VOLTCRAFT R 900-30S Bedienungsanleitung Seite 24

If all memory positions are used, you can overwrite any memory position as desired.
To delete all memory positions, hold down the measuring button (7) in LOG mode and
select memory position "0" using the "UP" button (2) or the "DOWN" button (8). Hold
down the "LASER/BACKLIGHT" button (6) until you hear a short beep. Now all
memory positions are deleted.
Setting the emissivity (EMS):
IR 900-30S allows you to set the emissivity. This allows you to obtain more accurate results with different
materials and surfaces (also see "Operating principle").
Manually setting the emissivity:
In the settings menu, press the "MODE" button (3) until the function indicator (19) reads "EMS". Use the
"UP" button (2) and the "DOWN" button (8) to adjust the emissivity to the test object between 0.10 and
1.00.
See the table following the specifications in these operating instruction for common
materials and the corresponding emissivity. Many organic materials have an emissivity
of 0.95. Therefore, the factory setting is an emissivity of 0.95.
Automatically setting the emissivity:
IR 900-30S can automatically set the emissivity.
Insert a type K temperature sensor into the socket (4). Any standard type K temperature sensor with a mini
plug can be used. For accurate measurements,we recommend using a special type K surface temperature
sensor (optionally available). Hold down the measuring button (7) and the "LASER/BACKLIGHT" button (6)
simultaneously until the function indicator (19) reads "EMS" (flashing). Contact the surface to be measured
with the type K temperature sensor and - at the same time - measure the temperature of the same area
using the IR measuring unit. Wait until both temperature readings have stabilised and then press the "UP"
button (2) to confirm. The calculated emissivity of the surface is displayed (17). If the display reads "ERR"
(error), the type K value is smaller than the IR value. In such a case, repeat the procedure.
The provided wire probe is not suitable for measuring surfaces as the contact area with
the test object is too small.
The higher the surface temperature compared to the ambient temperature, the more
accurate the emissivity of the surface can be determined (> 100 °C).
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