PKP DB50 User manual

Instruction Manual
DB50
Thermal Mass Flow Meter and Counter
for compressed air and non aggressive gases
PKP Prozessmesstechnik GmbH
Borsigstraße 24
D-65205 Wiesbaden- ordenstadt
Tel.: ++49-(0)6122-7055-0
Fax: ++49-(0)6122-7055-50
Email: [e-mail]

Foreword
DB50 English V1.18
Seite 2
I. Foreword
Dear customer,
thank you very much for deciding in favour of the DB50. Please read this
installation and operation manual carefully before mounting and initiating the device
and follow our advice. A riskless operation and a correct functioning of the DB50
are only guaranteed in case of careful observation of the described
instructions and notes.
PKP Prozessmesstechnik
Borsigstraße 24
D-65205 Wiesbaden-Nordenstadt
Tel.: [phone]
Fax.: [phone]
Mail: [email protected]
Web: www.pkp.de

Table of Content
DB50 English V1.18 Seite 3
II. Table of content
I. Foreword ....................................................................................................................... 2
II. Table of content......................................................................................................... 3
1Safety instructions........................................................................................................ 5
2Instruments description ............................................................................................... 8
3Technical data............................................................................................................... 9
4Installation....................................................................................................................10
4.1 Pipe/tube requirements ....................................................................................................... 10
4.2 Inlet / outlet runs .................................................................................................................. 10
4.3 Installation DB50 .................................................................................................................. 11
4.3.1 ½“ welded nipple with ball valve ½“ ................................................................................. 11
4.3.2 Spot drilling collar with ball valve..................................................................................... 11
4.4 Installation of the Sensor .................................................................................................... 12
4.4.1 Mounting DB50 onto the ball valve .................................................................................. 12
4.5 Display Head Position ......................................................................................................... 12
5Measuring ranges........................................................................................................13
5.1 Maximum Flow Ranges „Low Speed“................................................................................ 14
5.2 Maximum Flow Ranges „Standard“ ................................................................................... 16
5.3 Maximum Flow ranges „Max speed“ ................................................................................. 18
5.4 Maximum Flow ranges „High speed“ ................................................................................ 20
6Dimension ....................................................................................................................22
7Electrical wiring ...........................................................................................................23
7.1 Modbus RTU, 4..20mA, Pulse or MBus.............................................................................. 23
7.2 Ethernet (optional PoE) ...................................................................................................... 24

Table of Content
DB50 English V1.18
Seite 4
8Operation......................................................................................................................25
8.1 Initialization .......................................................................................................................... 26
8.2 Main menu ............................................................................................................................ 26
8.3 Settings ................................................................................................................................. 27
8.3.1 Sensor Setup ................................................................................................................... 28
8.3.1.1 Input / change tube diameter.................................................................................... 28
8.3.1.2 Input / change consumption counter ........................................................................ 29
8.3.1.3 Definition of the units for flow, velocity, temperature and pressure ......................... 29
8.3.1.4 Definition of the reference conditions ....................................................................... 30
8.3.1.5 Setting of Zeropoint and Low-flow cut off................................................................. 32
8.3.2 Modbus Settings .............................................................................................................. 33
8.3.2.1 Modbus RTU Setup.................................................................................................. 33
8.3.2.2 Modbus TCP (Optional)............................................................................................ 34
8.3.2.2.1 Network Setup DHCP........................................................................................... 34
8.3.2.2.2 Network Settings static IP..................................................................................... 35
8.3.2.2.3 Modbus TCP Settings........................................................................................... 36
8.3.2.3 Modbus Settings Register (2001…2005) ............................................................... 37
8.3.2.4 Values Register (1001 …1500) ................................................................................ 37
8.3.3 Pulse /Alarm..................................................................................................................... 39
8.3.3.1 Pulse output.............................................................................................................. 39
8.3.4 User Setup....................................................................................................................... 40
8.3.4.1 Password.................................................................................................................. 40
8.3.4.2 Language.................................................................................................................. 40
8.3.4.3 Display / Touch......................................................................................................... 41
8.3.5 Advanced......................................................................................................................... 41
8.3.6 4 -20mA ........................................................................................................................... 42
8.3.7 DB50 Info ......................................................................................................................... 44
8.4 MBus...................................................................................................................................... 45
8.4.1 Default Settings communication ...................................................................................... 45
8.4.2 Default values transmitted ............................................................................................... 45
9Status / Error messages..............................................................................................46
9.1 Status messages.................................................................................................................. 46
9.2 Error messages.................................................................................................................... 47
Low Voltage............................................................................................................................... 47
Heater Error............................................................................................................................... 47
Internal Error............................................................................................................................. 47
Temp out of Range................................................................................................................... 47
10 Maintenance..............................................................................................................48
11 Cleaning of the sensor head....................................................................................48
12 Re-Calibration...........................................................................................................48
13 Spare parts and repair..............................................................................................48
14 Calibration.................................................................................................................48
15 Warranty....................................................................................................................48

Safety Instructions
DB50 English V1.18 Seite 5
1 Safety instructions
Please read carefully before starting the device!
