Product guide

65
Humidity and Dew-Point Instruments
Please note: Michell Instruments adopts a continuous development program which sometimes
necessitates specifi cation changes without notice. Please contact us for latest version.
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Calibration
Optidew Vision
Precision Dew-Point Meter
For laboratory or process humidity measurement with best
accuracy and virtually zero drift, Optidew Vision combines
latest sensor design with digital control technology.
The Optidew Vision can be used with an S503 Relative
Humidity Generator, providing a low cost, high accuracy,
portable RH calibration package.
Highlights
• Fundamental drift free dew point measurement
• Measurement Range: <0.5 to 100 %RH from -40 to
+90°C (-40 to +194°F) ambient
• ±0.2°Cdp accuracy. Optional higher accuracy available
• High temperature sensor option to +130°C (+266°F)
• NEMA-12 bench-top housing
• Display and output of multiple engineering units
• High pressure sensor option to 25 MPa (250 barg)
Dimensions
Technical Specifi cations
Performance
Measurement range
at sensor temp of 20°C:
1-stage
2-stage
High temperature
-30 to +90°Cdp (-22 to +194°Fdp)
-40 to +90°Cdp (-40 to +194°Fdp)
-20 to +130°Cdp (-4 to +266°Fdp)
Measurement accuracy ±0.2°Cdp
±0.1°C temperature
±0.15°Cdp accuracy optional
Measurement units °C, °F dew point; %RH; °C, °F temperature;
g/m
3
; g/kg; a
w
;  (t – t dew point)
Response speed 1°C/sec plus settling time (dew point
dependent)
Power supply 85 to 264 V AC, 47/440 Hz
Dew-Point Sensor
Mirror options available Gold plated copper
Solid gold
316 stainless steel – high temp sensor
Temperature
measurement
4 wire Pt100, 1/3 DIN class B
Sample fl ow rate 0.1 to 2 l/min in sampling block
Max velocity 10 m/sec direct insertion
30 m/sec with sintered guard
Pressure 2 MPa (20 barg)
25 MPa (250 barg) optional
Ingress protection IP66 (NEMA 4)
IP65 25 MPa (250 barg) sensor (NEMA 12)
Cable length 2m (Maximum 30m) ((6.5’) (Max 98’))
Remote PRT
Temperature
measurement
4 wire Pt100, 1/10 DIN class B
Cable length 2m (Maximum 30m) ((6.5’) (Max 98’))
Transmitter Electronics
Resolution 0.1 for °C, °F and %RH
0.01 for g/m
3
and g/kg
Outputs
Analog
Digital
Alarm
Two channels 0/4-20 mA
RS232 (RS485 optional)
Volt free contact, 2A @ 30 V DC
Status LEDs Power on, DCC and alarm status
Operating temperature -20 to +50°C (-4 to +122°F) ambient
Enclosure Standing case with carry handle. Panel
mounting kit optional
Ingress protection IP54 (NEMA 2)
Cable pack Power and RS232 cables
I
0
100mm
85mm
250mm
Issue No: Optidew Vision_97144_V5_UK_0312
260mm
130mm