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KBF-S / KBF-S-UL (E6) 02/2019 page 58/91
Press the OK button to enable the settings.
Configuring the self-test function
The current setting flashes. To deactivate the self-test function, select
the setting “0” with the Arrow buttons.
Confirm the setting with the OK button.
Self-test
Press the Back button several times to go back to Normal display.
18. Humidification / dehumidification system
The chamber is equipped with a capacitive humidity sensor. This results in a control accuracy of up to +/-
3 % r.h. of the set point. The temperature-humidity diagrams (Figure 19) show the possible working rang-
es for humidity.
You can turn humidity control (humidification and dehumidification) on or off with the function “Humidity
off” (chap. 8).
With humidity control turned off, the humidification module cools down. After activation it will take up to 10
minutes until the humidification function is fully available again. This setting is required when operating the
chamber without a water connection in order to avoid humidity alarms.
The preset temperature and humidity values should be situated within the optimum range
(hatched range in Figure 19).Only within this area will the chamber not be exposed to excessive
moisture due to condensation.
In the short-term set points outside the optimum range can also be targeted. The control accu-
racies of +/- 3 % r.h., however, cannot be guaranteed in this case.
0
10
20
30
40
50
60
70
80
90
100
10
20
30
40
50
60
70
80
90
100
% r.F.
°C
A
B
Figure 19: Temperature-humidity diagram
Range A: Control range of temperature and relative humidity, condensation free range
Range B: Discontinuous range (no continuous operation, up to 24 h)
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