Kobold KEC-1 User manual

Operating Instructions
for
Thermal Energy Flowmeter
for gases
Model: KEC-1
O
Or rd de er r f fr ro om m: :
C
C A A B Br ri ig gg gs s C Co om mp pa an ny y
622 Mary Street; Suite 101; Warminster, PA 18974
Phone: [phone] - Fax: [phone]
Sa[email protected] - www.cabriggs.com

Foreword
KEC-1 K01/1216 Page 2 of 43
I. Foreword
Dear customer,
thank you very much for deciding in favour of the KEC-1. 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 KEC-1 are only
guaranteed in case of careful observation of the described instructions and notes.
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: [phone]
Fax: [phone]

TableofContent
KEC-1 K01/1216 Page 3 of 43
II. Table of Content
I.Foreword .......................................................................................................................................... 2
II.Table of Content............................................................................................................................... 3
1Pictograms and Symbols ................................................................................................................. 5
2Signalwords according ISO 3864 and ANSI Z 535.......................................................................... 5
3Safety instructions............................................................................................................................ 6
3.1Intended Use ........................................................................................................................... 7
3.2Installation and commissioning................................................................................................ 7
4Technical data.................................................................................................................................. 8
4.1Signal circuits........................................................................................................................... 9
4.1.1Modbus................................................................................................................................ 9
4.1.2Current output...................................................................................................................... 9
4.1.2.1Aktive........................................................................................................................... 9
4.1.2.2Passive ........................................................................................................................ 9
4.1.3Pulse.................................................................................................................................... 9
4.1.4Alarm ................................................................................................................................... 9
4.2Measuring range flow KEC-1................................................................................................. 10
4.2.1Measuring range „Standard Version“................................................................................ 11
4.2.2Measuring range „Max Version“........................................................................................ 13
4.2.3Measuring range „High Speed Version“............................................................................ 15
5Dimensions..................................................................................................................................... 17
5.1Dimension KEC-1.................................................................................................................. 17
6Installation...................................................................................................................................... 18
6.1Pipe/tube requirements ......................................................................................................... 18
6.2Inlet / outlet runs.................................................................................................................... 18
6.3Installation KEC-1.................................................................................................................. 19
6.3.1½“ welded nipple with ball valve ½“................................................................................... 19
6.4Installation of the Sensor....................................................................................................... 20
6.4.1Mounting KEC-1 onto the ball valve.................................................................................. 20
6.5Alignement Display (Housing)............................................................................................... 21
6.6Tightening torques................................................................................................................. 21
7Connection diagram....................................................................................................................... 22
7.1Cable glands - clamping ranges............................................................................................ 22
7.2Connector pin assignment..................................................................................................... 23
7.3Wire connection..................................................................................................................... 24
7.3.1General:............................................................................................................................. 24
7.3.2Power supply..................................................................................................................... 24
7.3.3Modbus (termination):........................................................................................................24
7.3.4Pulse Output...................................................................................................................... 24
8Operation KEC-1............................................................................................................................ 25
8.1Main menu (Home)................................................................................................................ 26

Table of Content
KEC-1 K01/1216 Page 4 of 43
8.1.1Intialization......................................................................................................................... 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 Setup.................................................................................................................... 33
8.3.2.1Modbus Settings (2001…2005).............................................................................. 34
8.3.2.2Values Register (1001 …1500)................................................................................. 34
8.3.3Pulse /Alarm ...................................................................................................................... 36
8.3.3.1Pulse output............................................................................................................... 36
8.3.4User Setup......................................................................................................................... 37
8.3.5Advanced........................................................................................................................... 38
8.3.64 -20mA............................................................................................................................. 39
8.3.7KEC-1 Info......................................................................................................................... 41
8.4MBus...................................................................................................................................... 41
8.4.1Default Settings communication........................................................................................ 41
8.4.2Default values transmitted................................................................................................. 41
9Supplementary Documentation...................................................................................................... 42
10EU Declaration of Conformance................................................................................................. 43



