DM-2 Digital Gauge Set with Automatic Control (DM-2A)
DM-2, dual-channel, digital gauge puts the operator in command of virtually every parameter of interest to the door-fan tester. The DM-2 represents a huge advance in building and envelope diagnostic instrumentation. It's capable of displaying pressure on two channels, calculating airflow, leakage area, and air-changes. The DM-2 can also present the results in a number of different units that meet the professional standards of many different countries.
Supported Units of Measurement
Channel A: Pressure in Pascals, inches H2O, lb/ft2
Channel B: Pressure in Pascals, inches H2O, lb/ft2
- Flow in cfm, l/s, m3/s, m3/h
- Flow @ (any pressure) calculates flow at ANY desired pressure configured in Setup menu
- Leakage Area - EqLA (Canadian) and/or EfLA (US) in cm2, in2, ft2
- Leakage Area @ (any pressure) calculates ELA at ANY desired pressure configured in Setup menu
- Air-changes per hour according to volume entered on keypad
- Velocity in m/s, km/h, ft/s, ft/min, mph
- Velocity-Flow in cfm, l/s, m3/s, m3/h according to a cross-sectional area entered on the keypad
Range/Config: Cycles through flow ranges of the blower door or duct tester being used.
Setup: Permits changing default units, displayed outputs, devices, and reference pressures
Baseline: Measures and removes background pressures on Channel A for subsequent testing.
Time Avg: Advanced box-car averaging displays continuous updates of the average pressure. No more waiting for your next average pressure measurement! Dramatically reduces the effect of wind and other pressure fluctuations.
Auto Zero: On startup and every 8 seconds on both channels. May be turned off.
Device: Selects the flow characteristics of virtually any blower door, Duc-tester or a pilot tube. Turns on/off extrapolation to configured pressures
Volume/Area: Enter volume and/or area values to calculate air-change and flow/unit area results.
Simultaneous Pressure and Flow
Displayed on the fly or extrapolated to your desired test pressure. No need to achieve an exact speed to get perfect results.
Air-changes without a laptop!
Input the volume of your building and adjust the fan to your desired test pressure. Can't reach your test pressure no problem Use @-Pressure to extrapolate to 50Pa, 25Pa, or any other pressure.
Advanced Calculation of Normalized Airflow and Leakage Areas
Permeability and Specific Leakage Rates (as per EN13829 and TM23) can also be displayed in real-time, by simply entering either the floor or envelope areas.
DM-2A Exclusive Functionality
The following DM-2 exclusive functions are compatible with Retrotec's 2200, 3200, 3300 or DU220 series fans only.
Set Speed: Allows direct control of Fan speed from the DM-2 - no need to handheld speed control.
Set Flow: Closed-loop PID control of Fan Flow Pressure - great for windy conditions.
Set Pressure: Permits set and forget control of your fan. Dial in Set 50Pa and the fan will ramp up and hold 50Pa giving on the fly flow, ACH or leakage measurements. As you identify and seal leaks, the fan will automatically adjust itself for the tighter enclosure.
The USB Uplink allows the DM-2 Series Gauge to be connected to a computer for Data Acquisition, Automatic Control or remote data monitoring. Ask us about our software development kit for Excel or Visual Basic.
Installing on Windows VISTA
- Download the installation program to a known location (we recommend you create a folder My Documents/Retrotec and save it there, along with your software license).
- Right-click on the installation program and select Run As Administrator.
- Acknowledge all of the prompts.
- DO NOT launch Door Fan 3.0 from the installation program - if it launches, shut it down.
- Right-Click on the desktop shortcut icon and choose Properties.
- On the resulting Door Fan 3.0 Properties window, select the Shortcut tab.
- Click the [Advanced] button.
- Select (check) the option to Run as Administrator.
- Click Ok on all windows to close out the Properties window.
- Door Fan 3.0 should now run correctly on Vista.
Upgrading to the Latest version of Door Fan 3.0
- To upgrade your Door Fan 3.0 installation to the most recent version:
- Print a hard-copy backup of your previous test results.
- Download and run the latest version of Door Fan 3.0.
- Door Fan 3.0 has now been upgraded.
Note: If Door Fan 3.0 does not function as expected, proceed to the next section to perform a clean upgrade.
To perform a clean upgrade for Door Fan 3.0:
CAUTION! this will destroy all previous test data!
- Print a hard-copy backup of your previous test results.
- Click on Start->All Programs->Retrotec Programs->Door Fan 3.0 and then click on Uninstall Door Fan 3.0.
- Click Yes when asked if you want to delete the Door Fan 3.0 folder and database.
- Download and install the latest version of Door Fan 3.0.
- Door Fan 3.0 has now been upgraded.
Please note that while Retrotec endeavors to maintain backwards compatibility with future releases of Door Fan 3.0, we can not guarantee you will be able to successfully upgrade to newer versions without data loss. As such, we recommend printing a hardcopy of all previous tests for archiving purposes.