| Hydrocarbon Dew-Point Measurement |
| Measuring Technique | DARK SPOT™ 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 adoptive control |
| Maximum Range | Up to Δ 55°C measurement depression from Main Unit operating temperature |
| Accuracy | ±0.5°C ( ±0.9°C) hydrocarbon dew point (single and multiple condensible component analysis) |
| Sample Flow | 0.03 Nm3/hr (0.5 Nl/min) - alarm standard (1.06 scfh) |
| 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 (-148 to +68°Fdp) |
| Accuracy | ±1°C from -59 to +20°Cdp (±1.8°F from -74.2 to +68°Fdp)
±2°C from -100 to -60°Cdp (±3.6°F from -148 to -76°Fdp) |
| Sample Flow | 0.06 to 0.3 Nm3/hr (1 to 5 Nl/min) - alarm standard (2.12 to 10.59 scfh) |
Pressure Measurements
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 (0 to 1450 psig)
Wdp: 0 to 200 barg (0 to 2900 psig) |
| Accuracy | ±0.25% FS |
| Hydrocarbon Dew-Point Analyzer |
| Resolution | Hydrocarbon and water dew point: 0.1°C
Pressure: 0.1 MPa and barg, 1 psig |
| 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 / ¼" OD optional |
| Operating Environment | Indoors/Outdoors -20 to +50°C (-4 to +122°F)
Max 95%RH |
| Power Supply | 90 - 264 V AC, 50/60 Hz, 200 W Main Unit
300W c/w indoor sampling system
400W c/w outdoor sampling system |
| Weight | Main Unit 22.5kg (49.6lb)
42kg (92.59lb) (approx) c/w Sampling System (indoor)
57kg ((125.66lb) (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 23mA on mA output 1 |
| Certification | |
| Hazardous Area Certification | ATEX: II 2 G EExd IIB + H2 T4 Tamb = -40
to +60°C
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 color 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 Retransmission |
| 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 | 100-280 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 |