Pictogram / Symbols
KEC-1 K01/1216 Page 5 of 43
1 Pictograms and Symbols
General Warning symbol (Danger, Warning, Caution)
General note
Installation- and Instruction manual to consider (on Nameplate)
Installation- and Instruction manual to consider
2 Signalwords according ISO 3864 and ANSI Z 535
Danger! Imminent danger
As a consequence of incorrect handling: serious personal injury or death
Warning! Possible hazard
As a consequence of incorrect handling: possible serious injury or death
Caution! Imminent hazard
As a consequence of incorrect handling: possible personal injury or damage
Note! Possible hazard
As a consequence of incorrect handling: possible personal injury or damage
Important! Additional notes, information, tips
As a consequence of incorrect handling: Disadvantages in operation and maintenance,
no danger

Safety instructions
KEC-1 K01/1216 Page 6 of 43
3 Safety instructions
Please check whether this manual corresponds with the device type.
Please attend to all notes indicated in this instruction manual. It contains essential information,
which has to be followed during installation, operation and maintenance. Therefore this
instruction manual has to be read categorically by the technician as well as by the responsible
user/qualified personnel before installation, initiation and maintenance
Regional and national regulations respectively, have to be observed in addition to this
instruction manual if necessary.
This instruction manual has to be available at any time at the operation site of the KEC-1.
Ensure that the KEC-1 operates within the permissible and listed limits on the nameplate.
Otherwise there is a risk to human and material, and it may occur functional and operational
disturbances
In case of any obscurities or questions with regard to this manual or the instrument please
contact Kobold GmbH.
Warning!
Risk of injury in case of inadequate qualification!
Improper handling can result in significant personal injury and damage.
All activities described in this operating instructions manual must be carried out only by
qualified personnel qualifications described below.
Professionals (Technical staff)
The technical staff is based on his education/training, his knowledge of measurement and control
technology as well of the local regulations, standards and guidelines in the position to do the work as
described and to identify the possible hazards.
Special working conditions require further appropriate knowledge, e.g. of aggressive media.
Caution!
Malfunction of KEC-1
Faulty installation and insufficient maintenance may lead to malfunctions of the KEC-1 which may
affect the display and open to misinterpretation.
Danger!
Inadmissible operating parameters!
By exceeding or falling short of limits there is a risk for people and material, in addition there
may occur further functional and operational disturbances.
Measures:
• Make sure that the KEC-1 operates only within the permissible and listed limits on the nameplate
• Ensure the operation within the performance data of KEC-1 in connection with the application
• Do not exceed the admissible storage and transportation temperature.
Additional safety information:
• When installing and operating the relevant national regulations and safety rules must also be
observed.
When using the Flow-/ Consumption sensors KEC-1 Ex in gas hazardous areas the special
requirements specified in the Ex documentation must be observed (in preparation).

Safetyinstructions
KEC-1 K01/1216 Page 7 of 43
3.1 Intended Use
The instrument described in this manual is exclusively to use for measuring the thermal mass flow of
gases. At the same time, the gas temperature is measured too.
The KEC-1 can be configured for measuring a predetermined range of pure gases or of
gas mixtures.
Consumption measurement of gases such as Air, oxygen, nitrogen, carbon dioxide, argon, etc.
and with ATEX approval explosive gases such as natural gas, methane, propane and hydrogen.
Improper or incorrect use the operational reliability will be canceled. The manufacturer is not liable for
any damage resulting by improper or incorrect use.
3.2 Installation and commissioning
Installation, electrical installation, commissioning, operation and maintenance of the device
must only be carried by qualified personnel, which were authorized by the plant operator.
The personnel must read the operating instructions and understand and follow their
instructions.
If carrying out welding work on the pipeline the grounding of the welding unit is not allowed to
be done over the KEC-1 itself.
The installer has to ensure that the KEC-1 is connected according to the electrical
connection diagrams properly. The sensor must be grounded, unless special protective
measures have been taken (e.g. galvanically isolated power supply)
The existing/ applicable national regulations governing opening and repair of the device have
to be applied.
When using the KEC-1 (ATEX Version) hazardous areas, in addition with the standard manual
a separate Ex documentation is enclosed. The installation instructions and connection values
indicated in these must also be observed (in preparation).
The device fulfills the general safety requirements in accordance with EN 61010-1,
the EMC requirements of IEC / EN 61326 and NAMUR recommendation NE 43.

