Vaisala HMD70U Service Manual Page 75
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Ref. B210375EN-C ©Vaisala 2011
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.
Operating Environment
Temperature *) -40 ... +60 °C (-40 ... +140 °F)
Relative humidity 0 ... 100 %RH
Pressure *) 0 ... 50 bar
a
(725 psia)
Sample flow rate no effect for measurement accuracy
*) For extended temperature down to -40 °C (-40 °F) or pressure
up to 50 bar
a
(725 psia) the supply voltage must be 24 ... 28 VDC.
Outputs
Analog output (scalable) 4 ... 20 mA (3-wire), 0 ... 1 V/5 V
Resolution for current output 0.002 mA
Resolution for voltage output 0.3 mV
Typical temperature dependence 0.005% of span / °C
Connector 4-pin M8 (IEC 60947-5-2)
connection cable with snap-on or thread locking available
RS232 serial line for service use with DMT142RS cable
General
Sensor Vaisala DRYCAP
®
180D
Measured gases non-corrosive gases
(SF
6
gas with special model)
DEW POINT ACCURACY VS. MEASUREMENT CONDITIONS
Dew point accuracy range for the extended version. Standard
version with dotted line.
Response time 63% [90%] at +20 °C gas temperature and 1 bar
pressure
-60 -> -20 °C T
d
(-76 -> -4 °F T
d
) 5 s [10 s]
-20 -> -60 °C T
d
(-4 -> -76 °F T
d
) 45 s [10 min]
PPM VOLUME CONCENTRATION
Measurement range 70 ... 200 000 ppm
Accuracy at +20 °C (+68 °F), 1013 mbar 7.3 ppm + 9.2% of reading
Accessories
Connection cable for DM70 211917ZZ
Service cable for serial line DMT142RS
Sampling cells
basic sampling cell DMT242SC
with Swagelok 1/4" male connectors DMT242SC2
with quick connector and leak screw DSC74
two-pressure sampling cell DSC74B
cooling/venting coil DMCOIL
See DM70 / Portable Sampling Systems and Sampling Cells for
further information about sampling cells available
Loop powered external display 226476
Dewpoint temperature (°C)
Temperature of measured gas (°C)
Dewpoint accuracy range for the extended version. Standard version with dotted line.
0
40
-60
-80
10
20
30
50
60
70
-10
-20
-30
-50
-40
-70
80
0
-10
-20
-30
-40
10
20 30
40
50
60
Dewpoint measurement range lower limit
Accuracy ±3 °C Td
or better
Water vapor saturation line
Accuracy ±4 °C Td
Std version ±3 °C range
or better
Not recommended area
for continuous measurement
AW24
G1/2” ISO 228/1
58 22.5
92.5
Ø12
Ø28
Dimensions
in mm
Recommended calibration interval
to confirm the specified accuracy 2 years
Operating voltage with voltage output 12 ... 28 VDC
Operating voltage with current output 18 ... 28 VDC
Supply current
normal measurement 10 mA + load current
during self-diagnostics max. 220 mA pulsed
Load for current output max. 500 ohm
Load for voltage output min. 10 kohm
Housing material stainless steel body (AISI316L) plastic
cap(ABS/PC)
Sensor protection stainless steel sintered filter
Mechanical connection G1/2” ISO 228-1 thread
with bonded seal ring (U-seal)
Housing classification IP64 (NEMA 3S)
Storage temperature range -40 ... +80 °C (-40 ... +176 °F)
Weight 118 g (4.16 oz)
Complies with EMC standard EN61326-1, Electrical equipment for
measurement, control and laboratory use - EMC requirements;
Industrial environment.
