Vaisala HMP155 User Manual download pdf (Page 73)

Chapter 7 ____________________________________________________________ Technical Data

VAISALA _______________________________________________________________________ 71

CHAPTER 7

TECHNICAL DATA

This chapter provides the technical data of the product.

Performance

Relative Humidity

Table 16 Relative Humidity Performance

Description Value

Measurement range 0 ... 100 %RH

Accuracy (including non-linearity, hysteresis and repeatability)

±1% RH (0 ... 90% RH) at +15 ... 25 °C (59 … 77 °F)

±1.7% RH (90 ... 100% RH)

at -20 … +40 °C (-4 … 104 °F) ±(1.0 + 0.008 × reading)% RH

at -40 ... -20 °C (-40 … -4 °F) ±(1.2 + 0.012 × reading)% RH

at +40 … +60 °C (104 … 140 °F) ±(1.2 + 0.012 × reading)% RH

at -60 ... -40 °C (-76 … -40 °F) ±(1.4 + 0.032 × reading)% RH

±0.6% RH (0 ... 40% RH) Factory calibration uncertainty

(+20 °C)

±1.0% RH (40 ... 97% RH)

Recommended humidity sensor

HUMICAP

180R for typical applications

HUMICAP

180RC for applications with chemical purge

and/or warmed probe

Response time for HUMICAP

180R(C) at 20 °C in still air with

sintered PTFE filter

63% 20 s

90% 60 s

Defined as ± 2 standard deviation limits. Small variations possible, see also calibration

certificate.

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Vaisala HMP155 User Manual Page 73