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CB / CB-UL, CBF / CBF-UL (E7) 07/2021 Page 177/197
24. Technical description
24.1 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 a constituent part of the BINDER QM DIN EN ISO 9001
systems. They are controlled and calibrated to a DKD-Standard at regular intervals.
A record of this calibration and adjustment is part of the BINDER test certificate of the chamber.
Adjustment in factory:
• Temperature: 37 °C / 98.6°F measured in the center of the usable volume
• CO
2
: 0 vol.-% CO
2
(100 vol.-% N
2
) and 5 vol.-% CO
2
(analyzed test gas directly exposed to the sensor
head)
• O
2
(chamber with O
2
control): 0 vol.-% O
2
(100 vol.-% N
2
, analyzed test gas directly exposed to the
sensor head) and 20.9 vol.-% O
2
(ambient air).
• Humidity (CBF / CBF-UL): 93 % r.h.
Repeated calibrations are recommended in periods of 12 months.
For temperature and humidity calibration and adjustment, BINDER service uses electronic measuring and
display devices traceable to an acknowledged standards/calibration institution (DKD or PTB for Germany)
with a valid calibration certificate.
Test gases with an analyzed concentration serve to calibrate the sensor systems for CO
2
and O
2
(chamber
with O
2
control). The sensor heads are exposed directly to the test gas.
24.2 Over current protection
The chamber is protected by a chamber-protection against over current, accessible from the outside. It 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 5mm x 20 mm (CB) or 6.3 x32 mm (CB-UL). Replace this fuse only with a substitute of the
same ratings. Refer to the technical data of the respective device type. If this fuse is blown, please inform
an electronic engineer or BINDER service.
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