Vaisala DPT145 - Manual (Page 54)

User's Guide _______________________________________________________________________
54 ___________________________________________________________________ M211371EN-D
CHAPTER 8
TECHNICAL DATA
This chapter provides the technical data of the DPT145.
Specifications
Table 12 Measured Parameters
Parameter Measured Range
Dewpoint -50 ... +30 °C (-58 ... +86 °F)
Pressure, absolute 1 ... 12 bar (14.5 ... 174 psi)
Temperature -40 ... +80 °C (-40 ... +176 °F)
Table 13 Calculated Parameters
Parameter Measured Range
Pressure, normalized to 20 °C (68 °F) 1 ... 12 bara (14.5…174 psia)
SF
6
or SF
6
/N
2
mixture density 0 ... 100 kg/m 3
ppm moisture, by volume 40 ... 40 000 ppm
Dewpoint, converted to atmospheric
pressure
-65 … +30 °C (-85 ... +86 °F)
Table 14 Performance
Property Description / Value
Dewpoint accuracy ±3 °C (±5.4 °F), see Figure 12 on
page 55
Dewpoint stability typical drift < 2 °C (3.6 °F)/5a
Pressure accuracy at 23 °C (73.4 °F) ±0.04 %FS
Pressure temperature dependence ±0.01 bar/10 °C (18 °F)
Temperature accuracy
0 ... +40 °C (+32 ... +104 °F) ±0.5 °C (± 0.9 °F)
-40 ... +80 °C (-40 ... +176 °F) ±1 °C (± 1.8 °F)
Density accuracy (pure SF
6
, 1 ... 10 bara)
0 ... 40 °C (+32 ... +104 °F) ±1 %FS
-40 ... +60 °C (-40 ... +140 °F) ±2.2 %
ppm accuracy, typical
(5 ... 1000 ppm, 7 bar) ±(7 ppm + 15 % of reading)
Sensor response time
Pressure response time < 1 s
Dewpoint response time*
63% [90%] at 20°C and 1 bar
-50 -> -10 °C Tdf 5 s [10 s]
-10 -> -50 °C Tdf 10 s [2.5 min]
* system equilibrium related response time is typically longer