Vaisala DMT152 User Manual

Chapter 8 _____________________________________________________________ Technical Data
VAISALA ________________________________________________________________________ 63
Operating Environment
Temperature
-40 … +70 °C (-40 … +158 °F)
Relative humidity
0 … 100 %RH (up to +20 °C / +68 °F)
Pressure
0 … 50 bar (725 psia)
Measured gases
non-corrosive gases
Sample flow rate
no effect on measurement accuracy
Outputs
Two analog outputs (scalable)
0 … 20 mA
4 … 20 mA
0 … 5 V
0 … 10 V
Accuracy
voltage output
± 0.01 V
current output
± 0.01 mA
Typical temperature dependence
voltage output
± 0.001 % of span / °C
current output
± 0.005 % of span / °C
Digital output
RS485 (2-wire half-duplex)
ON/OFF output available instead of the 2
nd
analog output
purge inactive
0 V or 4 mA
purge active
5 V, 10 V or 20 mA
OR exceeded T
d
or ppm limit
user selectable
General
Sensor
Vaisala DRYCAP
®
180U
Thin-film capacitive polymer sensor
Startup time
10 .. 15 minutes
Recommended calibration interval
2 years
Operating voltage with
RS485 output
11* … 28 VDC
voltage output
15* … 28 VDC
current output
21 … 28 VDC
* For extended temperature down to -40 °C (-40 °F) or pressure up to
50 bar (725 psia) the supply voltage must be 21 ... 28 VDC.
Operating voltage fluctuation
max. 0.3 V
Supply current
normal measurement
20 mA + load current
during self-diagnostics
max. 220 mA pulsed
Load for
voltage output
min. 10 kOhm
current output
max. 500 Ohm

Vaisala DMT152 Specifications

General

Brand	Vaisala
Model	DMT152
Category	Transmitter
Language	English