Vaisala HMT130 Manual

Vaisala HMT130 Manual
M211280EN-C
User Guide
â
Vaisala HUMICAP 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
Table of Contents
1.
1.1
1.2
1.3
1.4
1.5
About This Document................................................................................... 7
Version Information.......................................................................................... 7
Related Manuals................................................................................................ 7
Documentation Conventions........................................................................... 7
Trademarks........................................................................................................ 8
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.
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
Serial Line Operation.................................................................................. 24
Using the Service Port................................................................................... 24
Serial Interface Settings.................................................................................24
Installing the Driver for the USB Service Cable.......................................... 24
Connecting with a Computer........................................................................ 25
List of Serial Commands................................................................................ 27
Device Information and Status..................................................................... 28
Serial Line Output and Communication...................................................... 32
Calibration Commands.................................................................................. 34
Configuring Serial Line Operation................................................................ 37
Measurement Parameter Configuration Commands................................. 39
1
HMT130 User Guide
4.11
4.12
4.13
4.14
5.
5.1
5.2
5.3
5.4
M211280EN-C
Analog Output Configuration Commands..................................................40
Relay Output Configuration..........................................................................43
Other Commands........................................................................................... 45
User Port (RS-485) Commands....................................................................49
Maintenance....................................................................................................53
Removing and Fastening Fixed Humidity Probe........................................ 53
Removing and Fastening Remote Humidity Probe....................................54
Testing Analog Outputs.................................................................................55
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 Offset and Gain with HMI41..................................................68
6.4.3
Troubleshooting HMI41 Adjustment......................................................72
7.
7.1
7.2
7.3
Troubleshooting............................................................................................ 74
Error Codes......................................................................................................74
Solving Typical Problems...............................................................................75
Analog Output Error Notification.................................................................76
8.
8.1
8.2
8.3
Technical Data................................................................................................ 77
Specifications.................................................................................................. 77
Spare Parts and Accessories......................................................................... 79
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
2
Table of Contents
A.6
A.7
A.8
A.9
A.9.1
A.9.2
A.9.3
A.9.4
Water Vapor Pressure Calculation............................................................... 84
Absolute Humidity Calculation..................................................................... 85
Enthalpy Calculation...................................................................................... 85
Accuracies of Calculated Variables.............................................................. 85
Accuracy of Dewpoint Temperature °C................................................ 85
Accuracy of Mixing Ratio g/kg (Ambient Pressure 1013 mbar)........ 86
Accuracy of Wet Bulb Temperature °C.................................................86
Accuracy of Absolute Humidity g/m3...................................................87
Index...............................................................................................................................89
Warranty........................................................................................................................ 91
Technical Support...................................................................................................... 91
Recycling....................................................................................................................... 91
3
HMT130 User Guide
M211280EN-C
List of Figures
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
4
Main Transmitter Parts......................................................................................11
Opening the Transmitter Cover.....................................................................13
Wall Mounting Measurements.......................................................................14
Installation with Rain Shield...........................................................................15
Probe Installation with Radiation Shield.................................................... 16
Probe Installation with the Duct Installation Kit.......................................17
Probe Assembly with Duct Installation Kit................................................ 18
Drilling Instructions.......................................................................................... 19
Optional Probe Mounting Clamp.................................................................20
Optional Probe Mounting Flange................................................................20
HMT130 Component Board............................................................................ 21
Power Supply and Voltage Outputs (A), and Serial
Communication and Relay (B)..................................................................... 22
Removing the Humidity Probe (Fixed Probe Model).............................53
Removing the Humidity Probe (Remote Probe Model)........................54
HMT130 Output Voltage Measurement......................................................55
Adjustment Buttons........................................................................................ 58
Location of the HMI41 Calibration Connector.......................................... 66
Fixed Probe Model Dimensions in mm(in)............................................... 80
Remote Probe Model Dimensions in mm(in)............................................ 81
List of Tables
List of Tables
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9
Table 10
Table 11
Table 12
Table 13
Table 14
Table 15
Table 16
Table 17
Table 18
Table 19
Table 20
Table 21
Table 22
Table 23
Table 24
Table 25
Table 26
Table 27
Table 28
Table 29
Table 30
Table 31
Table 32
Table 33
Table 34
Table 35
Table 36
Table 37
Table 38
Table 39
Table 40
Table 41
Table 42
Table 43
Table 44
Table 45
Document Versions.............................................................................................7
Related Manuals...................................................................................................7
Applicable Patents..............................................................................................8
Wiring Table........................................................................................................22
Default Serial Interface Settings................................................................... 24
List of Serial Commands................................................................................. 27
? Command.........................................................................................................28
Calcs Command................................................................................................ 29
Cdate Command............................................................................................... 30
Ctext Command................................................................................................ 30
Aout Command.................................................................................................. 31
System Command.............................................................................................32
Vers Command.................................................................................................. 32
R Command........................................................................................................ 32
S Command........................................................................................................ 33
Intv Command................................................................................................... 33
Send Command.................................................................................................34
CRH Command.................................................................................................. 34
