Level limit switch
Series VN 4000
Technical Information / Instruction manual
page G
Setting: Sensitivity / Maintenance
Sensitivity
All sensors are factory setted. Therefore, they usually do
not have to be re-setted. If the bulk material has a strong
tendency to cake or deposit, the setting switch can be
set to position „A“ so as to decrease the sensitivity of the
probe (Factory presetting = position „B“).
Approximate min. bulk density on setting:
Please contact manufacturer if you intend to use the
device for special purposes.
A
Low sensitivity
B
High sensitivity
150g/l (9.5lb/ft
3
)
30g/l (1.9lb/ft
3
)
Maintenance
Normally the device requires no maintenance. However, depending on the application, the following should be observed and
inspected:
•
Mechanically damaged oscillating rods.
•
Coarse cleaning of the vibrating fork.
Sensor cables
Version VN 4020: Red
Yellow
Blue
Black
Version VN 4030: Red
White
Blue
Black
Version big housing:
1.
Open the housing lid
2.
Remove the field wiring cables
3.
Remove the sensor cables
4.
Unscrew the two fastening screws of the
electronic board
5.
Take out the electronic board
6.
Insert a new electronic board and tighten
fastening screws
7.
Connect the sensor cables and field wire cables
(see drawing)
Version small housing:
1.
Open the housing lid
2.
Remove the field wiring cables / plug
3.
Unscrew the cover plate
4.
Take out the electronic board and remove internal plug
5.
Insert a new electronic board in reverse sequence
6.
Connect the field wiring cables
Change of the electronic board:
Deenergise device and secure against being switched on again.
Setting „Sensitivity“
Vibranivo
®
1
2
3
4
5
6
7
8
9
10
11
12
VN 4000 a
gi161213
15
4.
4.
3.
3.
B
A
3.
3.
