge to a compute

Page 46 of 94 ©Retrotec Inc. 2014 Figure 52: Use "Network" connector to connect a single gauge to a computer The “Network” connector on

Page 47 of 94 ©Retrotec Inc. 2014 Figure 54: Default Network Settings for direct connection to computer Figure 55: Numeric entry keypads to ent

Page 48 of 94 ©Retrotec Inc. 2014 Figure 56: Connect multiple gauges to a wired network using a powered Ethernet Switch Each gauge can be located

Page 49 of 94 ©Retrotec Inc. 2014 5. On each gauge, tap [Setttings][Network] [Status] until you see “Wired” 6. [Setttings][Network] [Mode] dep

Page 5 of 94 ©Retrotec Inc. 2014 3.3.9. Tap [Channel B] or [Settings] to change Result or units to be displayed ... 26 3

Page 50 of 94 ©Retrotec Inc. 2014 Figure 58: DM32 creates WiFi hotspot for computer or phone to join To set up the DM32 to generate the WiFi hots

Page 51 of 94 ©Retrotec Inc. 2014 1. Click on your PC desktop wireless icon to get a list of available WiFi networks the PC can join (as shown in F

Page 52 of 94 ©Retrotec Inc. 2014 the gauge via USB with the DM32 Configurator software on the computer. For instructions on setting network passwo

Page 53 of 94 ©Retrotec Inc. 2014 You should also see the “Network name (SSID)” that you entered directly or in the DM32 Configurator showing up in

Page 54 of 94 ©Retrotec Inc. 2014 6. Update gauge with new features New features are occasionally released for the gauge, in the same way that new f

Page 55 of 94 ©Retrotec Inc. 2014 Figure 63: Disable [Network] connection if using USB connection to a computer [Settings][Network] [Status] mu

Page 56 of 94 ©Retrotec Inc. 2014 7. Verify your gauge accuracy between factory calibrations Recommended calibration interval for the DM32 series is

Page 57 of 94 ©Retrotec Inc. 2014 Figure 64: Yellow tube between Channel A & B. Blue tube check of positive por

Page 58 of 94 ©Retrotec Inc. 2014 1. Set both channels to measure pressure in Pascals (Pa). 2. Connect the Input port of Channel A to the Input po

Page 59 of 94 ©Retrotec Inc. 2014 8. What to do if you have trouble with the gauge Knowing the common causes of erroneous readings will increase you

Page 6 of 94 ©Retrotec Inc. 2014 8.8 Calculated Result will be wrong if the Range and Device installed on fan are different than those selected on

Page 60 of 94 ©Retrotec Inc. 2014 8.2 Gauge may get stuck running “Re-calibrate touchscreen” if the battery gets into a low state If your gauge run

Page 61 of 94 ©Retrotec Inc. 2014 malfunction may be displayed on the Diagnostic Screen and the gauge will not show the Home Screen when the gauge s

Page 62 of 94 ©Retrotec Inc. 2014 Figure 67: The effect of a moving tube on pressure readings. 8.10 Fans with a single tube have results adjuste

Page 63 of 94 ©Retrotec Inc. 2014 EqLA10 which you can access using the [Channel B] key. Watch the gauge carefully to detect the peak pressure read

Page 64 of 94 ©Retrotec Inc. 2014 Figure 68: Errors in pressure reading from a pinched tube. It is possible to complete a Blower Door test with a

Page 65 of 94 ©Retrotec Inc. 2014  Whip the end of the tube around to remove excess water.  If this doesn’t work (in extreme cases), water can

Page 66 of 94 ©Retrotec Inc. 2014 To learn how Time Averaging can cause error 1. Create a pressure on the positive port of Channel A (Input). 2. S

Page 67 of 94 ©Retrotec Inc. 2014 2. Connect the open end to the T-connection on the basic wind-damping kit; connect the open tube to the output po

Page 68 of 94 ©Retrotec Inc. 2014 9. Technical Specifications Retrotec DM32 Dimensions (l × w × h) 14.7 × 9.2 × 3.5 cm 5.79 x 3.62 x 1.38 in

Page 69 of 94 ©Retrotec Inc. 2014 EN 300 328 V1.7.1 (2006-10) 4.3.7 Receiver Spurious Emissions 5.7.6

Page 7 of 94 ©Retrotec Inc. 2014 Glossary ...