CRHCLR Command.......................................................................................... 35
CT Command......................................................................................................35
CTCLR Command..............................................................................................36
ACAL Command................................................................................................37
SERI Command..................................................................................................37
ECHO Command............................................................................................... 38
SMODE Command............................................................................................ 38
ENV Command.................................................................................................. 39
AMODE Command...........................................................................................40
AERR Command...............................................................................................40
ASEL Command................................................................................................. 41
ATEST Command.............................................................................................. 43
RSEL Command................................................................................................ 43
RMODE Command........................................................................................... 44
ROUT Command...............................................................................................44
DSEL Command................................................................................................ 45
FORM Command...............................................................................................46
HELP Command................................................................................................ 47
ERRS Command................................................................................................ 47
SAVE Command................................................................................................ 47
RESTORE Command........................................................................................48
RESET Command..............................................................................................48
FRESTORE Command..................................................................................... 48
UNIT Command.................................................................................................49
SERI Command................................................................................................. 49
SERI2 Command............................................................................................... 50
ECHO Command...............................................................................................50
5
HMT130 User Guide
Table 46
Table 47
Table 48
Table 49
Table 50
Table 51
Table 52
Table 53
Table 54
Table 55
Table 56
Table 57
Table 58
Table 59
Table 60
Table 61
Table 62
Table 63
Table 64
Table 65
Table 66
6
M211280EN-C
SMODE Command............................................................................................50
SDELAY Command...........................................................................................50
INTV Command.................................................................................................. 51
ADDR Command................................................................................................51
SEND Command................................................................................................52
OPEN Command............................................................................................... 52
CLOSE Command..............................................................................................52
Common Problems During HMI41 Adjustment and Their
Remedies.............................................................................................................72
Error Codes, Descriptions and Texts............................................................74
Problems and Solutions.................................................................................. 75
Measurement Performance............................................................................ 77
Operating Environment...................................................................................78
Inputs and Outputs...........................................................................................78
Mechanical Specifications.............................................................................. 78
Spare Parts and Accessories..........................................................................79
Temperature Dependence for A, m, and Tn...............................................82
Temperature Dependence for A, m, and Tn...............................................83
Accuracy of Dewpoint Temperature °C...................................................... 85
Accuracy of Mixing Ratio g/kg (Ambient Pressure 1013 mbar)........... 86
Accuracy of Wet Bulb Temperature °C.......................................................86
Accuracy of Absolute Humidity g/m3......................................................... 87
Chapter 1 – About This Document
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! 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.
CAUTION! 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.
7
HMT130 User Guide
M211280EN-C
Note highlights important information on using the product.
Tip gives information for using the product more efficiently.
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
8
Chapter 2 – Product Overview
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 (Td) 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, Td, Td/f, a, x, h, Tw, pws, and pw.
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, Td, Td/f, a, x, h, Tw, pws and pw).
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)
9
HMT130 User Guide
M211280EN-C
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 different (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.
10
Chapter 2 – Product Overview
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.
1
2
3
4
Figure 1
1
2
3
4
5
5
Main Transmitter Parts
Transmitter enclosure
Probe cable
HMP110 probe
Plastic grid filter
Cable bushing: cable gland, cable grommet, or conduit fitting
11
HMT130 User Guide
M211280EN-C
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:
CAUTION! 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.
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.
12
Chapter 3 – Installation
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.
13
HMT130 User Guide
M211280EN-C
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.
CAUTION! 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.
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)
14
Chapter 3 – Installation
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.
15
HMT130 User Guide
M211280EN-C
3.4 Installation with Radiation Shield
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.
1
3
1
4
1
51
Figure 5
Shield
1
2
3
4
5
Probe Installation with Radiation
DTR504
Probe
Plastic nut
Installation support (order code:
227777)
Cable tie
2
1
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.
16
Chapter 3 – Installation
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
1
L
Figure 6
1
Probe Installation with the Duct Installation Kit
Tension screw
The installation depth (distance L) can be adjusted and locked in place with the tension screw.
17
HMT130 User Guide
M211280EN-C
3.5.1 Probe Assembly with Duct Installation Kit
1
2
3
Figure 7
1
2
3
Probe Assembly with Duct Installation Kit
HMP110
Duct installation kit
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.
18
Chapter 3 – Installation
3.5.2 Drilling Instructions for Duct Installation Kit
.2
Ø3
24
42
Ø
3
2
1
Figure 8
1
2
3
Drilling Instructions
Mounting screw
Tension screw
HMP110 assembled in duct installation kit plastic pipe
To drill the holes for the duct installation kit:
1. Use a 24-mm drill bit to drill a hole to the duct wall for the humidity probe.
2. Drill holes for the duct installation kit mounting screws around the hole in a square
arrangement, 42 mm apart from each other. Use a 3.2-mm drill bit to drill the holes for the
mounting screws (four ST4.2×16-C-Z DIN 7981 screws).
3.6 Probe Mounting Clamp
The optional mounting clamp makes it easy to install the probe on the wall of the
measurement environment. The probe can be detached for calibration simply by loosening the
lower screw. You can order a single clamp (Vaisala order code 225501) or a set of 10 clamps
(226067).
Installing the entire probe in the measurement environment prevents heat conduction to the
sensor, and is the recommended installation method.
19
HMT130 User Guide
Figure 9
M211280EN-C
Optional Probe Mounting Clamp
CAUTION! Attaching the probe mounting clamp to a conductive wall material
should be avoided, since the potential galvanic connection to the power
supplies and uncontrolled earth current loops could cause measurement errors
or even damage to the transmitter.
3.7 Probe Mounting Flange
The probe mounting flange (Vaisala order code: 226061) is a general purpose mounting flange
for 12 mm diameter probes. It can be used to hold the HMP110 probe in a through-wall
installation.
The coaxial silicone plug that is delivered with the flange is not suitable for use
with the transmitter's probe cable.
