| Hydrocarbon Dew-Point Measurement |
| Measuring Technique |
Dark SpotTM fixed sample analysis.
Direct photo-detection of hydrocarbon condensate at hydrocarbon dew-point temperature |
| Sensor Cooling |
Automatic via 3-stage Peltier effect electronic cooler under adaptive control |
| Maximum Range |
Up to Δ 55K measurement depression from Main Unit operating temperature |
| Accuracy |
±0.5°C hydrocarbon dew point (single and multiple condensible component analysis) |
| Sample Flow |
0.03m³/hr (0.5 Nl/min) – alarm standard |
| Measurement Frequency |
6 cycles/hour (recommended)
12 cycles/hour (maximum) |
| Water Dew-Point Measurement (Optional) |
| Measuring Technique |
Michell Ceramic Moisture Sensor |
| Units – Moisture content |
°C and °F water dew point; lb/MMscf; mg/m3, ppmV |
| Resolution |
0.1°C, 0.1°F |
| Range |
Calibrated from -100 to +20°Cdp |
| Accuracy |
±1°C from -59 to +20°Cdp
±2°C from -100 to -60°Cdp |
| Sample Flow |
0.06 to 0.3 m3/hr (1 to 5 Nl/min) alarm standard |
Pressure Measurement
Hydrocarbon Dew-Point Analysis Pressure
Optional Water Dew-Point Process Pressure |
| Units |
MPa, barg, psig |
| Resolution |
0.1 MPa and barg, 1 psig |
| Range |
HCdp: 0 to 100 barg
Wdp: 0 to 200 barg |
| Accuracy |
±0.25% FS |
| Hydrocarbon Dew-Point Analyzer |
| Resolution |
Hydrocarbon and water dew point: 0.1°C |
| Sample Gas Supply |
Natural gas up to 100 barg, pressure regulated in sampling system |
| Enclosure |
EExd cast enclosure with removable glass window viewing port. Internally heated for condensation protection |
| Sample Gas Connections |
1/4" NPT female ports for both hydrocarbon and water dew-point channels;
Sampling system: 6mm OD Std / 1/4" OD optional |
| Operating Environment |
Indoors/Outdoors -20 to +50°C; Max 95% RH |
| Power Supply |
90 to 260 V AC, 50/60 Hz, 125 W Main Unit
300 W c/w Sampling System (indoor)
400 W c/w Sampling system (outdoor) |
| Weight |
22.5kg Main Unit
42kg (approx) c/w Sampling System (indoor)
57kg (approx) c/w Sampling system (outdoor) |
| Integrated Display/Keyboard |
Touch screen with vacuum fluorescent display |
| Outputs |
Modbus RTU, RS485 @ 9600 baud rate
Two 4-20 mA linear (non-isolated) outputs, user-configurable for any combination of dew-point or pressure parameters |
| Alarms |
Process and analyzer status via software register and display annotation
Integrated low flow alarms for each sample flow
Analyzer status fault flag 23 mA on mA Output 1 |
| Certification |
| Hazardous Area Certification |
ATEX / IECEx: II 2G Ex d IIB + H2 Gb Tamb = -40°C to +60°C
Tamb -40°C to +60°C T3
CCSAUS certified to Class 1, Div 1, Groups B, C & D, T4
GOST Ex |
| Pattern Approval |
GOST-R, GOST-K, GOST-T, ukrSEPRO |
Remote Interface
Optional for indoor safe area installation |
| Host Capacity |
Up to 31 Michell EExd Process Instrumentation Range Analyzers in any combination of models via Modbus |
| Display |
Backlit colour 15cm/6" LCD |
| User Interface |
Integral mouse, on-screen keyboard |
| Function |
View and modify analyzer operating settings;
Record parameters to file and view virtual chart recorder analyzer diagnostics |
| Ports |
LAN, USB2, Modbus Re-transmission |
| Data Download |
CSV (comma separated variable) format for easy import to ExcelTM |
| Remote Access |
OPC (OLE for Process Control) over a LAN Imbedded web page/unique IP address for PC access
Remote data reading via Modbus RTU |
| Power Supply |
100 to 280 V, 50/60 Hz |
| Plant Control Integration |
ActiveX components to be used by software programmers for integration of Modbus protocol into a general plant software system |
