Retrotec DM-2A Bedienungsanleitung

Retrotec Inc. Operation Manual Pressure Gauges DM-2 rev-2013-12-02

Page 10 of 72 ©Retrotec Inc. 2012 “Rechargeable” under “Battery Type” otherwise the charger will not work. If you choose to use non rechargeable ba

Page 11 of 72 ©Retrotec Inc. 2012 To reset a DM-2 without using the Reset button 1. Remove the back panel labeled "Battery Compartment".

Page 12 of 72 ©Retrotec Inc. 2012 2 DM-2 Keypad Functions The DM-2 Keypad has 14 keys which control all of the DM-2 functions. 2.1.1 On/Off (Back

Page 13 of 72 ©Retrotec Inc. 2012 2.1.5 Mode “Mode” refers to the measurements and results the DM-2 mark II can display. Each Mode can also display

Page 14 of 72 ©Retrotec Inc. 2012 2.1.7 Setup The [Setup] key allows access to the “Setup” Menu, where the gauge is customized. Setup is used to e

Page 15 of 72 ©Retrotec Inc. 2012 the gauge will continuously display the updated average pressure, and the sampling duration on the screen. The mo

Page 16 of 72 ©Retrotec Inc. 2012 1. Press [Set Pressure] to activate the automatic control. Input the desired building pressure using the DM-2 ke

Page 17 of 72 ©Retrotec Inc. 2012 2.1.13.2 Jog Jog functions differently depending on whether the gauge is setting pressure or setting speed.  Ena

Page 18 of 72 ©Retrotec Inc. 2012 1. Press [@ Pressure] to view the results at a particular pressure, as set in the Setup Menu. The units will cha

Page 19 of 72 ©Retrotec Inc. 2012 3 Set the Gauge up with only the Devices and results you use regularly While the gauge can be run using the defau

Page 2 of 72 ©Retrotec Inc. 2012 1 DM-2 Digital Gauge Basics ...

Page 20 of 72 ©Retrotec Inc. 2012 Notice that the [Time Avg] key is located in the middle of all the arrow keys on the keypad. As a user friendly f

Page 21 of 72 ©Retrotec Inc. 2012 3.1.3 Language The gauge can display information in the following languages: English, French, German, Norwegian,

Page 22 of 72 ©Retrotec Inc. 2012 3. Press [Enter]. The version of hardware and firmware as well as the date of last calibration is displayed. 4.

Page 23 of 72 ©Retrotec Inc. 2012 If the test pressure (20 in this case) is close to the desired reference pressure (25 Pa in this case), then the c

Page 24 of 72 ©Retrotec Inc. 2012 3. Input the new value. Press [Enter]. 3.1.8 Surface Area Unit To calculate some results (e.g. Flow/Area, EqLA

Page 25 of 72 ©Retrotec Inc. 2012 To change the European Separator units 1. Press [Setup] to access the “Setup” menu. 2. Press [] or [] to sele

Page 26 of 72 ©Retrotec Inc. 2012 Device Mfr Device displayed Description *Retrotec DU200 Model 200 fan, Q32 DucTester Retrotec 600/700 Obsolete

Page 27 of 72 ©Retrotec Inc. 2012 Mn Exhaust Fan Flow Meter Mn TrueFlow Grid Infiltec E3 3.2.1 Enable and Disable Devices To simplify the dev

Page 28 of 72 ©Retrotec Inc. 2012 determined which ones are the most often-used, cutting down on time required to prepare the gauge for each test.

Page 29 of 72 ©Retrotec Inc. 2012 White squares in the table are the most commonly used Modes and are set as defaults on your gauge. Grey settings

Page 3 of 72 ©Retrotec Inc. 2012 2.1.8 Baseline ...