Figure 10
20
Optional Probe Mounting Flange
Chapter 3 – Installation
3.8 Connections
1
2
C
A
L
RH
T
ADJ
3
CH2
CH1
SGND
+
4
12
ON
485 TERM
7
GND
REL
VIN-
SHEILD
485+
VIN+
485SERVICE PORT
6
8
9
5
Figure 11
1
2
3
4
5
6
7
8
9
HMT130 Component Board
Optional LCD display
Indicator LEDs
Adjustment buttons
Service port
RS-485 bus termination switch
Relay terminals
RS-485 bus
Analog outputs
Power supply connectors
21
HMT130 User Guide
M211280EN-C
Figure 11 (page 21) shows the main parts of the HMT130 component board, including the wiring
connectors.
3.8.1 Wiring
A
1
2
3
4
5
6
SGND
CH1
CH2
SHIELD
VIN-
VIN+
B
7 4858 485+
9 GND
10
-
REL
+
11
V
10 ... 35 VDC
24 VAC
V
Figure 12 Power Supply and Voltage Outputs (A), and Serial Communication and Relay (B)
15 ... 35 VDC or 24 VAC is needed when using the 0 ... 10 V output.
Table 4
Wiring Table
Terminal 1)
Description
1 2)
SGND (signal ground)
2
CH1+ (signal +)
3
CH2+ (signal +)
4
5
Cable shield (optional)
2)
Vin- (power supply - or VAC)
6
Vin+ (power supply + or VAC)
7
485-
8
9
22
485+
2)
GND (ground)
Chapter 3 – Installation
Terminal 1)
Description
10
Relay
11
Relay
1)
2)
Numbers 1 ... 6 in the first column of the wiring table refer to section (A) and numbers 7 ... 11
to section (B) in Figure 12 (page 22).
There is an internal connection between numbers 1 and 5 on section (A) and number 9 on
section (B).
To connect the wiring:
1. Remove the transmitter cover as instructed in Opening the Transmitter Cover (page 13).
2. Insert the signal wires through the selected cable gland/conduit fitting in the bottom of
the transmitter or alternatively through the rubber grommet at the back side of the
transmitter.
3. Connect the wires as indicated in Figure 12 (page 22) and in Table 4 (page 22). Suitable
wire size is 0.5 ... 1.5 mm2.
4. Switch on the RS-485 bus termination switch if necessary.
5. Close the cover by keeping it slightly tilted and first attaching it to the fixing snaps at the
top of the enclosure base and then pushing the lower part of the cover firmly forward
until it locks. The transmitter is ready for use.
More Information
‣ RS-485 Bus Termination (page 23)
3.8.2 RS-485 Bus Termination
If you use RS-485 to connect just one HMT130 to a master computer, enable the internal
termination of HMT130 by switching switches 1 and 2 ON. Make sure that the master's end of
the line is also terminated (by using master's internal termination or with a separate
terminator).
If you are connecting many transmitters to the same RS-485 bus, make sure that switches 1
and 2 are OFF and terminate the bus with separate terminators at both ends. This allows
removing any transmitter without blocking the bus operation.
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HMT130 User Guide
M211280EN-C
4. Serial Line Operation
4.1 Using the Service Port
The transmitter's motherboard has an 8-pin RJ-45 connector for service use. The service port
uses RS-232 signaling levels. Vaisala offers an optional USB cable (Vaisala order code 219685)
for connecting the transmitter to your computer.
The service port is intended for short-term use such as calibration. For permanent
installation, use the analog output.
Connecting a computer to the service port may cause erroneous analog output
because of a possible ground loop. Use the service port for service only and
disconnect the computer after the service operation.
The cable can also provide operation power to the transmitter, so the wires at the screw
terminals need not to be connected in order to operate the transmitter.
If you have not used the transmitter's USB cable before, install the driver that came with the
cable.
4.2 Serial Interface Settings
Table 5
Default Serial Interface Settings
Property
Description/Value
Bit rate
19200
Parity
None
Data bits
8
Stop bits
1
Flow control
None
4.3 Installing the Driver for the USB Service Cable
Only Windowsâ operating systems are supported by the driver of the USB
service cable.
1. Connect the USB service cable to a USB port on your computer. Windowsâ detects the
new device and installs the appropriate driver.
24
Chapter 4 – Serial Line Operation
2. Open Devices and Printers from the Windowsâ Start menu. Use search to find it if
necessary (search for "devices").
3. Locate the cable in the list of devices:
• If the device is listed as Vaisala USB Device with a COM port number in brackets, the
cable is ready for use. Note the COM port number, you will need it later.
• If the device is listed as Vaisala USB Instrument Cable without a COM port number
listed, you must install the driver manually.
4. To install the driver manually:
a. Disconnect the USB service cable from the computer.
b. Download the Vaisala USB driver at http://www.vaisala.com/software (select the
appropriate USB Instrument Driver Setup for your cable).
c. Run the USB driver installation program Vaisala USB Device Driver
Setup.exe. Accept the installation defaults.
d. Go back to and verify that the driver installation works as expected.
4.4 Connecting with a Computer
• Vaisala USB service cable (order code 219685)
• Computer with:
• Windows operating system
• Terminal application (for example PuTTy, available from http://
www.vaisala.com/software )
• Free USB port
• Driver for Vaisala USB service cable installed (available on the cable
installation media and at http://www.vaisala.com/software)
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HMT130 User Guide
M211280EN-C
The steps below describe how to connect to the transmitter using the PuTTY terminal
application for Windows and a USB computer connection cable.
1. If you have not used the Vaisala USB cable before, install the driver before attempting to
use the cable.
2. Connect the USB cable between your computer and the transmitter's service port.
3. Start the PuTTY application.
4. Select Connection > Serial & USB and check that the correct COM port is selected in the
Serial or USB line to connect to field. If you are using the PuTTY terminal application
supplied by Vaisala, you can press the USB Finder button to open the Vaisala USB
Instrument Finder program.
