User guide

3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com
Subject to technical amendments
© Copyright 2008 3B Scientific GmbH
•
Pull the mains plug.
• Remove the oil drain cap and drain the contami-
nated oil into a container. Take care not lose the
oil drain gasket.
• Dispose of the oil adhering to the local regula-
tions.
Oil can also be removed from the pump by opening
the stopcock and partially blocking the exhaust with a
cloth while the pump is running. Do not operate the
pump for more than 20 seconds using this method.
• When the drainage of oil completed, tilt the
pump forward to remove the residual oil.
• Screw in the oil drain cap.
• Remove the oil fill cap and fill the oil reservoir
with new vacuum pump oil until oil is seen at the
bottom of the sight glass.
• Ensure that the stopcock is closed before turning
on the pump.
• Allow it to run for one minute before checking
the oil level.
• If the oil level is below the sight glass oil level
line, fill oil slowly (with the pump running) until
the oil reaches the oil level line.
• Place back the oil fill cap, ensure the stopcock is
closed and the oil drain cap is closed tightly.
If the oil is badly contaminated with sludge that
forms during operation, you may use the following
method to remove the oil from the pump reservoir.
• Leave the pump running until it is warmed up.
• While the pump is still running, remove the oil
drain cap. Take care not lose the oil drain gasket.
• Restrict the exhaust slightly.
This will back-pressure the oil reservoir and force out
the sludge.
• Turn off the pump when the oil stops flowing.
• Repeat this procedure as required until the con-
taminants are removed.
• Screw in the oil drain cap and refill the oil reser-
voir to the proper oil level with clean vacuum
pump oil.
5. Troubleshooting guide
5.1 Failure to start
• Check if the voltage selector switch is in the right
position.
5.2. Oil leakage
• Ensure that that the oil is not a residual accumu-
lation of spillage etc.
If leakage exists, the housing gasket or the shaft seal
may need to be replaced.
• Contact the distributor.
If leakage exists in the area of the oil drain plug,
• reseal the plug using a commercial pipe thread
sealer.
5.3. Failure to attain a good vacuum
• Ensure the vacuum gauge and all connections are
in good condition and leak free.
• Confirm leakage by monitoring the vacuum with
the manometer while applying vacuum pump oil
at connections or suspected leak points. The vac-
uum will improve briefly while the oil is sealing
the leak.
• Ensure the pump oil is clean.
A badly contaminated pump may require several oil
flushes.
• Ensure the oil is at the proper level.
For optimum pump operation, the oil must be even
with the oil level line on the sight glass when the
pump is running.
• Do not overfill as operating temperatures will
cause the oil to expand, which will appear at a
higher level than when the pump is not running.
• To check the oil level, start the pump with the
stopcock closed.
• Check the oil level in the sight glass. Add oil if
necessary.
5.4 Automatic shut down
The pump is equipped with a thermal protection
function. If the ambient temperature is too hot, the
product may stop functioning.
• Do not to switch off the power supply immedi-
ately.
If the pump does not re-start automatically after 3
minutes,
• cool the pump by lowering the ambient tempera-
ture to prolong the lifespan of the vacuum pump.