Endress+Hauser CYR52, Руководство по эксплуатации

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Maintenance CYR52
26
Hauser
7 Maintenance
WARNING
!
Process pressure and temperature, contamination, electrical voltage
Risk of serious or fatal injury
‣
If the sensor has to be removed during maintenance work, avoid hazards posed by pressure,
temperature and contamination.
‣
De-energize the device before opening it.
‣
Power can be supplied to switching contacts from separate circuits. Also de-energize these
circuits before working on the terminals.
Take all the necessary precautions in time to ensure the operational safety and reliability of the
entire measuring point.
Maintenance of the measuring point comprises:
• Cleaning the transmitter, assembly, ultrasonic transducer and ultrasonic generator
• Checking cables and connections
When performing any work on the device, bear in mind any potential impact this may have on
the process control system or on the process itself.
NOTICE
Electrostatic discharge (ESD)
Damage to electronic components
‣
Take personal protective measures to avoid ESD, such as discharging beforehand at PE or
permanent grounding with a wrist strap.
‣
For your own safety, only use genuine spare parts. With genuine parts, the function,
accuracy and reliability are also ensured after maintenance work.
7.1 Cleaning the transmitter, ultrasonic transducer and ultrasonic
generator
Clean the front of the housing with commercially available cleaning agents only.
The front is resistant to the following as per DIN 42 115:
• Ethanol (short periods)
• Diluted acids (max. 2% HCl)
• Diluted bases (max. 3% NaOH)
• Soap-based household cleaners
NOTICE
Prohibited cleaning agents
Danger of damaging the housing surface or housing seal
‣
For cleaning purposes, never use concentrated mineral acids or bases.
‣
Never use organic cleaners such as benzyl alcohol, methanol, methylene chloride, xylene or
concentrated glycerol cleaner.
‣
Never use high-pressure steam for cleaning purposes.
Clean the housing of the ultrasonic transducer with a damp cloth only.