Retrotec DM-2 Gauge - Manual (Page 2)

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-fly
calculation of all currently used
results worldwide, including Flow, Air
Changes, Leakage Areas, Normalized Leakage Area,
Specific 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 flows for all
Retrotec, TEC and Infiltec fans.
Choosing the right fan or flow 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 Config] 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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