Technical data
KEC-1 K01/1216 Page 8 of 43
4 Technical data
Measures: mass flow, consumption
flow speed, temperature
Measuring principle: thermal mass flow sensor
Medium temperature range: -40 ... 180 °C Probe (ATEX-Version -20 °C … 120 °C)
(in preparation)
Operating temperature range: -20 ... 70 °C
Operating pressure: 50 bar
Power supply: 18 … 36 VDC
Power consumption: max. 5 W
Output: Modbus RTU (acc. EIA/TIA-485 Standard)
2 x 4...20 mA active (optional passive) RL < 500 Ohm
galvanically isolated pulse (Pulse weight freely selectable,
Alarm max. 48 Vdc 0.5 A,
optional: Modbus TCP, HART, ProfibusDP, Profi Net,
Accuracy: ± 1.5 % m.v. ± 0.3 % f.s.
Standard version*
(m.v. of meas. value)
(f.s. of full scale)
Accuracy: ± 1.0 % m.v. ± 0.3 % f.s.
Precision version*
(m.v. of meas. value)
(f.s. of full scale)
Repeatability : 0.25% m.v in case of correct mounting (mounting aid,
position,inlet section
Accuracy indications: referred to ambient temperature 22 °C +/-2 °C, system
pressure 6 bar
Response time: t90 < 3 s
Display: 2“ TFT Color Display (320 x 240)
Screw in thread: G 1/2“ ISO 228, NPT 1/2“, R 1/2“, PT 1/2“
Material: Housing aluminum die cast,
probe stainless steel1,4571
Protection class IP67
* Reference conditions for Temperature and pressure can be freely set, standard conditions are 0 ° and 1013 mbar.

Technical data
KEC-1 K01/1216 Page 9 of 43
4.1 Signal circuits
4.1.1 Modbus
According Standard EIA/TIA-485
4.1.2 Current output
4.1.2.1 Aktive
Galvanically isolated
4 … 20 mA
R
L< 500 Ohm
4.1.2.2 Passive
Galvanically isolated
4 … 20 mA
R
L< 500 Ohm
Vin 12-36 Vdc
4.1.3 Pulse
Galvanically isolated (dry contact)
Passive: 48 Vdc , 500 mA
Max. pulse output freq. 50 Hz
4.1.4 Alarm
Galvanically isolated
Max. 48 Vdc, 500 mA

Measuring range
KEC-1 K01/1216 Page 10 of 43
4.2 Measuring range flow KEC-1
The flow-/consumption sensor KEC-1 is available in 3 different versions:
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 this corresponds to analogue output
4- 20 mA of:
Standard 0 … 600 m³/h
Max–Version 0 ... 1197.59 m³/h
Highspeed–Version 0 … 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.
For changing the inner pipe diameter and adjusting the 4…20 mA scaling, please refer to chapter
“Operation”.
The corresponding scale values for the respective version could be found in sections 4.2.1 to 4.2.3.
Example:
Pipe 1“, Inner diameter 25mm
Standard Version 0 … 122.2 m³/h
Max–Version Version 0 ... 1197.59 m³/h
Highspeed–Version 0 … 1450.06 m³/h

