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M211280EN-C
User Guide
Vaisala HUMICAP
â
Humidity and Temperature
Transmitter Series
HMT130
PUBLISHED BY
Vaisala Oyj
Street address: Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland
Mailing address: P.O. Box 26, FI-00421 Helsinki, Finland
Phone: +358 9 8949 1
Visit our Internet pages at www.vaisala.com.
© Vaisala Oyj 2018
No part of this manual may be
reproduced, published or publicly
displayed in any form or by any
means, electronic or mechanical
(including photocopying), nor
may its contents be modified,
translated, adapted, sold or
disclosed to a third party without
prior written permission of the
copyright holder. Translated
manuals and translated portions
of multilingual documents are
based on the original English
versions. In ambiguous cases, the
English versions are applicable,
not the translations.
The contents of this manual are
subject to change without prior
notice.
Local rules and regulations may
vary and they shall take
precedence over the information
contained in this manual. Vaisala
makes no representations on this
manual’s compliance with the
local rules and regulations
applicable at any given time, and
hereby disclaims any and all
responsibilities related thereto.
This manual does not create any
legally binding obligations for
Vaisala towards customers or end
users. All legally binding
obligations and agreements are
included exclusively in the
applicable supply contract or the
General Conditions of Sale and
General Conditions of Service of
Vaisala.
This product contains software
developed by Vaisala or third
parties. Use of the software is
governed by license terms and
conditions included in the
applicable supply contract or, in
the absence of separate license
terms and conditions, by the
General License Conditions of
Vaisala Group.
Table of Contents
1. About This Document................................................................................... 7
1.1 Version Information.......................................................................................... 7
1.2 Related Manuals................................................................................................ 7
1.3 Documentation Conventions...........................................................................7
1.4 Trademarks........................................................................................................ 8
1.5 Patent Notice.....................................................................................................8
2. Product Overview........................................................................................... 9
2.1 Introduction to HMT130................................................................................... 9
2.2 Accessories........................................................................................................9
2.3 Fixed and Remote Probe Models.................................................................. 10
2.4 Optional Display..............................................................................................10
2.5 Interchangeable Probe................................................................................... 10
2.6 Constant Output Probe.................................................................................. 10
2.7 Transmitter Parts.............................................................................................. 11
2.8 Safety................................................................................................................ 12
2.8.1 ESD Protection..........................................................................................12
2.9 Regulatory Compliances.................................................................................12
3. Installation........................................................................................................ 13
3.1 Opening the Transmitter Cover..................................................................... 13
3.2 Wall Mounting..................................................................................................14
3.3 Installation with Rain Shield...........................................................................15
3.4 Installation with Radiation Shield..................................................................16
3.5 Duct Installation Kit.........................................................................................17
3.5.1 Probe Assembly with Duct Installation Kit........................................... 18
3.5.2 Drilling Instructions for Duct Installation Kit.........................................19
3.6 Probe Mounting Clamp...................................................................................19
3.7 Probe Mounting Flange.................................................................................20
3.8 Connections......................................................................................................21
3.8.1 Wiring....................................................................................................... 22
3.8.2 RS-485 Bus Termination.........................................................................23
4. Serial Line Operation.................................................................................. 24
4.1 Using the Service Port................................................................................... 24
4.2 Serial Interface Settings.................................................................................24
4.3 Installing the Driver for the USB Service Cable.......................................... 24
4.4 Connecting with a Computer........................................................................ 25
4.5 List of Serial Commands................................................................................ 27
4.6 Device Information and Status..................................................................... 28
4.7 Serial Line Output and Communication...................................................... 32
4.8 Calibration Commands.................................................................................. 34
4.9
Configuring Serial Line Operation................................................................37
4.10 Measurement Parameter Configuration Commands................................. 39
Table of Contents
1
4.11 Analog Output Configuration Commands..................................................40
4.12 Relay Output Configuration..........................................................................43
4.13 Other Commands...........................................................................................45
4.14 User Port (RS-485) Commands....................................................................49
5. Maintenance....................................................................................................53
5.1 Removing and Fastening Fixed Humidity Probe........................................53
5.2 Removing and Fastening Remote Humidity Probe....................................54
5.3 Testing Analog Outputs.................................................................................55
5.4 Replacing the HUMICAPâ Sensor................................................................56
