BUSCH VacTest, Instruction Manual, Page: 17 / 24

Maintenance and Service | 7
Instruction Manual VACTEST DCC 400_EN_en 17 / 24
NOTICE
The unit is not prepared for customer repair.
Risk of damage to the unit!
• Defective sensor heads can be exchanged on-site by calibrated replacement sensors.
The device requires no maintenance. External dirt and soiling can be removed by a damp
cloth.
Should a defect or damage occur on the device, please send the unit to us for repair and
fulfil the declaration of decontamination downloadable from
www.buschvacuum.com
.
NOTE
Malfunction of the unit, which is caused by contamination or wear and tear is not cov-
ered by warranty.
7.1 Replacing the Sensor Head
Disassembly:
• Vent the vacuum system to atmospheric pressure and allow to cool.
• Switch off the power supply on the controller or disconnect the gauge from the mains.
• Disconnect the gauge from the flange.
• Unscrew the small hex head screws paying attention to the sealing washers.
• Remove carefully the housing.
Housing including
electonics
Seal
Screw with seal
Vacuum Flange
Sensor head
with magnet
Mind the pins
Assembly:
• Assemble carefully the housing and the sensor head (pay attention to pins and seal
positions).
• Screw the small hex head screws with their respective seal.
• Install the gauge.