Measuring range
KEC-1 K01/1216 Page 11 of 43
4.2.1 Measuring range „Standard Version“
Innerdiameter of pipe Standard Version (92,7 m/s)
Full scale value in in Nm³/h
Recommanded
Sensor lenght
Inch mm Air 2) Air
3) Ar3) CO23) N23) O23) N2O3) Methane
3)
Natural
gas3)
1/2" 16.1 45.6 41.9 71.3 45.1 40.5 43.5 44.7 26.9
160 mm
3/4" 21.7 89.1 81.9 139.3 88.1 79.2 85.0 87.4 52.7
1" 25.0 122.2 112.3 191.0 120.9 108.6 116.5 119.8 72.2
26.0 132.9 122.1 207.7 131.5 118.1 126.7 130.3 78.6
27.3 147.5 135.7 230.8 146.1 131.3 140.8 144.8 87.3
28.5 162.0 148.9 253.2 160.3 144.0 154.5 158.9 95.8
30.0 180.9 166.3 282.8 179.0 160.8 172.5 177.4 107.0
1 1/4" 32.8 218.8 201.1 342.0 216.5 194.5 208.7 214.6 129.4
36.0 266.3 244.8 416.3 263.4 236.7 254.0 261.1 157.4
36.3 270.7 249.2 423.8 268.2 241.0 258.5 265.9 160.3
1 1/2" 39.3 320.1 294.7 501.2 317.2 285.0 305.7 314.4 189.5
40.0 332.5 305.7 519.8 329.0 295.6 317.1 326.1 196.6
41.9 366.7 335.5 570.5 361.1 324.4 348.1 357.9 215.8
43.1 389.4 358.0 608.8 385.3 346.2 371.4 381.9 230.3
45.8 441.9 406.3 691.0 437.3 392.9 421.5 433.5 261.3
2" 50.0 530.6 487.8 829.6 525.0 471.8 506.1 520.5 313.8
51.2 557.1 512.1 871.0 551.2 495.3 531.4 546.4 329.4
53.1 600.0 551.5 938.0 593.6 533.4 572.3 588.4 354.7
54.5 632.8 581.7 989.3 626.1 562.6 603.6 620.6 374.2
57.5 707.8 685.9 1166.6 738.3 663.4 711.7 731.8 441.2
60.0 773.6 711.1 1209.4 765.4 687.8 737.8 758.7 457.4
64.2 888.9 817.2 1389.7 879.5 790.3 847.8 871.8 525.6
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000 mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013.25 mbar

