Binder APT.line M Series, Руководство по эксплуатации

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M 01/2009 page 39/61
The unit is only active with the reset button (3b) pushed in.
When the safety device responds, the red alarm lamp (3a) illuminates, the reset button (3b) jumps out,
and the oven is switched off permanently.
Check the safety thermostat with every change of the set point value and readjust it if neces-
sary.
10.2 Temperature safety device class 3.1 (DIN 12880) (option)
The temperature safety device class 3.1 serves to protect the high performance temperature chamber, its
environment and the contents against forbidden temperature excesses.
Please also observe the regulations BGR 120 of the German professional association of the chemical
industry (formerly ZH 1/119 laboratory guidelines of the employers’ liability insurance association) (for
Germany).
Figure 10: Temperature safety device class 3.3
Function:
The temperature safety device is functionally and electrically independent of the temperature control sys-
tem and if an error occurs it assumes the regulatory function.
If you turn the control knob (3) to its end-stop (position 10), the safety device class 3.1 protects the appli-
ance. If you set it to a temperature a little above the set-point temperature, it protects the charging mate-
rial. If the safety device class 3.1 has taken over control, identifiable by the red alarm lamp (3a) lighting
up, proceed as follows:
•
Disconnect the unit from the power supply.
•
Have examined and rectified the cause of the fault by an expert.
•
Start up the unit again as described in chap. 5.
Adjustment:
To check the response temperature of the safety device class 3.1, switch on the chamber and set the
desired set point at the temperature controller.
The sections of the scale from 1 to 10 correspond to the temperature range from 63 °C up to 350 °C and
serve as a setting aid.
•
Turn the control knob (3) of the safety device using a coin to its end-stop
(position 10) (unit protection).
•
When the set point is reached, turn back the control knob (3) until its trip
point (turn it anti-clockwise).
•
The trip point is identifiable by the red alarm lamp (3a).
•
The optimum setting for the safety device is obtained by turning the control
knob clockwise by approximately one scale division, which leads to extin-
guish the red alarm lamp (3a).
Figure 11: Setting safety device class 3.1
Check the setting regularly and adjust it following changes of the set-point.
(3)
(3a)