Endress+Hauser PROline promag 10 P Handbuch

Electromagnetic flow

measuring system

PROline promag 10 P

Flow measurement in chemical

or process applications

Technical

Information

TI 094D/24/ae

Application

Electromagnetic flowmeter for measuring

liquids with a minimum conductivity of

50 µS/cm, such as:

• Acids or alkalis

• Chemically loaded wastewater

• Paints

• Sewage sludge

Nominal diameters from 1” to 12”

Maximum fluid temperature:

PTFE: 265°F (130°C)

Sensor fitting lengths to ISO and DVGW

Features and benefits

• Ideal for simple measuring tasks -

current output for displaying the

current flow, pulse output for driving

an external totalizer or as status

output

• Guaranteed safety of application -

Promag 10 offers all basic functions

to guarantee a high degree of

reliability and measured value stability

• Optimum process control based on an

accuracy of ± 0.5%

• PTFE lining guarantees maximum

resistance in the case of aggressive

fluids and temperatures up to 265°F

• Used in difficult conditions (in shafts,

areas with vibration, or permanently

under water) - the sensor can be

installed separate from the transmitter

and is availalbe with NEMA 6P (IP 68)

protection.

• Service friendly - functional design

makes maintenance work easier -

HART®, Fieldtool and FieldCheck

provide support right down to device

verification without the need for sensor

removal.

The Power of Know How

PROline Promag 10 P

Endress+Hauser

Function and system design

Faraday’s law of induction

states that a voltage is induced in a conductor moving in a

magnetic field. In electromagnetic measuring, the flowing medium corresponds to

the moving conductor. The induced voltage is proportional to the flow velocity and is

detected by two measuring electrodes and transmitted to the amplifier. Flow volume

is computed on the basis of the pipe’s diameter.The constant magnetic field is

generated by a switched direct current of alternating polarity.

Ue = B · L · v

Q = A · v

Ue = induced voltage

B = magnetic induction (magnetic field)

L = electrode gap

v = flow velocity

Q = volume flow

A = pipe cross-section

I = current strength

The measuring system consists of a transmitter and a sensor.

Two versions are available:

• Compact version: transmitter and sensor form a single mechanical unit.

• Remote version: transmitter and sensor are installed separately.

Transmitter:

• Promag 10 (user interface with push buttons for operation, unilluminated two-line

display)

Sensor:

• Promag P, 1” to 12” (DN 25 to 300)

Input

Flow rate (proportional to induced voltage)

Typically v = 0.033 to 33 ft/s (0.01 to 10 m/s) with the specified measuring accuracy

Over 1000 : 1

Measuring system

Measuring principle

Measured variable

Measuring range

Operable flow range

PROline Promag 10 P

Endress+Hauser 3

Current output:

Active, galvanically isolated, full scale value selectable temperature coefficient:

typically 1.1 µA/°F (2 µA/°C)

Resolution: 1.5 µA

Active: 4 to 20 mA, RL< 700Ω(HART®, RL≥250Ω)

Pulse output:

Passive, open collector, 30 VDC, 250 mA, galvanically isolted.

Alternatively configurable as:

- Pulse output:

Pulse value and pulse polarity selectable, maximum pulse width configurable

(5 to 2000 ms), pulse frequency maximum 100 Hz

- Status output:

Configurable e.g. for error messages, Empty Pipe Detection (EPD), recognition

of flow direction, limit values.

• Current output →failure response selectable

• Pulse output →failure response selectable

• Status output → “non-conductive” by fault or power supply failure

See “Output signal”

Switch point for low flow cutoff are selectable

All circuits for inputs, outputs, and power supply are galvanically isolated from each

other.

Output signal

Load

Signal on alarm

Low flow cutoff

Galvanic isolation

Output

Power supply

Electrical connection

measuring unit

a Cable for power supply: 85 to 250VAC,

20 to 28VAC, or 11 to 40 VDC

Terminal No. 1: L1 fo AC, L+ for DC

Terminal No. 2: N for AC, L- for DC

b Signal cable: terminals No. 24 to 27

c Cover of the electronics compartment

d Terminals for the power supply

e Terminals for the current output

f Service adapter for connecting service interface

FXA 193 (FieldCheck™, FieldTool™)

g Grounding terminal for signal-cable shield

Maximum cable size, 16 AWG (2.5 mm2)

Terminal No. (outputs)

Ordervariant 24 (+) / 25 (-) 26 (+) / 27 (-)

10***-*********APulse output Currentoutput

HART®

Pulseoutput(passsive)

Opencollector, maximum 30VDC / 250 mA, galvanicallyisolated,configurable

Operatingmodepulse: pulsefrequencymaximum100 Hz

Operaingmodestatus: yes,configurable

Currentoutputactive

Galvanically isolated, active: 4 to 20 mA, RL< 700Ω(HART®, RL≥250Ω)

Groundconnection,powersupply, see diagramabove.