Measuring range
KEC-1 K01/1216 Page 12 of 43
Innerdiameter of pipe Standard Version (92,7 m/s)
Full scale value in in Nm³/h
Recommanded
Sensor lenght
Inch mm Air 2) Air 3) Ar3) CO23) N23) O23) N2O3) Methane
3)
Natural
gas3)
2 1/2" 65.0 913.5 838.7 1426.3 902.6 811.1 870.2 894.8 539.4
220 mm
70.3 1071 984.6 1674.5 1059.7 952.2 1021.6 1050.4 633.3
71.1 1095 1007.1 1712.8 1083.9 974.0 1044.9 1074.5 647.8
76.1 1258 1156.5 1966.9 1244.8 1118.5 1200.0 1233.9 743.9
3" 80.0 1390 1279.6 2176.3 1377.3 1237.6 1327.7 1365.3 823.1
82.5 1480 1362.5 2317.2 1466.5 1317.7 1413.7 1453.7 876.4
84.9 1569 1442.9 2454.0 1553.0 1395.5 1497.1 1539.5 928.1
90.0 1766 1623.5 2761.0 1747.3 1570.1 1684.4 1732.1 1044.2
4" 100.0 2183 2006.7 3412.8 2159.8 1940.7 2082.0 2140.9 1290.7
107.1 2507 2304.5 3919.3 2480.3 2228.8 2391.1 2458.7 1482.2
110.0 2644 2431..0 4134.4 2616.5 2351.1 2522.3 2593.6 1563.6
5" 125.0 3423 3143.0 5345.2 3382.7 3039.7 3261.0 3353.2 2021.5
133.7 3921 3595.7 6115.2 3870.0 3477.5 3730.7 3836.2 2312.7
6" 150.0 4941 4531.3 7706.4 4877.0 4382.4 4701.5 4834.4 2914.5
300 mm
159.3 5579 5110.6 8691.6 5500.5 4942.6 5302.5 5452.5 3287.1
182.5 7323 6715.6 11421.2 7227.9 6494.9 6967.8 7164.9 4319.4
190.0 7947 7278.9 12379.2 7834.2 7039.7 7552.3 7765.8 4681.7
8" 200.0 8816 8074.9 13733.0 8690.9 7809.5 8378.2 8615.1 5193.7
206.5 9398 8608.3 14640.1 9265.0 8325.4 8931.6 9184.2 5536.8
10" 250.0 13742 12632.1 21483.4 13595.8 12216.9 13106.5 13477.2 8124.8
260.4 14945 13721.2 23335.8 14768.0 13270.3 14236.6 14639.2 8825.4
12" 300.0 19836 18211.8 30972.9 19601.2 17613.3 18895.9 19430.2 11713.7
309.7 21139 19408.6 33008.2 20889.3 18770.7 20137.5 20707.0 12483.5
400 mm
339.6 25418 23337.1 39689.5 25117.5 22570.1 24213.6 24898.4 15010.2
388.8 33317 32376.6 55063.0 34846.6 31312.6 33592.6 34542.6 20824.4
500.0 55101 50588.4 86036.0 54447.9 48925.9 52488.5 53972.9 32538.1
600.0 79345 72847.4 123891.8 78405.0 70453.3 75583.4 77720.9 46854.9
700.0 107998 99153.3 168630.5 106717.9 95894.8 102877.4 105786.8 63774.7
800.0 141058 129506.4 220252.1 139386.6 125250.3 134370.5 138170.6 83297.5
900.0 178527 163906.5 278756.5 176411.1 158519.9 170062.7 174872.1 105423.5
1000.0 220404 202353.8 344143.9 217791.5 195703.6 209953.9 215891.5 130152.4
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring range
KEC-1 K01/1216 Page 13 of 43
4.2.2 Measuring range „Max Version“
Innerdiameter of pipe Max Version (185,0 m/s)
Full scale value in in Nm³/h
Recommanded
Sensor lenght
Inch mm Air 2) Air
3) Ar3) CO23) N23) O23) N2O3) Methane
3)
Natural
gas3)
1/2" 16.1 90.98 83.7 142.2 90.0 80.9 86.7 89.2 53.8
160 mm
3/4" 21.7 177.84 163.5 278.0 176.0 158.1 169.6 174.4 105.2
1" 25.0 243.88 224.2 381.2 241.4 216.9 232.5 239.1 144.2
26.0 265.20 243.8 414.6 262.5 235.8 252.9 260.0 156.8
27.3 294.72 271.0 460.7 291.7 262.1 281.0 289.0 174.3
28.5 323.32 297.3 505.4 320.0 287.5 308.3 317.0 191.2
30.0 361.08 332.0 564.5 357.4 321.1 344.3 354.1 213.5
1 1/4" 32.8 436.69 401.5 682.7 432.2 388.3 416.4 428.2 258.2
36.0 531.48 488.7 830.8 526.0 472.6 506.8 521.1 314.3
36.3 541.06 497.5 845.8 535.5 481.1 515.9 530.5 320.0
1 1/2" 39.3 639.84 588.3 1000.2 633.3 568.9 610.1 627.4 378.4
40.0 663.68 610.2 1037.5 656.9 590.1 632.8 650.8 392.5
41.9 728.41 669.7 1138.7 720.9 647.7 694.5 714.2 430.7
43.1 777.34 714.7 1215.2 769.4 691.2 741.2 762.2 459.7
45.8 882.17 811.1 1379.0 873.1 784.4 841.2 865.0 521.7
2" 50.0 1059.23 973.9 1655.8 1048.3 941.9 1010.0 1038.6 626.4
51.2 1112.05 1022.5 1738.4 1100.6 988.8 1060.4 1090.4 657.6
53.1 1197.59 1101.1 1872.1 1185.3 1064.9 1141.9 1174.3 708.2
54.5 1263.13 1161.4 1974.6 1250.2 1123.2 1204.4 1238.5 747.0
57.5 1489.43 1369.5 2328.3 1474.1 1324.4 1420.2 1460.5 880.8
60.0 1544.12 1419.8 2413.8 1528.3 1373.0 1472.3 1514.1 913.1
64.2 1774.33 1631.4 2773.7 1756.1 1577.7 1691.8 1739.8 1049.3
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013.25 mbar