Page 70 of 94 ©Retrotec Inc. 2014 Appendix A: Understanding Pressures on the Gauge A high-performance digital differential pressure gauge offers a

Page 71 of 94 ©Retrotec Inc. 2014 A higher pressure on the positive (“input”) port than on the negative (“ref”) port displays a positive pressure on

Page 72 of 94 ©Retrotec Inc. 2014 Managing fluctuating pressures created by wind There are two types of pressure that wind creates, stagnation press

Page 73 of 94 ©Retrotec Inc. 2014 1% 5% 30 10 s 1.5 Pa 100 s 6.5% 1% 5% 30 20 s 0.5 Pa 100 s 5.9%

Page 74 of 94 ©Retrotec Inc. 2014 Appendix B: Flow Equations used with Devices The gauge can be used for testing either on its own, or connected t

Page 75 of 94 ©Retrotec Inc. 2014 2. Some newer versions of the Model 3 and 4 contain an additional Reference port. If available, connect the gree

Page 76 of 94 ©Retrotec Inc. 2014 If the flow of the fan is away from the operator holding the gauge, then the gauge and the operator are on the inl

Page 77 of 94 ©Retrotec Inc. 2014 The absolute value of FP must be greater than the minimum fan pressure, “MF”, shown in Table 8, and greater than t

Page 78 of 94 ©Retrotec Inc. 2014 Range N K K1 K2 K3 K4 MF D 0.5022 6.8700 0.000 1.0 0 1.0 15 E 0.5139 2.8170 0.000 1.0 0 1.0 15 Mn Model 4 230 V O

Page 79 of 94 ©Retrotec Inc. 2014 Appendix C: Manually estimate Flow if required test pressure cannot be reached If you have a situation where you

Page 8 of 94 ©Retrotec Inc. 2014 Important equipment-related safeguards Read and save these instructions When using electrical appliances, basic saf

Page 80 of 94 ©Retrotec Inc. 2014 Cannot Reach 50 Pa Factors Rather than using the equation in the situation where the 50 Pa test pressure cannot be

Page 81 of 94 ©Retrotec Inc. 2014 Cannot Reach 25 Pa Factors Rather than using the equation in the situation where the 25 Pa test pressure cannot b

Page 82 of 94 ©Retrotec Inc. 2014 Appendix D: Details about the @Pressure extrapolation function There is a way to estimate the flow at a target pr

Page 83 of 94 ©Retrotec Inc. 2014 For example: If we guess at the n value of a duct as being 0.6 and measure 100 CFM at 20 Pa (by accident or by de

Page 84 of 94 ©Retrotec Inc. 2014 Houses and ducts have many holes that will have both turbulent and laminar flow going through them. Duct holes te

Page 85 of 94 ©Retrotec Inc. 2014 Table 12: Errors in Estimated Flow at 50 Pa if gauge "n"= 0.65 differs from actual n Actual Flow Expo

Page 86 of 94 ©Retrotec Inc. 2014 In the tables, the Pressure of Interest is 50Pa, and Assumed n is 0.65 or 0.60 The actual flow exponent n for an

Page 87 of 94 ©Retrotec Inc. 2014 Appendix E: Tables to adjust Flow values for temperature difference Temperature correction is only required when

Page 88 of 94 ©Retrotec Inc. 2014 Table 15: Temperature correction factors for enclosure PRESSURIZATION 50 55 60 65 70 75 80 85 90-20 1.058 1.069

Page 89 of 94 ©Retrotec Inc. 2014 Appendix F: Tables to correct Flow if range selected did not match the installed range If the range installed was

Page 9 of 94 ©Retrotec Inc. 2014 1. Introducing the Retrotec DM32 series of digital gauge The DM32 is the next generation digital manometer, with to

Page 90 of 94 ©Retrotec Inc. 2014 Appendix G: Measure Supply or Exhaust flow with a gauge and box The Retrotec gauge can be used to measure the am

Page 91 of 94 ©Retrotec Inc. 2014 Tip: Box pressure of 8 Pa or less is recommended because higher pressures will decrease the exhaust fan flow rate

Page 92 of 94 ©Retrotec Inc. 2014 Glossary Term Definition Air Current Tester Neutrally buoyant smoke (manufactured by Retrotec Inc.) used to locate

Page 93 of 94 ©Retrotec Inc. 2014 Term Definition Envelope The surfaces composed of floor and walls and floors that separate the test volume from vo

Page 94 of 94 ©Retrotec Inc. 2014 Term Definition room pressure The pressure difference created by the Door Fan between inside and outside of the e