Specifications

100 Commerce Way, Woburn, MA 01801
TEL: 1-888-VAISALA (824-7252) FAX: [phone]
E-MAIL: [e-mail] Access catalog on-line at: www.vaisala.com/inc/ssdcat
66
TECHNICAL DATA - DMP 246
Measured Variables
Dewpoint temperature
Measurement range +50...+212°F (+10...+100 °C)
Accuracy ±3.6°F (±2 °C)
(in the full measurement range displayed in the graph below)
Response time (90%)
at 135 °C, from dry to wet 10 s
at 135 °C, from wet to dry 50 s
Mixing ratio 0...500g/kg dry air
Outputs
Two analog outputs selectable 0...20 mA, 4...20 mA
0...1V, 0...5 V, 0...10 V
Typical accuracy of analog output
at +68°F (+20°C) ±0.05%FS
Typical temperature dependence
of analog output 0.003%FS/°F (0.005%FS/°C)
General
Sensor DRYCAP
®
sensor
Connections screw terminals for 0.5 mm
2
wires (AWG 20),
stranded wires recommended
Operating voltage isolated 24 VDC/VAC (20...28 V)
option* 115 VAC, 230 VAC
Power consumption 100 mA max. (24 VDC)
Recommended external load for
current outputs < 500 ohm
0...1 V output > 2 kohm (to ground)
0...5 & 0...10 V outputs > 10 kohm (to ground)
Operating temperature range for
sensor head 32°...662°F (0...350°C)
electronics -40...+140 °F (-40...+60 °C)
with display cover 32...+122°F (0...+50 °C)
with power supply unit -40...+113 °F (-40...+45 °C)
with alarm outputs up to 8A -40...+104 °F (-40...+40 °C)
with alarm outputs up to 6 A -40...+140 °F (-40...+60 °C)
Storage temperature range -40...+158 °F (-40...+70 °C)
Housing material G-Alsi12 (DIN 1725)
Housing classification NEMA 4 (IP 65)
Housing dimensions 145 x 120 x 65 mm
Bushing for 7...10 mm diameter cables
(8 x 0.5 mm
2
shielded cable)
Sensor protection sintered filter of stainless
steel (HM46780)
Serial Interface Modules
Module types RS 485/422
digital current loop
Connections screw terminals for 0.5 mm
2
wires
(AWG 20), stranded wires recommended
Assembly plug-in module
Number of devices on line
RS 485/422 32
digital current loop 6 (single loop)
9 (dual loop)
Network cable type twisted pair
Network cable length 1000 m max.
Network data speed
RS 485/RS 422 9600 baud max.
digital current loop 4800 baud max.
* simultaneous installations with alarm outputs and
internal power supply is not possible.
Dimensions in mm
304
164 112.5
15
8
27.5
ø20
125
ø105
ø118
ø28
120
40.6
mounting
flange
sintered
filter
ø88.9
(fixed on top of
the cooling set)
DMP 246 probe
Cooling Set
Mounting Flange
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