Aplisens PEM-500 User manual

USER MANUAL
ELECTROMAGNETIC FLOWMETER
PEM-500
EN.IO.PEM.500
AUGUST 2020
APLISENS S.A., 03-192 Warsaw, Morelowa 7 St,
tel. [phone]; fax [phone]
www.aplisens.com, e-mail: [e-mail]
Revision 01.A.001

PRODUCT CODE –see: (➔Flowmeter identification).
The QR code or link identifies the flowmeter and provides quick access to the following documentation on the
manufacturer’s website: user’s manual, MODBUS manual, configuration manual, declarations of conformity and
copies of certificates.
PEM-500
https://www.aplisens.pl/ID/002600110009000000000000000352/

Symbols used
Symbol
Description
Warning to proceed strictly in accordance with the information contained in the
documentation in order to ensure the safety and full functionality of the device.
Information particularly useful during installation and operation of the device.
Information on disposal of used equipment.
BASIC REQUIREMENTS AND SAFE USE
The manufacturer will not be liable for damage resulting from incorrect installation,
failure to maintain a suitable technical condition of the device or use of the device
other than for its intended purpose.
Installation should be carried out by qualified staff having therequired authorizations
to install electrical and I&C equipment. The installer is responsible for performing
the installation in accordance with manual as well as with the electromagnetic
compatibility and safety regulations and standards applicable to the type of
installation.
In systems with I&C equipment, in case of leakage, there is a danger to staff due to
the medium under pressure. All safety and protection requirements must be
observed during installation, operation and inspections.
If a malfunction occurs, the device should be disconnected and handed over to the
manufacturer for repair.
In order to minimize the risk of malfunction and associated risks to staff, the device
is not to be installed or used in particularly unfavourable conditions, where the
following hazards occur:
−possible mechanical impacts, excessive shocks and vibration;
−excessive temperature fluctuation;
−water vapour condensation, dusting, icing.
Changes made to the manufacturing of products may be introduced before the paper version of the
manual is updated. The up-to-date manuals are available on the manufacturer’s website:
www.aplisens.com.

EN.IO.PEM.500
4 Revision 01.A.001/2020.08
TABLE OF CONTENTS
1. INTRODUCTION..........................................................................................6
1.1. Trademarks............................................................................................................................6
2. SAFETY.......................................................................................................6
3. TRANSPORT AND STORAGE....................................................................6
3.1. Delivery check........................................................................................................................6
3.2. Transport................................................................................................................................6
3.3. Storage ..................................................................................................................................6
5. IDENTIFICATION.........................................................................................7
5.1. Manufacturer’s address..........................................................................................................7
5.2. Flowmeter identification..........................................................................................................7
5.3. CE mark, declaration of conformity.........................................................................................8
6. CONSTRUCTION ........................................................................................8
6.1. Intended use and features......................................................................................................8
6.2. Design and overall dimensions...............................................................................................8
6.2.1. Electrodes.....................................................................................................................10
7. INSTALLATION.........................................................................................11
7.1. General recommendations...................................................................................................11
7.2. Recommended assembly method for the sensor..................................................................11
7.3. Installation of the PEM-500 flowmeter.................................................................................13
8. ELECTRICAL CONNECTION....................................................................14
8.1. Grounding............................................................................................................................16
9. START-UP.................................................................................................17
10.TECHNICAL PARAMETERS.....................................................................17
10.1. Electrical connections...........................................................................................................17
10.1.1. Output signals...............................................................................................................17
10.1.2. Power supply................................................................................................................17
10.2. Protection class....................................................................................................................17
10.3. Technical parameters...........................................................................................................18
10.3.1. Technical specifications................................................................................................18
10.4. Reference conditions............................................................................................................18
10.5. Metrological parameters.......................................................................................................19
10.5.1. Standard measuring ranges..........................................................................................19
10.5.2. Table od volumetric flows calculated for characteristic fluid flow velocities for flanged
execution acc. to DIN.................................................................................................................20
10.5.3. Available pressure ranges acc. to DIN, ANSI of flowmeters operation for individual
designs of DN size of flange connections...................................................................................21
10.5.4. Selection of the diameter and measuring range of the flowmeter..................................21
10.6. Permissible ambient and operating parameters....................................................................22
11.MAINTENANCE.........................................................................................23
11.1. Periodic inspections .............................................................................................................23
11.2. Non-periodic inspections......................................................................................................23
11.3. Cleaning / washing...............................................................................................................23
12.SCRAPPING, DISPOSAL..........................................................................23
13.ADDITIONAL INFORMATION...................................................................23
13.1. History of revisions...............................................................................................................23

