Elster RABO Series User manual

Instruction Manual
Rotary Gas Meters
Type RABO
Betriebsanleitung
Drehkolbengaszähler
Typ RABO
Mode d`emploi
Compteur de gaz à pistons rotatifs
Type RABO
Manual de instrucciones
Contador de gas de pistones rotativos
Modelos RABO
Instruzioni d`uso
Contatore gas a pistoni rotanti
Tipo RABO
Gebruiksaanwijzing
Rotorgasmeters
Type RABO

Instruction Manual
Rotary Gas Meters
Type RABO
RABO G16-G250

Elster-Instromet
5
73021678b © Elster GmbH • All rights reserved • Subject to technical modification
Contens
1. Staff .................................................................................................................. 6
2. Legal Declarations ............................................................................................ 6
3. Intended Use and Field of Application .............................................................. 6
4. Technical Data .................................................................................................. 8
5. Operating Location ........................................................................................... 10
6. Installation Position, Flow Direction .................................................................. 11
7. Installation / Connection ................................................................................... 11
8. Lubrication and Maintenance ............................................................................ 13
9. Commissioning ................................................................................................. 14
10. Decommissioning ............................................................................................. 14
11. Function Check ................................................................................................. 14
12. Pulse Generators ............................................................................................. 15
13. Pressure Test Point .......................................................................................... 16
14. Temperature Test Points .................................................................................... 16
15. Index Versions .................................................................................................. 17
16. Absolute ENCODER S1D ................................................................................ 18
17. Care and Cleaning ............................................................................................ 20
18. Recycling and Environmental Protection .......................................................... 20
19. Annex A (ATEX Approvals) ............................................................................... 21
20. Annex B (Plastics Used) ................................................................................... 22
21. Annex C (Declaration of Conformity) ............................................................... 23

Elster-Instromet
673021678b © Elster GmbH • All rights reserved • Subject to technical modification
1. Staff
These instructions are aimed at staff who have adequate specialist and technical
knowledge (in Germany, for instance, in accordance with DVGW Codes of Practice
492 and 495 or comparable technical regulations) on the basis of their training and
experience in the sector of energy and gas distribution.
This product is intended
for calibratable volumetric metering of
- flammable gases: natural gas/town gas/propane/ butane,
- non-flammable gases: air/nitrogen/inert gases,
- and is suitable for use in potentially explosive atmospheres of Category 2
(Zone 1) of Class EX II 2 G c IIC.
Other fields of application / media on request.
This product is not intended for
- metering of aggressive gases, e.g. biogases or sewage gases, oxygen,
acetylene, hydrogen.
2. Legal Declarations
- Declaration of Conformity – see Annex C
- Period of validity of calibration – this is based on the regulations of the country
concerned, in which the rotary gas meter will be used.
- The calibration of rotary gas meters is only valid for the period of validity of
calibration. Once this has elapsed, rotary gas meters may no longer be used for
purposes which are subject to obligatory calibration.
3. Intended Use and Field of Application

Elster-Instromet
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73021678b © Elster GmbH • All rights reserved • Subject to technical modification
1 Meter housing 6 LF pulse generator
2 Housing cover (front) 7 HF pulse generator
3 Housing cover (rear) 8 Temperature test point
4 Pistons 9 Pressure test point
5 Index head
Please contact your Elster-Instromet Customer Service
(Tel. [phone] / -346) for assistance in commissioning, maintenance
and installation of encoders, pulse generators and volume correctors for instance.

