Proline Prosonic Flow 93 Installation
Endress+Hauser
11
3.5.2 Protective ground connection
The sensor must be connected to the protective ground of the plant.
The plant grounding guidelines must be taken into account.
3.5.3 Degree of protection
The devices meet all the requirements for IP 67.
After mounting in the field or service work, the following points have to be observed to ensure
that IP 67 protection is retained:
• Install the measuring device in such a way that the cable entries do not point upwards.
• Do not remove the seal from the cable entry.
• Remove all unused cable entries and plug them with suitable, certified drain plugs.
• When working at low temperatures (below –20 °C / –4 °F), in particular, ensure the
suitability of the cables, cable entries and plugs is certified for these temperatures.
3.5.4 Post-connection check
• Are cables or the device damaged (visual inspection)?
• Does the supply voltage match the information on the nameplate?
• Do the cables comply with the specifications?
• Do the mounted cables have adequate strain relief and are they routed securely?
• Are all screw terminals firmly tightened?
• Are all cable entries installed, firmly tightened and correctly sealed?
• Cable routed as a "water trap" in loops?
• Are all the housing covers installed and securely tightened?
A0007549
Tighten the cable entries correctly.
A0007550
The cables must loop down before they enter the cable
entries (“"water trap").
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