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Revision 01.A.001/2020.08 5
LIST OF DRAWINGS
Figure 1. Nameplate of the PEM-500..................................................................................................7
Figure 2. Overall dimensions of the flowmeter transmitter...................................................................8
Figure 3. Overall dimensions of the sensor.........................................................................................9
Figure 4. Recommended installation of the sensor. ..........................................................................11
Figure 5. Installation of the PEM-500 flowmeter –examples.............................................................13
Figure 6. Example of functional earthing connection for metallic (A) piping and for insulated piping using
earthing rings (B)...............................................................................................................................16
Figure 7. Connection of the functional earthing to the sensor enclosure...........................................16
Figure 8. Recommended flow values for the PEM-500 flowmeter.....................................................21
Figure 9. “Outputs” tab view – setting the flow values for 4 mA and 20 mA current...........................22
LIST OF TABLES
Table 1. PN 16 sensor data.................................................................................................................9
Table 2. PN 25 sensor data...............................................................................................................10
Table 3. PN 40 sensor data...............................................................................................................10
Table 4. Marking of power and signal conductors for the low voltage version (24 V).........................14
Table 5. Marking of power conductors for the high-voltage version (230 V). .....................................14
Table 6. Marking of signal conductors for the high-voltage version (230 V).......................................15
Table 7. Technical data od PEM-500 flowmeter................................................................................18
Table 8. Flow values for the PEM-500 flowmeter..............................................................................19
Table 9. Volume flow versus fluid linear velocity. ..............................................................................20
Table 10. Flow values corresponding to the velocity of 1 m/s............................................................20

EN.IO.PEM.500
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1. INTRODUCTION
The user manual covers the electromagnetic flowmeter PEM-500.
The manual contains data, tips and general recommendations for the safe installation and operation of
the flowmeter.
1.1. Trademarks
Modbus®is a registered trademark of SCHNEIDER AUTOMATION, INC.
2. SAFETY
−The installation and start-up of the device and any activities related to operation shall be
carried out after thorough examination of the contents of user manual and the instructions
related thereto.
−Installation and maintenance should be carried out by qualified staff having the required
authorizations to install electrical and measuring devices.
−The device shall be used according to its intended purpose in line with the permissible
parameters specified on the nameplate ➔Flowmeter identification.
−The protecting elements used by themanufacturer to ensure flowmeter safety may be less
effective if the device is operated in a manner not consistent with its intended purpose.
−Before installing or disassembling the device, it is absolutely necessary to disconnect it
from the power source.
−No repairs or alterations of the flowmeter electronic system are permitted. Assessment of
damage and possible repair may only be performed by the manufacturer or authorized
representative.
−Do not use instruments if damaged. In case of malfunction, the device must be put out of
operation.
3. TRANSPORT AND STORAGE
3.1. Delivery check
After receiving the delivery of the equipment, it is necessary to:
−make sure that the packaging and its contents were not damaged during transport;
−check the completeness and correctness of the received order, and make sure no parts are
missing.
3.2. Transport
Transport of flowmeters shall be carried out with the use of covered means of transport, in original
packages. The packaging shall be protected against movement and direct impact of atmospheric
factors.
3.3. Storage
Flowmeter shall be stored in an original packaging, in a room, without vapours and aggressive
substances, protected against mechanical impact. The temperature and relative humidity shall not
exceed the parameters specified in section ➔10.6.
The description of the flowmeter configuration is given in the configuration manual
EN.IK.PEM.500, whereas the Modbus®communication is described in the
MODBUS manual EN.IM.PEM.500.
These manuals are available on the manufacturer’s website www.aplisens.com.

