Vaisala HMT360 - Manual (Page 79)

Chapter 9 ____________________________________________________________ Technical Data
VAISALA_______________________________________________________________________ 77
Water Activity in Jet Fuel Applications
Calculated Variables (Typical Ranges)
With HMP361 Probe
With HMP363, HMP364, HMP365, HMP367 and
HMP368 Probes
Table 10 Water Activity in Jet Fuel Applications Specifications
Property Description / Value
Measurement range 0 ... 1 a
w
at -40 ... +180 °C (-
40 ... +356 °F)
Accuracy when calibrated against high
quality, certified humidity standards
salt solutions (ASTM E104-85)
± 0.01 (0 ... 0.9)
± 0.02 (0.9 ... 1.0)
± 0.02 (0 ... 0.9)
± 0.03 (0.9 ... 1.0)
Response time (90 %) at +20 °C in still oil
(stainless steel filter) 10 min
Humidity sensor
Vaisala HUMICAP
®
Calculated variables available mass concentration of water
relative humidity of saturation
saturation temperature
Accuracy of the water content better than ± 15 % of the
reading
Table 11 HMP361 Calculated Variables Specifications
Property Description / Value
Dewpoint temperature -40 ... +60 °C
Mixing ratio 0 ... 160 g/kg d.a.
Absolute humidity 0 ... 160 g/m³
Wet bulb temperature 0 ... +60 °C
Table 12 HMP363, HMP364, HMP365, HMP367& HMP368
Probes Calculated Variables Specifications
Property Description / Value
Dewpoint temperature -40 ... +100 °C
Mixing ratio 0 ... 500 g/kg d.a.
Absolute humidity 0 ... 600 g/m³
Wet bulb temperature 0 ... +100 °C