Vaisala HMP4 - MMP8 Specifications; Figure 55 MMP8 a W Measurement Accuracy; Table 48 MMP8 Measurement Performance; Table 49 MMP8 Operating Environment

9.8 MMP8 specifications
Table 48 MMP8 measurement performance
Property Description/Value
Water activity
Measurement range 0 … 1 a
w
T
90
response time
1)
10 min
Sensor HUMICAPâ 180L2
Accuracy
2)
±0.01 a
w
(±1 %RS)
Temperature
Measurement range −40 … +180 °C (−40 … +356 °F)
Accuracy at +20 °C (+68 °F) ±0.2 °C (0.36 °F)
1) At +20 °C (+68 °F) in still oil.
2) In range 0 … 0.5 a
w
, including non-linearity, hysteresis, and repeatability. See accuracy graph
below.
0
0
0.1
±0.01
0.2
±0.02
0.3
±0.03
0.4 0.5 0.6 0.7 0.8
0.9
1.0
±0.04
a
w
reading accuracy
a
w
reference
T = 0 … +80 °C
T = −40 … 0 °C, +80 ... +180 °C
Figure 55 MMP8 A
w
measurement accuracy
Table 49 MMP8 operating environment
Property Description/Value
Operating temperature of probe head −40 … +180 °C (−40 … +356 °F)
Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)
Storage temperature range −40 … +80 °C (−40 … +176 °F)
Operating pressure range 0 … 40 bar (0 … 580 psia)
Installation pressure Up to 10 bar (145 psia)
Chapter 9 – Technical data
89