Measuring range
KEC-1 K01/1216 Page 14 of 43
Innerdiameter of pipe Max Version (185,0 m/s)
Full scale value in in Nm³/h
Recommanded
Sensor lenght
Inch mm Air 2) Air
3) Ar3) CO23) N23) O23) N2O3) Methane
3)
Natural
gas3)
2 1/2" 65.0 1821.03 1674.4 2846.7 1802.3 1619.2 1736.4 1785.6 1076.9
220 mm
70.3 2137.86 1965.7 3342.0 2115.9 1901.0 2038.5 2096.3 1264.2
71.1 2186.80 2010.7 3418.5 2164.3 1944.5 2085.1 2144.2 1293.2
76.1 2511.24 2309.0 3925.7 2485.4 2233.0 2394.5 2462.4 1485.0
3" 80.0 2778.58 2554.8 4343.6 2750.0 2470.7 2649.4 2724.5 1643.1
82.5 2958.51 2720.2 4624.9 2928.1 2630.7 2821.0 2900.9 1749.5
84.9 3133.15 2880.8 4897.9 3101.0 2786.0 2987.5 3072.2 1852.8
90.0 3525.11 3241.2 5510.6 3488.9 3134.5 3361.2 3456.5 2084.6
4" 100.0 4357.22 4006.3 6811.4 4312.5 3874.4 4154.7 4272.4 2576.6
107.1 5003.91 4600.9 7822.3 4952.5 4449.4 4771.3 4906.5 2959.1
110.0 5278.56 4853.4 8251.7 5224.3 4693.6 5033.2 5175.8 3121.5
5" 125.0 6824.50 6274.8 10668.3 6754.4 6068.3 6507.2 6691.7 4035.7
133.7 7807.53 7178.7 12205.1 7727.3 6942.4 7444.6 7655.6 4617.0
6" 150.0 9839.04 9046.6 15380.8 9738.0 8748.8 9381.7 9647.6 5818.3
300 mm
159.3 11096.91 10203.2 17347.2 10982.9 9867.2 10581.1 10881.0 6562.2
182.5 14581.94 13407.5 22795.1 14432.2 12966.1 13904.1 14298.2 8623.0
190.0 15805.08 14532.1 24707.2 15642.8 14053.7 15070.4 15497.5 9346.4
8" 200.0 17533.48 16121.3 27409.1 17353.4 15590.6 16718.4 17192.3 10368.4
206.5 18691.68 17186.2 29219.6 18499.7 16620.4 17822.8 18327.9 11053.3
10" 250.0 27428.75 25219.6 42877.8 27147.1 24389.4 26153.7 26895.0 16220.0
260.4 29793.76 27394.2 46574.9 29487.8 26492.3 28408.8 29214.0 17618.6
12" 300.0 39544.48 36359.5 61817.6 39138.4 35162.5 37706.2 38775.0 23384.7
309.7 42143.03 38748.8 65879.8 41710.2 37473.1 40184.0 41323.0 24921.3
400 mm
339.6 50673.25 46592.0 79214.6 50152.8 45058.1 48317.6 49687.2 29965.7
388.8 70301.30 64639.2 109898.0 69579.3 62511.2 67033.2 68933.3 41572.8
500.0 109845.79 100998.7 171715.7 108717.6 97673.7 104739.4 107708.2 64957.5
600.0 158177.93 145438.2 247270.6 156553.4 140650.1 150824.8 155099.9 93538.7
700.0 215297.74 197957.5 336562.7 213086.6 191440.4 205289.3 211108.2 127316.6
800.0 281205.22 258556.8 439592.2 278317.2 250044.6 268133.0 275733.1 166291.1
900.0 355900.35 327235.9 556358.8 352245.2 316462.7 339355.8 348974.7 210462.2
1000.0 439383.15 403995.0 686862.7 434870.6 390694.7 418957.8 430833.0 259829.8
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring range
KEC-1 K01/1216 Page 15 of 43
4.2.3 Measuring range „High Speed Version“
Innerdiameter of pipe High Speed Version (224,0 m/s)
Full scale value in in Nm³/h
Recommanded
Sensor lenght
Inch mm Air 2) Air
3) Ar3) CO23) N23) O23) N2O3) Methane
3)
Natural
gas3)
1/2" 16.1 110.16 101.3 172.2 109.0 98.0 105.0 108.0 65.2
160 mm
3/4" 21.7 215.33 198.0 336.6 213.0 191.5 205.3 211.2 127.4
1" 25.0 295.30 271.6 461.7 292.1 262.6 281.6 289.6 174.7
26.0 321.11 295.3 502.0 317.7 285.6 306.2 314.9 189.9
27.3 356.85 328.2 557.9 353.0 317.3 340.3 350.0 211.1
28.5 391.48 360.0 612.0 387.3 348.1 373.3 384.0 231.6
30.0 437.20 402.1 683.5 432.5 388.8 416.9 428.8 258.6
1 1/4" 32.8 528.75 486.3 826.6 523.1 470.2 504.2 518.6 312.8
36.0 643.52 591.8 1006.1 636.6 572.3 613.6 631.2 380.7
36.3 655.12 602.5 1024.2 648.1 582.6 624.7 642.5 387.5
