Vaisala HMD70U Wartungshandbuch Seite 73

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Seitenansicht 72
71
Technical Data
Measured Variables
DEW POINT TEMPERATURE
Measurement range -80 ... -10 °C (-112 ... +14 °F)T
d
Accuracy ±2 °C (3.6 °F) T
d
Non-calibrated range -100 ... +20 °C (-148 ... +68 °F)T
d
Analog output scalings
option 1 -80 ... +20 °C (-112 ... +68 °F) T
d
option 2 -100 ... 0 °C (-148 ... +32 °F) T
d
option 3 user-specified output scaling
when dew point is below 0 °C (32 °F) the transmitter outputs
frost point
Accuracy over temperature range
Accessories
Connection cable for MI70 hand-held indicator 219980
USB cable for pc connection 219690
Sampling cells (available for ISO G½”)
basic sampling cell DMT242SC
with Swagelok 1/4” male connectors DMT242SC2
with a quick connector and leak screw DSC74
two-pressure sampling cell DSC74B
NW40 flange 225220SP
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)
4 ... 20 mA, 0 ... 20 mA (3
wire)
0 ... 5 V, 0 ... 10 V
Accuracy of analog outputs ± 0.01 V / ±0.01 mA
Digital output RS485 (2-wire)
Alarm-level indication by analog signal user selectable
Purge information 5 V, 10 V, 20 mA or LED
Ref. B210750EN-C ©Vaisala 2010
This material is subject to copyright protection, with all
copyrights retained by Vaisala and its individual partners. All
rights reserved. Any logos and/or product names are trademarks
of Vaisala or its individual partners. The reproduction, transfer,
distribution or storage of information contained in this brochure
in any form without the prior written consent of Vaisala is strictly
prohibited. All specifications — technical included — are subject
to change without notice.
General
Sensor Vaisala DRYCAP
®
180U
Thin-film capacitive polymer sensor
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 temp. down to -40 °C (-40 °F) or pressure up to
50 bar (725 psia), the supply voltage is 21 ... 28 VDC.
Supply current
normal measurement 20 mA + load current
during self-diagnostics max. 220 mA pulsed
Supply voltage fluctuation max. 0.3 V
External load for
voltage output min. 10 kOhm
current output max. 500 Ohm
Housing material (wetted parts) AISI316L
Stainless steel mesh filter AISI303, filter grade 18 µm
Mechanical connections
ISO G½”, NPT ½", UNF 3/4”- 16”
Housing classification IP65 (NEMA 4)
Storage temperature range -40 ... +80 °C (-40 ... +176 °F)
Weight (ISO G½”) 190 g (6.70 oz)
Complies with EMC standard EN61326-1, Electrical equipment for
measurement control and laboratory use - EMC requirements;
Industrial environment
Response time 63 % [90 %] at a gas temperature of +20 °C (+68 °F)
and pressure of 1 bar
-10 ... -80 °CTd 0.5 min [7.5 min]
-80 ... -10 °CTd 2 s [5 s]
PPM VOLUME CONCENTRATION
Measurement range (typical) 0 ... 500 ppm
Accuracy at +20 °C (+68 °F),
1013 mbar
±(0.2 ppm + 20 % of reading)
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
76
2.99
Ø
29.5
1.16
Ø
12
0.47
32.5
1.28
120.5
4.74
G 1/2" ISO 228-1
Ø
33
1.3
AW
30
1.18
Ø
29.5
1.16
128.5
5.06
76
2.99
32.5
1.28
Ø
12
0.47
1/2" NPT
Ø
29.5
1.16
120.5
4.74
32.5
1.28
76
2.99
Ø
12
0.47
3/4"-16 UNF
Typical accuracy +5 °C Td
Not recommended for continuous measurement
Accuracy +2 °C Td
or better
Accuracy not specied
Dew point temperature (°C)
30
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
Temperature of measured gas (°C)
-10 -30 -20 -10 0 10 20 30 40 50 60 70
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