aba

2127

–

–26

+L1

(L+) N

(L-)

PROline Promag 10 P

Endress+Hauser

Electrical connection, remote

version

a Cover of the connection compartment

b Cover of the sensor connection housing

c Signalcable

d Coil current cable

n.c. Not connected, isolated cable shields

Supply voltage 85 to 250 VAC, 45 to 65 Hz

20 to 28 VAC, 45 to 65 Hz / 11 to 40 VDC

Power supply and signal cable (outputs):

• 1/2” NPT

Connecting cable for remote version:

• 1/2” NPT

Coil cable:

• 2 x 18 AWG (0.75 mm2) PVC cable with common, braided copper shield,

approximately 0.28” diameter (Ø approx. 7 mm)

• Conductor resistance: ≤0.011 Ω/ft (37 Ω/km)

• Capacitance: core/core, shield grounded: ≤36 pF/ft (120 pF/m)

• Permanent operating temperature: -5° to +180°F (–20 to +80°C)

Signal cable:

• 3 x 20 AWG (0.38 mm2) PVC cable with common, braided copper shield,

approximately 0.28” diameter (Ø approx. 7 mm) and individually shielded cores.

• With Empty Pipe Detection (EPD): 4 x 20 AWG (0.38 mm2) PVC cable with

common, braided copper shield, approximately 0.28” diameter (Ø approx. 7 mm)

and individually shielded cores.

• Conductor resistance: ≤0.015 Ω/ft (50 Ω/km)

• Capacitance: core/shield: ≤128 pF/ft (420 pF/m)

• Permanent operating temperature: -5° to +180°F (-20 to +80 °C)

• Conductor cross-section: maximum 0.004 in2(2.5 mm2)

Cable entry

Cable specifications

Electrode circuit Coil circuit

E1 E2GND E

S1 E1 E2 S2GNDE S

Esc

n.c. n.c.n.c.

brn

wht

grn

yel

EPDPipe

Meas.signal

PROline Promag 10 P

Endress+Hauser 5

a = signal cable, b = coil current cable (maximum 16 AWG (2.5 mm2)

1 = Core 5 = Core strengthening

2 = Core insulation 6 = Cable shield

3 = Core shield 7 = Outer jacket

4 = Core jacket

Operation in areas of severe electrical interference:

The measuring device complies with the general safety requirements in accordance

with EN 61010, the EMC requirements of EN 61326, and NAMUR recommendation

NE 21.

Caution:

Grounding is by means of the ground terminals provided for that purpose inside the

connection housing. Keep the stripped and twisted lengths of cable shield to the

terminals as short as possible.

85 to 250 VAC: < 12 VA (including sensor)

20 to 28 VAC: < 8 VA (including sensor)

11 to 40 VDC: < 6 W (including sensor)

Switch-on current:

• maximum 3.3 A (< 5 ms) at 24 VDC

• maximum 5.5 A (< 5 ms) at 28 VAC

• maximum 16 A (< 5 ms) at 250 VAC

Lasting minimum 1/2 power cycle:

EEPROM retain the measuring system data in the event of a power supply failure

Power consumption

Power supply failure

Potential equalization Standard case

Perfect measurement is only ensured when the medium and the sensor have the

same electrical potential. Most Promag sensors have a standard installed reference

electrode which guarantees the required potential matching. This usually means that

additional potential matching measures are unnecessary.

NOTE: For installation in metal pipes, it is advisable to connect the ground terminal

of the transmitter housing to the piping.

Caution:

For sensors without reference electrodes or without metal process terminals, carry

out potential matching as per the instructions for special cases described below.

These special measures are particularly important when standard grounding practice

cannot be ensured or extremely strong matching currents are expected.

PROline Promag 10 P

Endress+Hauser

Metallic, ungrounded pipes

In order to avoid errors in measurement, use grounding cables to connect each

sensor flange to its corresponding pipe flange and ground the flanges. Connect the

transmitter or sensor connection housing, as applicable, to ground by means of the

grounding terminal provided for that purpose.

Note:

The grounding cable for flange-to-flange connections can be ordered separately as

an accessory from Endress+Hauser.

•Τhe grounding cable is in direct connection with the conductive flange

coating and is secured by the flange screws.

Potential equalization with equalizing currents in metallic, non-grounded piping systems

Plastic pipes and lined pipes

Normally, potential is matched using the reference electrodes in the measuring tube.

However, in exceptional cases it is possible that, due to the grounding plan of a

system, large matching currents flow over the reference electrodes. This can lead to

destruction of the sensor, e.g. through electrochemical decomposition of the elec-

trodes. In such cases, e.g. for fiberglass or PVC piping, it is recommended that you

use additional ground disks for potential matching.

When using ground disks, note the following points:

• Ground disks can be ordered from Endress+Hauser as an accessory

• Ground disks (including seals) increase the installation length. Refer to the

disk dimensions.

