Promag 10/50/53 Electromagnetic Flowmeter Installation
I. Installation Location
Installation location:
When gas accumulation or bubble formation occurs in the measuring tube, it will increase
. measurement error.
Therefore, please avoid the following installation locations:
The highest point of the pipeline, prone to gas accumulation!
●Install above a downward draining pipeline.
Pump installation location:
Do not install the sensor on the inlet side of the pump. To avoid damage to the measuring tube liner during suction pressure. When using piston pumps, diaphragm pumps, or peristaltic pumps
a pulsating flow buffer needs to be installed.
Non-full pipe:
Pipelines in an inclined non-full state need to be equipped with a drain port.
The empty pipe detection (EPD) function can detect the pipe status: full pipe or non-full pipe
status.
Accumulation of solid residue should be avoided! Do not install the sensor at the lowest point of an inclined pipe
it is recommended to install a drain valve.
Vertical pipeline:
In downward pipelines longer than 5 meters (16 feet), a siphon or drain valve needs to be installed downstream of the sensor.
To avoid damage to the measuring tube liner during suction pressure. This measure can also prevent the system from
cavitation due to pressure drop.
Installation on vertical pipeline (h> 5 m/16 ft)
1. Drain valve
2. Siphon
II. Installation Orientation:
The optimal installation orientation helps avoid gas accumulation and residue
accumulation in the measuring tube. In addition, for correct measurement of certain special fluids, the following accessories can be
selected:
●Electrode cleaning circuit (ECC): used to prevent conductive media accumulation in the measuring tube, such as when measuring fluids that easily adhere
●Empty pipe detection (EPD) function: for detecting non-full pipes, such as when measuring degassed fluids or changing process pressure
●Replaceable measuring electrodes: for measuring abrasive fluids (only
Promag W)
Vertical installation:
Ideal installation orientation for self-draining pipeline systems and measurement systems using empty pipe detection (EPD) or electrode open circuit detection (OED) functions.
Horizontal installation:
The measuring electrode plane must remain horizontal, which can prevent short-term insulation between the two electrodes due to gas.
bubbles.
The empty pipe detection function can only work properly when the measuring tube is installed horizontally and the transmitter housing is vertically upward. Otherwise, when the pipe is half-full or empty,
it cannot be guaranteed that the empty pipe detection function will work properly.
1. EPD electrode (empty pipe detection): (not applicable to Promag H,
DN2-15, 1/12'-/").
2. Measuring electrode (signal detection)
3. Reference electrode (potential equalization): not applicable to Promag H
Upstream and downstream straight pipe sections:
If possible, the sensor installation location should avoid pipe fittings such as valves, tees, and elbows.
Sensor nameplate:
1. Order number/serial number
2. Calibration K factor/zero point
3. Nominal diameter/pressure rating
4. Fluid temperature range TM: measuring tube
5. Material: liner/electrode
6. Reserved information for special products
7. Permissible ambient temperature
8. Observe device documentation
9. Additional information reserved for device version (approvals, certificates)
10. Calibration tolerance
11. Additional information (example):
EPD/MSU: empty pipe detection electrode
R/B: reference electrode
12. Protection class
13. Fluid direction
III. Vibration:
If vibration is very severe, pay attention to fixing the pipeline and sensor. Measures to prevent device vibration (L > 10 m/33 ft)
Note: If vibration is very severe, it is recommended to install the sensor and transmitter separately.
IV. Base and Support
If the nominal diameter is DN≥350 (≥14"), please install the sensor on a base with sufficient load-bearing capacity.
Note: Danger of damage! Do not use the outer frame to bear the weight of the sensor. Deformation of the outer frame may damage the excitation coil inside the sensor.
V. Potential Equalization - Grounding
The equipotential between the measured fluid and the sensor is a prerequisite for accurate measurement by electromagnetic flowmeters. Most sensors are equipped with standard reference electrodes to ensure equipotential connection. Usually, no other measures or grounding rings are needed to ensure potential equalization.
Promag L, Promag W, and Promag P reference electrode (standard).
●Promag H
- No reference electrode. Equipotential with the measured fluid is achieved through metal process connections.
