Tip: Leaving the backlight on discharges the battery at
a faster rate.
1s, 2s, 4s, 8s: Display updates every 1 second.
10s, 20s, 1min, 2min: Display updates every 10 seconds.
Tip:
Auto Zero can be turned off to conserve batteries
when not taking readings.
Tip: By default, Flow, Air Changes, and EqLA are
enabled. All other results can be enabled manually
from the Setup Menu. See Page 4.
Tip: From the factory, the Retrotec DU200, Retrotec
1000, Retrotec 2000 and Retrotec 3000SR are enabled.
All other Devices are disabled. See Page 4 to add or
remove Devices to save time and reduce errors.
Tip: Disable the other Flow Ranges using [Setup] to
save time and reduce errors.
● Press [Baseline] to begin
sampling and press [Enter]
after 15 to 60 seconds.
● The displayed Baseline pressure is subtracted
from all future readings.
● Pressing [Exit] at any time will clear the Baseline.
● Press [On/Off] to turn the DM-2 On.
● Press and hold [On/Off] to turn the
DM-2 Off.
● When gauge is on press [On/Off] to
turn the backlight on/off.
● Press [Exit] to:
● Clear the splash screen.
● Stop the fan and cancel Set Speed or
Set Pressure mode.
● Clear and cancel the set Baseline.
● Move back or exit the Setup menus.
● Cancel Volume and Area inputs.
● Cancel other data entry.
● Press [Enter] to acknowledge inputs
and allow data entry:
● Change volume in Air Chg mode.
● Change area in Flow/Area and
Leakage/Area modes.
● Accept indicated Baseline pressure.
● Accept input fan speed or pressure.
● Press [Mode] repeatedly to scroll
through the enabled results.
● The DM-2 supports on-the-y
calculation of all currently used
results worldwide, including Flow, Air
Changes, Leakage Areas, Normalized Leakage Area,
Specic Leakage, Permeability and many others.
Results are averaged over the selected
time period
● Time averaging should always be On.
● Press [Time Avg] to scroll through the possible
time periods.
When AutoZero is active, the gauge
automatically zeros itself every 8
seconds, even while making
measurements.
● Press [Auto Zero] until “On” appears.
● AutoZero must be left on under normal operation.
Remove bias/offset/background/Baseline
pressures due to wind or stack that
are present before test pressures
are applied.
Step 3: Enter
Step 6: Select the Mode
Step 1: On/Off/Backlight
Step 7: Explore Time Averaging
Step 8: Discover AutoZero
QuickGuide DM-2
The DM-2 calculates ows for all
Retrotec, TEC and Inltec fans.
Choosing the right fan or ow device
is required to get correct results.
● Press [Device] to scroll through the enabled fans.
Step 4: Select Device
Step 9: Learn about Baseline mode
Step 5: Select fan Range
● Press [Range Cong] to scroll through
the enabled Flow Ranges for the
currently selected device.
Warning: Selecting the incorrect range will yield
incorrect results.
Step 2: Exit
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