Siemens SITRANS P500, Руководство по эксплуатации, Страница: 191 / 238

Service and maintenance
10.1 Basic safety instructions
SITRANS P500 with HART
Operating Instructions, 12/2014, A5E02344528-09
191
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.
NOTICE
Electrostatic-sensitive devices
The device contains electrostatic-sensitive devices (ESD). ESD can be destroyed by
voltages far too low to be detected by humans. These voltages can occur if you simply
touch a component part or the electrical connections of a module without being
electrostatically discharged. The damage to a module caused by overvoltage cannot
normally be detected immediately; it only becomes apparent after a longer period of
operating time has elapsed.
Protective measures against the discharge of static electricity:
• Make sure that no power is applied.
•
Before working with modules, make sure that you discharge static from your body, for
example by touching a grounded object.
•
Devices and tools used must be free of static charge.
•
Hold modules only by their edges.
•
Do not touch connector pins or conductor tracks on a module with the ESD notice.