- For systems using plastic process connections, grounding rings must be used to achieve system potential equalization.
Standard situation
When using the device in a grounded metal pipeline, potential equalization is achieved through the grounding terminal of the transmitter.
Special situation
The flowmeter is installed in:
●Ungrounded metal pipelines
This connection method is also applicable to:
●When system potential equalization cannot be achieved by conventional methods
●When extremely high equalizing currents may occur
Both flanges are connected to the pipe flanges via grounding cables (copper wire, cross-sectional area at least 6 mm2 (0.0093 in2)) and grounded.
Connect the transmitter or sensor terminal box to a dedicated grounding terminal to achieve system potential equalization.
●DN≤300 (12'): Install the grounding cable directly on the flange via flange bolts
on the conductive coating of the flange.
●DN≥350 (14"): Install the grounding cable directly on the metal bracket
The flowmeter is installed in:
●Plastic pipelines
●Pipelines with insulating liners
This connection method is also applicable to:
●When system potential equalization cannot be achieved by conventional methods
●When extremely high equalizing currents may occur
System potential equalization is achieved through additional grounding rings. The grounding rings are connected to the grounding terminal via grounding cables (copper wire, cross-sectional area at least 6 mm2 (0.0093
in2)). When installing grounding rings, please observe the requirements of the installation guide.
The flowmeter is installed in: pipelines with cathodic protection units
The flowmeter should be installed in an equipotential pipeline. Only connect the two pipe flanges via grounding cables (copper wire, cross-sectional area at least 6 mm2 (0.0093 in2)). Install the grounding cable directly on the conductive coating of the flange via flange bolts.
This connection method is also applicable to:
. The requirements of applicable specifications for equipotential installation must be observed.
. There must be no other conductive electrical connection between the pipeline and the flowmeter.
. Installation materials must meet the application torque requirements.
VI. Length of Connecting Cable
When installing a remote version instrument, please follow these points:
●Fix the cable in a metal shielded conduit. Movement of the cable can cause measurement signal distortion, especially when the fluid conductivity is low.
●Do not route the cable near electrical equipment and switch cabinets.
●Please ensure that the transmitter and sensor are equipotential.
●The permissible cable length Lmax depends on the fluid conductivity.
Gray shaded area = permissible range
Lmax = connecting cable length (unit [m]/[ft]) fluid conductivity
(unit μS/cm)
VII. Installation of Promag L Sensor
●Protective plates installed on the two sensor flanges (DN 50...300) are used to secure the flange connection to protect the PTFE liner during transportation. Therefore, do not remove these protective plates before installing the sensor into the pipeline.
●During device storage, the protective plates must not be removed.
●Ensure that the flange liner is not damaged or removed.
Note!
Screws, nuts, and sealing rings are not included in the scope of supply and must be provided by the customer. The sensor is installed between two pipe flanges:
●The required torque must be observed
●If grounding rings are used, please follow the installation guide supplied with the delivery.
●To comply with the technical specifications of the device, concentric installation in the measuring section is required
Sealing ring installation
When installing sealing rings, observe the following instructions:
●Hard rubber liner → additional sealing rings are always required!
●Polyurethane liner → no sealing rings required.
●For PFTE measuring tube liners, no sealing rings are required.
●For DIN flanges, only use sealing rings that comply with DIN EN 1514-1.
●Ensure that the installed sealing rings do not protrude into the pipe cross-section.
Note! Danger of short circuit! Do not use conductive sealing materials, such as graphite! A conductive layer will form on the inside of the measuring tube, short-circuiting the measurement signal.
Screw tightening torque (Promag L) see table
IX. Installation of Promag P Sensor
Note! The protective plates installed on the two sensor flanges can protect the flipped PTFE, so they should only be removed before installing the sensor.
●During device storage, the protective plates must not be removed.
●Ensure that the flange liner is not damaged or removed.
Note!
Screws, nuts, and sealing rings are not included in the scope of supply and must be provided by the customer.
The sensor is installed between two pipe flanges:
●The required torque must be observed
●If grounding rings are used, please follow the installation guide supplied with the delivery.
