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VDL (E3.1) 10/2020 Page 91/196
In the locked view the controller provides all display functions. No setting functions are available.
The setpoints are shaded (light grey) in normal display. Changing them by direct entry in the fixed value
operating mode is not possible. The functional icons for setpoint entry and program start in the footer are
without function.
After turning on the unit, user log-in is required to operate the controller (chap. 12.2).
Operation without user log-in / without password-protection
If the password function has been deactivated, after turning on the unit without user log-in there are those
controller functions available, which correspond to the highest authorization level without a password pro-
tection. There is no lock icon in the header.
9.7 Loading
Without technical ventilation the chamber must not be loaded with material containing sol-
vents.
The chamber cannot be loaded when turned off / in standby mode .
Before loading the material to be loaded, note:
When loading the chamber also in the context of intended use, an explosive mixture may form in the working
space. Therefore, a safety area of at least. 1 m in front of the oven must be considered.
• Ensure equipotential bonding. The accessible installation and operating surface of the equipment must
be conductive. This installation and operating surface must be connected with the vacuum drying oven
according to the grounding plan (Chap. 6.8).
• The personal protective equipment (PPE) of the operating personnel must be implemented ESD pro-
tected. This applies also to gloves.
• Activate the technical ventilation (extraction):
The operator shall provide active ventilation (technical ventilation according to country-specific regula-
tions (TRBS 2152 Part 2 for Germany) prior to commissioning of the chamber. It must include the entire
installation area of the vacuum drying oven. Loading must take place under technical ventilation in the
safety area in front of the oven.
• Introduce only those solvents for which the auto-ignition temperature and the maximum drying temper-
ature (safety temperature) have been determined and setting on the safety controller has been per-
formed.
Acc. to IEC 60079-0, only substances with an auto-ignition temperature above 200 °C / 392 °F may be
introduced into the chamber. This chamber is NOT suitable for drying substances with an auto-igni-
tion temperature below 200 °C.
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