7
3.
Fasten the compressed air supply. The air inlet has a smaller opening than the air outlet.
Both are indicated by arrows on the front.
Air resistance increases with hose lengh. The nominal widths given above apply to hose
lengths up to 3 m. Longer lines require larger cross sections.
The escaping air can be discharged via a hose. If the vibrator is to achieve full output,
the exhaust air hose must have a larger nominal diameter than the supply hose. The use
of the supplied silencer is mandatory. The silencer must be mounted at the free end.
Rainwater or any other liquid must not enter the housing when using outdoors. Is there a
risk that e.g. Rainwater runs into the housing through the air outlet, the exhaust air must
be discharged through a hose bent downwards.
4.
For critical installation situations secure the vibrators against falling by means of a safety
cable.
7
Start-up and operation
Observe the safety instructions in chap. Safety, from page 3 on.
Please refer to chap. Technical data, page 4 for permissible operating
conditions.
Set frequency
Set the centrifugal force or frequency required with an upstream pressure regulator. For this
purpose, slowly increase the pressure from approx. 1.5 bar to the required or necessary cen-
trifugal force.
The maximum permissible frequency or maximum permissible operating pressure must not
be exceeded. The frequency can be measured with a
Vibro
Scanner
or sirometer (optionally
available from
Netter
Vibration
).
After 30 minutes operating time: check if the initial frequency is still set. Adjust the frequency if
required.
Frequency / bearing life NCT
NCT 1 and NCT 2:
Due to high efficiency they reach very high frequencies. The high fre-
quencies reduce the bearing life and increase the sound level. Therefore,
Netter
Vibration
recommends operating the NCT 1 and NCT 2 only at 2-3 bar or only in interval operation.
NCT: operation in liquids
The operation of NCT in liquids requires the discharge of the compressed air into the atmos-
phere.
Permissible
operating
conditions