33
9. T he explosion protection type of the telephone is:
II 2G E x e mb [ib] IIC T 5 Gb
E x e mb [ib] IIC T 5 Gb
II 2D E x tb [ib] IlIC T 100 °C Db
E x tb ] IlIC T 100 °C Db
-25°C T
a
60°C
-25°C T
a
60°C
II 2G E x e mb [ib] IIC T 6 Gb
E x e mb [ib] IIC T 6 Gb
II 2D E x tb [ib] IlIC T 80°C Db
E x tb [ib] IlIC T 80°C Db
-25°C T
a
40°C
-25°C T
a
40°C
DMT 03 AT E X E 034
10 . T he telephone must have zero potential to open the device. T he
waiting time before opening the telephone after de-energizing the
voltage is at least 2 minutes!
11 . Dust must not enter the device while it is open!
12 . T he cover seal and the collar of the lower part of the housing
required for the tightness of the housing cannot be damaged during
assembly or disasse mbly.
13 . During the commissioning of the operating equipment for use in
dust, the commissioned parts should be subject to a new piece
inspection.
14 . T he speaking funnel from the receiver consists of non-conductive
plastic. It may charge up dangerously with high air speed. T hus, it is
forbidden to clean the speaking funnel with compressed air.
15 . A rust film can form in case of a high concentration of sulphurous
gases in the air.
16 . We reserve the right to modify the product for its technical
development without preliminary notice.
