Binder APT.line M Series, Operating Manual

Page: 38 / 61

M 01/2009 page 38/61
10. Temperature safety devices
10.1 Temperature safety device class 2.0 (DIN 12880)
The safety device protects the high performance temperature chamber, its environment and the charging
material against impermissible excess temperatures.
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).
In the event of a fault in the temperature controller, the safety device (3)
permanently
switches off the
chamber. This status is reported visually by the indicator lamp (3a).
Check the operation of the safety device (3) by moving it slowly anti-clockwise until it is switched off. The
safety device cut-off is reported visually by the indicator lamp (3a).
Then release again the safety device by hitting the reset button (3b), and switch on the chamber as de-
scribed.
Figure 9: Temperature safety device class 2
Function:
The safety device is functionally and electrically independent of the temperature control device and
switches off the chamber permanently.
If you turn the control knob (3) to its end-stop (position 10), the safety device protects the appliance. If
you set it to a temperature a little above the set-point temperature, it protects the charging material.
If the safety device has switched off the oven, identifiable by the red alarm lamp (3a) lighting up, proceed
as follows:
•
Disconnect the chamber from the power supply.
•
Have examined and rectified the cause of the fault by an expert.
•
Release the safety device by pressing reset button (3b).
•
Start up the chamber again as described in chap. 5.
Adjustment:
To check the response temperature of the safety device, switch on the chamber and set the desired set
point at the temperature controller.
The scale division from 1 to 10 corresponds to the temperature range from 30 °C up to 320 °C and
serves as a setting aid.
•
Turn the control knob (3) of the safety device using a coin to its end-stop (position 10) (unit protec-
tion).
•
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) lighting up; the reset button (3b) jumps out .
•
The optimum setting for the safety device is obtained by turning the control knob clockwise by approx.
one graduation mark on the scale.
•
Push the reset button (3b) in again.
(3)
(3a)
(3b)