6. Calibration and Adjustment..................................................................... 57
6.1 Calibration and Adjustment Overview ........................................................57
6.2 Push-Button Calibration................................................................................ 58
6.2.1 Adjusting Humidity and Temperature with Push Buttons..................58
6.3 Adjusting RH and T with MI70 Hand-Held Indicator...................................61
6.3.1 Field Checking and Adjustment Using a Calibrated
Reference Probe......................................................................................62
6.3.2 1-Point Adjustment Using a Calibrator................................................. 63
6.3.3 2-Point Adjustment Using a Calibrator.................................................63
6.3.4 LiCl-NaCl Adjustment.............................................................................64
6.3.5 Temperature Field Check and Adjustment Using a
Calibrated Reference Probe...................................................................65
6.4 Adjustment with HMI41..................................................................................65
6.4.1 Connections and Selecting the Calibrator Function...........................67
6.4.2 Adjusting Oset and Gain with HMI41..................................................68
6.4.3 Troubleshooting HMI41 Adjustment......................................................72
7. Troubleshooting............................................................................................ 74
7.1 Error Codes......................................................................................................74
7.2 Solving Typical Problems...............................................................................75
7.3 Analog Output Error
Notification.................................................................76
8. Technical Data................................................................................................77
8.1 Specifications..................................................................................................77
8.2 Spare Parts and Accessories......................................................................... 79
8.3 Transmitter Dimensions.................................................................................80
Appendix A:
Calculation Formulas...................................................................82
A.1 Calculation Formulas Overview.................................................................... 82
A.2 Dewpoint Temperature..................................................................................82
A.3 Dew/frostpoint Temperature Calculation....................................................83
A.4 Mixing Ratio Calculation................................................................................83
A.5 Saturation Vapor Pressure Calculation........................................................84
HMT130 User Guide M211280EN-C
2
A.6 Water Vapor Pressure Calculation............................................................... 84
A.7 Absolute Humidity Calculation.....................................................................85
A.8 Enthalpy Calculation...................................................................................... 85
A.9 Accuracies of Calculated Variables.............................................................. 85
A.9.1 Accuracy of Dewpoint Temperature °C................................................85
A.9.2 Accuracy of Mixing Ratio g/kg (Ambient Pressure 1013 mbar)........ 86
A.9.3 Accuracy of Wet Bulb Temperature °C.................................................86
A.9.4 Accuracy of Absolute Humidity g/m
3
...................................................87
Index...............................................................................................................................89
Warranty........................................................................................................................91
Technical Support......................................................................................................91
Recycling....................................................................................................................... 91
Table of Contents
3
List of Figures
Figure 1 Main Transmitter Parts......................................................................................11
Figure 2 Opening the Transmitter Cover.....................................................................13
Figure 3 Wall Mounting Measurements.......................................................................14
Figure 4 Installation with Rain Shield...........................................................................15
Figure 5 Probe Installation with Radiation Shield.................................................... 16
Figure 6 Probe Installation with the Duct Installation Kit.......................................17
Figure 7 Probe Assembly with Duct Installation Kit................................................ 18
Figure 8 Drilling Instructions.......................................................................................... 19
Figure 9 Optional Probe Mounting Clamp.................................................................20
Figure 10 Optional Probe Mounting Flange................................................................20
Figure 11 HMT130 Component Board............................................................................ 21
Figure 12 Power Supply and Voltage Outputs (A), and Serial
Communication and Relay (B)..................................................................... 22
Figure 13 Removing the Humidity Probe (Fixed Probe Model).............................53
Figure 14 Removing the Humidity Probe (Remote Probe Model)........................54
Figure 15 HMT130 Output Voltage Measurement......................................................55
Figure 16 Adjustment Buttons........................................................................................ 58
Figure 17 Location of the HMI41 Calibration Connector..........................................66
Figure 18 Fixed Probe Model Dimensions in mm(in)............................................... 80
Figure 19 Remote Probe Model Dimensions in mm(in)............................................ 81
HMT130 User Guide M211280EN-C
4
List of Tables
Table 1 Document Versions.............................................................................................7
Table 2 Related Manuals...................................................................................................7
Table 3 Applicable Patents..............................................................................................8
Table 4 Wiring Table........................................................................................................22
Table 5 Default Serial Interface Settings...................................................................24
Table 6 List of Serial Commands................................................................................. 27
Table 7 ? Command.........................................................................................................28