1 1/2" 39.3 774.73 712.5 1211.2 766.4 689.0 738.8 759.9 458.3
40.0 803.59 739.0 1256.3 795.0 714.6 766.3 788.2 475.3
41.9 881.96 811.1 1378.9 872.5 784.3 841.0 865.0 521.7
43.1 941.21 865.6 1471.5 931.1 837.0 897.5 923.1 556.7
45.8 1068.14 982.3 1669.9 1056.7 949.9 1018.5 1047.6 631.8
2" 50.0 1282.52 1179.5 2005.1 1268.8 1140.5 1223.0 1257.9 758.6
51.2 1346.48 1238.3 2105.1 1332.1 1197.4 1284.0 1320.6 796.5
53.1 1450.06 1333.5 2267.0 1434.5 1289.5 1382.7 1422.2 857.7
54.5 1529.41 1406.5 2391.1 1513.0 1360.1 1458.4 1500.1 904.7
57.5 1803.42 1658.5 2819.5 1784.1 1603.8 1719.7 1768.8 1066.8
60.0 1869.63 1719.4 2923.0 1849.6 1662.6 1782.8 1833.7 1105.9
64.2 2148.38 1975.7 3358.8 2125.4 1910.5 2048.6 2107.1 1270.8
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Measuring range
KEC-1 K01/1216 Page 16 of 43
Innerdiameter of pipe High Speed Version (224,0 m/s)
Full scale value in in Nm³/h
Recommanded
Sensor lenght
Inch mm Air 2) Air
3) Ar3) CO23) N23) O23) N2O3) Methane
3)
Natural
gas3)
2 1/2" 65,0 2204,93 2027,7 3447,2 2181,3 1960,8 2102,6 2162,6 1304,3
220 mm
70,3 2588,55 2380,5 4046,9 2560,8 2302,0 2468,4 2538,9 1531,2
71,1 2647,80 2435,0 4139,6 2619,4 2354,7 2524,9 2597,0 1566,2
76,1 3040,63 2796,3 4753,7 3008,1 2704,0 2899,5 2982,3 1798,6
3" 80,0 3364,33 3094,0 5259,8 3328,3 2991,8 3208,1 3299,7 1990,1
82,5 3582,20 3294,3 5600,4 3543,8 3185,6 3415,9 3513,4 2118,9
84,9 3793,65 3488,8 5931,0 3753,0 3373,6 3617,5 3720,8 2244,0
90,0 4268,24 3925,3 6672,9 4222,5 3795,7 4070,1 4186,3 2524,7
4" 100,0 5275,76 4851,8 8248,1 5219,2 4691,7 5030,8 5174,5 3120,7
107,1 6058,78 5571,9 9472,3 5993,9 5388,0 5777,5 5942,5 3583,9
110,0 6391,34 5877,7 9992,2 6322,9 5683,7 6094,6 6268,6 3780,6
5" 125,0 8263,17 7599,2 12918,6 8174,6 7348,3 7879,5 8104,6 4887,8
133,7 9453,44 8693,8 14779,4 9352,1 8406,8 9014,5 9272,0 5591,9
6" 150,0 11913,22 10955,9 18625,0 11785,6 10594,3 11360,1 11684,5 7046,9
300 mm
159,3 13436,25 12356,6 21006,1 13292,3 11948,7 12812,4 13178,3 7947,8
182,5 17655,97 16237,2 27603,2 17466,8 15701,2 16836,2 17317,0 10443,8
190,0 19136,96 17599,2 29918,6 18931,9 17018,2 18248,5 18769,6 11319,9
8" 200,0 21229,73 19523,8 33190,4 21002,3 18879,3 20244,1 20822,2 12557,8
206,5 22632,08 20813,4 35382,8 22389,6 20126,4 21581,3 22197,6 13387,3
10" 250,0 33211,03 30542,3 51921,9 32855,2 29534,1 31669,1 32573,5 19644,9
260,4 36074,61 33175,8 56398,8 35688,1 32080,6 34399,7 35382,1 21338,8
12" 300,0 47880,89 44033,3 74856,6 47367,9 42579,8 45657,8 46961,7 28322,4
309,7 51027,24 46926,8 79775,6 50480,5 45377,8 48658,1 50047,7 30183,5
400
339,6 61355,72 56425,3 95923,1 60698,3 54562,8 58507,1 60177,9 36293,0
388,8 85121,58 78281,5 133078,5 84209,6 75697,4 81169,5 83487,5 50350,9
500,0 133002,47 122314,8 207935,1 131577,4 118277,2 126827,4 130449,3 78673,3
600,0 191523,55 176133,3 299426,6 189471,5 170319,2 182631,4 187847,0 113289,6
700,0 260684,83 239736,9 407552,8 257891,8 231823,3 248581,6 255680,6 154199,7
800,0 340486,31 313125,8 532313,9 336838,2 302789,6 324678,0 333950,2 201403,7
900,0 430927,99 396299,8 673709,7 426310,9 383218,1 410920,6 422655,7 254901,6
1000,0 532009,87 489259,1 831740,4 526309,8 473108,8 507309,4 521797,2 314693,3
2) Referred to DIN 1945 / ISO 1217 (20°C, 1000mbar) and compressed air.
3) Referred to DIN 1343: 0°C, 1013,25 mbar

