MOLLET Vibro Level Indicators Instruction Manual
- June 8, 2024
- MOLLET
Table of Contents
- Type plate details with option B1
- Marking in accordance with ATEX and DIN EN IEC 60079-0
- Equipment category appropriation by zones
- Maximum ambient temperatures
- Special conditions and instructions for safe application
- Customer Support
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
MOLLET Vibro Level Indicators
Explosion protection information and supplement to the operating instructions.
Prior to the use of the device in potentially explosive atmospheres please, read and obey the special conditions and instructions for safe application on page VF6-EID-05
Please observe rules for maximum allowed ambient temperatures shown on page VF6-EID-04.
Type plate details with option B1
Marking in accordance with ATEX and DIN EN IEC 60079-0
Vibro level indicator for use at the boundary from zone 20 to zone 21.
Order code VF62A1B1… and VF63A1B1…
Marking: II 1 / 2 D
Equipment category appropriation by zones
Vibro level indicator for use at the boundary from zone 20 to zone 21.
Ambient temperatures Ta
The ambient temperature Ta defines the maximum operating temperature of the indicators. Inside the vessel this is process temperature (the air or the bulk goods temperature) nearby the device.
The maximum authorised ambient temperature / … °C at the electronic housing is dependent from the process temperature … °C/
(Please notice diagram at page VF6-EID-04)
Maximum surface temperature T
The maximum surface temperature T means the hottest point at the equipment.
Pressure, vacuum
Design of the devices is suitable for indicated pressures in the vessel. These pressures are outside of the range for atmospheric conditions defined in the guidance to the ATEX-Product-Directive.
Order code VF65A1B1 …
Marking: II 1 / 2 D
Equipment category appropriation by zones
Vibro level indicator for use at the boundary from zone 20 to zone 21.
Ambient temperatures Ta
The ambient temperature Ta defines the maximum operating temperature of the indicators. Inside the vessel this is process temperature (the air or the bulk goods temperature) nearby the device.
The maximum authorised ambient temperature / … °C at the electronic housing is dependent from the process temperature … °C/.
(Please notice diagram at page VF6-EID-04)
Maximum surface temperature Ta
The maximum surface temperature T means the hottest point at the equipment.
Pressure, vacuum
Design of the devices is suitable for indicated pressures in the vessel.
These pressures are outside of the range for atomospheric conditions defined in the guidance to the ATEX-Product-Directive.
Inside high process temperature, outside ambient temperature
Order code VF62A1B1…E1… and VF63A1B1…E1…
Marking: II 1 / 2 D
Maximum surface temperature T
Probe and vibration rod produce no increase of temperature, but they are able to take high temperatures from inside of the vessel and forward it.
Due to this, the surface temperature has to be determined according to the process temperature (temperature of bulk solids or ambient) inside of the vessel.
The maximum authorised ambient temperature / … °C at the electronic housing is dependent from the process temperature … °C/.
(Please notice diagram at page VF6-EID-04)
Separate electronic housing
Order code VF62A22B3… and VF63A22B3…
Marking: II 1 / 3 D
Equipment category appropriation by zones
Vibro level indicator for use at the boundary from zone 20 to zone 22.
Ambient temperatures Ta
The ambient temperature Ta defines the maximum operating temperature of the indicators. Inside the vessel this is process temperature (the air or the bulk goods temperature) nearby the device.
Maximum surface temperature T
The maximum surface temperature T means the hottest point at the equipment.
Pressure, vacuum
Design of the devices is suitable for indicated pressures in the vessel.
These pressures are outside of the range for atomospheric conditions defined in the guidance to the ATEX-Product-Directive.
Maximum ambient temperatures
The maximum authorised ambient temperature / … °C at the electronic housing is dependent from the process temperature … °C/.
(please notice diagram)
Example Ta – marking
Special conditions and instructions for safe application
- The installation, maintenance, initial operation, removal and repair have to be controlled resp. checked by an “authorized person” for explosion protection.
- For the electrical connection you have to take notice of the local and statutory requirements and/or the VDE 0100.
- Take notice of the specifications on the data plate.
- A fuse (with max. 4A) has to be connected in series to the voltage supply.
- Protect the signal contact from voltage peaks when inductive loads are connected.
- As soon as the device will be brought into the explosion hazardous area it has to be mounted immediately at the intended place and a cable has to be brought into the cable gland.
- Please check if the cable gland have loosened during mounting process or transport. When it is loosened, it has to be fixed again with a torque of 3.75 Nm.
- To secure the type of protection, the screw nut of the cable gland has to be fixed at the installation with a minimum torque of 2.7 Nm. ATTENTION! If it will be fastened too strong, the IP-protection can be affected.
- The device has to be grounded and the ground connection of the device has to be installed in such a way that mechanical damage will be excluded.
- The device may put into operation with built-in cap-sealing and when it is closed, only.
- Remove the dust from the housing before you open it and make sure that no dust turbulences exist.
- Switch off the power supply, before opening the device. (touch dangerous voltage)
- Please check position and intactness of all gaskets before you close the device.
- Tightening torque of distance nut M6x40: 3 … 4 Nm and of the lid screw M6x16: 3 Nm
- The maximum authorised temperatures for process (bulk solids) and ambience have to be observed.
- Take notice of the requirements of DIN EN 60079-14, DIN EN 60079-17 and DIN EN 1127-1, especially regarding the dust deposits and temperatures and follow the pertinent rules and regulations.
Customer Support
06 VF6-EID-06 06/21 © by MOLLET Explosion protection information MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 www.mollet.de