5. Check that the other serial settings are correct for your connection, and change if
necessary. Flow control should be set to None unless you have a reason to change it.
6. Select Terminal. Use the following settings:
• Local Echo
Select Force on. This setting ensures that your typing is shown on the session
window.
• Send line ends with line feeds (CR+LF)
Make sure this option is not selected. Enabling line end sending with line feeds
can cause issues with the terminal connection.
26
Chapter 4 – Serial Line Operation
7. To open the connection window and start using the serial line, select Open.
If PuTTY is unable to open the serial port you selected, it shows you an error
message instead. If this happens, restart PuTTY and check the settings.
4.5 List of Serial Commands
All commands can be issued either in uppercase or lowercase.
The notation <cr> refers to pressing the carriage return (ENTER) key on your computer
keyboard. Enter a <cr> to clear the command buffer before starting to enter commands.
Whenever you change any of the parameters and want to store the changes permanently, use
the SAVE command.
Table 6
List of Serial Commands
Command
Description
?
Show transmitter information
??
Show transmitter information (POLL mode)
acal
Calibrate analog outputs
addr
Set/show device address
aerr
Set/show analog output error levels
amode
Set/show analog output mode
aout
Show analog output status
asel
Set/show analog output quantities and scaling
atest
Test analog outputs
calcs
Set/show measured quantities
cdate
Set/show calibration date
close
Start POLL mode
crh
Calibrate probe RH
crhclr
Restore probe RH factory calibration
ct
Calibrate probe T
ctclr
Restore probe T factory calibration
ctext
Set/show calibration info
dsel
Set/show displayed quantities
27
HMT130 User Guide
M211280EN-C
Command
Description
echo
Set/show terminal echo mode
env
Set/show environmental parameters
errs
Display active errors
form
Set/show output formatting
frestore
Restore all transmitter settings to factory defaults
help
List available commands
intv
Set/show the continuous output interval
open
Stop POLL mode
r
Start continuous outputting
reset
Reset transmitter
restore
Restores the latest saved settings
rmode
Set/show relay operating mode
rout
Show all relay-related parameters
rsel
Set/show relay quantity
s
Stop continuous outputting
save
Save changed settings to FLASH memor
sdelay
Set/show RS-485 turnaround time for User Port
send
Output the reading once
seri
Set/show Service Port settings (Default: 19200 N 8 1)
seri2
Set/show User Port settings (Default: 19200 N 8 1)
smode
Set/show the serial interface mode
system
Show transmitter information and build date
unit
Set/show output unit
vers
Show firmware version of the transmitter
4.6 Device Information and Status
Table 7
? Command
Syntax
Description
?<cr>
Show listing of device information.
28
Chapter 4 – Serial Line Operation
Syntax
Description
??<cr>
Show listing of device information even if device
is in poll mode and connection has not been
opened using the open command.
Example:
?
Device Name
SW Name
SW model
SW version
Serial number
Address
Unit
Ch1 Status
Ch2 Status
Probe name
Probe SW
Probe SW date
Probe SN
Table 8
:
:
:
:
:
:
:
:
:
:
:
:
:
HMT130
HMT130
HMT130
0.9.3.389
"F2220101"
0
METRIC
ON
ON
"HMP110"
"1.01.1"
""
"F0740011"
Calcs Command
Syntax
Description
calcs [q1 q2]<cr>
The calcs command shows the abbreviations of
the quantities measured by the transmitter. The
command can also be used to select the desired
quantities for measurement. Only after the
quantities have been set with the calcs
command, can these quantities be selected for
different outputs (see commands dsel, asel, and
form). The quantities in dsel, asel, rsel and form
must match with calcs.
where
q1,
q2
Any two of the allowed quantity
parameters, that is, RH, T, TD, TDF, A,
X, H, TW, PWS, PW
Examples:
>calcs RH Td
>
calcs td t
>
Single-parameter transmitters HMT130H and HMT130T have only one quantity
(T for HMT130T, and RH, TD, TDF, A, X, H, TW, PWS, PW for HMT130H.)
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HMT130 User Guide
M211280EN-C
Table 9 Cdate Command
Syntax
Description
cdate<cr>
Show calibration date.
Calibration refers to the
calibration of the transmitter's
analog outputs.
cdate [yyyymmdd]<cr>
Set a new calibration date.
yyyy-mm-dd = Year (yyyy), month (mm) and
day (dd) of calibration
Example:
>cdate
Calibrated
>
: "NOT SET"
Example (set a new calibration date to June 30, 2017):
cdate 2017-06-30
Calibrated
Table 10
: "2017-06-30"
Ctext Command
Syntax
Description
ctext<cr>
Show calibration information text.
Calibration refers to the
calibration of the transmitter's
analog outputs.
ctext [text]<cr>
Example:
ctext
Calib. info: "VAISALA HELSINKI"
>
30
Set a new calibration information text to be
shown after the automatic text "Calib.
info".
Chapter 4 – Serial Line Operation
Syntax
Description
Example (set a new information text):
ctext Calibration lab 2
Calib. info: "Calibration lab 2"
>
Table 11
Aout Command
Syntax
Description
aout<cr>
The aout command shows the following
information:
• Analog out mode is the output mode for the
channel, for example 0 ... 10 V.
• Error level is the level that the analog output
is set to in case of transmitter error.
• Status indicates the current status of the
channel. The statuses are:
• ON: Normal measurement operation.
• OFF: No quantity selected for the channel
using the asel command. See Table 29
(page 41).
