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B / E 07/2017 page 25/39
9. Technical description
9.1 Factory calibration and adjustment
This chamber was calibrated and adjusted in the factory. Calibration and adjustment were performed
using standardized test instructions, according to the QM DIN EN ISO 9001 system applied by BINDER
(certified since December 1996 by TÜV CERT). All test equipment used is subject to the administration of
measurement and test equipment that is also constituent part of the BINDER QM DIN EN ISO 9001
systems. They are controlled and calibrated to a DKD-Standard at regular intervals.
9.2 Definition of usable volume
The usable volume illustrated below is calculated as follows:
c
c
b
a
C
B
A
b
a
A, B, C = Internal dimensions (W, H, D)
a, b, c = Wall clearances
a = 0.1 x A
b = 0.1x B
c = 0.1 x C
VUSE = (A - 2a) x (B - 2b) x (C - 2c)
Figure 8: Determination of the useable volume
Technical data refers to the so defined usable volume.
Do NOT place samples outside this usable volume.
Do NOT load this volume by more than half to enable sufficient airflow inside the chamber.
Do NOT divide the usable volume into separate parts with large area samples.
Do NOT place samples too close to each other in order to permit circulation between them
and thus obtain a homogenous distribution of temperature.
E 28: At working temperatures below approx. 70 °C / 158 °F and very low charge, temperature
variations due to physical reasons can occur. In order to reduce them we recommend
charging the oven with at least 20% of the usable volume.
9.3 Over current protection
The chambers are protected by a miniature fuse against over current, accessible from the outside. The
miniature fuse is located on the right side of the chamber below the strain relief of the power cord. The
fuse holder is equipped with a fuse clip 5mm x 20 mm. A fuse may be replaced only with a substitute of
the same ratings. Refer to the technical data of the respective device type.
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