EN.IO.PEM.500
Revision 01.A.001/2020.08 7
4. GUARANTEE
General terms and conditions of guarantee are available on the manufacturer’s website:
www.aplisens.com/ogolne_warunki_gwarancji
The guarantee shall be repealed if the device is used in against its intended use, failure to
comply with user’s manual or interference with the structure of the device.
5. IDENTIFICATION
5.1. Manufacturer’s address
APLISENS S.A.
03-192 Warsaw
Morelowa 7 St
Poland
5.2. Flowmeter identification
Figure 1. Nameplate of the PEM-500.
1. Logo and name of manufacturer.
2. CE mark.
3. QR product code.
4. Flowmeter type.
5. Flowmeter model ID.
6. Max/Min flow value.
7. Supply voltage values.
8. Output signal.
9. Flowmeter serial number.
10. IP rating.
11. Insulation lining material.
12. Material of electrodes.
13. A and B factor values.
14. Note about the obligation to read the manual.
15. Direction of fluid flow.
16. Manufacturer’s address.
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PL.IO.PEM.500
Edycja 01.A.001/2020.08 8
5.3. CE mark, declaration of conformity
The device has been designed to meet the highest safety standards, has been tested and has left the
factory in a condition that is safe for operation. The device complies with the applicable standards and
regulations listed in the EU Declaration of Conformity and has CE marking on nameplate.
6. CONSTRUCTION
6.1. Intended use and features
The electromagnetic flowmeter PEM-500 is designed for volumetric measurement of the flow rate of
conductive liquids in piping systems. It measures the flow and volume of the fluid flowing in both
directions. Complete filling of the sensor tube by the fluid is required for correct measurement.
The flowmeter can be used to measure the flow of clear liquids, suspensions, pulp, solutions of various
chemical aggressiveness. Lack of mechanical components ensures high durability of the instrument
even when measuring abrasive fluids.
The compact enclosure with IP67 rating (IP68 special design) allows to install the equipment buried
underground.
The transmitter converts the measuring signal coming from the measuring sensor to
4…20 [mA] signal and Modbus RTU/RS485.
The configuration and reading of the flowmeter parameters are done via the RS485 interface and
Modbus RTU protocol using a PC equipped with RS485/USB converter and Raport 2 or other software,
interfacing with the flowmeter registers according to the interface documentation. Any HMI panel
running as Modbus master can also be used to visualize data.
6.2. Design and overall dimensions
The electromagnetic flowmeter PEM-500 consists of a transmitter and a measuring sensor forming
a fixed assembly.
The transmitter enclosure is made of high pressure aluminum casting. The user has no access to the
part containing the electronics board.
Figure 2. Overall dimensions of the flowmeter transmitter.
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EN.IO.PEM.500
Revision 01.A.001/2020.08 9
The sensor enclosure is made of non-magnetic material, welded with flanges and a set of fastenings.
An insulating insert of the required properties is placed inside the tube (compatible with the type of
fluid). The system of electromagnet coils generating the required magnetic field is fixed directly on the
measuring tube.
A pair of electrodes positioned opposite to one another and passing through the measuring tube with
lining is made of acid resistant steel orother electrically conductive materials selected to fit the chemical
properties of the measured fluid. The flowmeter sensor has no internal mechanical components, which
ensures undisturbed flow of the measured fluid through the complete cross-section of the piping. The
flow measurement is independent of:
−fluid pressure;
−viscosity;
−density;
−temperature;
−electrical conductivity (above the minimum value).
Figure 3. Overall dimensions of the sensor.
Table 1. PN 16 sensor data.
Dimensions [mm]
Weight [kg]
DN
A
B
D1
D2
d
n
10
150 or 200
153
90
60
14
4
2,5
15
155
95
65
14
4
2,5
20
160
105
75
14
4
3
25
167
115
85
14
4
3,5
32
180
140
100
18
4
5
40
185
150
110
18
4
6
50
200
191
165
125
18
4
7
65
209
185
145
18
4
8
80
224
200
160
18
8
9,5
100
250
245
220
180
18
8
12
125
276
250
210
18
8
15
150
300
305
285
240
22
8
20
200
350
375
340
295
22
12
36
250
400
430
405
355
26
12
58