- HUMIDITY / DEW POINT / 1
- PRESSURE / WEATHER 1
- ACC URATE 2
- Humidity 4
- Dew Point 4
- Mounting Options 9
- Graphical Display of 10
- History and 10
- Measurement Trends 10
- Outputs and Power Supply 10
- Options for Every Need 10
- Flexible Installation 11
- For Moderate Humidities 11
- Vaisala HUMICAP® 12
- Performance 12
- Measurement Trends and 12
- Real Time History 12
- 41 (1.6) 13
- 51 (2.0) 13
- 192 (7.56) 13
- 253 (9.96) 13
- 37.5 (1.48) 14
- 79.5 (3.13) 14
- 99.5 (3.92) 14
- Temperature Transmitters 16
- HMP361 for wall mounting 17
- HMP363 for confined spaces 17
- HMP364 for high pressure 17
- HMP365 for high temperature 18
- HMP367 for high humidities 18
- HMP368 for pressurized 18
- Transmitter 22
- Interchangeable Probe 24
- Fast, On-Site Calibration 26
- Measures both Humidity 26
- Resistant to Chemicals 28
- Vaisala INTERCAP 30
- Humidity and Temperature 30
- Transmitter Series HMW80 30
- HVACApplications 32
- Demanding Applications 34
- Unique Warmed Probe 34
- Vaisala HUMICAP® Sensor 34
- Chambers 36
- Probe HMP60 38
- Vaisala HUMICAP 40
- Probe HMP110 40
- Three Probes 42
- MI70 Link 42
- Reliable and Cost-ecient 47
- HVAC Products 47
- Fast and Easy-to-Use 48
- HMK15 Humidity Calibrator 50
- DTR500 Solar Radiation 54
- Versatile Outputs and 61
- (Wireless) Data Collection 61
- Easy Installation 61
- Probe Specifications 62
- Ensure dry 65
- Measure Humidity Directly 66
- DMT345, Accurate in Hot 66
- OEM Applications 70
- Low Maintenance 72
- Dewpoint temperature (°C) 75
- DMT132 Dewpoint Transmitter 76
- DEW POINT 77
- CALCULATED VARIABLES 77
- Indoor Applications 78
- 110 (4 .33) 79
- 85 (3.35) 79
- 33 (1.30) 79
- DSS70A Portable 82
- Sampling System 82
- Sampling Cells for 82
- Pressurized Processes 82
- Online Reliability 86
- Savings Across the Board 86
- Risk-Free, Greener 86
- Solution 86
- The Fruit of Experience 86
- Multiparameter Transmitter 88
- When Moisture is a Problem 89
- Knowledge is Power 89
- Literally 89
- Transmitter Series for Oil 90
- Moisture in Oil 90
- The Vaisala HUMICAP 91
- Hand-Held 91
- R1/2" ISO7/1 92
- Prevent it 95
- Transmitter for Oil 96
- Features/Benefits 100
- Technical Data 101
- 0 ... 2 % 102
- Interchangeable Probes 104
- Demanding OEM Applications 106
- GMM111 Carbon Dioxide Module 108
- Vaisala CARBOCAP 110
- Technology 110
- Two Sampling Methods 110
- Features/Benefi ts 112
- Demand-controlled Ventilation 114
- GMM112 Carbon Dioxide Module 118
- GMM20W Carbon Dioxide Module 120
- Pressure 122
- PTU300 Models 123
- Mechanics 126
- Accessories 126
- Dimensions 126
- IN CONTROLLED ENVIRONMENTS 127
- Take the Lab to the Field 130
- For more information, visit 131
- Standard PTB330TS 132
- PTB210 Digital Barometer 134
- Calculate 137
- Vaisala BAROCAP® 138
- Accuracy and Stability 138
- Applications 138
- Ideal for outdoor 140
- Carefree maintenance 140
- Operating Environment 142
- Available Options 142
- Figure 1 143
- Figure 2 with Process 143
- Valve Actuator and 143
- Test Jacks 143
- Measuring Acoustic 146
- Precipitation 146
- Wind Measurement 150
- Vaisala Service Offering 152
- Accredited Body 153
- Accredited Parameters 153
- Vaisala Filters 154
- Vaisala Filters continued 155
- Vaisala Contact Information 158
- ASIA AND PACIFIC 159
- NORTH AMERICA 159
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