9 Operation
9.1 Distance and precision
Fig. 1
To obtain accurate measurements, consider the following points when measuring:
The measured object must be larger than the IR measuring spot
S
(fig. 1).
The measured object should be at least twice the size of the IR measuring spot
S
(fig. 1).
The smaller the object, the closer it must be to the thermometer.
The D:S ratio is 6:1. At a distance
D
(fig. 1) of 6 cm, the size of the IR measuring spot is
1 cm.
9.2 Surface and environmental constraints
Not all surface materials are suitable for taking measurements. Observe the following con
-
straints:
Do not measure surface temperatures of shiny or polished metal surfaces.
Do not measure through transparent surfaces such as glass. It will measure the surface
temperature of the glass instead.
Steam, dust, and smoke can affect the accuracy.
9.3 Switching on/off
1.
Press the measuring button to switch the product on.
Æ
The display lights up.
Æ
The product turns off automatically after approx. 15 seconds of inactivity.
9.4 Enabling/disabling the target laser
The target laser helps you direct the infrared sensor at the desired location.
CAUTION
Eye injury from laserlight
Do not point the laser beam at people or animals.
1. Press the measuring button to switch on.
2.
Press the button
to enable/disable the target laser.
Æ
(If enabled) the symbol
is shown on the display.
Æ
(If enabled) the target laser is active while the measuring button is pressed.
9.5 Measuring temperature
Important:
Long measurements of high temperatures at close range cause the product to self-heat.
This results in inaccurate measurements.
The higher the temperature, the greater the measuring distance and the shorter the meas
-
uring duration should be.
1
Precondition
D
The product has adjusted to the ambient temperature. This can take up to 30 min.
2
Procedure
1.
To measure, press and hold the measuring button and point the infrared sensor at the
object.
Æ
The measured temperature and
SCAN
are shown on the display.
Æ
If the temperature lies outside the measuring range, the display shows
----
.
2. Release the measuring button to freeze the measurement.
Æ
The last measured value and
HOLD
appear on the display.
9.6 Measuring differential temperature
With the differential temperature function you measure the difference between the highest
and the lowest temperature reading relative to the temperature of a reference object. The first
measurement serves as the reference temperature.
Temperature
Measuring
location
Reference
temperature
Max
Min
Fig. 2
The graph shows how temperature can vary across measuring locations (or
measuring objects) in relation to the initially set reference temperature.
1. Press the measuring button to switch on.
2. Repeatedly press the button
MODE
until
DIF
is shown on the display.
3.
Point the infrared sensor at the object.
4.
Press and hold the measuring button to start taking measurements.
Æ
The display shows the current temperature and the temperature difference
ΔT
between
the highest and the lowest temperature reading (fig. 2).
9.7 Displaying Maximum/Minimum/Average readings
Besides temperature, the product records and calculates maximum, minimum, and average
temperature. You can set which reading is displayed when taking measurements.
1. Press the measuring button to switch on.
2. Repeatedly press the button
MODE
to select minimum (
MIN
), maximum (
MAX
), or average
(
AVG
) temperature.
9.8 Setting temperature alarms
The temperature alarm function allows you to set a lower and upper temperature threshold.
When measurements fall below the lower or exceed the upper threshold, an alarm sounds.
Thresholds can be enabled independently of each other.
1
Setting thresholds
1. Press and hold the button
MODE
until
ε=
flashes on the display.
2. Repeatedly press the button
MODE
until
(upper threshold) or
(lower threshold)
flashes on the display.
3.
Press the button ▲to activate the threshold.
Æ
The display switches from
Off
(deactivated) to
On
(activated).
4. Press the button
MODE
to confirm.
Æ
The temperature flashes on the display.
5.
Use the buttons ▲ and ▼to set the threshold temperature.
6. Continue pressing the button
MODE
until no symbols flash on the display.
Æ
The corresponding threshold symbol shows on the display.
Æ
You have set and activated the threshold.
2
Disabling thresholds
Refer to the procedure above for setting thresholds. Instead of activating them, you deactivate
them.
10
Configuration
Use the configuration menu to change and adjust display and measurement settings.
10.1 Available settings
Setting
Display indicator
Description
Temperature unit
°C/°F
Select between degrees Celsius or degrees
Fahrenheit.
Emissivity
ε=
Set the emissivity level.
Many organic materials have an emissivity of
0.95.
Refer to “Emissivity reference values” for
emissivity levels of different materials.
10.2 Adjusting settings
1. Press and hold the button
MODE
until
ε=
flashes on the display.
2. Repeatedly press the button
MODE
until the display indicator corresponding to the setting
you intend to change flashes on the display.
3.
Use the buttons ▲ and ▼to adjust the setting values.
4. Press the button
MODE
to save the changes.
5.
Exit the menu by pressing the button
MODE
repeatedly until no symbols flash on the dis
-
play.
Æ
You have changed the setting.
