Operating Instructions
Measuring Pressure
1. Press the power button to turn the meter on. Press the P/V/F
button to enter Pressure Measurement mode. Press the Down
button to select the unit of measurement.
2. Connect a single hose to the Input Port, leaving the Ref Port empty.
3. To ensure accuracy, zero out the unit before taking a measurement.
With the input hose open to ambient conditions, press and hold the
Hold/Zero button until the display states “0”.
4. Place the input hose in the desired measurement location. Be sure
to place the meter away from the measurement location or
readings will not be accurate.
5. The meter will display the differential pressure of the input zone
with respect to the reference zone. For example, a positive reading
means that the input zone is positively pressured in respect to the
meter location or its reference zone.
Measuring Velocity
1. Press the power button to turn the meter on. Press the P/V/F
button twice to enter Velocity Measurement mode. Press the Down
button to select the unit of measurement.
2. Connect the white hose to the Input Port on the meter and the total
pressure connection on the pitot tube. Connect the black hose to
the Ref Port on the meter and the static pressure connection on the
pitot tube.
3. To ensure accuracy, zero out the unit before taking a measurement.
With the Input and Ref hoses open to ambient conditions, press
and hold the Hold/Zero button until the display states “0”.
4. To take a measurement, face the pitot tube tip against the
measured area. Ensure that the axis of the duct is aligned with the
ow at ±10°. If the readings come out negative and “Error” appears
on the display, check that the hoses are attached to the correct
ports on the meter and the pitot tube.
REED Instruments
