Retrotec DM-2 Gauge - Manual (Page 3)

● Press [Jog/Hold] until “Hold” appears in top center
of display.
● Press [Jog/Hold] again to cancel “Hold”.
● Press [Jog/Hold] until “Jog” appears.
● The [ ▲ ] [ ▼ ] keys now adjust the speed just like a
TV remote. With [Set Speed] the % speed
changes. With [Set Pressure] the pressure changes.
“Jog” is only available when [Set Pressure] or
[Set Speed] have a value entered.
The display will be frozen with the current values.
Use “Jog” to activate arrow keys [ ▲ ] [ ▼ ]
then adjust target speed or pressure.
Use “Hold” to freeze results display and
hold fan speed.
The fan speed of all current Retrotec
fans can be controlled automatically by
the DM-2. Connect the fan to the
gauge with the Ethernet style Speed
Control Cable
● Press [Set Speed], input a desired percent speed
between 1-100. Press [Enter]. The fan will accelerate
and hold at the set speed.
● Press [Exit] to stop the fan and cancel the set speed.
● Press [Set Speed] [0] [Enter] to stop the fan,
without clearing the Baseline or Set Pressure.
The DM-2 can automatically control
the fan speed to reach a target pressure
on any current Retrotec fan.
● Press [Set Pressure], input a desired test pressure,
and press [Enter]. The fan will accelerate to reach
the set pressure.
● The DM-2 adjusts the fan speed to hold the set
pressure, even if the enclosure changes
(i.e. opening/closing windows/doors, air sealing).
● Press [Exit] to stop the fan and cancel the set pressure.
● If pressure is set to “0”, the DM-2 will adjust the
fan speed to bring the existing pressure to zero.
Warning: Do not use the “@ Pressure” functions when
Set Pressure is 0.
● If the gauge stops
responding, press [Reset]
for 2 seconds, then turn
the gauge back on.
● [@ Pressure] provides an estimate of the results
(e.g. Flow) at a target pressure, even if the exact
pressure has not been reached.
● If the fan is running in Set Speed mode, press
[@ Pressure] until “@50 Pa” (or the value set in the
Mode Setup sub-menu) appears. The results are
now displayed as if the pressure is 50 Pa.
● If the fan is running in Set Pressure mode, press
[@ Pressure] once to view the results at the target
pressure. If the Set Pressure is 35 Pa, then “@35 Pa”
is displayed. Press [@ Pressure] a second time and
“@50 Pa” (or the value set in the Mode Setup
sub-menu) appears.
● Press [@ Pressure] again to clear the @ value, and
view the results at the current pressure.
Step 10: The @ Pressure extrapolation
Step 11: Set fan speed using gauge
Step 12: Automatically control
to a pressure
QuickGuide DM-2
Step 14: System reset if gauge
locks up
Fig 1: Fan adjusted to
achieve exactly 50 Pa
Fig 3: @-mode enabled
to estimate flow @ 50 Pa
Fig 2: Fan adjusted to
achieve about 50 Pa
Step 13: Hold display and jog speed
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