Page 30 of 72 ©Retrotec Inc. 2012 4 Understand the Pressure Gauge A high-performance digital differential pressure gauge offers a number of advanta

Page 31 of 72 ©Retrotec Inc. 2012 A higher pressure on the positive (“Input”) port than on the negative (“Reference”) port displays a positive press

Page 32 of 72 ©Retrotec Inc. 2012 on the gauge. Note that it's important to zero the analog gauge by tapping the front panel before use, as re

Page 33 of 72 ©Retrotec Inc. 2012 5 Reduce Bias pressures, static or fluctuating Wind blowing across the tip of a tube will cause a significant pre

Page 34 of 72 ©Retrotec Inc. 2012 1. Be 15 feet from the building 2. Terminate in a T 3. Have 2 pickup points at least 20 feet apart attached to

Page 35 of 72 ©Retrotec Inc. 2012 6 Reduce uncertainty in results by taking lots of readings Table 8 shows tests with approximate uncertainties tha

Page 36 of 72 ©Retrotec Inc. 2012 7 Check your gauge to see if it needs to be sent to factory for re-calibration Standard procedure says you calibr

Page 37 of 72 ©Retrotec Inc. 2012 If the readings are different, either one tube is blocked or the gauge is faulty. Try another tube to see if it’s

Page 38 of 72 ©Retrotec Inc. 2012 Figure 8: Gauge field check configuration: Cross gauge check When performing a gauge calibration with two gauge

Page 39 of 72 ©Retrotec Inc. 2012 Figure 10: Syringe check setup

Page 4 of 72 ©Retrotec Inc. 2012 To change the European Separator units...

Page 40 of 72 ©Retrotec Inc. 2012 8 Use the Gauge with a calibrated fan for air leakage testing The gauge can be used for testing either on its own

Page 41 of 72 ©Retrotec Inc. 2012 Figure 11: Pressure ports and control connections on the gauge. 8.1.2 Control connections  Speed Control – Con

Page 42 of 72 ©Retrotec Inc. 2012 4. Attach the yellow pressure tube to the yellow bulkhead fitting labeled “Ref B (fan)” on the fan. If available

Page 43 of 72 ©Retrotec Inc. 2012 10. To view estimated flow at a different pressure, use the [@ Pressure] function. 11. Either press [Set Speed] to

Page 44 of 72 ©Retrotec Inc. 2012 Tip: Box pressure of 8 Pa or less is recommended because higher pressures will decrease the exhaust fan flow rate

Page 45 of 72 ©Retrotec Inc. 2012 9 Troubleshooting After getting a clear understanding of what pressure is and how it's measured, knowing the

Page 46 of 72 ©Retrotec Inc. 2012 to the fan, but is in the path of the fan's air flow, can swing back and forth. This swinging motion can eas

Page 47 of 72 ©Retrotec Inc. 2012 9.2.2 Use Time Averaging feature to reduce the effects of wind Variable readings caused by changing input pressure

Page 48 of 72 ©Retrotec Inc. 2012 Retrotec offers two wind-damping kits specifically designed to reduce the pressure fluctuations due to wind. The b

Page 49 of 72 ©Retrotec Inc. 2012 To learn how Time Averaging can cause error 1. Create a pressure on the positive port of Channel A (Input). 2. S

Page 5 of 72 ©Retrotec Inc. 2012 9.2 Check if wind is causing fluctuating pressure ...

Page 50 of 72 ©Retrotec Inc. 2012 in fact the results are way off. Particularly unusual behavior in the gauge could mean that there is water in the

Page 51 of 72 ©Retrotec Inc. 2012 3. Move across the row and record the flow value beneath the column heading with the actual Range that was used.

