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VDL (E3.1) 10/2020 Page 36/196
3. Description of the equipment
Vacuum drying is used for special drying problems, for which conventional drying methods cannot offer a
solution due to physical limitations.
The VDL vacuum drying oven is approved for drying materials with organic solvents.
Ex classification
The chamber is equipped with an explosion proof inner chamber and additional measures for explosion
protection.
The Ex classification of the vacuum drying oven VDL (assembly) acc. to ATEX Directive 2014/34/EU is
II 2/3/- G IIB T3 Gb/Gc/- X
The description of explosion protection on the type plate determines the chamber’s classification.
Detailed information on the Ex classification of the assembly and the individual devices can be found in
chap. 1.8.
The maximum possible surface temperature of the chamber interior is 160 °C / 320 °F.
Installation
The VDL vacuum drying oven may be installed in areas in which explosive atmospheres may occur on a
rare and temporary basis. The entire chamber with the exception of the power plug is classified in category
3 in relation to the environment. The chamber plug (power plug) is unprotected, therefore the electrical
connection must be established outside a zone. With optional analog output: The plug connection of the
analog output is unprotected and must therefore be established outside a zone.
Temperature class
The temperature class of the inner chamber acc. to EN 60079-0 is T3. The temperature class of the entire
chamber equals the temperature class of the inner chamber.
Controller
The chambers are equipped with a multifunctional microprocessor display controller with 2-channel tech-
nology for temperature and pressure. Temperature is indicated accurate to one-tenth of a degree, the pres-
sure inside the chamber accurate to one 1 mbar. Pressure is measured by a firmly installed pressure sen-
sor.
The chamber is regularly equipped with the MB2 display program controller. This efficient program control-
ler is equipped with a multitude of operating functions, in addition to recorder and alarm functions. Program-
ming of test cycles is easily accomplished via the modern MB2 touch screen controller and is also possible
directly with a computer via Intranet in connection with the APT-COM™ 4 Multi Management Software
(option, chap. 24.1).
The chamber comes equipped with an Ethernetserial interfacefor computer communication and with a USB
interface. In addition, the BINDER APT-COM™ 4 Multi Management Software permits networking up to
100 chambers and connecting them to a PC for controlling and programming, as well as recording and
representing temperature and pressure data. For further options, see chap. 24.
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