Dimensions
KEC-1 K01/1216 Page 17 of 43
5 Dimensions
5.1 Dimension KEC-1
Sensor lenght L [mm] H [mm]
C1 220 441
C2 300 521
C3 400 621
C4 500 721
C5 600 821
C7 160 381
156
(
max
)
132 (max)
H
m
a
x
L

Installation
KEC-1 K01/1216 Page 18 of 43
6 Installation
6.1 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
6.2 Inlet / outlet runs
The principle of thermal Mass flow measurement is very sensitive against disturbances. 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
(ellbow < 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° ellbow or T-piece 15 x D 5 x D
2x ellbow á 90°
in einer Ebene 20 x D 5 x D
2x ellbow á 90°
3-dimensional 35 x D 5 x D
Control valve
45 x D 5 x D
The values represent the min.lenghts. 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
KEC-1 K01/1216 Page 19 of 43
6.3 Installation KEC-1
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.
6.3.1 ½“ welded nipple with ball valve ½“
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
KEC-1 K01/1216 Page 20 of 43
6.4 Installation of the Sensor
6.4.1 Mounting KEC-1 onto the ball valve
Assembly is carried out by inserting the connection thread with gasket. (G1/2“
thread, SW 32) into the connection piece (ball valve).
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 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
Adapter sleeve
Connection thread