Page 52 of 72 ©Retrotec Inc. 2012 Time averaging, seconds 4 4 4 4 4 4 4 Actual leakage area as measured, 8 in2 12 in2 16 in2 20 in2 24 in2 28 in2 3

Page 53 of 72 ©Retrotec Inc. 2012 2. Press the reset button on the back of the DM-2. The gauge turns on. Note: DM-2's that have firmware pri

Page 54 of 72 ©Retrotec Inc. 2012 1. Remove AC power adapter and USB cable. 2. Remove battery compartment cover and remove batteries. 3. There ar

Page 55 of 72 ©Retrotec Inc. 2012 Battery Type Not rechargeable, Rechargable Display Version Info 0.5-1.00 n 0.5-1.00 Power Down Hour 0-255 Surf

Page 56 of 72 ©Retrotec Inc. 2012 Appendix A: The gauge calculates Flow based on Pressure readings from the fan The air flow being produced by the

Page 57 of 72 ©Retrotec Inc. 2012 Any time the gauge sees a positive pressure on Channel A, it automatically subtracts the value on Channel A from t

Page 58 of 72 ©Retrotec Inc. 2012 Range N K K1 K2 K3 K4 MF 3000 / 3000SR C8 0.5000 78.5000 -0.020 0.5 0.0160 1.0 10 C6 0.5050 61.3000 0.054 0.5 0.0

Page 59 of 72 ©Retrotec Inc. 2012 Table 12: N and K coefficients for all gauge supported fans which are now Obsolete. Range N K K1 K2 K3 K4 MF DU1

Page 6 of 72 ©Retrotec Inc. 2012 DM-2 Digital Gauge Basics The DM-2 is Retrotec’s two channel digital micromanometer, or differential pressure gauge

Page 60 of 72 ©Retrotec Inc. 2012 Appendix B: Manually calculate Flow if required test pressure cannot be reached If you have a situation where you

Page 61 of 72 ©Retrotec Inc. 2012 Pressure achieved Cannot reach 50 factor Pressure achieved Cannot reach 50 factor 50 1.00 25 1.57 49 1.01 24 1.

Page 62 of 72 ©Retrotec Inc. 2012 Table 14: Factors for when a building pressure of 25 Pa cannot be reached (n value of 0.6) Pressure achieved Cann

Page 63 of 72 ©Retrotec Inc. 2012 Appendix C: Errors occur in estimated flow if gauge and actual “n” don’t match If a gauge has the extrapolation

Page 64 of 72 ©Retrotec Inc. 2012 45 -1.0% -0.5% 0.0% 0.5% 1.1% 1.6% 50 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 55 1.0% 0.5% 0.0% -0.5% -0.9% -1.4% 60 1.8% 0.

Page 65 of 72 ©Retrotec Inc. 2012 Appendix D: Adjust Flow values for temperature difference Temperature correction is only required when there is a

Page 66 of 72 ©Retrotec Inc. 2012 Table 18: Temperature correction factors for enclosure PRESSURIZATION 50 55 60 65 70 75 80 85 90-20 1.058 1.069

Page 67 of 72 ©Retrotec Inc. 2012 Appendix E: Tables to correct Flow if range selected did not match installed range If the range installed was dif

Page 68 of 72 ©Retrotec Inc. 2012 Watch this quick video on choosing the wrong range and how to recognize it: Video (image): http://www.youtube.com/

Page 69 of 72 ©Retrotec Inc. 2012 Appendix F: Setting up for a test with Alaska’s AkWarm software 1. Press [Setup] to enter the “Setup” menu 2. Pr

Page 7 of 72 ©Retrotec Inc. 2012 The Fan Speed Control output on the gauge cable uses RS-485 protocol. The Speed Control Cable can thus extend app

Page 70 of 72 ©Retrotec Inc. 2012 Glossary Term Definition Air Current Tester Neutrally buoyant smoke (manufactured by Retrotec Inc.) used to locate

Page 71 of 72 ©Retrotec Inc. 2012 Term Definition through a common hallway then the enclosure would be the volume that bounds all of the apartments

Page 72 of 72 ©Retrotec Inc. 2012 Term Definition room See “Enclosure”. room pressure The pressure difference created by the Door Fan between insid

Page 8 of 72 ©Retrotec Inc. 2012 Range Config Displays the Range configuration. The Range selected must match the Range that is in use on the fan.

Page 9 of 72 ©Retrotec Inc. 2012 the contacts are secure against both the positive and negative ends of each battery. 3. Replace the battery compar