Gas meter

Quanto Gas Meter with electronic index CPT-04E

The CPT-04 E electronic quantometer represents new line of measuring devices manufactured by Common, whose modular construction combines modern electronics and classic mechanical solutions.

Gas volume measurement is processed by means of precise mechanical system and non-contact electronic sensors.

The construction of the CPT-04E allows to equipped the device with the one of the available versions of communication interface.

 

Electronic systems of the index head ensure high resolution of stream measurement, comparable to measurements obtained with the use of HF-pulser in previous constructions.

Information on volume, stream, and measurement history can be read directly on the device’s display.

The basic functions of the device are operated by means of two buttons.

The standard equipment of the CPT-04E quantometer are LF , HF outputs and configurable OUT outputs.

The communication interface simplifies the integration of the CPT-04E quantometer with SCADA and BMS systems SCADA, BMS.

 

• from DN25 to DN150;

 

• 9-digits LCD;

 

• LF-pulser, HF-pulser as standard

 

• communication interface:

4-20mA, RS-485, M-Bus;

 

• data reading protocols:

Modbus, GazModem, M-Bus;

 

• high resolution of gas stream measurement;

 

• detection of the gas flow direction;

 

• registration of the data and alarms;

 

 gas guard” of the hourly gas consumption.

Karta Informacyjna KI:CPT-04E/EN/2023.08.07    standard:                        optional:

 

 

socket 1

OC-type transmitter:

• LF-pulser
• 2 x OUT – configurable outputs:
  • additional output of LF-pulses
  • signalization of the manipulation by magnetic field, control circuit (AFK)
  • hourly limit of the gas consumption

(“gas guard “)

• actual direction of the gas flow (F-DIR)

 

socket 2

Namur transmitter (galvanic isolated):

✓ LF output

✓ HF output     

socket 3

interfaces (galvanic isolated):
✓ 4-20mA analog current loop
✓ M-Bus digital or
✓ RS-485 digital or
✓ ENCODER Namur digital  

socket 4

Input

     

DN	G	Qmax	∆pmax	Qmin  with rangeability 1:10      1:20      1:30
–	–	[m3/h]	[mbar]		[m3/h]
DN25 (1”)	G 16 G 25	25 40	5,0 4,0	2,5 4
DN32 (1¼)	G 16 G 25	25 40	5,0 3,4	2,5 4
DN 40 (1½”)	G 40 G 65	65 100	3,6 6,8	6,5 10	– –	– –

accuracy class 1.5	Qt ÷ Qmax: ±1,5% (±1% )  Qmin ÷ Qt:  ±3,%  (±2%  )
operating temperature	-25°C  t  + 55°C
EX protection level	II 2G   Ex ib [ia Ga] IIB T3 Gb
MOP pmax	2 MPa
operating position	HV
IP protection class	IP66/67
LF-pulsers, 2x OUT	Open Collector (OC)
NAMUR LF+HF transmitters	EN IEC 60947-5-2:2020       EN 60947-5-6:2000
battery lifetime	up to 10 year
EMC environment class	E2
socket type (interfaces)	male socket  M12 (4-pin)
OPTO communication port	EN 62056-21

DN 50 (2”) G 40 65 3,0 6,5 – – or DN 50 G 65 100 5,6 10 – –

where:

DN – nominal diameter,

Q_max –  maximum stream of gas volume,

Q_min  – minimum stream of gas volume,

 

 

