3 HD350-en-GB_V3.4 2/19
Meter Description
1. Pitot tube. Hold the tube in the flow of air to take a reading
2. Pressure Manometer hose 1 Black
3. Pressure Manometer hose 2- White
4. Pressure Connector (+)
5. Pressure Connector (-)
6. Temperature sensor
7. LED display shows readings, units,
setup
parameters, and user alerts
8. PC interface jack: Use the supplied
cable to connect the meter to a PC
9. Upper Keypad:
F/C : Press to change the unit of
measure for Temperature. Also
functions as an up arrow key
UNIT : Press to change the unit of
measure for Pressure, Air Velocity, and
Air Volume (Flow). Also functions as a down
arrow
AVG / REC: Used to obtain the
Average for multi-point measurements in
either FLOW or VELOCITY modes. Up to
twenty (20) points can be averaged.
Press and hold this button for 3
seconds to access the data Recall mode (REC)
SETUP : Momentary key presses turn the backlight on and off. Press and hold this button for 3
seconds to enter or exit the Setup mode (discussed later in this guide)
10. Lower Keypad:
MAX/MIN: Press to record and store the highest, lowest and continuous moving average readings
for single point measurements. Press and hold this button to exit this function
SAVE / CLEAR: Press to store a reading. In recall mode, pressing this button clears a data
sample.
P/V/F: Press to select Pressure (P), Air Velocity (V), or Air Flow (F)
HOLD / ZERO: Momentary presses freeze and un-freeze the displayed reading. Press and hold
the button to ZERO (OFFSET) the displayed reading
Note: the meter does not operate in the horizontal position. Keep it either in the vertical or
near vertical position and make your Zero offset at the same vertical position as you make
your measurements.
11. On/Off button : Press to turn the meter ON or OFF
KEYPAD NOTE: In Setup mode several buttons have special uses not detailed above but are
described in subsequent sections of the manual.
NOTE: Battery Compartment, Tilt Stand, and Tripod Mount are located on the reverse side of the
meter.
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