NOTICE
Prior to lifting the unit, refer to the Rosemount 3812 Liquid Ultrasonic Flow Meter
nameplate or outline dimensional (general arrangement) drawing for the assembled
weight.
WARNING
FLUID CONTENTS MAY BE UNDER PRESSURE
When the meter is under pressure, DO NOT attempt to remove or adjust the transducer
housing.
Attempting to do so may release pressurized fluid, resulting in serious injury for personnel
or equipment damage.
WARNING
FLUID CONTENTS MAY BE HAZARDOUS
The meter must be fully depressurized and drained before attempting to remove the
transducer housing. If fluid leaks at the joint of the transducer housing and the body as the
transducer housing is unscrewed, immediately reinstall it.
Failure to comply may cause serious injury to personnel or equipment damage.
A. Transducer housing and meter body joint
CAUTION
ESCAPING FLUIDS HAZARD
The purchaser of the meter is responsible for the selection of Rosemount components/
seals and materials compatible with the chemical properties of the measurement fluid.
Failure to select suitable meter components/seals may cause escaping fluids, resulting in
injury or equipment damage.
Maintenance and Troubleshooting Manual
Meter maintenance
00809-0100-3812
April 2022
Rosemount 3812 Liquid Ultrasonic Flow Meter
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