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10.3
Maintenance and repair work
WARNING
Impermissible repair and maintenance of the device
• Repair and maintenance must be carried out by Siemens authorized personnel only.
WARNING
Impermissible repair of explosion protected devices
Risk of explosion in hazardous areas
• Repair must be carried out by Siemens authorized personnel only.
WARNING
Impermissible accessories and spare parts
Risk of explosion in areas subject to explosion hazard.
• Only use original accessories or original spare parts.
• Observe all relevant installation and safety instructions described in the instructions for the
device or enclosed with the accessory or spare part.
WARNING
Improper connection after maintenance
Risk of explosion in areas subject to explosion hazard.
• Connect the device correctly after maintenance.
• Close the device after maintenance work.
Refer to Connecting (Page 77).
10.3.1
Uninstalling USB drivers
Procedure
1. Select "Ports (COM & LPT)" > "USB Serial Port (COMx)" in the Windows Device Manager.
2. Right-click on "USB Serial Port (COMx)".
Service and maintenance
10.3 Maintenance and repair work
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
Operating Instructions, 05/2020, A5E41864807-AB
179