Vaisala DMT152 - Manual (Page 66)

User's Guide _______________________________________________________________________
64 ___________________________________________________________________ M210865EN-F
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