EN.IO.PEM.500
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Table 2. PN 25 sensor data.
Dimensions [mm]
Weight [kg]
DN
A
B
D1
D2
d
n
10
150 or 200
153
90
60
14
4
2,5
15
155
95
65
14
4
2,5
20
160
105
75
14
4
3
25
167
115
85
14
4
3,5
32
180
140
100
18
4
5
40
185
150
110
18
4
6
50
200
191
165
125
18
4
7
65
209
185
145
18
4
8
80
224
200
160
18
8
9,5
100
250
245
235
190
22
8
12
125
276
270
220
26
8
15
150
300
305
300
250
26
8
20
200
350
375
360
310
26
12
36
250
400
430
425
370
30
12
58
Table 3. PN 40 sensor data.
Dimensions [mm]
Weight [kg]
DN
A
B
D1
D2
d
n
10
150 or 200
153
90
60
14
4
2,5
15
155
95
65
14
4
2,5
20
160
105
75
14
4
3
25
167
115
85
14
4
3,5
32
180
140
100
18
4
5
40
185
150
110
18
4
6
50
200
191
165
125
18
4
7
65
209
185
145
18
4
8
80
224
200
160
18
8
9,5
100
250
245
235
190
22
8
12
125
276
270
220
26
8
15
150
300
305
300
250
26
8
20
200
350
375
375
320
30
12
36
250
400
430
450
385
33
12
58
6.2.1. Electrodes
The material of the electrodes of the flow sensor has to be selected to correspond with its chemical
resistance to the fluid in which the electrodes will be immersed.
Cleanliness of electrodes can affect the precision of the measurement and the accumulation of dirt can
affect the measuring process (liquid isolation). Cleaning details are specified in section ➔11.3.

EN.IO.PEM.500
Revision 01.A.001/2020.08 11
7. INSTALLATION
7.1. General recommendations
−It is recommended that the flow direction matches the direction of the arrowon the sensor;
the transmitter is set by default to operate in that direction. It is possible to reverse the flow
direction on the instrument in operation, but then the flow direction must also be changed
in transmitter parameters.
−Before installation, check if there is enough space to install the flowmeter at the flange
using the bolts and nuts available.
−During the measurement, the entire space inside the sensor should be filled with the
measured liquid.
−Secure the piping system in place on both sides of the flowmeter to prevent the vibrations
and deflections of the system from affecting the measurement.
−If the flowmeter is installed on a pipeline with a larger internal diameter, a reducer must
be used to ensure alignment upon installation without any stress increase in sensor piping
and flanges.
−During installation, ensure there are straight sections with a nominal diameter matching
the nominal diameter of the sensor (DN) with the minimum length of: 5DN upstream and
3DN downstream the sensor.
−When installing the sensor on an insulated pipe (e.g. glass, plastic, etc.), ground the
complete system with earthing rings connected to the sensor ground terminal ➔Figure
6.
−A conductive connection between the sensor ground (enclosure) and the liquid is
necessary for proper measurement.
−During installation, it is necessary to install a seal between the sensor piping flanges.
If earthing rings are used, the seal must be inserted on both sides of the ring.
−Do not use gaskets made of hard materials as they may damage the Teflon lining or, in
the case of rubber lining, not ensure sufficient tightness of the installation.
−Make sure that no sealing element enters the lumen of the pipeline as this may introduce
turbulence into the flow and disrupt the operation of the flowmeter.
7.2. Recommended assembly method for the sensor
Figure 4. Recommended installation of the sensor.
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EN.IO.PEM.500
12 Revision 01.A.001/2020.08
In order to avoid metrological errors caused by air bubbles or lining damage, the following points must
be observed:
- during installation, the sensor must be properly positioned, the flange bolts must be
tightened simultaneously on both sides;
- it is recommended that the flowmeter be installed so that the axis of the electrodes is
as horizontally as possible as shown by the examples in ➔Figure 5;
- Teflon lining needs special attention during operation and installation. During installation
(operation) excessive vacuum in the piping should be avoided. Do not damage the lining
edges extending to the outer flange surfaces on both sides of the sensor. Some sensors
are factory supplied with special coversto prevent deformation of the Teflon lining. Covers
should be removed immediately before installation, before inserting between the counter-
flanges;
- ensure that no sealing element protrudes into the piping passage as this can cause
turbulence of the flow and disturb the flowmeter operation.

PL.IO.PEM.500
13 Edycja 01.A.001/2020.08
7.3. Installation of the PEM-500 flowmeter
Figure 5. Installation of the PEM-500 flowmeter –examples.
It is recommended to install the flowmeter in the horizontal (A) position (it is possible
to deviate from the horizontal plane by approx. 30° (B)) and in the vertical (C) position –
according tothe examples presentedin Fig. 5. Otherwise, it ispossible to generate an empty
pipe detection alarm when there is air in the system (one of the electrodes is not immersed).