Warning:
Do not exceed the pressure range of 50 bar.
Over 10 bar we recommend using the high-pressure protection for a safe installation and removal.
Observe the measuring ranges of the sensor!
Overheating destroys the sensor.
Observe the admissible storage and transportation temperature as well as the permitted operating
temperature (e.g. protect the instrument from direct insolation).
Always observe the direction of flow when positioning the sensor!
The safety ring at the sensor head must always remain undamaged and sit correctly in the destined
slot.
The screwed fixture must be pressure tight.
The adapter sleeve must be tightened with a torque of 20 to 30 Nm.
It is necessary to avoid condensation on the sensor element or water drops in the measuring air as
they may cause faulty.
The values of the inlet and outlet sections must not fall below the specified minimum values as this
causes increased deviations in the measuring results.
The manufacturer cannot be held liable for any damage that occurs because of non-observance or
non-compliance with these instructions. Should the device be tampered with in any matter other than a
procedure, which is described and specified in the manual, the warranty is cancelled and the
manufacturer is exempt from liability.
The device is destined exclusively for the described application.
PKP offers no guarantee for the suitability for any other purpose and is not liable for
errors that may have slipped into this operation manual. PKP is also not liable for
consequential damage resulting from the delivery, capability or use of this device.
We offer you to take back the instruments of the instruments family DB50 which you would like to
dispose of.
Qualified employees from the measurement and control technology branch should only carry out
adjustments and calibrations.
!

Safety Instructions
DB50 English V1.18
Seite 6 von 52
Please read carefully before starting the device!
The consumption sensor DB50 works according to the calorimetric measuring principle.
Burnable gases
If this consumption sensor is used for measurement of burnable gases (e.g. natural gas) we
explicitly point out that the sensor has no DVGW (= German Technical Association for Gas
and Water) admission, however, it can be used for natural gas.
A DVGW admission is not mandatory.
The consumption sensor DB50 corresponds with the latest state of technology and can
generally be used for burnable and non-burnable gases.
For the use in e.g. natural gas, the sensor will be calibrated in natural gas. The calibration
protocol (inspection certificate) is included in the scope of delivery.
The area outside the pipe (environment of the sensor) is not allowed to be an explosive
area (Ex-area)
.
The installation has to be done by authorized expert staff.
!

Safety Instructions
DB50 English V1.18
Seite 7
Please read carefully before starting the device!
The consumption sensor DB50 measures the flow velocity (calorimetric principle) in the
center of the pipe. Please observe mounting instruction and inlet section = 15 x inner
diameter and outlet section = 5 x inner diameter.
The final values of the measuring ranges are as follows:
DB50 standard version 92.7 m/s, please take the flow rates from the tables on pages 14-15
DB50 max. version 185 m/s, please take the flow rates from the tables on pages 16-17
DB50 high speed version 224 m/s, please take the flow rates from the tables on pages 18-19
1. DB50 with Display with 4… 20 mA analogue- and pulse output
Please enter inner diameter of the pipe!
Values indicated in the display:
Actual value in m³/h, m³/min etc.
Counter in m³, l, cf
as well as pulse output, 1 pulse per m³, l, cf
are calculated according to the set diameter. Please take the analogue value for flow rate
4. 20 mA from the tables on pages 14 to 19
4 mA always corresponds with the starting value 0 m³/h, 0 m³/min. The final value 20 mA can be taken
from the tables on pages 14 to 19.
Example DB50 Standard:
1" with inner diameter 25.0 mm, 4 mA = 0 m³/h and 20 mA = 122.2 m³/h
2" with inner diameter 53.1 mm, 4 mA = 0 m³/h und 20 mA = 600.0 m³/h
2. DB50 without Display with 4… 20 mA analogue- and pulse output
No adjustments are necessary at the consumption sensor.
The respective final values for the flow rate can be taken from the tables on the pages 14 to 19.
Analogue start value 4 mA is always set as scaling value 0 m³/h, 0 m³/min etc.
Analogue end value 20 mA is the final value, see tables pages 14 -19.
Example DB50 Standard:
1" with inner diameter 25.0 mm, 4 mA = 0 m³/h and 20 mA = 122.2 m³/h
2" with inner diameter 53.1 mm, 4 mA = 0 m³/h und 20 mA = 600.0 m³/h
!

Instruments description
DB50 English V1.18 Seite 8
2Instruments description
The DB50 is a compact consumption counter for compressed air and gases.
Special features:
- Optimum accuracy due to compact design
- Intgrated Display showing Flow, consuption, velocity and temperature
- Input inner tube diameter via display keys
- Units free selectable. m³/h, m³/min, l/min, l/s, kg/h, kg/min, kg/s, cfm
- Modbus RTU (RS485) Interface
- Analogoutput 4..20mA
- Pulse output galv. isolated.

