Siemens ULTRAMAT 6F Manuel d'utilisation - Page 33
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5.3.3
Key switch
The Ex protection of the Ex p safety equipment can be deactivated (key inserted in the lock) using a key switch (bypass
switch). In this manner, the analyzer can also be connected electrically without protective gas purging, e.g. for maintenance
work. Some Ex p safety equipment offers the possibility of effecting the key switch function with an operating function (key
code).
Commissioning with the key switch always requires permission of the owner or a person authorized by him. It may only be
granted if it is certain that there is no explosive atmosphere for the duration of the planned work or if the necessary
precautions against the risk of explosion have been taken (fire permission certificate).
At the end of maintenance work, make absolutely sure that the key switch is turned off again through removal of the key.
6
Service and maintenance
6.1
Safety instructions
6.1.1
General safety instructions
CAUTION
Hazardous voltage at open device
Risk of electric shock when the enclosure is opened or enclosure parts are removed.
Before you open the enclosure or remove enclosure parts, de-energize the device.
•
If maintenance measures in an energized state are necessary, observe the particular precautionary measures. Have
•
maintenance work carried out by qualified personnel.
WARNING
Hot, toxic or corrosive process media
Risk of injury during maintenance work.
When working on the process connection, hot, toxic or corrosive process media could be released.
As long as the device is under pressure, do not loosen process connections and do not remove any parts that are
•
pressurized.
Before opening or removing the device ensure that process media cannot be released.
•
WARNING
Impermissible repair and maintenance of the device
Repair and maintenance must be carried out by Siemens authorized personnel only.
•
CAUTION
Electrostatic discharges
The electronic components and modules fitted in this device can be destroyed by electrostatic discharging.
Comprehensive measures (such as the wearing of protective clothing by the maintenance personnel) must therefore be
made to prevent electrostatic discharging wherever they are manufactured, tested, transported and installed.
Compact Operating Instructions in accordance with EN 61010-1 and EN 60079-0
A5E45779389002-01, 09/2018
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