Table 8 Calcs Command................................................................................................ 29
Table 9 Cdate Command...............................................................................................30
Table 10 Ctext Command................................................................................................ 30
Table 11 Aout Command.................................................................................................. 31
Table 12 System Command.............................................................................................32
Table 13 Vers Command.................................................................................................. 32
Table 14 R Command........................................................................................................32
Table 15 S Command........................................................................................................ 33
Table 16 Intv Command................................................................................................... 33
Table 17 Send Command.................................................................................................34
Table 18 CRH Command..................................................................................................34
Table 19 CRHCLR Command.......................................................................................... 35
Table 20 CT Command......................................................................................................35
Table 21 CTCLR Command..............................................................................................36
Table 22 ACAL Command................................................................................................37
Table 23 SERI Command..................................................................................................37
Table 24 ECHO Command............................................................................................... 38
Table 25 SMODE Command............................................................................................38
Table 26 ENV Command..................................................................................................39
Table 27 AMODE Command...........................................................................................40
Table 28 AERR Command...............................................................................................40
Table 29 ASEL Command................................................................................................. 41
Table 30 ATEST Command..............................................................................................43
Table 31 RSEL Command................................................................................................ 43
Table 32 RMODE Command........................................................................................... 44
Table 33 ROUT Command...............................................................................................44
Table 34 DSEL Command................................................................................................ 45
Table 35 FORM Command...............................................................................................46
Table 36 HELP Command................................................................................................ 47
Table 37 ERRS Command................................................................................................ 47
Table 38 SAVE Command................................................................................................ 47
Table 39 RESTORE Command........................................................................................48
Table 40 RESET Command..............................................................................................48
Table 41 FRESTORE Command..................................................................................... 48
Table 42 UNIT Command.................................................................................................49
Table 43 SERI Command................................................................................................. 49
Table 44 SERI2 Command...............................................................................................50
Table 45 ECHO Command...............................................................................................50
List of Tables
5
Table 46 SMODE Command............................................................................................50
Table 47 SDELAY Command...........................................................................................50
Table 48 INTV Command.................................................................................................. 51
Table 49 ADDR Command................................................................................................51
Table 50 SEND Command................................................................................................52
Table 51 OPEN Command............................................................................................... 52
Table 52 CLOSE Command..............................................................................................52
Table 53 Common Problems During HMI41 Adjustment and Their
Remedies.............................................................................................................72
Table 54 Error Codes, Descriptions and Texts............................................................74
Table 55 Problems and Solutions.................................................................................. 75
Table 56 Measurement Performance............................................................................77
Table 57 Operating Environment...................................................................................78
Table 58 Inputs and Outputs...........................................................................................78
Table 59 Mechanical Specifications.............................................................................. 78
Table 60 Spare Parts and Accessories..........................................................................79
Table 61 Temperature Dependence for A, m, and Tn...............................................82
Table 62 Temperature Dependence for A, m, and Tn...............................................83
Table 63 Accuracy of Dewpoint Temperature °C...................................................... 85
Table 64 Accuracy of Mixing Ratio g/kg (Ambient Pressure 1013 mbar)...........86
Table 65 Accuracy of Wet Bulb Temperature °C.......................................................86
Table 66 Accuracy of Absolute Humidity g/m
3
......................................................... 87
HMT130 User Guide M211280EN-C
6
1. About This Document
1.1 Version Information
Table 1 Document Versions
Document Code Date Description
M211280EN-C January 2018 This version. Factory calibration uncertainty specification
updated. Spare parts list updated. Document template
updated, content structure revised.
