407412 Datasheet, PDF (5/8 Pages) Extech Instruments Corporation. – Hygro Thermo-Anemometer

Anemometer and Temperature Operation
1. Insert the Vane sensor into the meter's input jack at the top of the meter.
2. Press the POWER button to turn the instrument on.
3. Select Anemometer (Air Velocity) operation by placing the function slider switch to the
vane icon .
4. Select the temperature units by pressing the °C/°F button. The LCD display will
indicate '°C' or '°F' as selected.
5. Select the air velocity unit of measure by pressing the
UNIT button. With each press the display scrolls
through the units (m/s, km/hr, ft/min, knots, & mile/h).
6. For maximum accuracy, the yellow dot must be on the
exhaust side of the vane as shown.
7. The meter’s LCD will indicate Air Velocity +
Temperature.
Yellow
Dot
airflow
Relative Humidity and Temperature Operation
1. Insert the Relative Humidity probe in the input jack at the top of the meter.
2. Press the POWER button to turn on the instrument.
3. Select the Humidity mode of operation by placing the function slider switch to the
RH% position.
4. Select the temperature units by pressing the °C/°F button. The LCD display will
indicate '°C' or '°F' as selected.
5. Hold the probe by the handle in the area to be monitored. The meter will display
Relative Humidity + Temperature.
6. Note that humidity measurements take several minutes to stabilize.
Data Hold
Press the DATA HOLD button to freeze the displayed reading. The DH icon will appear on
the LCD while Data Hold is engaged. Press the DATA HOLD button again to resume
normal operation.
Min/Max Record Mode
When selected, the Record mode stores the highest (Max) and lowest (Min) readings for
later recall. To use Record mode:
1. Press the RECORD button. The REC indicator will appear on the LCD display.
2. Start a measurement session.
3. After the measurement session, press the RECALL button to view the highest (Max)
reading recorded since the RECORD button was pressed. The MAX indicator will
appear to inform the user that the displayed reading is the highest value recorded.
4. Press the RECALL button again to view the lowest reading encountered since the
RECORD key was pressed (the MIN indicator will appear on the LCD to inform the
user that the reading displayed is the lowest value recorded).
5. Press RECORD again to return the meter to normal operation. All stored data will be
cleared and the REC/MIN/MAX icons will disappear from the LCD.
6. Note that putting the meter into the Record mode defeats the Auto Power Off feature.
5
Model 407412 Version 2.1 July 2006