• ERROR: Transmitter error, channel set to
error level.
• TEST: Analog channel being tested using
the atest command. See .
Example (no active errors):
>aout
*** ANALOG OUTPUT 1
Ch1 Analog out mode
Ch1 Error level
Ch1 Quantity
Ch1 Status
RH lo
RH hi
RH
Ch1 Voltage
*** ANALOG OUTPUT 2
Ch2 Analog out mode
Ch2 Error level
Ch2 Quantity
Ch2 Status
T lo
T hi
T
Ch2 Voltage
>
***
: 0_10V
: 10.8
: RH
: ON
: 0
: 100
: 36.64 %
: 3.66 V
***
: 0_10V
: 10.8
: T
: ON
: -60
: 100
: 23.85 'C
: 5.24 V
31
HMT130 User Guide
Table 12
M211280EN-C
System Command
Syntax
Description
system<cr>
Show probe firmware information.
Example:
system
Device Name
SW Name
SW model
SW version
Serial number
>
:
:
:
:
:
HMT130
HMT130
HMT130
1.0.0.500
A1234567
Table 13 Vers Command
Syntax
Description
vers<cr>
Show firmware version of the probe.
Example:
vers
HMT130 / 0.1.0.103
4.7 Serial Line Output and Communication
Table 14 R Command
Syntax
Description
r<cr>
S
Use the r command to start the continuous
outputting of measurement values as an ASCII
text string to the serial line. The output always
includes the readings of the currently selected
analog output quantities.
Outputting the results continues in intervals
issued with the command intv. You can stop the
output by entering the s command.
You can define the output data formatting with
the form command. With X parameter the
transmitter will output RH + T value in
predefined format regardless of what quantities
are selected.
32
Chapter 4 – Serial Line Operation
Syntax
Description
Example:
r
RH= 25.10% T= 24.77'C
RH= 25.12% T= 24.96'C
...
Table 15
S Command
Syntax
Description
s<cr>
Stop the continuous outputting that was started
with the r command.
Example:
...
RH= 25.10% T= 24.77'C
RH= 25.12% T= 24.96'C
s
Table 16 Intv Command
Syntax
Description
intv<cr>
Use the intv command to show or set the output
interval of the serial line measurement messages
(applies when r command or RUN mode is
used). The shortest output interval is one
second. This command has no effect on the
operation of the analog outputs.
intv [iii uuu]<cr>
Set the output interval.
iii = interval, range 0 ... 255.
u = unit for interval setting:
• s = seconds
• min = minutes
• h = hours
If you set the interval to 0, the output messages
are output as quickly as they are generated,
without additional delay.
Example:
intv 5 s
Output interval: 5 S
>
33
HMT130 User Guide
Table 17
M211280EN-C
Send Command
Syntax
Description
send [x] <cr>
Use the send command to output a single
measurement reading from the transmitter.
When you enter the x parameter, the transmitter
will output RH + T value in predefined format
regardless of what quantities are selected.
Example:
send
RH= 25.12 % T= 24.91 'C
>
4.8 Calibration Commands
Serial commands that are related to calibration are described in this section. For
the actual calibration procedures, see Calibration and Adjustment Overview
(page 57).
Table 18
CRH Command
Syntax
Description
crh<cr>
Use the crh command to perform a 1-point or 2point humidity (RH) calibration.
When performing a one-point calibration, you
need to place the probe in a single humidity
reference with RH < 50%. Run the command and
enter the exact RH of the reference after the
measurement has stabilized. Exit the command
by pressing the ESC key before proceeding to
the second point (see example 3).
To update the value, press ENTER without
inputting a value. For two-point calibration, the
first point requires a RH < 35% humidity
reference, the second point must be RH > 50%.
Example 1: 1-point calibration
>crh
RH:
11.29915720 Ref1 ? 11.3
Press ENTER to continue or ESC to exit
OK
>
34
Chapter 4 – Serial Line Operation
Syntax
Description
Example 2: 2-point calibration
>crh
RH:
11.29915720 Ref1 ? 11.3
Press ENTER to continue or ESC to exit
RH:
75.04306440 Ref2 ? 75
OK
>
Example 3: No calibration, only updating the value
>crh
RH:
20.28000200 Ref1 ?
RH:
20.14000000 Ref1 ?
Calibration terminated with ESC
>
Table 19 CRHCLR Command
Syntax
Description
crhclr<cr>
Use the crhclr command to restore the probe
RH factory calibration.
Example:
>crhclr
OK
>
Table 20
CT Command
Syntax
Description
ct<cr>
Use the ct command to perform a 1-point or 2point temperature calibration.
When performing a 1-point calibration, you need
to place the probe in a single temperature
reference. Run the command and enter the
exact temperature of the reference after the
measurement has stabilized. Exit the command
by pressing the ESC key before proceeding to
the second point. To update the value, press
ENTER without inputting a value.
For two-point calibration, the second reference
point must be at least 20 ºC warmer than the
first. The measurement reading for the second
point will appear when this requirement is met.
35
HMT130 User Guide
Syntax
M211280EN-C
Description
Example 1: 1-point calibration
>ct
T 21.9827 Ref1 ? 22
Press ENTER to continue or ESC to exit
OK
>
Example 2: 2-point calibration
>ct
T 22.0007 Ref1 ? 22
Press ENTER to continue or ESC to exit
T 44.9847 Ref2 ? 45
OK
>
Example 3: No calibration, only updating the value
>ct
T 22.0007 Ref1 ?
T 22.0145 Ref1 ?
Calibration terminated with ESC
>
Table 21
CTCLR Command
Syntax
Description
ctclr<cr>
Use the ctclr command to restore the probe
temperature factory calibration.