Technical data
DB50 English V1.18 Seite 9
3Technical data
Measurement: Flow, Consumption and Velocity
Reference: Standard settings ex works:
DIN 1945, ISO 1217 at 20°C and 1000 mbar
other standards can be adjusted by Display keys (optional)
Selectable Units: m³/h (Standard settings ex- factory)
m³/min, l/min, l/s, ft/min, cfm, m/s, kg/h, kg/min, kg/s, °C, °F
Measuring principle: calorimetric measurement
Sensor: Pt45, Pt1000
Measuring medium: Air, gases
Operating temperature: -20 ... 70°C housing
-30 ... 100°C probe tube
Relative humidity for
measuring medium: < 95 % r.H (no condensation on the sensor element allowed)
Operating pressure: up to 50 bar
Power supply: 18 to 36 VDC
Power consumption: max. 5W
Digital output: RS 485 (Modbus RTU)
Analog output: 4...20 mA (see tables page 13 -18),
max. burden < 500 Ohm
Pulse output: pulse output potential free (dry contact)
passive: max. 48Vdc, 150mA
1 pulse pro m³ resp. pro l,
Valency adjustable with the display keys
Accuracy: ± 1,5 % m.v.*, ± 0,3 % f.s.*
Display: optional TFT 1.8“ Resolution 220 x 176
Mounting thread: G ½“, optional ½” NPT
Material: Stainless steel 1.4301 / 1.4404
Protection class IP65
‘* m.v. = measured values
f.s. = full scale

Installation
DB50 English V1.18 Seite 10
4 Installation
4.1 Pipe/tube requirements
Correctly sized gaskets
Correct aligned flanges and gaskets
Diameter mismatch at the pipe junctions should be avoided but must be less than 1mm. For
further information see ISO 14511
Ensure clean pipes after installation
.
4.2 Inlet / outlet runs
In order to maintain the accuracy stipulated in the data sheets, the sensor must be inserted in the
centre of a straight pip e section with an undisturbed flow progression.
An undisturbed flow progression is achieved if the sections in front of the sensor (inlet) and behind the
sensor (outlet) are sufficiently long, straight and without any obstructions such as edges, seams,
curves etc.
Therefore, it is necessary to ensure the recommended inlet and outlet runs.
Table Inlet / Outlet runs
Flow obstruction before the measurement
section
Min length
Inlet run (L1)
Min length
Outlet run (L2)
Slight curve
(elbow < 90°)
12 x D
5 x D
Reduction
(Pipe narrows to the measurement section)
15 x D
5 x D
Expansion
(Pipe expands to the measurement section)
15 x D
5 x D
90° elbow or T-piece
15 x D
5 x D
2x elbow á 90°
in einer Ebene
20 x D
5 x D
2x elbow á 90°
3-dimensional
35 x D
5 x D
Control valve
45 x D
5 x D
15 x D 5 x D
15 x D 5 x D15 x D
15 x D 5 x D
20 x D 5 x D
35 x D 5 x D
5 x D45 x D
The values represent the min. lengths. In case the min. inlet / outlet runs could not be ensured, it must
be expected to get increased or significant deviations of the measurement values.

Installation
DB50 English V1.18
Seite 11
4.3 Installation DB50
The installation of the sensor is done via a ball valve ½ ".
If no valid measuring point with a ball valve ½ " is available there are following ways to set up a
measuring point.
4.3.1 ½“ welded nipple with ball valve ½“
4.3.2 Spot drilling collar with ball valve
In case the system could not be shut down, means to be set depressurized, there could be used the optional
spot drilling collar and drilling jig to drill through the ball valve.
Important:
Ensure that the system is in shut down, ie. depressurized.
Note for installation with ball valve
Ball valve R 1/2“, DN 15
Passage ball valve: Minimum Ø15 mm

Installation
DB50 English V1.18
Seite 12
4.4 Installation of the Sensor
4.4.1 Mounting DB50 onto the ball valve
Assembly is carried out by inserting the connection thread with gasket. (G1/2“
thread, SW 32) into the ball valve with ½"internal thread.
The sensor has be tighten by hand as far as possible and then tighten with
stipulated torque of 25-30 Nm.
It must be ensured that the installation is pressure-tight.
The sensor is then inserted to the required immersion depth (sensor tip in the
middle of pipe) and aligned according to the direction of the airflow.
A depth scale engraved on the probe tube, a flow alignment arrow and an
aligning device will be of help for you.
Once the sensor has been aligned the adapter sleeve must be tighten with
stipulated torque of 20-30Nm (SW 17).
Attention: Alignment of the sensor must not be modified when tightening the connection thread and
adapter sleeve. In this case, please check the immersion depth and alignment again and
correct it if necessary. The angular deviation should not be greater than 2° in relation to
ideal position as otherwise the measuring accuracy will decrease.
Calculation mounting depth: Alignment flow direction
Mounting depth = X + Y
dA = outer diameter
X = dA / 2
y
dA
x
160
170
180
Installation depth
Engraved depth scale for
accurate installation
Safety ring
Adapter sleeve
Connection thread
4.5 Display Head Position
The Position of the Display head is twistable by 180 e.g. in
case of reverse flow direction.
For this purpose the 6 fastening screws are to be released
and the display head rotated 180°.
