Mounting; Meter Orientation; Meter Handling - ABB MINI-MAG 10D1475 Series Instruction Manual

10D1475 MINI-MAG MAGNETIC FLOWMETER INSTRUCTION MANUAL
Outline dimensions of the magnetic flowmeters are given in Figures 2-1 through 2-3. When applica-
ble, provide access for occasional servicing of the integrally mounted signal converters. At least five
inches of overhead clearance is required for cover removal as shown in Figure 2-1. Observe the
various clearances given on the drawings. If the cover is removable from the front for servicing of the
electronics, provide adequate working space. When a remote mounted signal converter is specified,
Converter outline and mounting dimensions are provided in the Instruction Bulletin supplied for the
particular Converter.
The installation site must be provided with a source of power for the meter's electronics (refer to the
ratings in Sections 1-2 & 1-3 and to the meter's data tag. The power source must have an external
disconnect and suitable fuse (or circuit breaker), as shown on the interconnection diagram.

2.3 Mounting

2.3.1 Meter Orientation

The Model 10D1475 MINI-MAG Magnetic Flowmeter may be installed in horizontal, vertical or sloping
pipe runs. However, precautions must be taken to assure that the meter is filled at all times during
measurement. A vertical installation, with the pipe line carrying liquid upwards, assures a filled
hydraulic line under low flow rate conditions and also minimizes wear on the meter lining by abrasive
grit. Horizontal installations should be made with the meter in the lower section of a pipeline to assure
a filled meter condition.
The electronic housing of the meter should be top oriented for horizontal or sloping installations. If
the electronic housing must be bottom oriented, vibration must be limited to be within the specifica-
tions shown in Section 1.4. Orienting the electronic housing top or bottom aligns the meter electrodes
in a lateral plane which eliminates the possibility of entrained air acting as an electrode insulator. An
electrode must not be on "top" when the meter is horizontally mounted.
The Magnetic Flowmeter must be oriented in accordance with the direction of process flow, as
indicated by the FLOW arrow on the meter data tag. Elbows should be located a minimum of three
pipe diameters upstream from the meter. Control valves should be located on the downstream side
of the meter. Control valves upstream of the meter can create turbulence that result in air pockets
and may effect the meter's accuracy or cause its output to be noisy. If for some reason the control
valve cannot be located downstream from the meter, a minimum of ten pipe diameters upstream are
required between the meter and the control valve. The requirements for control valves also applies to
pumps. Pipe diameters are measured from the centerline of the meter to the nearest edge of the
device, as shown in Figure 2-4. For higher accuracy requirements, use twice the number of pipe
diameters referenced. See Figure 2-4 for recommended piping arrangement.
When the process liquid contains abrasive grit, avoid disturbance upstream of the meter so that the
liquid passes smoothly through the meter; elbows and tees can distort the flow pattern causing
uneven liner wear.

2.3.2 Meter Handling

The TEFZEL liner of the Flowmeter must be protected at all times. The liner can be damaged by
sharp objects or cut by undue pressure. Do not pass any rope or wire sling through the meter liner.
2-2 INSTALLATION