Vaisala DMT152 - Chapter 8 Technical Data; Measured Variables

User's Guide _______________________________________________________________________
62 ___________________________________________________________________ M210865EN-H
CHAPTER 8
TECHNICAL DATA
This chapter provides the technical data of Dewpoint Transmitter
DMT152.
Measured Variables
Dewpoint temperature
Measurement range
-80 … -10 °C (-112 … +14 °F) T
d
Accuracy
-80 … -40 °C (-112 … -40 °F)
± 2 °C (3.6 °F) T
d
-40 … -20 °C (-40 … -4 °F)
± 3 °C (5.4 °F) T
d
Non-calibrated range
-100 … -80 °C, -10 … +20 °C
(-148 … -112 °F
,
+14 … +68 °F T
d
)
Typical response time 63% [90%]
at +20 °C (+68 °F) gas temperature
and pressure of 1 bar
-10 ... -80 °C (+14 … -112 °F) T
d
0.5 min [7.5 min]
-80 ... -10 °C (-112 … +14 °F) T
d
2 s [5 s]
Analog output scalings
option 1
-80 ... +20 °C (-112 ... +68 °F) Td
option 2
-100 ... 0 °C (-148 ... +32 °F) Td
option 3
free scaling
ppm volume concentration
Measurement range
0 … 500 ppm
Accuracy at +20 °C (+68 °F),
1013 mbar
± (0.2 ppm + 20 % of reading)
0904-007
Figure 24 Accuracy Over Temperature Range
When dewpoint is below 0 °C, the transmitter outputs frostpoint for Td.
Dewpoint temperature (°C)
-40
-20 0
20
20
-60
-80
0
10
30
-10
-20
-30
-50
-40
-70
-10-30 10
30
40 50 60
70
-90
-100
Temperature of measured gas (°C)
Not recommended
Accuracy not specified
Accuracy not specified
Accuracy ±3 °C Td
Accuracy ±2 °C Td