Frequently Asked Questions - Gauges | Retrotec

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DM-2 (7)

Why does my gauge show two dashes “—“?

Answer

​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.

How do I know if I need to use the ADMIN shortcut in FanTestic?

Answer

Some computers need you to create the ADMIN shortcut to be able to communicate with DM-2 gauges. Only some computers have a problem letting FanTestic communicate with the DM-2, and there is a special procedure to give FanTestic permission to access the ports. You do not need it for DM32 gauges (if you have a problem with DM32 USB, use the Ethernet option).

Check that you have the DM2 USB Device Driver installed (look in Control Panel).

Run the DM2Checker from your start menu. (if this is not in your start menu, then you need to install the DM-2 USB device driver from the...

What are the manufacturer's recommendations for equipment calibration?

Answer

​Our manufacturer's recommendation for calibration is as follows:

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

When do I need to install a USB driver from the website?

Answer

​If you have a DM-2 and want to connect to it using software such as FanTestic or the Retrotec Data Logger, you need to install a USB Driver.

Check your Windows operating system version to determine if you need a 32 bit installer or a 64 bit installer, and download and install from the website.

If you have a DM32, you should use the WiFi or Wired Ethernet connection to the computer for controlling the gauge. The only time you need to connect the DM32 to the computer using the USB is when updating the gauge firmware using the DM32Configurator software . You can use the USB...

I updated FanTestic software and now it cannot not find my DM-2.

Answer

If you previously had to use the "ADMIN" shortcut to allow FanTestic to find your DM-2 then you need to make sure that the previous version of FanTestic and all shortcuts to it are removed from your computer. Check here to find out if you need to use the ADMIN shortcut.

Uninstall FanTestic completely from your computer using the Control Panel (choose the Remove from computer option, not the Revert to a previous version option if you are presented with a choice)....

My computer cannot connect to the DM-2. How do I fix this?

Answer
  1. Make sure you have the DM-2 USB driver for the operating system version that matches the one on your computer (32bit or 64bit) installed on your computer. You can see it listed in the Control Panel.
  2. Run the DM-2 Checker software that was installed with the USB driver. There will be a shortcut to it in your Start menu of programs: The DM2 Checker will open a window on your desktop, and continuously show the connection information about the DM-2 connected to your computer.
  3. Sometimes you will have to Right click on the DM2 Checker and “Run as Administrator” in order
  4. ...

Why does FanTestic not find my DM-2 gauge when I start an Auto Test?

Answer

Your computer is limiting access to the USB ports by programs. ​In order for FanTestic to access the USB ports on your computer, you may have to "Run as Administrator". You will need to follow the procedure outlined in the attached document, regardless of whether you have Administrator privileges on your computer.

This problem can be avoided if you have a DM32 by connecting the DM32 gauge using an Ethernet cable to connect the computer to the Network port on the gauge instead of using the USB cable.

Do I use an Ethernet router or a switch with my DM32 for multiple fan tests?

Answer

Routers and switches are different kinds of networking equipment, and are not interchangeable.

A switch will for the most part just pass the traffic through. Switches can be used for multiplexing so you can get multiple inputs onto one output. They can also be used as signal boosters so you can extend the length of your data connection.

A router will dynamically generate IP addresses for devices connected to it. The router will also multiplex and boost signal.

When networking, it is important to understand what piece of equipment is in charge of generating the IP...

Why does my gauge show two dashes “—“?

Answer

​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.

FanTestic could not recover the USB connection to my DM32 gauge. How do I fix this?

Answer

1. If using a USB connection, and FanTestic advises you to unplug and re-plug the USB, you must re-plug into a Different USB port.

2. If you are using USB connection from your computer to the gauge, we recommend that you try the Ethernet connection. Instructions for directly connecting the blue Ethernet cable from your computer to the gauge are provided on the last page of the DM32 QuickGuide. Follow the instructions for connecting to a switch using a "Static" connection. http://retrotec...

What are the manufacturer's recommendations for equipment calibration?

Answer

​Our manufacturer's recommendation for calibration is as follows:

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

My Retrotec Software does not detect my DM32/DM32 WiFi nor via USB connection.

Answer

​There can be a number of things that can cause this issue to occur.

  1. Check that the DM32 gauge is working properly. Power it on and make sure everything functions manually.
  2. Check that you have set the Network to the correct setting for your wiring (Network Status :Wired, Network Status: WiFi Create if you are using the DM32 hotspot, Network Status: WiFi Join if you are joining a different hotspot, Network:Disabled for use with USB)
  3. If you are using WiFi Join, make sure that your computer's WiFi is also using the same network that the DM32 WiFi has joined
  4. ...

When do I need to install a USB driver from the website?

Answer

​If you have a DM-2 and want to connect to it using software such as FanTestic or the Retrotec Data Logger, you need to install a USB Driver.

Check your Windows operating system version to determine if you need a 32 bit installer or a 64 bit installer, and download and install from the website.

If you have a DM32, you should use the WiFi or Wired Ethernet connection to the computer for controlling the gauge. The only time you need to connect the DM32 to the computer using the USB is when updating the gauge firmware using the DM32Configurator software . You can use the USB...

DM32 Wi-Fi does not stay connected to Android or iOS (Apple) device, and loses connection. What is the problem?

Answer

Consider the following:​

  1. Connection range lowers when the DM32 gauge is under low battery power. The voltage goes from 4.2V down to 3.3V and the signal strength output is slightly reduced. If you are having connection troubles and can only connect within a few feet, you should first check if the battery level is in the ‘red’; if so, charge the DM32.
  2. You may have an older version of GaugeRemote installed – make sure your Andriod or iOS device is updated to the latest. There have been improvements in the most recent versions to improve reconnection.
  3. Some
  4. ...

​What is an extrapolated result? (@ pressure)

Answer

​Q4 is a Flow result that is extrapolated to 4 Pa. For extrapolation of what the result would be at 4 Pa, a best-fit line on a graph (with a known slope ) is needed.

The slope value is different for different enclosures, since the slope is dependent on enclosure leakage. To generate a line on a graph, you will either need to:

  1. Measure multiple points of data to compute a slope ('n' value), or you
  2. Guess a slope ('n' value)

FanTestic performs #1, whereas your DM32 performs #2.

In other words, FanTestic software records multiple...

Do I use an Ethernet router or a switch with my DM32 for multiple fan tests?

Answer

Routers and switches are different kinds of networking equipment, and are not interchangeable.

A switch will for the most part just pass the traffic through. Switches can be used for multiplexing so you can get multiple inputs onto one output. They can also be used as signal boosters so you can extend the length of your data connection.

A router will dynamically generate IP addresses for devices connected to it. The router will also multiplex and boost signal.

When networking, it is important to understand what piece of equipment is in charge of generating the IP...

Why does my gauge show two dashes “—“?

Answer

​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.