Retrotec DucTester with DM-2 - Manual (Page 8)

Tubing Accessory Kit
35 ft (10 m) of blue, red, yellow and green 1/4 inch
(12mm) outside diameter tubing. Static Pressure
Probe, 4 inch (100 mm) x 1/8 inch (6 mm) outside
diameter metal probe, 2 T and 2 male-to-male con-
nectors. Red L for duct leakage to outdoors test.
Part #: TU119
Flow Hood
24 x 24 inches
(61 x 61 cm)
Part #: PP105
Page 8 of 8
Optional accessories
12.5ft (3.8m)
Flex Duct for
DucTester
Part #: DU161
Flange
to connect
Flex Duct to
register
Part #: DU157
Verification
Plate
Part #: DU159
Deluxe Cordura Toolbag with
Shoulder Strap
Part #: TL118
Grill Mask 12in x 216ft,
12in perfs,
Hi-stick White,
Single Roll
Part #: GR116
Part #: GR117 (for case of 3)
Umbilical for
DucTester
fans, 7ft (2 m)
Part #: DM240
Optional DU159 Verification
Plate shown.
□
Tape the optional flow
Verification Plate to the
Flange and attach the
red tube.
□
Attach the Flex Duct to the
exhaust side of the fan
to pressurize the Flex Duct.
□
Stretch the Flex Duct to
it’s full length.
□
Set the DM-2 to measure
“Flow” in “CFM @25 Pa”.
□
Adjust the speed until
“PrA” reads close to 25 Pa.
□
Read the Verification
Plate to determine the
acceptable range for flow.
Typically, 100 to 110 CFM
is a pass.
Check gauge operation and check for blocked, leaking or
pinched tubes weekly, and anytime results are in question.
To perform the gauge check, you will need the gauge
and Umbilical.
□
Press [Exit] [Time Average] until “4s” appears.
□
Press [Mode] repeatedly to display “PrB”.
□
Connect the yellow tube between the red and
yellow ports.
□
Repeat between different ports with each of the
tubes you use for testing.
Field check gauge weekly
If readings on “PrA” and “PrB” are within 2% and
don’t drop rapidly, the tube is not blocked or
leaking and the gauge is correct.
Checking your gauge
and tubes regularly will
eliminate a common
source of error in
readings.
Mid-Range Ring
& Low-Range
Ring
(Mid) Part #: DU154
(Low) Part #: DU155
Check the DucTester system monthly with a
known setup―if flow is outside the acceptable
range then system needs full calibration.
Field check system monthly