B) Target Laser; Backlight - VOLTCRAFT IR 900-30S Bedienungsanleitung

In order to determine the hottest spot of the test object, hold down the measuring button (7) and scan the test
object in a zigzag movement until you have found the hottest spot. In the secondary display (20), the device
displays minimum (MIN), maximum (MAX), and average temperature (AvG) as well as the temperature differ-
ence (DIF).
For accurate measuring results, the infrared thermometer must have adapted to ambient temperature. Always
allow the device to reach ambient temperature when it is taken to a new location.
Shiny surfaces result in false results. For compensation, shiny surfaces can be covered with adhesive tape or
matt black paint. The device is not able to take measurements through transparent surfaces such as glass. It
measures the surface temperature of the glass.
Lengthy measurements of high temperatures at a short distance will heat up the measuring device and con-
sequently result in faulty measurements. For accurate results, the following rule of thumb applies: The higher
the temperature, the higher the measuring distance and the shorter the measurement duration should be.
Ir measuring spot size - distance-to-spot ratio (D/S)
In order to obtain accurate measuring results, the test object must be larger than the measuring spot of the IR ther-
mometer. The measured temperature is the average temperature of the measured area. The smaller the test object,
the shorter the distance must be to the infrared thermometer. See the following diagram for the exact measuring
spot size. The diagram is also printed on the device. For exact results, the test object should be at least twice the
size of the measuring spot.

b) target laser

The target laser can be activated or deactivated. Press the measuring button (7) to switch on the measuring device.
Press the "LASER / BACKLIGHT" button (6). When the laser is active, the laser indicator (21) (triangle with a laser
beam symbol) is displayed. To deactivate the laser, press the "LASER / BACKLIGHT" button (6) until the laser indica-
tor (21) disappears.
c) Backlight
Press the "LASER / BACKLIGHT" button (6) to switch the backlight on or off when the measuring device is switched
on. Press the button until the backlight is on or off as desired.
24
D:S 30:1
Spot 10 mm
Distance 300 mm
50 mm 100 mm
1500 mm 3000 mm
Laser
InfraRed
16 mm