Meter Description; Temperature Sensor - Extech Instruments HD350 User Manual

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
11. On/Off button
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.
netzerotools.com
: Press to turn the meter ON or OFF
netzerotools.com
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HD350-EU-EN V3.1 07/13