Caution:
It must be ensured that the connection plugs are still plugged
and the gasket is installed correctly.
Fastening screws
Indication flow direction

Measuring ranges
DB50 English V1.18 Seite 13
5Measuring ranges
The consumption sensor VA500 is available in 4 different versions:
Low Speed max. measuring range of 50 m/s
Standard max. measuring range of 92,7 m/s
Max–Version max. measuring range of 185.0 m/s
High speed–Version max. measuring range of 224 m/s
The sensors are programmed to pipe inner diameter of 53,1 mm.
Measuring range Analogoue output Scaling
Low Speed 0… 323,6 m³/h 4mA = 0 m³h, 20mA = 323,6 m³/h
Standard 0 … 600 m³/h 4mA = 0 m³h, 20mA = 600 m³/h
Max–Version 0 ... 1197,59 m³/h 4mA = 0 m³h, 20mA = 1197,59 m³/h
Highspeed–Version 0 … 1450,06 m³/h 4mA = 0 m³h, 20mA = 1450,06 m³/h
In case of use in other inner pipe diameter the diameter, using the display version, the diameter has to be
set first.
The corresponding scale values for the respective version could be found in sections 5.1 to 5.3.
Example:
Pipe 1“, Inner diameter 25mm
Measuring range Analogoue output Scaling
Low Speed 0 … 65,9 m³/h 4mA = 0 m³h, 20mA = 65,9 m³/h
Grundversion( Standard) 0 … 122,2 m³/h 4mA = 0 m³h, 20mA = 122,2 m³/h
Max–Version 0 ... 243,88 m³/h 4mA = 0 m³h, 20mA = 243,88 m³/h
Highspeed–Version 0 … 295,30 m³/h 4mA = 0 m³h, 20mA = 295,30 m³/h
For changing the inner pipe diameter and adjusting the 4…20mA scaling, please refer to chapter
“Operation”.
Please note:
The consumption sensor400 corresponds with the latest state of technology and can
generally be used for burnable and non-burnable gases.
If this consumption sensor is used for measurement of burnable gases (e.g. natural gas) we explicitly
point out that the sensor has no DVGW admission, however, it can be used for
burnable gases. A DVGW admission is not mandatory.
For the use in e.g. natural gas, the sensor will be calibrated in natural gas. The calibration protocol
(inspection certificate) is included in the scope of delivery.
The area outside the pipe (environment of the sensor) is not allowed to be an explosive area. (Ex area) .

Measuring ranges
DB50 English V1.18
Seite 14
5.1 Maximum Flow Ranges „Low Speed“
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural
gas3)
Methan
m/s
1/4"
6,0
2,5
2,3
4,0
2,5
2,3
2,4
2,5
1,5
50
10,0
8,1
7,4
12,6
8,0
7,4
7,7
7,9
4,8
50
15,0
21,0
19,3
32,8
20,8
19,3
20,0
20,6
12,4
50
1/2"
16,1
24,6
22,6
38,4
24,3
22,6
23,4
24,1
14,6
50
3/4"
21,7
48,1
44,2
75,1
47,6
44,2
45,8
47,1
28,4
50
1"
25,0
65,9
60,6
103,1
65,2
60,6
62,8
64,6
39,0
50
26,0
71,7
65,9
112,1
70,9
65,9
68,3
70,3
42,4
50
27,3
79,7
73,2
124,5
78,8
73,2
75,9
78,1
47,1
50
28,5
87,4
80,4
136,6
86,5
80,4
83,3
85,7
51,7
50
30,0
97,6
89,7
152,6
96,6
89,7
93,0
95,7
57,7
50
1 1/4"
32,8
118,0
108,5
184,5
116,8
108,5
112,5
115,8
69,8
50
36,0
143,6
132,1
224,6
142,1
132,1
136,9
140,9
85,0
50
36,3
146,2
134,5
228,6
144,7
134,5
139,4
143,4
86,5
50
1 1/2"
39,3
172,9
159,0
270,4
171,1
159,0
164,9
169,6
102,3
50
40,0
179,4
164,9
280,4
177,5
164,9
171,0
175,9
106,1
50
41,9
196,9
181,0
307,8
194,8
181,0
187,7
193,1
116,5
50
43,1
210,1
193,2
328,5
207,9
193,2
200,3
206,1
124,3
50
45,8
238,4
219,3
372,8
235,9
219,3
227,3
233,8
141,1
50
2"
50,0
286,3
263,3
