Maintenance And Repair Work; Defining The Maintenance Interval; Checking The Gaskets - Siemens 7MF8.24 Series Compact Operating Instructions

WARNING
Improper connection after maintenance
Danger of explosion in areas subject to explosion hazard.
● Connect the device correctly after maintenance.
● Close the device after maintenance work.
Refer to Chapter "Connecting (Page 14)".
WARNING
Use of a computer in a hazardous area
If the interface to the computer is used in the hazardous area, there is a danger of explosion.
● Ensure that the atmosphere is explosion-free (hot work permit).
CAUTION
Releasing key lock
Improper modification of parameters could influence process safety.
● Make sure that only authorized personnel may cancel the key locking of devices for safety-related applications.
CAUTION
Hot surfaces
Danger of burns during maintenance work on parts having surface temperatures exceeding 70 °C (158 °F).
● Take corresponding protective measures, for example by wearing protective gloves.
● After carrying out maintenance, remount touch protection measures.

Maintenance and repair work

Defining the maintenance interval

WARNING
No maintenance interval has been defined
Device failure, device damage, and risk of injury.
● Define a maintenance interval for regular tests in line with device use and empirical values.
● The maintenance interval will vary from site to site depending on corrosion resistance.

Checking the gaskets

Inspect the seals at regular intervals
NOTICE
Incorrect seal changes
Incorrect measured values will be displayed. Changing the seals in a process flange of a differential pressure measuring
cell can alter the start-of-scale value.
● Changing seals in devices with differential pressure measuring cells may only be carried out by personnel authorized
by Siemens.
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SITRANS P300 (7MF8.23.. 7MF8.24.. 7MF8.25..)
A5E03434759-01, 08/2011