Overview continued
The pressure reading taken from the Exhaust Fan Flow Meter is easily converted to air flow in CFM using a flow table
attached to the side of the metering box. The DG-1000 and DG-700 digital pressure and flow gauges can also be set up to
display air flow readings directly in CFM.
The Exhaust Fan Flow Meter has three calibrated openings to provide an accurate measurement over the full range of the
device. A short handle is provided which can be attached to the metering box using Velcro strips. The handle is designed
to allow a standard painter’s pole or broom handle (not included) to be screwed into the open end of the handle to provide
access to exhaust fan grilles mounted high on walls, or on ceilings.
Connect tubing to the metering box
Connect one end of tubing to the pressure tap on the metering box (tubing is included with the
TEC pressure and flow gauge kit).
Connect tubing to the gauge
Connect the other end of the tubing to the T connector that is included with the TEC pressure
and flow gauge kit. Connect the two ends of the shorter tubing that is connected to the T
connector to the Channel A and Channel B input taps on the TEC gauge.
Set the door position on the metering box
The metering box comes with an adjustable opening which provides three ranges of
fan flow measurement.
The door position is determined by the position of the snap pin located on the top of
the metering box. The door position can be adjusted by pushing down on the snap
pin and sliding the door until the snap pin is in a new position hole.
Door Position Flow Range in CFM
E1
44 - 124
E2
21 - 59
E3
10 - 28
Attach the handle to the metering box
A short yellow handle is provided which can be attached to
the top of the metering box using the velcro strips. In addition,
a standard painters pole can be screwed into the end of the
yellow handle to make it easier to reach fan grills that are high
up on walls or on ceilings.
Snap pin
Snap pin position holes