Example:
>ctclr
OK
>
36
Chapter 4 – Serial Line Operation
Table 22
ACAL Command
Syntax
Description
acal<cr>
Use the acal command to calibrate the analog
current loop outputs.
After you give this command, the CH1 analog
output of the transmitter is set to the low limit
(4mA). Measure the output and enter the
measured value. After entering the low limit, you
must measure and enter the high limit (20mA)
also. The same procedure is then repeated with
CH2. Calculated coefficients are printed after the
measured values are given.
Example:
>acal
Ch1 I1 (mA) ? 5.60
Ch1 I2 (mA) ? 18.40
-1.40562890E+03 a0
1.41171900E+03 a1
OK
Ch2 I1 (mA) ? 5.60
Ch2 I2 (mA) ? 18.40
-1.40562890E+03 a0
1.41171900E+03 a1
OK
>
The question mark is displayed after a certain stabilization time has expired.
Only enter values after the question mark is displayed. Values entered before
the question mark are discarded.
4.9 Configuring Serial Line Operation
Table 23 SERI Command
Syntax
Description
seri [b p d s]<cr>
Use the seri command to show or set the serial
line settings for the serial port that you are
currently using. Use the SAVE command after
changing the settings to store them. The new
settings will be taken into use when the
transmitter is reset or powered up.
where
b
p
d
s
baud rate (9600, 19200, 38400, 76800,
115200)
parity (n = none, e = even, o = odd)
data bits (7 or 8)
stop bits (1 or 2)
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HMT130 User Guide
M211280EN-C
Syntax
Description
Examples
>seri
Baud P D S
>
: 19200 N 8 1
>seri 9600 e 7 1
Baud rate
: 9600
Parity
: E
Data bits
: 7
Stop bits
: 1
>save
Saving settings...done
>
Table 24
ECHO Command
Syntax
Description
echo [on] [off]<cr>
To show or set the terminal echo status, use the
echo command.
Examples:
>echo
COM1 Echo
>
>echo on
COM1 Echo
Table 25
: OFF
: ON
SMODE Command
Syntax
Description
smode [stop/run]<cr>
Use the smode command to show or set the
serial interface mode. Note that a separate save
command is not needed to store the new serial
interface mode setting.
STOP
mode
RUN
mode
38
outputting only when command is
issued, any command can be used.
outputting automatically, only
command S can be used.
Chapter 4 – Serial Line Operation
Syntax
Description
Example:
>smode stop
Output mode
>
: STOP
4.10 Measurement Parameter Configuration
Commands
Table 26
ENV Command
Syntax
Description
env [x.xxxx]<cr>
Use the env command to show or set the
environmental compensation values. In HMT130,
the humidity measurement can be compensated
for ambient pressure. The value set with the env
command is a permanent value which remains in
use after a restart.
where
x.xxxx
Absolute pressure in the measuring
environment. The default is 1.013. The
pressure unit is bar.
Examples:
>env
Pressure (bar)
>
: 1.013
>env 0.980
Pressure (bar)
: 0.98
>save
Saving settings...done
>
You can use the Vaisala Humidity Calculator to simulate the effect of pressure
change to dewpoint. The Humidity Calculator can be found at:
www.vaisala.com/humiditycalculator
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HMT130 User Guide
M211280EN-C
4.11 Analog Output Configuration Commands
Table 27 AMODE Command
Syntax
Description
amode [CH1mode CH2mode]
[CH1lowlimit CH1highlimit]
[CH2lowlimit CH2highlimit]<cr>
Use the amode command to show or set the
analog output mode
where
CH1mode /
CH2mode
0_5V (Output scale 0 …
5V)
0_10V (Output scale 0 …
10V)
CH1lowlimit /
CH2lowlimit
CH1highlimit /
CH2highlimit
X_YV (Output scale
lowlimit … highlimit)
Low limit for output
voltage
High limit for output
voltage
Example: Channel 1 limits configured as 1 ... 6 volts and Channel 2 as 0 ... 5 volts
>amode x_yv 0_5V 1 6
Ch1 Analog out mode :
Ch2 Analog out mode :
Ch1 low limit
:
Ch1 high limit
:
>
X_YV
0_5V
1
6
Example: User prompted to accept currently used channel limits or enter new limits
>amode x_yv
Ch1 Analog out mode : X_YV
Ch2 Analog out mode : 0_10V ?
Ch1 low limit
: 0 ?
Ch1 high limit
: 10 ? 1
>
Table 28
AERR Command
Syntax
Description
aerr [level1 level2]<cr>
Use the aerr command to show or set the
analog output error levels.
where
level 1 level 2
40
Error levels for analog output
channel
Chapter 4 – Serial Line Operation
Syntax
Description
Examples:
>aerr
Ch1 Error level
Ch2 Error level
>
: 3.6
: 3.6
>aerr 3.85 3.86
Ch1 Error level
Ch2 Error level
>
: 3.85
: 3.86
Table 29 ASEL Command
Syntax
Description
asel [q1 q2] [lo1 hi1 lo2 hi2]<cr>
After you have defined the quantities with the
calcs command, use the asel command to show
or set the quantity output by the analog
channels, and the scaling that is used. If you do
not enter scaling limits, default values are used.