447,6
283,3
263,3
272,9
280,8
169,4
50
51,2
300,6
276,4
469,9
297,4
276,4
286,5
294,8
177,9
50
53,1
323,7
297,6
506,1
320,3
297,6
308,6
317,5
191,5
50
54,5
341,4
313,9
533,8
337,8
313,9
325,5
334,8
202,0
50
57,5
403,1
370,7
630,3
399,0
370,7
384,4
395,4
238,6
50
60,0
417,3
383,8
652,5
413,0
383,8
397,9
409,3
247,0
50
64,2
479,5
441,0
749,8
474,6
441,0
457,2
470,3
283,8
50
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring ranges
DB50 English V1.18
Seite 15
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air 2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural gas3)
Methan
m/s
2 1/2"
65,0
492,2
452,6
769,5
487,1
452,6
469,2
482,7
291,2
50
70,3
577,8
531,3
903,4
571,8
531,3
550,9
566,7
341,9
50
71,1
591,0
543,5
924,1
584,9
543,5
563,5
579,7
349,7
50
76,1
678,7
624,1
1061,2
671,7
624,1
647,1
665,7
401,6
50
3"
80,0
751,9
691,4
1175,5
744,1
691,4
716,8
737,4
444,9
50
82,5
799,6
735,3
1250,2
791,3
735,3
762,3
784,2
473,2
50
84,9
846,8
778,7
1324,0
838,0
778,7
807,3
830,5
501,1
50
90,0
952,7
876,1
1489,6
942,8
876,1
908,3
934,4
563,8
50
4"
100,0
1177,6
1082,9
1841,2
1165,4
1082,9
1122,7
1155,0
696,9
50
107,1
1352,4
1243,7
2114,5
1338,4
1243,7
1289,4
1326,4
800,3
50
110,0
1426,6
1311,9
2230,5
1411,8
1311,9
1360,2
1399,2
844,2
50
5"
125,0
1844,5
1696,1
2883,8
1825,3
1696,1
1758,5
1809,0
1091,5
50
133,7
2110,1
1940,5
3299,2
2088,2
1940,5
2011,8
2069,6
1248,7
50
6"
150,0
2659,2
2445,4
4157,6
2631,6
2445,4
2535,3
2608,1
1573,6
50
159,3
2999,2
2758,0
4689,2
2968,0
2758,0
2859,4
2941,6
1774,8
50
182,5
3941,1
3624,2
6161,8
3900,1
3624,2
3757,4
3865,4
2332,1
50
190,0
4271,6
3928,2
6678,7
4227,3
3928,2
4072,6
4189,6
2527,8
50
8"
200,0
4738,8
4357,7
7409,0
4689,5
4357,7
4517,9
4647,7
2804,2
50
206,5
5051,8
4645,6
7898,4
4999,3
4645,6
4816,4
4954,8
2989,4
50
10"
250,0
7413,2
6817,1
11590,4
7336,1
6817,1
7067,7
7270,8
4386,8
50
260,4
8052,4
7404,9
12589,8
7968,7
7404,9
7677,1
7897,7
4765,0
50
12"
300,0
10687,7
9828,3
16710,1
10576,6
9828,3
10189,6
10482,4
6324,5
50
309,7
11390,0
10474,2
17808,1
11271,6
10474,2
10859,2
11171,2
6740,1
50
339,6
13695,5
12594,2
21412,7
13553,1
12594,2
13057,2
13432,4
8104,4
50
400,0
19000,4
17472,6
29706,8
18802,9
17472,6
18114,9
18635,4
11243,6
50
500,0
29688,1
27300,9
46416,9
29379,5
27300,9
28304,5
29117,7
17568,1
50
600,0
42750,8
39313,3
66840,4
42306,5
39313,3
40758,4
41929,6
25298,0
50
700,0
58188,6
53509,8
90977,1
57583,9
53509,8
55476,8
57070,8
34433,4
50
800,0
76001,4
69890,3
118827,3
75211,6
69890,3
72459,4
74541,4
44974,3
50
900,0
96189,3
88454,9
150390,8
95189,7
88454,9
91706,5
94341,5
56920,6
50
1000,0
118752,2
109203,6
185667,6
117518,1
109203,6
113217,9
116471,0
70272,3
50
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring ranges
DB50 English V1.18
Seite 16
5.2 Maximum Flow Ranges „Standard“
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural gas3)
Methan
m/s
1/4"
6,0
4,7
4,3
7,4
4,7
4,3
4,5
4,6
2,8
92,7
10,0
14,9
13,7
23,4
14,8
13,7
14,2
14,7
8,8
92,7
15,0
38,9
35,8
60,9
38,5
35,8
37,1
38,2
23,0
92,7
1/2"
16,1
45,6
41,9
71,3
45,1
41,9
43,4
44,7
27,0
92,7
3/4"
21,7
89,1
81,9
139,3
88,2
81,9
84,9
87,4
52,7
92,7
1"
25,0
122,2
112,4
191,1
120,9
112,4
116,4
119,9
72,3
92,7
26,0
132,9
122,2
207,8
131,5
122,2
126,5
130,3
78,6
92,7
