HD550-EU-EN V1.1 07/13
4
Operation
Basic Measurements
1. Press the
button
to turn power on.
2. Press the
°C/°F
button to change the units of measure from °C or °F.
3. The upper display will indicate Air Temperature, Wet Bulb Temperature or Dew Point
Temperature and % Relative Humidity, or Air Temperature and Grains Per Pound, or grams per
kilogram. Press the
UNITS
button to toggle between Air, WB or DP, and %RH, GPP or g/kg.
4. The lower display will indicate Type K temperature or IR Temperature. Press and hold the
IRT
button to select the IR Thermometer. The TYPE-K function will display “-------“ if a type k probe is
not inserted into the meter.
Non-contact IR Surface Temperature Measurements
The built-in IR sensor can remotely measure the temperature of most surfaces. The
Laser pointer allows the user to aim accurately when taking non-contact
measurements.
1. Turn ON the meter using the button.
2. The IR sensor and laser pointer are located at the top of the meter.
3. Point the sensor toward the surface to be measured.
4. Press and hold the
IRT
button to begin measuring the surface temperature of a
desired target.
IR TEMP
and
will appear on the display. The laser pointer will
switch on to help aim the meter.
5. The measured IR surface temperature will appear on the lower display.
6. When the IRT button is released, the laser pointer will switch off and the reading
will freeze (data hold) on the display for approximately 7 seconds.
7. After the 7 second hold time the meter returns to the type K mode.
WARNING: Do not directly view or direct the laser pointer at an eye.
Low power visible lasers
do not normally present a hazard, but may present some potential for hazard if viewed directly for
extended periods of time.