EN.IO.PEM.500
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8. ELECTRICAL CONNECTION
All connection and installation operations must be performed with supply voltage and
other external voltages (if used) disconnected. A circuit breaker must be installed next
the flowmeter transmitter (in the same room) on the flowmeter feeding line. It must
be easily accessible and clearly and unambiguously marked with symbols compliant
with local electrical equipment safety regulations.
The user has no access to the part containing the electronics board.
The electrical connection of the flowmeter is made with the pre-installed cables with leads marked,
depending on the type of cable used, by colours or numbers. The designation and numbering of
conductors is shown in Table 4.
The number of cables depends on the selected power supply option of the flowmeter. The version with
mains power supply has two cables —signal and power supply, and the low voltage version has one
cable for power supply and signaling. As a standard, the flowmeter is equipped with 3-metre long cable.
Table 4. Marking of power and signal conductors for the low voltage version (24 V).
Wire colour
Wire number **
Description
Power supply
Blue
3
Power
supply
(-)
Low voltage
power supply DC
Brown
4
(+)
2-state output
Transparent
10
Any polarity, galvanic isolated
passive
Gray
5
Output
pulse / frequency
Pink
8
Any polarity, galvanic isolated
passive
Violet
7
Analog output, active 4÷20 mA
Red
6
(+)
Active/passive
(normally active)
Black
2
(-)
Communication
Black-white
12
RS485 A
Blue-white
13
RS485 B
White
1
RS485
GND
2-state input passive
Orange
9
Any polarity, galvanic isolated
Beige
11
Functional grounding
Yellow-green
0
Connected internally to the housing
** If a cable with numbered conductors is used, the table numbering according to VDE 0293 shall apply.
The high-voltage version is equipped with two cables:
−power supply (3-wire);
−signal (14-wire).
Table 5. Marking of power conductors for the high-voltage version (230 V).
Wire colour
Description
3 wire cable
Blue
N
Mains supply
Brown
L
Yellow-green
Protective
grounding
Connected
internally of the
housing

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Revision 01.A.001/2020.08 15
Table 6. Marking of signal conductors for the high-voltage version (230 V).
Wire colour
Wire number**
Description
-
Blue
3
Not used in high voltage version
Brown
4
2-state output
Transparent
10
Any polarity, galvanic isolated
passive
Gray
5
Output
pulse / frequency
Pink
8
Any polarity, galvanic isolated
passive
Violet
7
Analog output, active 4÷20 mA
Red
6
(+)
Active/passive
(normally active)
Black
2
(-)
Communication
Black-white
12
RS485 A
Blue-white
13
RS485 B
White
1
RS485
GND
2-state input passive
Orange
9
Any polarity, galvanic isolated
Beige
11
-
Yellow-green
0
Not used in high voltage version
** If a cable with numbered conductors is used, the table numbering according to VDE 0293 shall
apply.
When connecting the flowmeter to the electrical power supply, you must observe the following rules
regarding:
−connections of electrical equipment;
−protections against electric shock;
−principles of safe operation of electrical systems by personnel.
The electrical protection of the device allows it to be operated in different environments and,
in consultation with the manufacturer, further modifications are possible to enable operation
under user-specific environmental conditions. The output wiring from the transmitter cannot be
routed next to power cables or other cables that may cause disturbance.
The equipment interoperating with the flowmeter has to be resistant to electromagnetic
disturbance generated in the surroundings in accordance with the compatibility requirements
applicable at the place of installation.

