201
5-0
3
30
Pulscon LTC57 PROFIBUS PA
Mounting
Securing rod probes
• For Ex-approvals: For probe lengths
3 m (10 ft) a support is required.
• In general, rod probes must be supported if there is a horizontal flow (e. g. from an agitator)
or in the case of strong vibrations.
• Rod probes may only be supported at the end of the probe.
Figure 6.11
1
Probe rod, uncoated
2
Sleeve bored tight to ensure electrical contact between the rod and sleeve!
3
Short metal pipe, e. g. welded in place
4
Probe rod, coated
5
Plastic sleeve, e. g. PTFE, PEEK or PPS
6
Short metal pipe, e. g. welded in place
1
2
3
4
5
6
∅ a
∅ b
≈50 (1.97)
∅ < 25 (1.0)
≈3 (0.12)
≈50 (1.97)
mm (in)
Warning!
Poor grounding of the end of probe may cause measuring errors.
• Apply a narrow sleeve which has good electrical contact to the probe.
Warning!
Welding may damage the main electronics module.
• Before welding: Ground the probe and dismount electronics.