General information |
|
Ambient temperature |
-30 ... 55 °C (with heating) |
Explosion protection |
CENELEC Category 2G, T3 |
Supply voltage |
230 V AC, 115 V AC or 24 V DC |
Max. permissible pressure at input of high-pressure reduction |
160 000 hPa |
Max. permissible pressure at input of sample preparation system with pressure regulator |
160 000 hPa |
Max. permissible pressure at output of sample preparation system |
10 ... 500 kPa, min. 200 kPa below carrier gas pressure Optimum carrier gas pressure 600 ... 700 kPa |
Sampling |
|
Lance |
Outer diameter 6 mm and inner diameter 2 mm |
Special probe with BTU diaphragm and pressure reduction, non-retractable |
Immersion depth approx. 380 mm Protection pipe outer diameter 25.4 mm |
Process connection |
At flange DN65 PN16 Form C, max. 16 000 hPa gas pressure At flange DN65 PN160 Form C, max. 160 000 hPa gas pressure At flange ANSI, 2-inch, 300 lbs RF At flange ANSI, 2-inch, 2 500 lbs RF |
High-pressure reduction in casing with pressure regulators, optional heating |
Casing with dimensions 385 x 485 x 380 mm Primary pressure 160 000 hPa, output pressure 1 000 / 1 700 hPa (power consumption 150 W) |
Pipe base |
2-inch pipe base for free-standing transmitter casing, 1 700 mm high |
Heated line |
Heating power is 38 W per meter |
Sample preparation for 1 to 3 sample gas streams, plus calibration gas stream |
|
Basic configuration |
0.5 µm filter, 3/2-way solenoid valve, flowmeter, overflow valve and stop valve |
Pressure regulator, optional heating |
Primary pressure 160 000 hPa, output pressure 1 000 / 1 700 hPa (power consumption 150 W) |
Simple sample injection |
One 3/2-way solenoid valve per sample gas stream |
DB&B sample injection |
Two 3/2-way solenoid valves per sample gas stream |
On mounting plate |
652 x 422 x 3 mm |
In protective casing |
750 x 520 x 430 mm |
Protective casing heating |
Power consumption 300 W Adjustable between 10 and 40 °C, in increments of 5 |
Pipe base |
2-inch pipe base, 1 700 mm high |
Additional filters |
Aerosol, glycol |
SITRANS CV system components |
|
On mounting plate |
650 x 422 x 3 mm |
In protective casing |
750 x 520 x 430 mm |
Protective casing heating |
Power consumption 300 W |
Terminal box |
340 x 170 x 91 mm |
Pipe base |
2-inch pipe base, 1700 mm high |
Heated line |
Heating power is 38 W per meter |
Self-controlled heating up to approximately 80 °C |
|
Outer material is PE corrugated hose with 45 mm outer diameter |
|
Gas supply |
|
Transfer station |
Max. cylinder pressure 200 000 hPa |
Pipe base |
2-inch pipe base, mounted |
Gas cylinder cabinet |
Gas cylinder cabinet for two 50 l carrier gas cylinders and one 10 l calibration gas cylinder. Dimensions are 1 250 x 400 x 2 050 mm |
Cylinder heating |
The cylinder heating system is dimensioned for 10 l calibration gas cylinders and ensures that no condensation occurs within the gas cylinder. |
Cylinder pressure reducer |
Cylinder pressure reducer for reducing primary pressure of max. 300 000 hPa to output pressure 0 … 4 000 hPa |
Heated line |
Heating power is 38 W per meter |
Calibration gas |
|
Gas mixture 1 |
Min. storage temperature is -10 °C |
Gas mixture 2 |
Min. storage temperature is 0 … 5 °C |
Gas mixture 3 |
Min. storage temperature is -20 °C |
SITRANS CV
Dimensions and weights, installation |
|
Diameter |
25 cm (10") |
Height |
23 cm (9") |
Weight |
15 kg (35 lbs) |
Max. permissible ambient temperature |
-20 … 55 °C (-4 … 130 °F) |
Installation on |
Post, pipe or wall |
Gas connections |
Swagelok 1/8" |
Power supply |
|
Power supply |
24 V DC |
Power consumption |
Typically 18 VA, max. 50 VA |
Certificates |
|
Degree of protection |
IP65, NEMA 4X |
Explosion protection |
ATEX II 2 G EEx d IIC T4 FM Class I, Div 1, Groups B, C, D T4 FM Class I, Zone 1, Group II B+H2 T4 CSA Class I, Div 1, Groups B, C, D T4 |
Communication |
|
Communication |
Ethernet, RS485, RS232, ASCII |
Protocols |
TCP/IP, Modbus RTU |
Storage duration |
|
Reports |
100 days |
Hourly averages |
1 year |
Daily averages |
2 years |
Analysis |
|
Sample streams |
3 measuring streams, 1 calibration gas stream |
Repeatability for calorific value and density |
< 0,01 % |
Accuracy for calorific value and density |
< 0,1 % |
Minimum detection limit for neopentane |
< 10 ppm |
Cycle time |
< 180 s |
Carrier gas |
He |
Gas purity |
99,9 % (5,0) |
Required filtration |
Degree of separation 99.99 % for 0.1 m particles |
Consumption |
10 ... 40 ml/min |
Permissible carrier gas pressure |
500 … 700 kPA |
Perm. sample pressure |
10 ... 500 kPA, but min. 200 kPa under carrier gas pressure Notice: Sample must not contain ethine (acetylene). |
Sample flow |
20 ... 100 ml/min |
Max. sample temperature |
120 °C |
Phase |
Gaseous |
Solid components |
< 0.1 µm |
Required filtration |
Degree of separation 99.99 % for 0.1 m particles |
You can find further information on SITRANS CV under "Process gas chromatographs". |
Measurements can be made within the following working ranges:
Component |
Checked working range (in %) |
Possible working range (in %) |
---|---|---|
Methane |
57 ... 100 |
50 ... 100 |
Nitrogen1) |
0 ... 22 |
0 ... 25 |
Carbon dioxide |
0 ... 12 |
0 ... 20 |
Ethane |
0 ... 14 |
0 ... 20 |
Propane |
0 ... 5 |
0 ... 15 |
i-butane |
0 ... 0,9 |
0 ... 10 |
n-butane |
0 ... 1,8 |
0 ... 10 |
Neopentane |
0 ... 0,1 |
0 ... 1 |
i-pentane |
0 ... 0,12 |
0 ... 1 |
n-pentane |
0 ... 0,12 |
0 ... 1 |
Hexane+2) |
0 ... 0.08 |
0 ... 3 |
Helium |
Concentration can be entered as a fixed value in the components list |
No measured component |
H2S |
< 500 ppm |
No measured component |
Standard measuring ranges of natural gas components
1) Any oxygen or carbon monoxide present in the sample will be detected along with the nitrogen and, therefore, taken into account when the nitrogen concentration is determined.
2) Hexane+ = iso/n-hexane to iso/n-nonane
Analyses within the checked working range as well as the quality parameters resulting from these (upper and lower calorific values, density, relative density and Wobbe index) correspond to the requirements listed below. Measurements outside these specifications (Table 1, right-hand column) are possible, but checking of the repeatability and correctness has not been carried out.
Concentration range (mol.%) |
Repeatability according to ISO 6974-5 (2001); molar fraction (%) absolute |
---|---|
50 < xi < 100 |
0.03 |
1 < xi < 50 |
0.011 |
0.1 < xi <1 |
0.006 |
xi < 0.1 |
0.006 |
The repeatability of the measured components satisfies the criteria of ISO 6974-5 (2001)