Elster-Instromet
873021678b © Elster GmbH • All rights reserved • Subject to technical modification
4. Technical Data
Rotary gas meters in accordance with EN 12480
DN Type Qmax Qmin (m³/h)
Qt (m³/h)
(mm) G (m³/h) 1:160 1:130 1:100 1:80 1:65 1:50 1:30 1:20
32 16 25 - - - - - - 0,8
3,75
1,3
5
32 25 40 - - - - 0,6
2
0,8
4
1,3
6
2
8
32 40 65 - - 0,6
3,25
0,8
3,25
1
3,25
1,3
6,5
2
9,75
3
13
32 65 100 0,6
5
0,8
5
1
5
1,3
5
1,6
5
2
10
3
15
5
20
40 16 25 - - - - - - 0,8
3,75
1,3
5
40 25 40 - - - - 0,6
2
0,8
4
1,3
6
2
8
40 40 65 - - 0,6
3,25
0,8
3,25
1
3,25
1,3
6,5
2
9,75
3
13
40 65 100 0,6
5
0,8
5
1
5
1,3
5
1,6
5
2
10
3
15
5
20
50 16 25 - - - - - - 0,8
3,75
1,3
5
50 25 40 - - - - 0,6
2
0,8
4
1,3
6
2
8
50 40 65 - - 0,6
3,25
0,8
3,25
1
3,25
1,3
6,5
2
9,75
3
13
50 65 100 0,6
5
0,8
5
1
5
1,3
5
1,6
5
2
10
3
15
5
20
50 100 160 1
8
1,3
8
1,6
8
2
8
2,5
8
3
16
5
24
8
32
80 100 160 1
8
1,3
8
1,6
8
2
8
2,5
8
3
16
5
24
8
32
80 160 250 1,6
12,5
2
12,5
2,5
12,5
3
12,5
4
12,5
5
25
8
37,5
13
25
80 250 400 2,5
20
3
20
4
20
5
20
6
20
8
40
13
60
20
80
100 160 250 1,6
12,5
2
12,5
2,5
12,5
3
12,5
4
12,5
5
25
8
37,5
13
25
100 250 400 2,5
20
3
20
4
20
5
20
6
20
8
40
13
60
20
80

Elster-Instromet
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73021678b © Elster GmbH • All rights reserved • Subject to technical modification
Type RABO
Size: G 16 to G 250
Nominal diameter: DN 32 to DN 100
Pressure ratings: PN 16 or CLASS 150
Temperature ranges:
- gas / ambient
- storage
-25 °C to +70 °C
-40 °C to +70 °C
Housing material: Aluminium or
Spheroidal graphite cast iron
Mechanical ambient conditions: M1
Pulse generators
LF pulse generator E1
(reed contact)
Wiegand pulse
generator
HF pulse generator
(acc. to EN 60947-5)
Umax = 24 V Uma
x
d 30 V Urated = 8 VDC
Imax = 50 mA Ima
x
d 100 mA I t3 mA (exposed)
Pmax = 0,25 VA Pma
x
d 600 mW I d1 mA (covered)
Ri = 100 :(series resistor) Ri= 1 k:
Absolute ENCODER S1D
Absolut ENCODER S1D
Index
Number of Indexes 2
Number of digit rollers per
index
8
Temperature ranges -25°C to +60°C
Safety class IP 67
Interfaces and
ATEX approval
NAMUR (II 2 G EEx ia IIC T4) or
SCR/SCR+ (II 2 G EEx ib IIB T4) or
M-BUS (without ATEX)
LF pulse generator optional or retrofittable INS-10, -11, -12
Umax = 24 V, Imax = 50 mA, Pmax = 0,25 VA,
Ri = 100 :(series resistor)

Elster-Instromet
10 73021678b © Elster GmbH • All rights reserved • Subject to technical modification
5. Operating Location
If you …
- wish to mix in odorisation agents or
- use solenoid valves,
please always fit them only downstream of the meter. Otherwise, the device may be
damaged.
The flow through the meter must be free of vibrations / pulsations in order to avoid
measuring errors.
Compliance with the specified operating and ambient conditions as indicated on
the type label is absolutely essential for safe operation of the meter and additional
equipment.
The gas may not contain suspended particles > 50 μm. In addition, the gas must
be dry. Otherwise, the meter may be damaged.
To protect the meter, a cone strainer with mesh size 250 μm must be installed on all
new installations, and is also recommended for existing installations. When installing
the meter in a vertical position, with the direction of flow from bottom to top, a strainer
must be fitted to both the meter inlet and outlet (to protect against falling dirt).