Rotary Gas Meter

CGR-FX
Rotary Gas Meter
for fiscal measurements
Rotary gas meters are positive displacement meters,
designed to measure quantity of gas, for custody transfer or techni-
cal measurement applications.
The CGR-FX Meters are applied in measurement systems where high
accuracy is required:
• transportation and distribution of natural gas
• primary and secondary measurements
• control metering of natural gas and non aggressive technical gases in industry
• flow measurement for technical purposes
Being a very precise instruments, resistant to disturbances and having a wide
measurement range, the CGR-FX Meters satisfy all technical demands of
customers.
The CGR-FX Meter consists of
the following main assemblies:
• Pressure resistant housing (1)
• Index head (2)
• Magnetic coupling (3)
• Measuring assembly (4)
All parts subject to servicing or main- tenance, like mechanical counter, LF (HF) sockets, oil filler and drain plugs, oil level sight-glass, are located on the front side of the meter. Thanks to this, it is not necessary to access the back side of the meter and then it could be located very close to a wall or other construction element what reduces the installation deep.
The gas flow through the rotary gas meter measurement chamber makes the two
“8”-shaped rotors to turn. The volume of gas closed between the measuring cham-
ber walls and rotors is transported four times in one full cycle from the meter inlet
to the outlet. The timing gears set the rotors at the angle of 90° one to the other.
The gear train, and the incorporated gas tight and hermetic magnetic coupling,
transfers the rotor rotation to the index unit, which is separated in that way from
the pressure tight housing. The actual volume of gas is indicated on the mechani-
cal counter. The measurement cartridge, as a separate unit, is fixed in the pressure
resistant housing by means of elastomere gaskets. Thanks to this, the possible
stresses, e.g. arising from improperly aligned piping, have no influence on
measurement results of the CGR-FX Meter. Moreover, the measuring
cartridge elements are made of materials with carefully selected values of thermal
expansion coefficients. This minimizes temperature stresses that could cause the
rotor seizures. All above factors, together with the highest precision machining of
parts allow to reduce small but necessary clearances between the moving rotors
and the measurement chamber walls, what reduces gas leakages to minimum and
results in very high accuracy and wide measuring ranges of our CGR-FX Meters.
✓ pressure rating:
PN16, ANSI150
other on request
✓ HTR version available
✓ nominal diameter:
DN40 up to DN100
✓ meter external housing:
aluminium or cast iron
✓ flow: 0.2 to 650 m³/h
✓ rangeability:
up to 1:250
(depending on the meter)
✓ temperature range:
ambient temperature -25°C to +70°C
✓ operating position:
horizontal or vertical
✓ accuracy class 1,0
according to EN12480 standard:

approvals:
• MID
• PED
• ATEX
traceabilty to PTB standards

 

 

 

 

 

 

 

All information included in the table refer to basic version of the meters. It is possible to manufacture compact version (smaller sizes, higher possible rangeability, higher noise level) and low speed version (bigger sizes, smaller possible rangeability, lower noise level).

Table 2: Specification of the rotary gas meters in aluminum and cast iron housings.

		Max							LF pulse	HF pulse	V cyclic	Pressure
DN	G	flow Qmax		Minimum flow Qmin [m3/h]											Series
									rate	rate	volume	loss at Qmax
[mm]	—	[m3/h]	1:50	1:65	1:100	1:160	1:200	1:250	[pulse/m3]		[dm3]	[Pa]		—
				A L U M I N U M H O U S I N G S
40/50	10	16	0,30	0,25	0,16	—	—	—	10	15390	0,23	75/65		171
	16	25	0,50	0,40	0,25	0,16	—	—	10	15390	0,23	160/140		171
	25	40	0,80	0,65	0,40	0,25	0,20	0,16	10	11201	0,31	240/180		171
40/50/65	40	65	1,30	1,00	0,65	0,40	0,30	0,25	10	7166	0,50	280/210/150		171
50/65/80	65	100	2,00	1,60	1,00	0,65	0,50	0,40	10	4297	0,81	325/270/200		171
50/80	100	160	3,20	2,50	1,60	1,00	0,80	0,65	1	2831	1,24	550/395		171
80/100	100	160	3,20	2,50	1,60	1,00	0,80	0,65	1	1654	1,29	220/190		241
	160	250	5,00	4,00	2,50	1,60	1,30	1,00	1	1081	2,00	370/280		241
	250	400	8,00	6,50	4,00	2,50	2,00	1,60	1	645	3,34	580/460		241
100	400	650	13,00	10,00	6,50	4,00	3,25	2,50	1	645	3,34	1200		241
				C A S T I R O N H O U S I N G S
40/50	10	16	0,30	0,25	—	—	—	—	10	7166	0,50	33/17		171
	16	25	0,50	0,40	0,25	—	—	—	10	7166	0,50	45/35		171
	25	40	0,80	0,65	0,40	0,25	—	—	10	7166	0,50	110/80		171
40/50/65	40	65	1,30	1,00	0,65	0,40	0,30	0,25	10	4297	0,50	195/150/110		171
50/65/80	65	100	2,00	1,60	1,00	0,65	0,50	0,40	10	4297	0,81	325/270/200		171
50/80	100	160	3,20	2,50	1,60	1,00	0,80	0,65	1	2831	1,24	550/395		171
80/100	100	160	3,20	2,50	1,60	1,00	—	—	1	1081	2,00	180/135		241
	160	250	5,00	4,00	2,50	1,60	1,30	1,00	1	645	2,00	270/210		241
	250	400	8,00	6,50	4,00	2,50	2,00	1,60	1	645	3,34	580/460		241
100	400	650	13,00	10,00	6,50	4,00	3,25	2,50	1	645	3,34	1200		241