27,3
147,7
135,8
230,9
146,1
135,8
140,6
144,8
87,4
92,7
28,5
162,0
149,0
253,3
160,3
149,0
154,3
158,9
95,9
92,7
30,0
180,9
166,4
282,9
179,0
166,4
172,3
177,5
107,1
92,7
1 1/4"
32,8
218,8
201,2
342,1
216,5
201,2
208,4
214,6
129,5
92,7
36,0
266,3
244,9
416,4
263,5
244,9
253,6
261,2
157,6
92,7
36,3
271,1
249,3
423,9
268,3
249,3
258,2
265,9
160,4
92,7
1 1/2"
39,3
320,6
294,8
501,3
317,3
294,8
305,3
314,5
189,7
92,7
40,0
332,6
305,8
519,9
329,1
305,8
316,7
326,2
196,8
92,7
41,9
365,0
335,6
570,6
361,2
335,6
347,6
358,0
216,0
92,7
43,1
389,5
358,2
609,0
385,4
358,2
370,9
382,0
230,5
92,7
45,8
442,0
406,5
691,1
437,4
406,5
421,0
433,5
261,6
92,7
2"
50,0
530,8
488,1
829,8
525,2
488,1
505,5
520,6
314,1
92,7
51,2
557,2
512,4
871,2
551,4
512,4
530,7
546,5
329,7
92,7
53,1
600,1
551,8
938,2
593,8
551,8
571,5
588,6
355,1
92,7
54,5
632,9
582,0
989,5
626,3
582,0
602,7
620,8
374,5
92,7
57,5
747,4
687,3
1168,5
739,6
687,3
711,8
733,1
442,3
92,7
60,0
773,7
711,5
1209,7
765,6
711,5
736,8
758,9
457,9
92,7
64,2
889,1
817,6
1390,0
879,8
817,6
846,7
872,0
526,1
92,7
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring ranges
DB50 English V1.18
Seite 17
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air 2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural gas3)
Methan
m/s
2 1/2"
65,0
912,5
839,1
1426,6
902,9
839,1
869,0
895,0
540,0
92,7
70,3
1071,2
985,1
1674,8
1060,0
985,1
1020,2
1050,7
633,9
92,7
71,1
1095,8
1007,7
1713,1
1084,3
1007,7
1043,5
1074,7
648,4
92,7
76,1
1258,3
1157,2
1967,3
1245,2
1157,2
1198,3
1234,2
744,6
92,7
3"
80,0
1394,0
1281,9
2179,4
1379,4
1281,9
1327,5
1367,2
824,9
92,7
82,5
1482,5
1363,3
2317,7
1466,9
1363,3
1411,8
1454,0
877,2
92,7
84,9
1570,0
1443,7
2454,5
1553,5
1443,7
1495,1
1539,8
929,0
92,7
90,0
1766,4
1624,3
2761,6
1747,9
1624,3
1682,1
1732,4
1045,3
92,7
4"
100,0
2183,3
2007,8
3413,5
2160,5
2007,8
2079,2
2141,4
1292,0
92,7
107,1
2507,4
2305,7
3920,1
2481,1
2305,7
2387,8
2459,2
1483,7
92,7
110,0
2645,0
2432,3
4135,3
2617,3
2432,3
2518,9
2594,2
1565,2
92,7
5"
125,0
3419,6
3144,7
5346,3
3383,8
3144,7
3256,6
3353,9
2023,6
92,7
133,7
3912,2
3597,6
6116,5
3871,3
3597,6
3725,7
3837,0
2315,1
92,7
6"
150,0
4930,2
4533,7
7708,0
4878,6
4533,7
4695,1
4835,4
2917,4
92,7
159,3
5560,5
5113,3
8693,4
5502,3
5113,3
5295,3
5453,6
3290,4
92,7
182,5
7306,7
6719,2
11423,6
7230,3
6719,2
6958,3
7166,4
4323,8
92,7
190,0
7919,6
7282,8
12381,8
7836,8
7282,8
7542,0
7767,5
4686,5
92,7
8"
200,0
8785,7
8079,2
13735,8
8693,8
8079,2
8366,8
8616,9
5199,0
92,7
206,5
9366,0
8612,9
14643,2
9268,0
8612,9
8919,4
9186,1
5542,4
92,7
10"
250,0
13744,0
12638,9
21487,8
13600,2
12638,9
13088,7
13480,0
8133,1
92,7
260,4
14929,1
13728,7
23340,6
14772,9
13728,7
14217,2
14642,3
8834,4
92,7
12"
300,0
19815,0
18221,7
30979,4
19607,7
18221,7
18870,1
19434,3
11725,6
92,7
309,7
21117,1
19419,1
33015,1
20896,1
19419,1
20110,1
20711,4
12496,1
92,7
339,6
25391,4
23349,7
39697,7
25125,7
23349,7
24180,6
24903,6
15025,5
92,7
400,0
35226,7
32394,1
55074,4
34858,0
32394,1
33546,9
34549,9
20845,6
92,7
500,0
55041,6
50615,8
86053,8
54465,7
50615,8
52417,0
53984,3
32571,2
92,7
600,0
79260,0
72886,8
123917,4
78430,6
72886,8
75480,5
77737,4
46902,5
92,7
700,0
107881,6
99207,0
168665,4
106752,8
99207,0
102737,4
105809,2