Sealing ring installation:
When installing sealing rings, observe the following instructions:
●For PFA or PFTE measuring tube liners, no sealing rings are required.
●For DIN flanges, only use sealing rings that comply with DIN EN 1514-1.
●Ensure that the installed sealing rings do not protrude into the pipe cross-section.
Note! Danger of short circuit! Do not use conductive sealing materials, such as graphite! A conductive layer will form on the inside of the measuring tube, short-circuiting the measurement signal.
Screw tightening torque (Promag L) see table
X. Installation of Promag H Sensor
Sealing ring use: When installing process connections, ensure that the relevant sealing rings are clean, dust-free, and correctly centered.
Note: When using metal process connections, the screws must be firmly tightened. The process connection together with the sensor forms a metal connection, ensuring the specified sealing pressure.
●For plastic process connections, please observe the maximum torque value for lubricated threads (7 Nm/ 5.2 lbf ft). Sealing rings must always be used between the process connection and the plastic mating flange.
●Sealing rings should be replaced periodically according to the application, especially when using molded sealing rings (aseptic type)! The replacement interval for sealing rings depends on the cleaning cycle, fluid temperature, and cleaning temperature. Sealing ring replacement parts can be ordered separately as accessories.
Use and installation of grounding rings (DN 2 - 25, 1/12'- 1'):
For plastic process connections (e.g., flange connections or adhesive connections), potential equalization between the sensor and fluid must be ensured through additional grounding rings. If grounding rings are lost, electrochemical reactions will damage the electrodes, thereby affecting sensor accuracy or causing sensor damage.
Grounding rings (including sealing rings) are installed inside the process connection.
The face-to-face distance is not affected.
Installing grounding rings
1 = process connection hex bolt
2 = O-ring sealing ring
4 = sensor
3 = grounding ring or plastic ring (placeholder part)
a. Loosen the four or six hex bolts (1), and remove the process connection from the sensor (4).
b. Remove the plastic ring (3) from the process connection, including the two O-ring sealing rings (2).
C. Insert one of the O-ring sealing rings (2) back into the groove of the process connection.
d. Place the metal grounding ring (3) into the process connection as shown.
e. Insert the second O-ring sealing ring (2) into the groove of the grounding ring.
f. Reinstall the process connection back into the sensor. During installation, please ensure that the maximum torque value for lubricated threads (7 Nm) (5.2 Ilbf
ft) is observed.
Welding the sensor to the pipeline (welding pipe joint)
Note!
Danger of damaging electronic components! Please ensure that the welding equipment is not grounded through the sensor or transmitter.
a. Tack weld the process connection to fix the sensor in the pipeline.
Suitable welding fixtures can be ordered separately as accessories.
b. Loosen the screws on the process connection flange and remove the sensor (including sealing rings) from the pipeline.
C. Weld the process connection into the pipeline.
Install the sensor back into the pipeline.
During installation, please ensure that the sealing rings are clean and correctly positioned.
Note!
●When properly welding on thin-walled pipelines conveying food, even if sealing rings are installed, they will not be damaged by heat.
However, it is recommended to remove the sensor and sealing rings before welding.
●If disassembly work is to be carried out, it must be possible to open the pipeline by approximately 8
mm (0.31 in).
XI. Rotating the Transmitter Housing
When it is inconvenient for the customer to observe the display head on site, the display head can be rotated.
Field aluminum housing used in non-hazardous areas:
a. Loosen the fixing screw
b. Gently rotate the transmitter housing clockwise to the stop (thread top)
C. Rotate the transmitter housing counterclockwise (maximum 360°) to the desired position.
Field aluminum housing used in Zone 1 or CI.I Div.1 hazardous areas
Rotating the field stainless steel housing:
XII. Installing the Wall-Mounted Housing
1. Direct wall mounting
Ensure that the ambient temperature does not exceed the permissible range (-20 --+60°C). Install in a shaded area to avoid direct sunlight.
Install with the cable entry facing downward
1. Terminal compartment
2. Fastening screw M6: max.o6.5 mm (0.25");
Screw head: max.o10.5 mm (0.4")
3. Fastening screw mounting hole on the housing
2. Column mounting dimension drawing
3. Panel mounting dimension drawing
