Vaisala HMD70U Service Manual Page 79

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77
Technical Data
Dewpoint Temperature
Measurement range -20 ... +55 °C (-4 ... +131 °F)
Accuracy ±2 °C (±3.6 °F) (see graph below)
Dewpoint accuracy vs. measurement conditions
Response time 15 s
Humidity sensor Vaisala HUMICAP
®
180
Temperature sensor Pt 100 IEC 751 1/3 class B
Operating Environment
Operating temperature -5 ... +60 °C (+23 ... +140 °F)
Storage temperature -40 ... +80 °C (-40 ... 176 °F)
Relative humidity 0 ... 95 %RH
operating and storage
Operating Environment
Operating temperature -5 ... +60 °C (+23 ... +140 °F)
Storage temperature -40 ... +80 °C (-40 ... 176 °F)
Relative humidity 0 ... 95 %RH
operating and storage
Dimensions
Dimensions in mm
HUMICAP
®
is a registered trademark of Vaisala.
Electromagnetic Compatibility
Complies with EMC standard EN61326-1, Generic Environment
General
Operating voltage with voltage output 12 ... 35 VDC
11 ... 28 VAC
Operating voltage with current output
20 ... 35 VDC / 19 ... 28 VAC with RL500 ohm
17 ... 35 VDC / 16 ... 28 VAC with RL50 ohm
Supply current 10 mA + load current
Load for voltage output min. 10 kohm
Load for current output max. 500 ohm
Connections screw terminals 0.5 ... 1.5 mm
2
Housing ABS plastics
Housing colour NCS-2502-R
Housing classification IP33
Weight 110 g
Outputs
Analog outputs (scalable) 4 ... 20 mA
0 ... 1 V
0 ... 5 V
Resolution for current output 0.002 mA
Resolution for voltage output 0.3 mV
Typical temperature dependence 0.005 % of span/ °C
0
20
40
60
Process temperature (°C)
Dewpoint temperature (°C)
30
70
-30
40
50
60
20
10
0
-20
-10
-40
3010
50
-5
Accuracy ±2 °C T
d
Accuracy not specified
Risk of condensation
Ref. B210394EN-B ©Vaisala 2010
This material is subject to copyright protection, with all
copyrights retained by Vaisala and its individual partners. All
rights reserved. Any logos and/or product names are trademarks
of Vaisala or its individual partners. The reproduction, transfer,
distribution or storage of information contained in this brochure
in any form without the prior written consent of Vaisala is strictly
prohibited. All specifications — technical included — are subject
to change without notice.
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
110 (4 .33)
85 (3.35)
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