M211280EN-B June 2013 Previous version. New probe options added. Installation
and operating instructions updated.
M211280EN-A November 2010 First version.
1.2 Related Manuals
Table 2 Related Manuals
Document Code Description
M210185EN Humidity Calibrator HMK15 User's Guide
M210297EN Hand-held Humidity and Temperature Meter
HM70 User's Guide
M210316EN HMI41 Indicator and HMP41/45/46 Probes
Operating Manual
M211060EN HMP60 and HMP110 Series Probe User's Guide
1.3 Documentation Conventions
Warning alerts you to a serious hazard. If you do not read and
follow instructions carefully at this point, there is a risk of injury or even death.
WARNING!
Caution warns you of a potential hazard. If you do not read and
follow instructions carefully at this point, the product could be damaged or
important data could be lost.
CAUTION!
Chapter 1 – About This Document
7
Note highlights important information on using the product.
Tip gives information for using the product more eciently.
Lists tools needed to perform the task.
Indicates that you need to take some notes during the task.
1.4 Trademarks
Vaisalaâ and HUMICAPâ are registered trademarks of Vaisala Oyj.
1.5
Patent Notice
This product is protected by the following patents and their corresponding national rights:
Table 3 Applicable Patents
Patent Patent Number
Finnish patent 98861
French patent 6650303
German patent 69418174
Japanese patent 3585973
UK patent 0665303
U.S. patent 5607564
HMT130 User Guide M211280EN-C
8
2. Product Overview
2.1 Introduction to HMT130
Vaisala HMT130 Series HUMICAPâ Humidity and Temperature Transmitters measure relative
humidity and temperature and outputs the measurements to voltage outputs and RS-485.
Other quantities, such as dewpoint (T
d
) can be calculated from the basic RH and T values
according to the device configuration. HMT130 is powered with a 10 ... 35 VDC or a 24 VAC
supply (15 ... 35 VDC or 24 VAC required when using 0 ... 10 V output). It outputs two analog
voltage signals with nominal 0 ... 10 V range. HMT130 has also an RS-485 digital interface and a
relay.
HMT130 transmitter's output quantities are
configurable. Available quantities for outputs are
limited to two at the time. These two quantities can be used freely at any outputs (display,
service port and voltage outputs).
Available quantities are RH, T, T
d
, T
d/f
, a, x, h, T
w
, p
ws
, and p
w
.
The default output quantities are set at the factory during order time. These factory preset
quantity selections can be changed afterwards via service port if necessary.
The HMT130T and HMT130H models are single-parameter transmitters. The only output
quantity of HMT130T is temperature. The output of the HMT130H can be
configured to be any
one of the humidity-related quantities (RH, T
d
, T
d/f
, a, x, h, T
w
, p
ws
and p
w
).
Vaisala Relative Humidity Measurement Instruments
The Vaisala range of relative humidity measurement instruments covers all the applications
from ventilation to process control in demanding conditions. For more information about other
Vaisala relative humidity instruments, please contact your Vaisala representative or visit
www.vaisala.com.
2.2
Accessories
The following accessories are optionally available:
• Duct installation kit
• Rain shield with installation kit
• Rain/solar radiation shield installation kit (for pole installation)
• Probe mounting
flange
• Probe mounting clamp
• Constant output probe (HMP1100REF, gives constant RH and T values)
Chapter 2 – Product Overview
9
2.3 Fixed and Remote Probe Models
The transmitter is available either with a fixed probe directly attached to the transmitter
housing or a remote probe with dierent (3/5/10/20 m) cable lengths. All extension cables
can be easily cascaded in order to obtain longer reach: see Spare Parts and Accessories
(page 79).