63839,5
92,7
800,0
140906,6
129576,5
220297,7
139432,2
129576,5
134187,6
138199,7
83382,2
92,7
900,0
178334,9
163995,2
278814,3
176468,9
163995,2
169831,2
174909,1
105530,6
92,7
1000,0
220166,6
202463,2
344215,1
217862,8
202463,2
209668,2
215937,1
130284,7
92,7
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring ranges
DB50 English V1.18
Seite 18
5.3 Maximum Flow ranges „Max speed“
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air 2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural gas3)
Methan
m/s
1/4"
6,0
9,4
8,7
14,7
9,3
8,7
9,0
9,2
5,6
185,0
10,0
29,8
27,4
46,6
29,5
27,4
28,4
29,2
17,6
185,0
15,0
77,7
71,4
121,4
76,9
71,4
74,1
76,2
46,0
185,0
1/2"
16,1
91,0
83,7
142,2
90,0
83,7
86,7
89,2
53,8
185,0
3/4"
21,7
177,8
163,5
278,0
176,0
163,5
169,5
174,4
105,2
185,0
1"
25,0
243,9
224,3
381,3
241,3
224,3
232,5
239,2
144,3
185,0
26,0
265,2
243,9
414,6
262,4
243,9
252,8
260,1
156,9
185,0
27,3
294,7
271,0
460,8
291,7
271,0
281,0
289,1
174,4
185,0
28,5
323,3
297,3
505,5
320,0
297,3
308,3
317,1
191,3
185,0
30,0
361,1
332,0
564,5
357,3
332,0
344,3
354,1
213,7
185,0
1 1/4"
32,8
436,7
401,6
682,8
432,2
401,6
416,3
428,3
258,4
185,0
36,0
531,5
488,7
831,0
526,0
488,7
506,7
521,3
314,5
185,0
36,3
541,1
497,6
845,9
535,4
497,6
515,8
530,7
320,2
185,0
1 1/2"
39,3
639,8
588,4
1000,4
633,2
588,4
610,0
627,6
378,6
185,0
40,0
663,7
610,3
1037,7
656,8
610,3
632,7
650,9
392,7
185,0
41,9
728,4
669,8
1138,9
720,8
669,8
694,5
714,4
431,0
185,0
43,1
777,3
714,8
1215,4
769,3
714,8
741,1
762,4
460,0
185,0
45,8
882,2
811,2
1379,3
873,0
811,2
841,1
865,2
522,0
185,0
2"
50,0
1059,2
974,1
1656,1
1048,2
974,1
1009,9
1038,9
626,8
185,0
51,2
1112,1
1022,6
1738,7
1100,5
1022,6
1060,2
1090,7
658,1
185,0
53,1
1197,6
1101,3
1872,4
1185,1
1101,3
1141,8
1174,6
708,7
185,0
54,5
1263,1
1161,6
1974,9
1250,0
1161,6
1204,3
1238,9
747,5
185,0
57,5
1491,6
1371,7
2332,1
1476,1
1371,7
1422,1
1463,0
882,7
185,0
60,0
1544,1
1420,0
2414,2
1528,1
1420,0
1472,2
1514,5
913,7
185,0
64,2
1774,3
1631,7
2774,1
1755,9
1631,7
1691,6
1740,2
1050,0
185,0
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring ranges
DB50 English V1.18
Seite 19
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air 2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural gas3)
Methan
m/s
2 1/2"
65,0
1821,0
1674,6
2847,2
1802,1
1674,6
1736,2
1786,1
1077,6
185,0
70,3
2137,9
1966,0
3342,5
2115,6
1966,0
2038,2
2096,8
1265,1
185,0
71,1
2186,8
2011,0
3419,0
2164,1
2011,0
2084,9
2144,8
1294,0
185,0
76,1
2511,2
2309,3
3926,3
2485,1
2309,3
2394,2
2463,0
1486,0
185,0
3"
80,0
2781,9
2558,2
4349,5
2753,0
2558,2
2652,3
2728,5
1646,2
185,0
82,5
2958,5
2720,6
4625,6
2927,8
2720,6
2820,6
2901,7
1750,7
185,0
84,9
3133,1
2881,2
4898,6
3100,6
2881,2
2987,1
3073,0
1854,1
185,0
90,0
3525,1
3241,7
5511,5
3488,5
3241,7
3360,8
3457,4
2086,0
185,0
4"
100,0
4357,2
4006,9
6812,5
4311,9
4006,9
4154,1
4273,5
2578,4
185,0
107,1
5003,9
4601,5
7823,5
4951,9
4601,5
4770,7
4907,8
2961,1
185,0
110,0
5278,6
4854,1
8253,0
5223,7
4854,1
5032,6
5177,2
3123,6
185,0
5"
125,0
6824,5
6275,7
10670,0
6753,6
6275,7
6506,4
6693,4
4038,4
185,0
133,7
7807,5
7179,7
12207,0
7726,4
7179,7
7443,7
7657,5
4620,1
185,0
6"
150,0
9839,0
9047,9
15383,2
9736,8
9047,9
9380,5
9650,0
5822,3
