Hardware manual

5-30 Agilent 7500 Series ICP-MS Hardware Manual
5 Troubleshooting
After the purge, if the number of revolutions of the turbomolecular pump does
not go down, the following causes are inferred.
• Faulty turbo pump controller.
• Faulty System I/O Board.
1208* Error: Interface Pressure remained high following gate valve
opening.
After opening the gate valve, the vacuum pressure (IF) did not go below the
limit (When the instrument is changing from Standby Mode to Analysis Mode).
Check vacuum pressure (IF), the number of revolutions and current of the
turbomolecular pump (I). The following causes are inferred.
• The orifice of the sampling cone is too big.
• The seal of the sampling cone is incomplete (Defective O- ring).
• The plasma is too far from the sampling cone.
• The power of the rotary pump is not connected or the breaker is OFF.
• The rotary pump oil level is low or the oil is dirty.
• Faulty turbomolecular pump (I) or the turbomolecular pump controller.
• The vacuum tubing has failed (the tubing is off, or a leak is caused by an
incomplete seal such as a pin hole or a defective O- ring.)
• A drop of water was introduced into the vacuum chamber.
• There is a fault in the Pirani gauge (IF) or System I/O Board.
1208* Error: IF/BK Pressure remained high following gate valve opening.
After opening the gate valve, the vacuum pressure (IF/BK) did not go below the
limit (When the instrument is changing from Standby Mode to Analysis Mode).
Check vacuum pressure (IF/BK), the number of revolutions and current of the
turbomolecular pump. The following causes are inferred.
• The orifice of the sampling cone is too big.
• The seal of the sampling cone is incomplete (Defective O- ring).
• The plasma is too far from the sampling cone.
• The power of the rotary pump is not connected or the breaker is OFF.
• The rotary pump oil level is low or the oil is dirty.
• Faulty turbomolecular pump or turbomolecular pump controller.
• The vacuum tubing has failed (the tubing is off, or a leak is caused by an
incomplete seal such as a pin hole or a defective O- ring.)
• A drop of water was introduced into the vacuum chamber.
• There is a fault in the Pirani gauge (IF/BK) or System I/O Board.
1209 Error: Shunt capacitor time out, did not reach desired value.
The Shunt capacitor was not controlled properly. Setting could not be done
within the prescribed time.
Check the operation of Shunt capacitor. The following causes are inferred.
• Defective drive mechanism of Shunt capacitor such as loosened screws.
• Defective potentiometer to detect the position of Shunt capacitor.