In order to do both, you need to be sure you have version 5.8.30 of FanTestic or later. 

In all versions of FanTestic before version 5.8.30,  if you plugged a DM32 into a computer USB to give it power (instead of plugging into the wall adapter) FanTestic would assume you also wanted to use USB Serial connection for control.  FanTestic made this assumption even if the gauge was also connected to the computer over Ethernet (via the Network cable or via WiFi). 

In all versions starting with 5.8.30, FanTestic discovers gauges connected via Ethernet first, so it can ignore the same gauge also found on USB Serial. 

This change allows users to have their DM32 connected for control via Ethernet but also connect the DM32 to the computer USB port for power (if it is more convenient than connecting to a wall outlet).  Retrotec recommends that users use Ethernet connection rather than USB for controlling the DM32. 

*Max current is initial in-rush current. Generators used for Retrotec equipment should be inverter type generators, (i.e., suitable for use with sensitive electronics).

Retrotec recommends you take the maximum number of test points to decrease the uncertainty in your test.

Yes, you can change this default and take only 5 readings according to the Standard but your uncertainty will often be too high and you might have to retest.  Next, you might retest and find the result differs from the previous test by 10% or more making you lose confidence in the results. Retrotec defaults that include taking 10 test points and longer baselines will optimize your tests and give better results. 

You might save a few minutes by testing to the minimum allowed by the Standards but in the long run, your test results will be poor. Officials look at high uncertainties and poor repeatabilities between your tests and wrongly conclude your equipment is faulty but the truth is that your test method is faulty.  Please use our defaults as practical minimums and if anything take your tests over a longer time rather than shorter and your results will

Click the "Reset to Standard Default" button in the Advanced settings menu, to ensure default program parameters are used.

Our manufacturer's recommendation for calibration is as follows:

• Retrotec fans: Every 5 years.  
• DM-2 Manometer: Every 2 years  or if the Manometer fails a field check. 
• DM32 / DM32 WiFi Manometer: Every 5 years or if the Manometer fails a field check.

Please review the DM32 and DM-2 Manuals on how to perform a field check.  

This only covers our manufacturer recommendation.  The energy standards (EN13829, ASTM, ATTMA, USACE, etc...) that you are using for test results may have different calibration intervals.  Please consult the energy standards for the specific equipment calibration intervals.

Fan Pressure (flow pressure) is too low for the Range, which means you should change to a smaller more restrictive Range to increase fan pressure.
 

500 Flow Chart

6000 flowchart

I have a Energy or Enclosure Integrity Test to perform.  How many fans do I need to properly run the test?  Do I have enough fans to run the test?

We have created two tools to help you figure out how many fans you will need for your test. 

Download either the Blower Door or Enclosure Integrity version of the Number of Fans Calculator. 

Next, open the file in excel and "Enable Editing" when a security warning appears.

Fill in all the fields highlighted in blue.  The number of fan results are highlighted in green.

Here is what the Blower Door Number of Fans Calculator looks like:

And this