Valid quantities are: RH, T, TD, TDF, A, X, H, TW,
PWS, PW and NONE. The NONE parameter
disables analog output and output is forced to
error level.
where
q1 q2
lo1 lo2
hi1 hi2
Analog output channel quantities
Low limits of scaling
High limits of scaling
Syntax for single-parameter transmitters:
asel [q] [lo hi]<cr>
where
q
Analog output channel quantity
lo Low limit of scaling
hi High limit of scaling
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HMT130 User Guide
M211280EN-C
Syntax
Description
Examples:
>asel
Ch1 Quantity
RH lo
RH hi
Ch2 Quantity
T lo
T hi
>
:
:
:
:
:
:
RH
0
100
T
-60
100
>asel rh td
Ch1 Quantity
RH lo
RH hi
Ch2 Quantity
T lo
T hi
>
:
:
:
:
:
:
RH
0
100
TD
-40
60
>asel t td 0 60 -20 60
Ch1 Quantity
: T
T lo
: 0
T hi
: 60
Ch2 Quantity
: TD
Td lo
: -20
Td hi
: 60
>
42
>asel rh none
Ch1 Quantity
RH lo
RH hi
Ch2 Quantity
>
:
:
:
:
>asel none none
Ch1 Quantity
Ch2 Quantity
>
: NONE
: NONE
RH
0
100
NONE
Chapter 4 – Serial Line Operation
Table 30
ATEST Command
Syntax
Description
atest [val1 val2]<cr>
Use the atest command to test the analog
outputs. The atest command will force the
output to the given value, which can then be
measured with a calibrated multimeter.
where
val1 val2
Analog channel output value (V)
The atest command affects only the analog
outputs and hence it does not disable
measurement functions. atest without
parameters will exit the test mode and let the
measurement continue. It will also indicate the
current analog output levels in normal
measurement state
Examples:
>atest
CH1: 2.360000
CH2: 3.765010
>
>atest 5.0 5.0
CH1: 5.000000
CH2: 5.000000
>
4.12 Relay Output Configuration
Table 31
RSEL Command
Syntax
Description
rsel [q]<cr>
After you have defined the quantities with the
calcs command, use the rsel command to show
or set the relay quantity. Valid quantity
parameters are RH, T, TD, TDF, A, X, H, TW, PWS
and PW.
where
q Quantity to define relay state.
Example:
>RSEL T
Relay quantity
>
: T
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HMT130 User Guide
M211280EN-C
Table 32 RMODE Command
Syntax
Description
rmode [xxxx] [lo] [hi]<cr>
Use the rmode command to set/show relay
mode, low and high limits. Relay modes are OFF,
LO_OPEN and HI_OPEN. Low and high values
specify relay operation limits for the selected
quantity.
where
xxxx OFF, LO_OPEN or HI_OPEN
lo
Low limit
hi
High limit
• In OFF mode: relay contacts are always open
• In LO_OPEN mode: relay contacts are opened
when the value is below the set low limit and
closed when value is above the high limit.
• In HI_OPEN mode: relay contacts are opened
when the value is above the set high limit and
closed when value is below the low limit.
Example:
>RMODE LO_OPEN 10 20
Relay mode
: LO_OPEN
Relay low
: 10
Relay high
: 20
>
Table 33
ROUT Command
Syntax
Description
rout<cr>
Use the rout command to show the current relay
settings.
Example:
>ROUT
*** RELAY OUTPUT ***
Relay quantity
: RH
RH
: 22.35 %
Relay mode
: LO_OPEN
Relay low
: 10
Relay high
: 20
Relay status
: CLOSED
>
44
Chapter 4 – Serial Line Operation
4.13 Other Commands
Table 34
DSEL Command
Syntax
Description
dsel [q1 q2]<cr>
After you have defined the quantities with the
calcs command, use the dsel command to show
or set the displayed quantities. The number of
parameters determines the display mode (that
is, one or two rows). If one quantity is given, the
display switches to one-row mode. If two
quantities are given, the two-row mode is used.
Valid quantities are: RH, T, TD, TDF, A, X, H, TW,
PWS, and PW.
where
q1 q2
Quantities to be shown on the
transmitter display
Syntax for single-parameter transmitters:
dsel [q]<cr>
where
q
Quantity to be shown on the transmitter
display
Examples:
>dsel
1. quantity
2. quantity
>
: RH
: T
>dsel rh t
1. quantity
2. quantity
>
: RH
: T
>dsel t
1. quantity
>
: T
45
HMT130 User Guide
Table 35
M211280EN-C
FORM Command
Syntax
Description
form <format><cr>
After you have defined the quantities with the
calcs command, use the form command to set
the output format for the send and r commands.
where format is a formatting string that
consists of one of the following fields:
“”
String constant
x.y
Value length modifier. x is numbers
before dot and y is numbers after
dot.
Ux
Unit field length. U…U format is also
supported.
Q
Quantity name (for example, rh, t, or
td)
#t or \t
Tabulator
#r or \r
Carriage return
#n or \n Line feed (new line)
• Quantity must be after x.y and
Ux modifiers.
• There must be a space between
parameters, #r#n or \r\n is not
supported.
• Max. string length is 80
characters.
• If the Ux parameter is not used,
unit is not displayed.
Examples:
>form "RH= " 3.2 U2 rh #r #n
>send
RH= 32.16 %
>
>form "t=" 4.1 U3 t \t "rh=" 3.2 U2 rh \r \n
>send
t= 22.5 'C
rh= 29.12 %
>
>form "t=" 4.1 U3 t \t "rh=" rh \r \n
>send
t= 22.3 'C
rh= 29.5%
>
>form 3.2 UUU "RH=" rh \t "T=" t \r \n
>send
RH= 27.99 %
T= 23.34 'C
>
>form 3.3 rh " " t \r \n
>send
26.740 23.660
>
>form "->" "RH=" 3.2 U2 rh " " "T=" 3.1 U3 t #r #n
>send
->RH= 27.79 % T= 23.4 'C
>
46
Chapter 4 – Serial Line Operation
Table 36
HELP Command
Syntax
Description
help<cr>
Use the help command to display the list of
available commands.
