5 Pass red tube through panel
Pass the red tube from the DM-2 through the panel
and toss the end away from the fan’s airstream.
Note
Water in the tube will result in erroneous readings.
6 Install fan
6.1
Hook the bottom of the fan inside the panel.
6.2
Align the notch on the upper rim of the fan with
the corresponding slot.
6.3
Gently push the fan into position and rotate it
slightly until the fan top is level with the floor.
6.4
Attach the fan safety strap.
7 Connect the fan
7.1
Connect the AC plug from the
wall to the variable speed
drive.
7.2
Connect the data cable from
the DM-2 to the drive.
7.3
The Power and Status lights
are steady green. A flashing green Status light
indicates no connection to the DM-2. A red
Status light indicates DM-2 control of the fan is
interrupted; reconnect, press
[Exit]
to clear.
7.4
Connect the yellow and green tube (3300SR
fans only) to the variable
speed drive and fan.
7.5
Connect the control
cable, twist it to lock,
to the fan top.
8 Zero gauge
Press
[Auto Zero]
. When
“on”
is displayed, the gauge will
zero itself every 8 seconds.
Tip
Normally,
[Auto Zero]
should be left “On”; turn off to save
battery power.
9 Set time averaging
9.1 Press
[Time Avg]
as needed, until
“PrA” varies by less than 1Pa.
9.2 Wait for twice the time average setting
before taking a reading.
Example:
Set
[Time Avg]
to “8s” then watch for 16 sec.
Tip
1s, 2s, 4s, 8s updates every 1 second(s),
10s, 20s, 1min, 2min updates every 10 seconds.
Tip
Use longer time averaging in windy conditions.
10 Measure bias pressure
10.1 Prior to each test, and with the fan covered,
press
[Baseline]
to begin averaging the bias
pressure.
10.2 Press
[Enter]
after about 60 seconds to
capture the “Baseline”.
10.3 After each test, press
[Exit]
to clear baseline.
Note
The value displayed under “Baseline” will be subtracted
from the pressure reading on Channel PrA.
11 Set fan model on DM-2
11.1 Press
[Device]
until “Retrotec 3000” is
displayed.
11.2 Select “Retrotec 3000SR” if a yellow and a
green tube are connected to the fan.
Tip
Disable the other devices using
[Setup]
to prevent the
incorrect flow curves from being accidentally accessed.
See:
QuickGuide-DM2MkII
12 Set Range Plates and configuration
12.1 Remove range plates to get a higher range of
flows, add plates for a lower range of flows.
12.2 Start with Range B by removing the C8 Plate.
12.3 Press
[Range Config]
until the DM-2 displays
Range Config “B”.
See:
QuickGuide-Fan-
RangeConfig-2000&3000
13 Choose results
13.1 Press
[Mode]
to cycle through the enabled
results.
13.2 Press
[Mode]
until “Flow” appears.
See:
QuickGuide-DM2MkII
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