All information included in the table refer to basic version of the meters.

It is possible to manufacture compact version (smaller sizes, higher noise level) and low speed version (bigger sizes, lower noise level).

Contact your local representative or the manufacturer to get more information about the products.

 

Turbine Gas Meter – Custody

CGT-02
Turbine Gas Meter
for custody transfer
The turbine gas meter measures the quantity of gas basing on the flow
principle. The gas flows through an integrated flow conditioner, which
distributes the flow proportionally in the annular slot and guides it to the
turbine wheel. The wheel is driven by the gas flow, and the angular veloci-
ty of the rotation is proportional to the gas flow rate. The rotary motion of
the turbine wheel is transferred mechanically by gear wheels, and the incor-
porated gas tight and hermetic magnetic coupling, to the index unit, mount-
ed on the top of the body, and shows the volume on the totalizer. The basic
components of the COMMON CGT series turbine gas meter are as follows:
Metrology:
The meters are manufactured in accordance with EC regulations and OIML recom-
mendations. The maximum permissible error is ±2% in the range Q+ Q, and
±1% in the range Q÷Qmax Meters with improved accuracy may be delivered on
request. Typical rangeability is 1:20. Some meters may be delivered with extended
rangeability 1:30. When meters operate at high pressure the rangeability can be
extended (depends on operating pressure).

• pressure resistant meter body (1)
• inlet flow conditioner (2)
•measuring cartridge with the turbine  wheel (3)
• magnetic coupling as the transferring element between the measuring
• cartridge and the index head (4)
• index head, IP67 protection class (5)
• lubricating system (some meters may be provided with self lubricating bearings)
Typical error curve of Turbine Meters

✓ pressure rating: PN10 + PN110 & ANSI150 ÷ ANS1600
✓ nominal diameter:
DN50 up to DN400
✓ meter bodies: ductile cast iron or steel
✓ flow: 5 to 10 000 m³/h
✓ rangeability:
1:20 min at atmospheric pressure
(increased rangeability on request)
✓ upstream pipe:
minimum 2 x DN
✓ temperature range:
gas temperature -25°C to +70°C
ambient temperature -25°C to +70°C
✓ operating position:
horizontal or vertical
measurement accuracy according to
✓ EN12261 standard:
0.2Qmax÷Qmax < ±1%
Qmin + 0.2Qmax < ±2%
✓ improved accuracy on request
approvals:
. MID
• PED
• ATEX
✓ traceabilty to PTB standards

Basic metrological parameters

Pressure loss
Pressure drop during the gas flow through the meter according to EN12261 is determined for air at atmospheric conditions.
To calculate pressure drop at higher pressures, the following formula may be used:

Definitions:
Prz –  pressure loss at pressure p [Pa]

pw – specific density of gas related to air

pa – base pressure (1,01325 bar)

p – gauge pressure upstream the meter

Wpd –  coefficient from the diagram below

p – pressure loss [Pa] at Qrnax from the Table with CGT-02 basic parameters

Outputs:

✓ Up to 10 transmitters for DN100-400

✓  Up to 8 transmitters for DN50-80
✓ 2 off low frequency pulse sensors (LFK reed contact or LFW Wiegand)
✓ LFI – low frequency inductive pulse sensors (NAMUR)
✓ HF1, HF2 – inductive pulse sensor s in the index head (NAMUR)
✓ HF3, HF4-inductive pulse sensors over the turbine wheel (NAMUR)
✓ HF5, HF6-inductive pulse sensor over the reference wheel (NAMUR)
✓ AFK – anti-fraud reed contact
✓ Electrical outputs – Amphenol TUCHEL
✓ Index housing made of aluminium what perfectly protects index head against accidental damages
✓ Index housing may be provided with two separate sockets
✓ 2 pressure measurement taps as standard
✓ 2 temperature measurement taps (option)

 

 

Quanto Gas Meter CPT-01

CPT-01 & CPT-01S
Quantometer
for secondary measurements
CPT-01 Quantometers have been designed in order to provide our customers with reliable and inexpensive measuring instruments for secondary flow measurements. Our great experience in designing and manufacturing of turbi- ne and rotary gas meters resulted in the development of indu- strial quantometers.
Taking into account our customers’ demands we created the instrument with excellent metrological characteristics and opera- ting performance close to performances of the turbine gas meters designed for custody transfer measurements. Other advantages of the CPT-01 Quantometers are as follows: high quality, easy maintenance, wide range of external devices that can co-operate with the quantometers, e.g. volume correctors, data loggers, data transmission systems. Due to that the CPT-01 Quantometers are well accepted by our domestic and foreign customers.
2
5
The basic components of the CPT-01 Quantometer are as follows:
pressure resistant meter housing (1)
inlet flow straightener (2)
measuring cartridge with the turbine wheel (3)
magnetic coupling as the transferring element between measuring cartridge and the index head (4)
index head (5)
maximum operating pressure: 20 bar suitable for PN16, PN20 ANSI 150 connection flanges
nominal diameter: DN25 up to DN200
meter housing: aluminium or steel (DN200)
flow:
2,5 to 2500 m3/h
rangeability:
up to 1:30
(depending on the meter)
temperature range:
gas temperature: -25°C to +70°C
ambient temperature: -25°C to +70°C
operating position: horizontal or vertical
measurement accuracy: Q,+Qmx < ±1,5% Qmin + Q, < ±3,0%
allowed medias: see Table 5

COMMON
Pressure loss
CPT-01 Quantometer for Secondary Measurements
Pressure drop during the gas flow through the quantometers is determined for air at atmospheric conditions. Maximum value of the Apmax pressure drop for every CPT-01 Quantometer is given in table 1. This value was established during tests carried out at Q with air (p = 1,2kg/m3 density). At real condi- tions Appressure drop may be calculated with the following formula:
Definitions:

maximum flow of the quantometer (according to Table 1) [m3/h] flow at real conditions [m/h]
Table 5: Physical properties of the most popular gases that may be measured by CPT-01 Quantometer. Density at 101,325kPa and 20°C.
Outputs
As an option the meters can be provided with maximum 8 pulse transmitters
2 off LFK-low frequency reed contact pulse sensor
2 off LFI – low frequency inductive pulse sensor (NAMUR)
2 off HF-inductive pulse sensors in the index head (NAMUR) – HF1, HF2
1 off HF-inductive pulse sensors in the meter body (NAMUR)-HF3
AFK – anti-fraud reed contact (available as an option)
Electrical outputs – Amphenol TUCHEL
Index housing made of aluminium what perfectly protects index head against accidental damages
Index housing may be provided with two separate sockets
1 pressure measurement tap
3-way valve-recommended for making connecions with pressure sensor of EVC

Gas
Chemical symbol (formula)
Density p
[kg/m3]
Density related to air
Execution

Standard IIB
Description of pulse sensor connections
Connection Socket 1
lead no
pulse sensor
Socket 2 pulse sensor
Connection HF over lead no
turbine wheel

Index head with encoder (option)
Index head with mechanical output (option)
JACOMMON
ISO9001&14001 certified