Retrotec DM-2 User manual

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Retrotec DM-2 Series
2-Channel Digital Pressure
Gauge
Revolutionary New Airflow Diagnostics
DM-2
DM-2A
With Manual Speed Control
Features Automatic Speed and
Pressure Control
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.
The on the fly display 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.
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.
Automatic
Pressure
Control
The DM 2A offers onboard “Set and Forget” control
of house pressure and flow pressure. Save time
and effort by setting to 50Pa and let the DM 2A do
the rest. As you identify and seal leaks, the system
automatically adjusts the fan speed to hold the
desired house pressure.
Automatic Control requires a DM 2A and works with
all 2200, 3200 and DU220 Digital Fan Products.

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Retrotec DM-2 Series Digital Gauge
Specifications
Pressure Channels: 2 independent pressure channels (A & B)
Pressure Range: 1250 Pa to +1250 Pa ( 5 to +5 inches H
2
O)
Resolution: 0.01 Pa (0.0001 inches H
2
O, 0.001 lb/ft
2
)
ccuracy: 1% of pressure reading or 0.15 Pa (whichever is greater)
Weight: 14 oz (397 g)
Dimensions: 8.75” x 4.25” x 3” ( 22.2 x 10.8 x 7.6 cm)
LCD Display: 2.4” x 1.4” (6 x 3.6 cm)
Operating
Temperature Range:
32 to 130
o
F (0 to 53
o
C)
Display Backlight: press [On] to activate
Power: 4 NiMH rechargeable batteries and charger included
uto Off: 4 hours
Temperature: can be displayed with Retrotec’s temperature probe that will be available in 2007.
Calibration Meets: Canadian CGSB 149.1 2002 & SuperE, USA ASTM E 779 – 03, European EN 13829 & CEN, UK
TM 23 Energy Standards, Rain Penetration Standards. NFPA 2001 01, ISO 14520 and UBC
905 fire standards.
Supported Units of Measurement
Channel A: Pressure in Pascals, inches H
2
O, lb/ft
2
Channel B: Pressure in Pascals, inches H
2
O, lb/ft
2
Flow in cfm, l/s, m
3
/s, m
3
/h
Flow @ (any pressure) calculates flow at ANY desired pressure configured in Setup menu
Leakage rea EqLA (Canadian) and/or EfLA (US) in cm
2
, in
2
, ft
2
Leakage rea @ (any pressure) calculates ELA at ANY desired pressure configured in Setup menu
ir-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, m
3
/s, m
3
/h according to cross sectional area entered on keypad
DM-2 Functionalit (available with DM-2 and DM-2A)
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 vg: Advanced box car averaging displays continuous updates of the average pressure. No more
waiting for your next average pressure measurement! Dramatically reduces the affect of wind
and other pressure fluctuations.
uto Zero: On start up 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/ rea: Enter volume and/or area values to calculate air change and flow/unit area results.
Temperature: Displayed with Retrotec’s temperature probe (available 2007).
DM-2A Exclusive Functionalit (requires 2200, 3200, or DU220 series fans)
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.
DM-2 Standard
Equipment
• 25’ (3m) red tube
• 10’ (3m) clear tube
• Instruction manual
• 2 year warranty
DM-2A Standard
Equipment
• Integrated Control
Umbilical
• Instruction manual
• 2 year warranty
Connections on
back
Retrotec Energy Innovations Ltd.
Phone [phone]
Fax [phone]
[e-mail]
www.retrotec.com
Specifications subject to change without notice. Infiltrometer is a registered trademark of Retrotec.
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