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Electrical Installation
January 2023
•
Pull-up voltage is 24 VDC
3.3
Grounding meter electronics
Rosemount 3812 Liquid Ultrasonic Flow Meter electronics should be internally
grounded for intrinsically safe operations. Connect a wire to the chassis ground
lug installed inside the Transmitter Electronics Enclosure as the primary ground. A
secondary ground is located outside of the Transmitter Electronics Enclosure (see
Figure
NOTICE
The internal grounding terminal shall be used as the primary equipment ground.
The external terminal is only a supplemental bonding connection where local
authorities permit or require such a connection.
Figure 3-1: Internal Transmitter Electronics Enclosure chassis ground
A. Transmitter Electronics Enclosure internal ground lug
Figure 3-2: External ground lug
A. External ground lug
44
3-2). Digital grounds should never be connected to chassis ground.
Installation manual
00825-0100-3812
Rosemount 3812 Liquid Ultrasonic Flow Meter
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