Vaisala HMP228 Guide de l'utilisateur Page 53

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Chapter 15 _____________________________________________________ Technical Specifications
VAISALA _______________________________________________________________________ 51
CHAPTER 15
TECHNICAL SPECIFICATIONS
Measured variables
Water activity a
w
Measurement range 0...1 (@-40...+60 °C/ -40...+140 °F)
Accuracy (including nonlinearity and repeatability)
When calibrated against salt solutions (ASTM E104-85):
±0.02 (0...0.9)
±0.03 (0.9...1.0)
When calibrated against high-quality, certified humidity standards:
±0.01 (0...0.9)
±0.02 (0.9...1.0)
Response time (90 %) at +20 °C in
still oil (stainless steel filter) 10 min
Humidity sensor HUMICAP
®
Temperature
Measurement range -40...+100 °C (-40...+212 °F)
Typical accuracy at +20 °C (+68 °F) ±0.1 °C (±0.18°F)
Typical temperature dependence
of electronics ± 0.005 °C/°C (±0.003°F/°F)
Temperature sensor Pt 100 RTD 1/3 Class B IEC 751
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