Electrical Connection - TESTO 6457 Instruction Manual

1. Turn the quick-change fitting manually to the service end position. To
operate the quick-change fitting, turn the adjusting nut anti-clockwise
as far as it will go in the direction of "SERVICE CLOSE – ZU" to bring
the quick-change fitting into the "Service position" and thus close it.
2. Remove the electrical connecting cable by unscrewing the connector
from the sensor by hand. Protect the connector from contamination and
moisture.
3. Remove the sensor from the quick-change fitting without using tools,
pulling it up and out vertically.
4. Mount the dummy plug (
interchangeable fitting.
5. Protect the sensor tip with the red protective transportation cap.
5.8

Electrical connection

Disconnect the system from the power supply when connecting.
WARNING
Note
30
The instrument may only be installed by a qualified
electrician. Follow the national and international regulations
regarding the installation of electrical engineering systems.
The power supply must be laid out in accordance with EN50178,
SELV, PELV.
If you are connecting the sensor directly or using a 4-wire
connecting cable, proceed as set out in 5.8.1.
If you have a potential-free 5-wire connection cable, proceed
as set out in 5.8.2.
see 3.4) on the sealing cone of the