Vaisala DPT146 - Manual (Page 14)

User's Guide _______________________________________________________________________
12 ___________________________________________________________________ M211372EN-D
CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces the features, advantages, and product options.
Introduction to DPT146
Vaisala Dewpoint and Pressure Transmitter DPT146 for Compressed Air
combines online measurement of dewpoint and pressure. The dewpoint
measurement is continuously pressure compensated using the measured
pressure. Temperature output is also available if the transmitter has been
ordered with serial line output.
DPT146 also calculates two other parameters, ppm moisture by volume
and dewpoint in atmospheric pressure. The transmitter’s compact size
makes it well suited for integration into OEM systems.
Table 3 Output Parameters of DPT146
Parameter Abbreviation Metric Unit Non-Metric
Unit
Dewpoint/frost point temperature* Tdf ºC ºF
Dewpoint/frost point temperature*,
converted to atmospheric pressure
Tdfatm ºC ºF
ppm moisture, by volume H20 ppm ppm
Pressure, absolute P bara psia
Temperature** T ºC ºF
* When the dewpoint is below 0 °C, the transmitter outputs frost point for T
d
** Available if RS-485 only output is selected
Basic Features and Options
- Utilizes the Vaisala MPS1 multiparameter sensor with Vaisala’s
BAROCAP® and DRYCAP® technologies.
- Measurement ranges of measured parameters:
- Dewpoint -60 ... +30 °C (-76 ... +86 °F) T
d
- Pressure, absolute 1 ... 12 bar (14.5 ... 174 psi)
- Temperature -40 ... +80 °C (-40 ... +176 °F)
- Two analog output channels, selectable from 0 … 20 mA / 4 ... 20 mA
and 0 … 5 V / 0 … 10 V.
- Digital output: non-isolated RS-485.