2.4 Optional Display
The transmitter is also available with an optional graphical 128*64 pixel resolution LCD display.
The display shows the measurement results of selected parameters in selected units (defined
when ordering the transmitter). The parameters are displayed simultaneously on two separate
rows on the display.
2.5 Interchangeable Probe
The HMP110 relative humidity probe used in the transmitter is fully interchangeable. You can
easily remove the probe and replace it with a new one without having to adjust the transmitter.
You have the following options when purchasing a new probe from Vaisala:
• Order a new probe and keep your current one.
• Order a new probe and return the old one to Vaisala (replacement probe).
Only probes that have a compatible digital output (VDIGI mode) can be used with
the transmitter. Compatible probes have the letter "V" as the first letter in their
order code. The order code is written on the probe.
2.6 Constant Output Probe
The constant output probe HMP110REF is a testing accessory that can be used to check
transmitter's functions and measurement signal transfer chain all the way to the control
system. The constant output probe does not measure humidity and temperature; instead, it
outputs constant humidity and temperature readings.
The values output by the constant output probe are
specified when ordering. These values are
written on an additional label on the probe body.
The procedure for using the constant output probe is simply to replace the original probe for
the duration of the testing:
1. Disconnect the normal probe from transmitter.
2. Connect the constant output probe to the transmitter.
3. Check that all used outputs (analog, display, serial line) show the correct measurement
values.
4. After checking the outputs, disconnect the constant output probe and reconnect the
original probe.
HMT130 User Guide M211280EN-C
10
The transmitter goes to the error state for a short time when the probe is
changed. This is normal.
2.7 Transmitter Parts
Figure 1 (page 11) shows the main transmitter parts. On the left is a remote probe model
without display, and on the right is a
fixed probe model with the optional display.
2
5
3
4
1
Figure 1 Main Transmitter Parts
1
Transmitter enclosure
2 Probe cable
3 HMP110 probe
4 Plastic grid filter
5 Cable bushing: cable gland, cable grommet, or conduit fitting
Chapter 2 – Product Overview
11
More Information
‣
Spare Parts and Accessories (page 79)
2.8 Safety
The transmitter delivered to you has been tested for safety and approved as shipped from the
factory. Note the following precautions:
Do not modify the unit or use it in ways not described in the
documentation. Improper modification may lead to safety hazards, equipment
damage, failure to perform according to specification, or decreased equipment
lifetime.
CAUTION!
2.8.1 ESD Protection
Electrostatic Discharge (ESD) can cause immediate or latent damage to electronic circuits.
Vaisala products are adequately protected against ESD for their intended use. It is possible to
damage the product, however, by delivering electrostatic discharges when touching,
removing, or inserting any objects inside the equipment housing.
To make sure you are not delivering high static voltages yourself:
• Handle ESD sensitive components on a properly grounded and protected ESD workbench.
• When an ESD workbench is not available, ground yourself to the equipment chassis with a
wrist strap and a resistive connection cord.
• If you are unable to take either of the above precautions, touch a conductive part of the
equipment chassis with your other hand before touching ESD sensitive components.
• Always hold component boards by the edges and avoid touching the component
contacts.
2.9
Regulatory Compliances
Vaisala HUMICAPâ Humidity and Temperature Transmitter Series HMT130 is in conformity with
the provisions of the following EU directives:
• EMC-Directive (2004/108/EC)
Conformity is shown by compliance with the following standards:
• EN 61326-1: Electrical equipment for measurement, control and laboratory use – EMC
requirements – for use in industrial locations.
• EN 55022 + Am1: Information technology equipment – Radio disturbance characteristics –
Limits and methods of measurement.
