BINDER KBF LQC 240 - Manual (Page 64)

KBF LQC (E5.3) 07/2014 page 64/114
11.3 Temperature safety device class 3.3 (DIN 12880) (option)
With the option over/under temperature protective device (temperature safety device class 3.3 acc. to
DIN 12880) the unit is equipped with two additional safety devices (class 3.1 and class 3.2). The combi-
nation of the safety devices is regarded as a safety device class 3.3.
The temperature safety device, class 3.3, serves to protect the constant climate chamber, its environment
and the contents against forbidden temperature excesses. Please observe the guideline BGI/GUV-I 850-
0 on safe working in laboratories (formerly BGR/GUV-R 120 or ZH 1/119 laboratory guidelines issued by
the employers’ liability insurance association) (for Germany).
With
safety device class 3.1 a maximum value for the temperature is set that the unit will not exceed
due to the regulatory function of the safety device class 3.1. This protection against excessively high
temperatures can, for example, serve to protect the constant climate chamber, its environment and the
material under treatment from excess temperatures.
With
safety device class 3.2 a minimum value for the temperature is set that the unit will not fall below
due to the regulatory function of the safety device class 3.2. This protection against excessively low tem-
peratures can, for example, serve to protect sensitive loads from undercooling.
Both safety devices are functionally and electrically independent of the temperature control system. If an
error occurs, they perform regulatory function.
Safety devices class 3.1 (14) and class 3.2 (15) are located in the left lateral control panel.
With option temperature safety device class 3.3, the safety controller (chap. 11.2) must be set
to limit 100 °C / 212°F.
(15)
(14)
Excess
temperature
Set-point
Insufficient
temperature
W X
CONFIG HAND VIEW->
EXIT
W
08:43:55 20.09.02
TEMP °C 40.0 36.8
HUMID %rH 65.0 58.6
(1)
Figure 19: Temperature safety device class 3.3