KROHNE SMARTPAT PH 8530, Handbook

Page: 20 / 52

4
ELECTRICAL CONNECTIONS
20
SMARTPAT PH 8530
www.krohne.com 03/2016 - 4002544803 - MA SMARTPAT PH 8530 R03 en
4.7 Installing the sensor
4.7.1 General installation instructions
Connection with sensor and control system
Figure 4-5: SMARTMAC 200 W connection to a control system with internal 250
Ω
resistor (left side). SMARTMAC 200 W
connection to a control system without internal 250
Ω
resistor (right side).
1 SMARTMAC 200 W
2
Sensor with VP2-S cable
3
Control system with internal 250
Ω
resistor
4 Control system without internal 250
Ω
resistor
SMARTMAC 200 W
without internal resistor SMARTMAC 200 W
with internal resistor
S Shield S Shield
A A
B Sensor - B Sensor -
F Loop - F Loop -
H Loop + G Loop + [250
Ω
]
WARNING!
Ensure that the pipeline is without pressure before installing or removing a sensor!
INFORMATION!
During installation you should fix a shut-off valve in front of and behind the instrument so that
the sensor can be taken out in case of check.
INFORMATION!
To achieve reliable measuring results, the electrodes must always have full contact with the
measuring medium.
INFORMATION!
Basically any installation position is possible. However, ensure that sufficient medium flows
through and around the electrodes (the conductive electrodes must always be completely
surrounded by the medium). Structural measures must be taken to prevent flow interruption or
gas bubbles.