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FP (E1.1) 03/2019 page 72/90
19. Technical description
19.1 Factory calibration and adjustment
This chamber was calibrated and adjusted in 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.
19.2 Over current protection
Single-phase devices are protected by a miniature fuse against over current, accessible from the
outside. The miniature fuse is located at the rear of the chamber below the strain relief of the power cord.
The fuse holder is equipped with a fuse clip 5 mm x 20 mm (cUL-Version 6.3 mm x 32 mm). The fuse
may be replaced only with a substitute of the same ratings. Refer to the technical data of the respective
device type.
Three-phase devices are equipped with internal fuses not accessible from outside. If these fuses are
blown, please inform an electronic engineer or BINDER service.
19.3 Definition of usable space
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 separation
a = 0.1*A
b = 0.1*B
c = 0.1*C
V
USE
= (A - 2 * a) * (B - 2 * b) * (C - 2 * c)
Figure 14: Determination of the usable volume
The technical data refers to the so defined usable space.
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 and humidity.
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