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Promet I.S. User’s Manual
46 97221 Issue 5, March 2017
APPENDIX A
Appendix A Technical Speci fi cations
Sensors
Sensor Technology Michell Ceramic Moisture Sensor
Sensor Version Easidew PRO I.S.
Measurement Range -100 to +20°Cdp (-148 to +68°Fdp)
Calibration Range -100 to +20°Cdp (-148 to +68°Fdp)
Calibration
Traceable to British (NPL) and American (NIST) National Humidity
Standards
Accuracy
Dew point: ±1°C between –60 and +20°Cdp (-76 and +68°Fdp)
Moisture content: ±10% of reading
Dew point: ±2°C between –60.1 and -100°Cdp (-76.18 and -148°Fdp)
Resolution 0.1°C b20 and -100°Cdp (+68 and-148°Fdp)
Analysis Pressure Up to 45 MPa (450 barg / 5801 psig)
Operating Temperature -40 to +60°C (-40 to +140°F)
Sample Flow Rate 1 to 5 Nl/min (2.1 to 10.6 scfh)
Optional Pressure Sensor 0–138 barg (other ranges available) Accuracy: ±0.25% FS
Control Unit
Display
Two line 6-digits LED, displaying moisture content / dew point (user
toggle) and analysis pressure
Analog Output
Two 4-20 mA (max load 500 Ω )
User con fi gured for parameter, unit and range
Digital Output RS485 Modbus RTU
Display Mode
Moisture content (ppm
V
)
Moisture content in natural gas (ppm
V
, lb/MMscf, mg/m³)
Dew point (°C or °F)
Pressure (psig, barg)
Pressure Compensation
Fixed value (user programmed) or dynamic input from optional
pressure sensor
Display Resolution
0.1°Cdp, 0.1°Fdp, 0.1-0.001 ppm
V
ideal gas (adjustable), 0.01 ppm
V
natural gas, 0.01 mg/m³, 0.01 lb/MMscf, 1 psig, 0.1 barg
Alarms
Four alarm relays
Control action and set-point are user-programmable
Two Form C contacts rated 10 A, 240 V AC or 8 A, 24 V DC Non-
inductive load
Two Form A contacts rated 5 A, 240 V AC or 4 A 24 V DC Non-
inductive load
I.S. Barriers Galvanic isolation type, integrated to Control Unit
Power Supply
85 to 265 V AC, 47/63 Hz or 10 to 72 V DC
10 W max power consumption
Operating Environment Indoor, safe area, 0 to +50°C (+32 to +122°F) < 90% RH
Interconnection Cable
General instrument type, twisted pair, screened, single pair (two pairs
with pressure sensor)
Enclosure
19” sub rack unit
Dimensions 132 x 483 x 375mm (5 x 19 x 14.75”) (h x w x d)
(100mm (4”) minimum rear clearance depth for cables and vents)