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5.4 Requirement for electric connection
Before making any electrical connections to the Pmag, consider the following standards and be sure to have proper power
supply, conduit, and other accessories.
5.4.1 Conduit Connections
The Pmag Integral Mount Magnetic Flowmeter Transmitter has 4 M16*1.5 conduit connections.
5.4.2 Transmitter Input Power
The Pmag Transmitter is designed to be powered by voltages ranging 85÷265Vac (50 a 60 Hz), 24Vac or 24Vdc.
5.4.3 DC Power Requirements
Units powered with 24Vdc may draw up to 2 amps of current. As a result, the input power wire must meet certain
gauge requirements.
5.4.4 Disconnects
The supply wires should be connected to the device through an external disconnect or circuit breaker. The disconnect
or circuit breaker should be clearly labeled and located near the transmitter.
5.4.5 Overcurrent Protection
Pmag requires overcurrent protection of the supply lines. Maximum rating of overcurrent devices are as follows:
Pmag
- Installation
5.5 ENVIRONMENTAL CONSIDERATIONS
To ensure maximum transmitter life, avoid excessive heat and vibration.Typical problem areas include high-vibration lines
with integrally Mounted transmitters, warm-climate installations in direct sunlight, and outdoor installations in cold
climates. Because the Pmag System requires external power, access to a suitable power source must be ensured.
Overheating will damage the flowtube. Do not encapsulate the flowtube with heating elements
5.6 Mounting
Electric magnetic flow meter has a flanged connector, and meets standard UNI EN 1092-1 ( Ex UNI 2223).
5.7 Environment of the installation
1) The Pmag must by mounted in dry and well ventilated site. Not install the instrument in the place where the water is easily accumulated.
2) The instrument should not be exposed. Shelter is needed where the instrument is installed outside.
3) Vibration should be avoided in the place where the instrument is to be installed.
4) Keep the instrument away from strong magnetic field where big electric motor or transformer are installed.
5) The place where the instrument is installed shall be accessible for maintenance
5.8 Selecting the place for installation
1) The arrow mark on the sensor must be in accordance with the medium flow direction in the pipeline.
2) The sensor must be full with the medium all the time.
3) The straight length of the upstream pipeline must not be less than 5xD, and the downstream 3x3D, where D is the
inner diameter of the pipe, and the middle of the sensor can be a point of the lengths