HMT130 User Guide M211280EN-C
12
3. Installation
3.1 Opening the Transmitter Cover
Figure 2 Opening the Transmitter Cover
To open the transmitter cover:
1. If the transmitter is not mounted already, hold it against a flat surface.
2. Push on the cover with your thumb, and pull the bottom part of the cover towards
yourself.
Chapter 3 – Installation
13
3.2 Wall Mounting
To mount the transmitter on a wall:
1. Remove the transmitter cover.
2. Make sure that the transmitter is correctly aligned and attach it directly to the wall with up
to four screws (not included in the package). Figure 3 (page 14) shows the distances
between attachment points.
It is possible to damage the display when tightening the
screws, as there is not much room between the upper fastening holes and
the exposed display component. Be particularly careful when using a
cordless drill.
CAUTION!
Figure 3 Wall Mounting Measurements
Select the size and type of the fastening screws according to the wall
material (for example, wood or stone). Even though using all four screws is
strongly recommended, the transmitter enclosure fastening holes are initially
covered with a thin plastic membrane, so less than four screws could be also
be used without sacrificing the ingress protection (IP) class of the enclosure.
The diameter of the fastening screws is typically between 3.5 and 4 mm.
More Information
‣
Opening the Transmitter Cover (page 13)
HMT130 User Guide M211280EN-C
14
3.3 Installation with Rain Shield
The installation kit with rain shield (Vaisala order code: 215109) includes a metal mounting
plate and a rain shield for the transmitter.
Figure 4 Installation with Rain Shield
To install the transmitter with the rain shield:
1. Fasten the metal mounting plate to the wall or pole with screws. Note the arrow on the
mounting plate. Attach the mounting plate with the arrow pointing upwards.
2. Drill holes for the screws in the transmitter frame, and fasten the transmitter to the metal
mounting plate with four (M4) screws.
3. Fasten the rain shield to the metal mounting plate with two (M6) mounting screws.
Chapter 3 – Installation
15
3.4 Installation with Radiation Shield
1
1
2
1
3
1
4
1
5
DTR504 with probe installation kit (Vaisala
order code: DTR504A) includes the rain/
solar radiation shield DTR504 and a plastic
installation support for the humidity probe.
If you already have the DTR504 shield and
need only the installation support for the
probe, the installation support is available
with Vaisala order code 227777.
Figure 5 Probe Installation with Radiation
Shield
1 DTR504
2 Probe
3 Plastic nut
4 Installation support (order code:
227777)
5 Cable tie
To install the probe with a radiation shield:
1. Fasten the probe (item 2 in Figure 5 (page 16)) to the installation support with a cable tie
(item 5).
2. Insert and attach the support to the radiation shield by tightening the plastic nut (3).
3. Attach the entire radiation shield/probe assembly to a pole mast (pole mast diameter:
30 ... 60 mm/1.2 ... 2.3") with a U-bolt and a support arm.
HMT130 User Guide M211280EN-C
16
3.5 Duct Installation Kit
The duct installation kit includes a plastic pipe with a flange (Vaisala order code: 215619). To
install the HMP110 probe with the duct installation kit, drill a hole to the duct wall, assemble the
probe to the duct installation kit, slide the probe head through the hole, and attach the flange
to the duct wall with four screws.
24
L
1
Figure 6 Probe Installation with the Duct Installation Kit
1
Tension screw
The installation depth (distance L) can be adjusted and locked in place with the tension screw.
Chapter 3 – Installation
17
3.5.1 Probe Assembly with Duct Installation Kit
1
2
3
Figure 7 Probe Assembly with Duct Installation Kit
1 HMP110
2 Duct installation kit
3 Probe cable
1. Slide the probe cable through the duct installation kit plastic pipe.
2. Attach the probe cable to the HMP110 Humidity Probe.
3. Attach probe assembly to the duct.
HMT130 User Guide M211280EN-C
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