Caution:

Risk of damage by electro-chemical corrosion. Note the electro-chemical series of

metals, if the grounding rings and measuring electrodes are made of different

materials.

9 AWG Cu

PROline Promag 10 P

Endress+Hauser 7

Pipes with cathodic protection

If the medium cannot be grounded for process-related reasons, the measuring

device must be installed in such a way as to be potential-free:

• When installing the measuring device, make sure that there is an electrical

connection between the two piping runs, 9 AWG copper wire (6 mm2).

• Make sure that the installation materials do not establish a conductive connection

to the measuring device and that the installation materials withstand the

tightening torques applied when the threaded fasteners are tightened.

• Also comply with the regulations applicable to potential-free installation.

1 = isolating transformer, 2 = electrically insulated

Performance characteristics

To DIN 19200 and VDI/VDE 2641:

• Medium temperature: +28 °C ± 2 K

• Ambient temperature: +22 °C ± 2 K

• Warm-up time: 30 minutes

Installation:

• Inlet run >10 x Dia

•Outlet run > 5 x Dia

• Sensor and transmitter grounded.

• Sensor centered relative to the pipe.

Pulse output: ± 0.5% o.r. ± 0.02% of max. full scale (o.r. = of reading)

Current output: plus typically ± 5 µA

Supply-voltage fluctuations have no effect within the specified range.

Reference conditions

Measured error

Repeatability

Measured error in [%] of reading

Maximum ± 0.2% o.r. ± 0.02% of maximum full scale (o.r. = of reading)

9 AWG Cu

(1) 6

(2) 13

(4) 20

(6) 26

(8) 33

(10)

2.5

[%]

2.0

1.5

1.0

0.5

v ft/s (m/s)

0.5 %

PROline Promag 10 P

Endress+Hauser

Operating conditions: Installation

Installation instructions Mounting location

Correct measuring is possible only if the pipe is full. Avoid the following locations:

• Highest point in the run. Risk of air accumulating

• Directly upstream from an open pipe outlet in a down pipe

Installation of pumps

Do not install the sensor on the inlet side of a pump. This precaution is to avoid low

pressure and the consequent risk of damage to the lining of the measuring tube.

It might be necessary to install pulse dampers in systems incorporating reciprocat-

ing, diaphragm or peristaltic pumps. The sensor is shock and vibration resistant for

acceleration up to 2 g in accordance with IEC 68-2-6.

Partially filled pipes

Partially filled pipes with gradients necessitate a drain-type configuration. The Empty

Pipe Detection (EPD) function offers additional protection by detecting empty or

partially filled pipes.

Caution:

To avoid the risk of solids accumulating, do not install the sensor at the lowest point

in the drain. It is advisable to install a cleaning valve.

5 x D

2 x D

PROline Promag 10 P

Endress+Hauser 9

Vertical pipes

Install a siphon (2) or a vent valve (1) downstream of the sensor in vertical pipes

longer than 15 feet (5 meters). This precaution is to avoid low pressure and the

consequent risk of damage to the lining of the measuring tube. These measures

also prevent the system losing prime, which could cause air inclusions.

1 = vent valve, 2 = siphon

Orientation

An optimum orientation helps avoid gas and air accumulations and deposits in the

measuring tube. Promag, nevertheless, supplies a range of options and accessories

for correct measuring of problematic mediums.

Horizontal orientation:

The measuring electrode-plane should be horizontal. This prevents brief insulation of

the two electrodes by entrained air bubbles.

Caution:

Empty Pipe Detection functions correctly only when the measuring device is installed

horizontally and the transmitter housing is facing upward. Otherwise, there is no

guarantee that Empty Pipe Detection will respond if the measuring tube is only

partially filled or empty.

1 = EPD electrode (Empty Pipe Detection)

2 = Measuring electrodes (signal detection)

3 = Reference electrode (potential equalization)

> 15 ft

(5 m)

Vertical orientation:

This orientation is ideal for self-emptying piping systems and for use in conjunction

with Empty Pipe Detection.

PROline Promag 10 P

Endress+Hauser

Vibrations

Secure the piping and the sensor if vibration is severe.

Caution:

It is advisable to install the sensor and transmitter separately if vibration is exces-

sively severe. The sensor is shock and vibration resistant for acceleration up to 2 g

in accordance with IEC 68-2-6.

Inlet and outlet runs If possible, install the sensor well clear of fittings such as valves, T-pieces, elbows,

etc. Compliance with the following requirements for the inlet and outlet runs is

necessary in order to ensure measuring accuracy:

• Inlet run ≥5 x pipe diameter

• Outlet run ≥2 x pipe diameter

Adapters With the help of the appropriate adapters (reducers and expanders) the sensor can

be mounted in a pipeline of a larger diameter. For slowly flowing fluids, the resulting

higher velocity increases the measuring accuracy.

> 30 ft

(10 m)

5 x D 2 x D

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