Notes On Using The Device In Areas With Combustible Dust; Maximum Admissible Surface Temperature; Minimum Signal Cable Length - JUMO flowTRANS MAG S Series Safety Manual

3.4

Notes on using the device in areas with combustible dust

DANGER – Explosion hazard!
Among other things, the dust explosion protection is ensured by the housing.
No changes may be made to the housing (e.g. removing or not using parts).
The device with dual-compartment transmitter housing is approved for use in potentially explosive areas
(gas and dust).
The Ex mark is provided on the nameplate.
3.4.1

Maximum admissible surface temperature

IMPORTANT (NOTE)!
The maximum surface temperature is applicable to dust layers of up to 5 mm (0.20 inches) in thickness.
This is to be used to determine the minimum admissible ignition and glow temperature for the dust at-
mosphere according to EN 60079.
The maximum admissible surface temperature must be reduced for thicker dust layers. The dust may be
conductive or non-conductive. EN 60079 ff. must be observed.
Model
406012/1-1
406013/1-1
406015/1-1
406016/1-1
406012/2-1
406013/2-1
406015/2-1
406016/2-1
406018/2-1
406019/2-1
3.4.2

Minimum signal cable length

The signal cable in explosion protection areas may not be shorter than 5 m (16.4 ft).
Surface temperature
70 °C (158 °F) to T
Medium
85 °C (185 °F) to T
Medium
70 °C (158 °F)
3 Mounting
23