WARNING
Impermissible repair of explosion protected devices
Risk of e
xplosion in hazardous areas.
• Repairs may only be carried out by personnel authorized by Siemens.
• Do not repair ameproof joints. Flameproof joints are, for example, threaded inlets for cable
glands.
CAUTION
Hot surfaces
Risk
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.
7.3.1.1 Checking the seals
Inspect t
he seals at regular intervals
1. Clean the enclosure and seals.
2. Check the enclosure and the seals for cracks and damage.
3. If necessary, lubricate the seals or replace them. Use only original seals (
https://
www.siemens.com/industrymall).
7.3.1.2
Check cable glands
• Check the tightness of the cable glands at regular intervals.
• Tighten the cable glands if necessary.
7.4 Absence of pollutants
The product does not contain any dangerous substances above the concentration
v
alue according to GB/T 26572.
Service and maintenance
7.4 Absence of pollutants
SITRANS TH100/TH100Slim/TH320/TH420/TR320/TR420/TF320/TF420
76 Compact Operating Instructions, 07/2021, A5E41865021-AE
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