Post-Installation Check; Electrical Connection; Connection Conditions; Cover With Securing Screw - Endress+Hauser Liquiphant FTL64 Operating Instructions Manual

Electrical connection

16
5.4

Post-installation check

 Is the measuring device undamaged (visual inspection)?
 Does the measuring device conform to the measuring point specifications?
For example:
• Process temperature
• Process pressure
• Ambient temperature range
• Measuring range
 Are the measuring point number and labeling correct (visual inspection)?
Is the measuring device adequately protected against precipitation and direct sunlight?
 Is the device properly secured?
6 Electrical connection
6.1

Connection conditions

6.1.1

Cover with securing screw

In the case of devices for use in the hazardous area, the cover is sealed by a securing screw.
NOTICE
If the securing screw is not positioned correctly when the cover is screwed closed, the
cover cannot provide secure sealing.
‣
Before unscrewing the cover, make sure that the securing screw does not protrude too
far over the edge of the cover. Loosen the securing screw with a maximum of 2 turns.
‣
Pay attention to the position of the securing screw when screwing the cover closed.
 16 Cover with securing screw
6.1.2

Connecting protective earth (PE)

The protective earth conductor at the device must only be connected if the device' s
operating voltage is ≥ 35 V
When the device is used in hazardous areas, it must always be included in the potential
equalization of the system, irrespective of the operating voltage.
The plastic housing is available with or without an external protective earth
connection (PE). If the operating voltage of the electronic insert is < 35 V, the plastic
housing has no external protective earth connection.
2 x
or ≥ 16 V eff.
DC AC
Liquiphant FTL64
A0039520
Endress+Hauser