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8.1. Grounding
The flowmeter has to be earthed according to the rules applicable at the place
of installation.
Lack of functional earthing may cause significant disturbances of measurements.
Designation of the point of connection of the functional earthing on the flowmeter.
Protective grounding for high voltage version (230 V) as indicated in ➔Table 5.
Figure 6. Example of functional earthing connection for metallic (A) piping and for insulated piping using
earthing rings (B).
Connection elements according to the installation
order:
1. Nut M6.
2. Conductor terminated with M6 terminal lug.
3. Toothed washer acc. DIN 6797 J –M6.
4. Spring washer M6.
5. Nut M6.
Figure 7. Connection of the functional earthing to the sensor enclosure.
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9. START-UP
After the installation and electrical connection of the flowmeter, the installation and connections must
be checked as follows:
−crimp all cable connections, terminals and plugs in all connectors and verify the earthing
connection;
−verify the correct power supply according to the information on the equipment nameplate;
−verify the protection of the system against electric shock;
−check if the flowmeter is correctly installed in the piping (no clearances, gaps);
−if no defects and damage is detected in the system, fill the piping with liquid and verify its
tightness. After short flushing, power cycle the system —on-off-on and start the
measurement.
The description of the device configuration is given in the manual EN.IK.PEM.500, whereas
the Modbus®communication is described in the manual EN.IM.PEM.500. The
documentation is available on the manufacturer's website at www.aplisens.com.
10. TECHNICAL PARAMETERS
10.1.Electrical connections
10.1.1. Output signals
Analog output
Active or passive (special execution)
4 …20 mA/500 Ω
Pulse/frequency output
Passive
Max. 24 V/10 mA DC, any polarity
0,1 … 2000 Hz in frequency mode
do 500 Hz in pulse mode
galvanic isolated
2-state output OC
quantity: 1, open collector
Max. 35 V DC/100 mA
Galvanic isolated
Any polarity
Communication output
Modbus RTU/RS485
Galvanic isolated
10.1.2. Power supply
Standard variant
Mains supply
90-260 V AC 50 Hz 15 VA
Optional variant
Low voltage supply
10-36 V DC 15 W
Power input protected against reverse
voltage polarity.
10.2.Protection class
The device has class I protection; it is equipped with protective terminal to which you should connect
protective conductor. Measuring circuits (to sensor) are separated from hazardous voltages with
reinforced insulation according to the requirements of PN-EN 61010-1.
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EN.IO.PEM.500
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10.3.Technical parameters
10.3.1. Technical specifications
Table 7. Technical data od PEM-500 flowmeter.
10.4.Reference conditions
Flow
0,3 –10 m/s
Measured medium
Water 10 –30ºC
Conductivity
> 300 µS/cm
Supply variability
Un ± 2% (Un – supply voltage)
Ambient temperature
18 - 25ºC, constant humidity
Stabilization time after switching
on the power supply
Minimum 20 min
Straight sections of flow
5 diameters upstream the sensor, 3 diameters downstream
the sensor
Measuring sensor
Connected with transmitter, centrally located
NOTE! Reference conditions generally contain reference values or reference ranges for values
affecting the flow meter.
Technical data
Minimum fluid conductivity 5 µS/cm
Nominal diameters DN 10…250, (ANSI 0.5”…10”)
Input resistance 1010 
Maximum pressure Standard 1.6 MPa (2.5 MPa, 4 MPa)
Basic error* 0.5% of the reading value for 20…100% Qmax
Process connections DIN flanges (ANSI, BS)
Isolating lining Hard rubber DN20…250
Teflon DN10…250
Small flows cut-off level adjustable value
Momentary flow 2-way flow (l/s, m3/h, m3/s and others)
Fluid temperature for lining Rubber: -5…90C
Teflon: -25…90C
Volume balance 3 counters: total, positive, negative (m3, l and others)
Low flow alarm Adjustable, any value
Electrodes 316L steel –rubber-lining design
316L, Hastelloy, Tantalum –Teflon-lining design
Configuration RS485 and Modbus RTU protocol
Empty pipe detection Periodic, programmable
Sensor pipe acid resistant steel
Analogue outputs 4…20 mA/500 
Active output (passive –special design)
Outer enclosure and flanges Carbon steel
(steel 304, steel 321)
Pulse/frequency Output max. 24 V / 10 mA DC;
0.1…2000 Hz in frequency mode;
up to 500 Hz in pulse mode
passive output, galvanic isolation; any polarity
Anti-corrosion protection Acrymetal varnish
Accessories Stainless steel earthing rings
for plastic pipes
Binary OC output open manifold
Max. 35 V DC / 100 mA
galvanic isolation;
any polarity
Excitation coil power supply From the transmitter
Excitation coil insulation class E
Optional sensor design acid resistant steel
hygienic connections
Communication output Modbus RTU/ RS485
Galvanic isolation
Weight 0.5 kg (transmitter weight)
+ Weight acc. to table 1, 2, 3 “Sensor mechanical data”
Power supply mains: 90…260 V AC / 50 Hz / 15 VA
low voltage with protection against
inverse voltage polarity: 10…36 V DC / 15 W
Power cable (with mains power supply) 3 m
Signal cable (with mains power supply) 3 m
Power and signal cable
(low voltage version) 3 m
Other cable lengths –upon request
Protection rating IP67 (IP68)