185,0
159,3
11096,9
10204,6
17349,9
10981,6
10204,6
10579,7
10883,7
6566,7
185,0
182,5
14581,9
13409,4
22798,7
14430,4
13409,4
13902,4
14301,8
8628,9
185,0
190,0
15805,1
14534,2
24711,1
15640,8
14534,2
15068,5
15501,5
9352,7
185,0
8"
200,0
17533,5
16123,6
27413,4
17351,3
16123,6
16716,3
17196,7
10375,5
185,0
206,5
18691,7
17188,7
29224,2
18497,4
17188,7
17820,6
18332,6
11060,9
185,0
10"
250,0
27428,8
25223,2
42884,5
27143,7
25223,2
26150,4
26901,8
16231,1
185,0
260,4
29793,8
27398,1
46582,2
29484,2
27398,1
28405,2
29221,4
17630,6
185,0
12"
300,0
39544,5
36364,7
61827,4
39133,6
36364,7
37701,5
38784,8
23400,7
185,0
309,7
42143,0
38754,3
65890,2
41705,1
38754,3
40179,0
41333,5
24938,4
185,0
339,6
50673,3
46598,7
79227,1
50146,7
46598,7
48311,6
49699,8
29986,2
185,0
400,0
70301,3
64648,4
109915,3
69570,8
64648,4
67024,9
68950,8
41601,2
185,0
500,0
109845,8
101013,2
171742,6
108704,3
101013,2
104726,4
107735,6
65001,8
185,0
600,0
158177,9
145459,0
247309,4
156534,3
145459,0
150806,1
155139,3
93602,6
185,0
700,0
215297,7
197985,8
336615,6
213060,5
197985,8
205263,8
211161,8
127403,5
185,0
800,0
281205,2
258593,7
439661,2
278283,1
258593,7
268099,7
275803,2
166404,6
185,0
900,0
355900,4
327282,7
556446,2
352202,1
327282,7
339313,7
349063,4
210605,9
185,0
1000,0
439383,1
404052,7
686970,6
434817,4
404052,7
418905,8
430942,5
260007,2
185,0
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring ranges
DB50 English V1.18
Seite 20
5.4 Maximum Flow ranges „High speed“
Inner diameter
of the pipe
Flow
(final value of measuring range in Nm³/h)
Max.
Inch
mm
Air 2)
Air 3)
Ar3)
CO23)
N23)
O23)
N2O3)
Natural gas3)
Methan
m/s
1/4"
6,0
11,4
10,5
17,8
11,3
10,5
10,9
11,2
6,7
224,0
10,0
36,1
33,2
56,4
35,7
33,2
34,4
35,4
21,4
224,0
15,0
94,1
86,5
147,0
93,1
86,5
89,7
92,2
55,7
224,0
1/2"
16,1
110,2
101,3
172,2
109,0
101,3
105,0
108,0
65,2
224,0
3/4"
21,7
215,3
198,0
336,7
213,1
198,0
205,3
211,2
127,4
224,0
1"
25,0
295,3
271,6
461,7
292,2
271,6
281,5
289,6
174,7
224,0
26,0
321,1
295,3
502,0
317,8
295,3
306,1
314,9
190,0
224,0
27,3
356,9
328,2
557,9
353,1
328,2
340,2
350,0
211,2
224,0
28,5
391,5
360,0
612,1
387,4
360,0
373,2
384,0
231,7
224,0
30,0
437,2
402,0
683,6
432,7
402,0
416,8
428,8
258,7
224,0
1 1/4"
32,8
528,7
486,2
826,7
523,3
486,2
504,1
518,6
312,9
224,0
36,0
643,5
591,8
1006,1
636,8
591,8
613,5
631,2
380,8
224,0
36,3
655,1
602,4
1024,3
648,3
602,4
624,6
642,5
387,7
224,0
1 1/2"
39,3
774,7
712,4
1211,3
766,7
712,4
738,6
759,8
458,5
224,0
40,0
803,6
739,0
1256,4
795,2
739,0
766,1
788,2
475,5
224,0
41,9
882,0
811,0
1378,9
872,8
811,0
840,9
865,0
521,9
224,0
43,1
941,2
865,5
1471,6
931,4
865,5
897,3
923,1
557,0
224,0
45,8
1068,1
982,2
1670,0
1057,0
982,3
1018,4
1047,6
632,1
224,0
2"
50,0
1282,5
1179,4
2005,2
1269,2
1179,4
1222,8
1257,9
758,9
224,0
51,2
1346,5
1238,2
2105,2
1332,5
1238,2
1283,7
1320,6
796,8
224,0
53,1
1450,1
1333,5
2267,1
1435,0
1333,5
1382,5
1422,2
858,1
224,0
54,5
1529,4
1406,4
2391,2
1513,5
1406,4
1458,1
1500,0
905,0
224,0
57,5
1806,1
1660,8
2823,8
1787,3
1660,8
1721,9
1771,4
1068,8
224,0
60,0
1869,6
1719,3
2923,2
1850,2
1719,3
1782,5
1833,7
1106,4
224,0
64,2
2148,4
1975,6
3359,0
2126,1
1975,6
2048,3
2107,1
1271,3
224,0
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar