| 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 adaptive control |
| Maximum Range |
Up to Δ 55°C measurement depression from main unit operating temperature |
| Resolution |
0.1°C, 0.1°F |
| Accuracy |
±0.5°C hydrocarbon dew point
(single and multiple condensible component analysis) |
| Sample Flow |
0.03 to 0.06m³/hr (0.5 to 1.0 Nl/min) - low alarm standard |
| Measurement Frequency |
6 cycles/hour (recommended)
12 cycles/hour (maximum) |
| Water Dew-Point Measurement |
| Measuring Technique |
Michell Ceramic Metal-Oxide Moisture Sensor |
| Unit Selection |
Dew Point: °C and °F water dew point
Moisture Content: lb/MMscf; mg/m³, ppmV
(conversion method IGT#8 or ISO18453) |
| Resolution |
0.1°C, 0.1°F
0.1 lbs/MMscf, 1 mg/m³ ppmV |
| Range |
Calibrated from -100 to +20°Cdp |
| Accuracy |
±1°C from -59 to +20°Cdp
±2°C from -100 to -60°Cdp |
Pressure Measurement(s)
Hydrocarbon Dew-Point Analysis Pressure
|
| Units |
MPa, barg, psig |
| Resolution |
0.1 MPa and barg, 1 psig |
| Accuracy |
Hydrocarbon Dew Point: ±0.25 barg
Water Dew Point: ±0.5 barg |
| Hydrocarbon and Water Dew-Point Analyzer |
| Sample Gas Supply |
Natural gas up to 100 barg, pressure regulated in sampling system |
| Enclosure |
Travel case is stainless steel 316 material
construction with removable lid for access
and rubber feet for transportation/
operation
Instrument is EExd cast enclosure with
removable viewing port: internally heated
for condensation protection |
| Gas Connections |
Sample inlet, filter by-pass outlet, system
drain
Sample system for: 1/4” NPT female ports,
Quick connect Minimess® hoses
Process connections: 1/4” NTP male |
| Operating Environment |
Indoors/Outdoors 0 to +40°C; Max 95% RH* |
| Power Supply |
110 or 230 V AC, 50/60 Hz, 300 W |
| Weight |
60kg (approx) |
| Logged Data |
150 data logs, sufficient for minimum 24 hour period (stored in volatile memory);
Each Log: HC dew point and analysis pressure, water dew point and process line pressure
Visual Review: HMI display with automatic statistical analysis; maximum, minimum, average
values for duration of log period |
| 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;
Additional connection junction box required
externally |
| 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;
Comprehensive analyzer status messages
appear on HMI display;
Additional connection junction box required
externally |
| Certification |
| Hazardous Area Certification |
ATEX: II 2G Ex d e IIB+H2 T3
Gb Ta= -20°C to +40°C
IECEx: Ex d e IIB+H2 T3 Gb
Ta= -20°C to +40°C
|
| *Available to customer specific order — consult Process Sensing Technologies. |