EN.IO.PEM.500
Revision 01.A.001/2020.08 19
10.5.Metrological parameters
10.5.1. Standard measuring ranges
PEM-500 flowmeters are available in the size ranges of flange connections specified by the DIN
standard within the range DN10 ÷ DN250 or optionally can be executed in the size range of flange
connections in accordance to the ANSI, BS standard.
Standard flow values Qmax for the individual versions of the flowmeters with flange connections in
accordance with DIN in the range DN10 ÷ DN250 are presented in the table below. It is possible to set
the other Qmax flow values for the individual versions of the flowmeters greater than twice the standard
value of measuring range.
Table 8. Flow values for the PEM-500 flowmeter.
Flow values
DN acc.
to DIN
Recommended limit
flow values
Factory settings
~Q(min)
~Q(max)
Analog output
4…20 mA
Pulse output
Low flow
cut-off
(v~0,1 [m/s])
Measuring
range
Linear flow
velocity (to the
end of
measuring
range)
Volume /
pulse
Number of
pulses / m3
[m3/h]
[m3/h]
[m3/h]
[m/s]
[m3/pulse]
[m3/h]
10
0,08
2,8
0÷1
3,54
0,0000025
400000
0,03
15
0,19
6,4
0÷2
3,14
0,000005
200000
0,06
20
0,34
11
0÷4
3,54
0,00001
100000
0,12
25
0,5
18
0÷5
2,83
0,0000125
80000
0,15
32
0,9
29
0÷10
3,45
0,00004
40000
0,3
40
1,4
45
0÷15
3,32
0,00005
25000
0,45
50
2,1
71
0÷20
2,83
0,0001
20000
0,6
65
3,6
119
0÷30
2,51
0,000125
10000
0,9
80
5
181
0÷50
2,76
0,00025
8000
1,5
100
8
283
0÷100
3,54
0,0004
4000
3
125
13
442
0÷150
3,40
0,0005
2500
4,5
150
19
636
0÷200
3,14
0,001
2000
6
200
34
1131
0÷360
3,18
0,00125
1000
10,8
250
53
1767
0÷500
2,83
0,002
800
15

EN.IO.PEM.500
20 Revision 01.A.001/2020.08
10.5.2. Table od volumetric flows calculated for characteristic fluid flow velocities for
flanged execution acc. to DIN.
The volumetric flow is calculated from the measured linear velocity of the flow and the geometry of the
flowmeter cross-section. The table shows the values of volume flow for individual DNs at characteristic
linear flow speeds.
Table 9. Volume flow versus fluid linear velocity.
DN
Flow velocity V [m/s]
0,300
1,000
2,000
3,000
4,000
5,000
6,000
Flow
[m3/h]
10
0,085
0,283
0,565
0,848
1,131
1,414
1,696
15
0,191
0,636
1,272
1,909
2,545
3,181
3,817
20
0,339
1,131
2,262
3,393
4,524
5,655
6,786
25
0,530
1,767
3,534
5,301
7,069
8,836
10,603
32
0,869
2,895
5,791
8,686
11,581
14,476
17,372
40
1,357
4,524
9,048
13,572
18,096
22,619
27,143
50
2,121
7,069
14,137
21,206
28,274
35,343
42,411
65
3,584
11,946
23,892
35,838
47,784
59,729
71,675
80
5,429
18,096
36,191
54,287
72,382
90,478
108,573
100
8,482
28,274
56,549
84,823
113,097
141,372
169,646
125
13,254
44,179
88,357
132,536
176,714
220,893
265,072
150
19,085
63,617
127,234
190,852
254,469
318,086
381,703
200
33,929
113,097
226,194
339,292
452,389
565,486
678,583
250
53,014
176,714
353,429
530,143
706,858
883,572
1060,287
Table 10. Flow values corresponding to the velocity of 1 m/s.
Flow values corresponding to the velocity 1 m/s
DN
m3/h
l/min.
l/s
10
0,283
4,712
0,079
15
0,637
10,62
0,177
20
1,131
18,85
0,314
25
1,767
29,452
0,491
32
2,895
48,255
0,804
40
4,524
75,398
1,257
50
7,069
117,81
1,964
65
11,946
199,1
3,318
80
18,096
301,59
5,027
100
28,274
471,23
7,854
125
44,179
736,31
12,272
150
63,617
1060,3
17,671
200
113,10
1885
31,42
250
176,71
2945,2
49,087