Operation manual
Technical changes reserved
Infrared-thermometer IR 8895
0141 0316-190 30.11.2021
2.4
Intended applications
!
The intended applications cover contact less measurement of temperature from -40 °C to +816 °C. For power supply, only two 1.5 V bat-
teries of type Mignon AA, IEC LR6 or equivalent are to be used. The operation is allowed only under dry environment conditions, contact
with moisture should be essentially avoided. A measurement under unfavourable environment conditions is not allowed. Unfavourable
environment conditions are: Dust and combustible gases, steam or solvents, thunderstorms as well as thunderstorm conditions like strong
electrostatic fields etc.
Any other application, as described before, can lead to damage of this product. In addition, dangers like short-circuit, fire, etc. are also
involved. The product should not be opened, modified or re-engineered!
3
Steps to eliminate measuring errors
Please take care of the following instructions while using the instrument:
•
Avoid using the device in the vicinity of electrical welding sets, induction heaters, transmission equipment, frequency converters, and
other strong electromagnetic fields.
•
After any abrupt change in temperature, the device should be left out for 15 minutes before using so that it can stabilise itself to the
new environment temperature.
•
Do not expose the equipment to high temperatures for a long time.
•
Avoid dusty and humid environment conditions. After usage, store the device in the storage bag to avoid contamination of the lens.
Consider technical facts of the measuring procedure to obtain exact results of measurement, particularly the relationship of measuring
spot size with respect to distance and the information for adjustment of emission value.
4
Working principle
Every body and liquid above the temperature of absolute zero degree Kelvin (-273.15 °C) emits infrared radiations from its surface. The
emitted energy has a fixed mathematical relationship with the surface temperature. This energy is measured by our infrared thermometer,
electronically processed and shown as temperature value on the display.
4.1
Measuring spot size
In order to achieve exact results from measurements, the measuring object must be bigger than the measuring spot of the infrared ther-
mometer. The measured temperature is the average temperature of the object surface. Smaller the object, shorter should be its distance
from the thermometer.
The exact measuring spot size can be decided from the diagram shown below. This diagram is also shown on the side of the device.
5
Setting-up and operation
5.1
Control elements
B+B Thermo-Technik GmbH | Heinrich-Hertz-Straße 4 | D-78166 Donaueschingen
Fon +49 771 83160 | Fax +49 771 8316-50 | [email protected] | bb-sensors.com
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