Table 37
ERRS Command
Syntax
Description
errs<cr>
Use the errs command to display the currently
active error codes. For troubleshooting active
errors, see Error Codes (page 74).
Example (no active errors):
>errs
No errors.
>
Table 38 SAVE Command
Syntax
Description
save<cr>
Use the save command to save changed
settings to the transmitter FLASH memory. Most
settings have to be saved or the changes are lost
at the next reset or power down.
The smode command saves the
new serial mode immediately,
and a separate save command is
not needed.
The probe calibration
commands (crh, ct, crhclr, ctclr)
store the parameters into the
probe's memory automatically
without a separate save
command.
Example:
>save
Saving settings...done
>
47
HMT130 User Guide
Table 39
M211280EN-C
RESTORE Command
Syntax
Description
restore<cr>
Use the restore command to restore saved
settings from transmitter FLASH memory to
RAM. All unsaved changes will be lost.
>restore
Restoring default settings...done
>
Table 40
RESET Command
Syntax
Description
reset<cr>
Use the reset command to reset the transmitter.
Upon reset or power-up, the transmitter enters
the serial mode that has been set with the
smode command.
After a reset, the configuration is loaded from
FLASH memory. This configuration can be
altered by saving different settings with the
save command.
Example: Transmitter set to serial mode STOP, will output transmitter software version at reset
>reset
HMT130 / 0.1.0.001
Type "help" for command list
>
Table 41
FRESTORE Command
Syntax
Description
frestore<cr>
Use the frestore command to restore the factory
settings to the transmitter. All user settings,
including the user-performed calibration
corrections, will be lost. The transmitter will
revert back to the factory calibrated settings.
Note that this only returns the factory settings
of the transmitter and not of the
interchangeable probe (see Table 19 (page 35)
and Table 21 (page 36)).
48
Chapter 4 – Serial Line Operation
Syntax
Description
Example:
>frestore
Restoring factory defaults...done
>
Table 42
UNIT Command
Syntax
Description
unit [metric/non_metric]<cr>
Use the unit command to show or set the output
unit (metric or non-metric).
Examples:
>unit
Unit
>
: METRIC
>unit non_metric
Unit
>
: NON_METRIC
4.14 User Port (RS-485) Commands
The RS-485 interface enables communication between RS-485 network and HMT130
transmitter. The RS-485 interface is not isolated.
Set the RS-485 interface by using the commands listed in this section. Other serial line
commands are presented in List of Serial Commands (page 27).
Table 43 SERI Command
seri [b p d s]<cr>
where
b bit rate (1200, 2400, 4800, 9600, 19200,
38400, 57600, 115200)
p parity (n = none, e = even, o = odd)
d data bits (7 or 8)
s stop bits (1 or 2)
Use the seri command to input RS-485 bus
settings. This command affects the serial port
where the settings are given (service port or
user port).
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HMT130 User Guide
Table 44
SERI2 Command
seri2 [b p d s]<cr>
where
b bit rate (1200, 2400, 4800, 9600, 19200,
38400, 57600, 115200)
p parity (n = none, e = even, o = odd)
d data bits (7 or 8)
s stop bits (1 or 2)
Table 45
M211280EN-C
The seri2 command is equivalent to the seri
command, but it affects only the user port
settings. The main purpose of the command is
to change the user port settings via the service
port.
ECHO Command
Syntax
Description
echo [x]<cr>
Use the echo command to enable/disable echo
of characters received over the serial line.
where
x ON or OFF (default=OFF)
Table 46
When using a 2-wire connection,
echo must be always disabled
(OFF).
SMODE Command
smode [xxxx]<cr>
where
xxxx STOP,RUN or POLL
Use the smode command to set the default
serial interface mode.
When several transmitters are
connected to the same line, each
transmitter must be entered an
own address in the initial
configuration, and POLL mode
must be used.
• STOP: measurements are output only when
the send command is given, all commands
can be used
• RUN: measurements are output automatically,
only the s command can be used to stop the
output
• POLL: measurements are output only when
the send [addr] command is given specifying
a polled transmitter's address
Table 47
SDELAY Command
Syntax
sdelay [delay]<cr>
Description
Use the sdelay command to set the answer
delay (RS-485 turnaround time) for the User
where
delay RS-485 turnaround time in milliseconds, Port.
range 0 ... 1000 ms.
50
Chapter 4 – Serial Line Operation
Syntax
Description
Example:
>sdelay 100
Turnaround time
>
: 100
Table 48 INTV Command
Syntax
Description
intv [n xxx]<cr>
Use the intv command to set the RUN mode
output interval.
where
n
1 ... 255
xxx S, MIN or H
The time interval is used only when the RUN
mode is active. Setting the RUN output interval
to zero enables the fastest possible output rate.
Example: set output interval to 10 min:
>intv 10 min
Output intrv.
>
Table 49
:
10 min
ADDR Command
Syntax
Description
addr [aa]<cr>
Use the addr command to view or input the
RS-485 transmitter address.
where
aa address (0 ... 99) (default = 0)
Addresses are required only for
POLL mode (see Table 25
(page 38).
Example: Configure the transmitter to use address 99 (after the ?prompt)
>addr
Address : 2 ?
>
99
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HMT130 User Guide
Table 50
M211280EN-C
SEND Command
Syntax
Description
send [aa]<cr>
Use the send command to output the reading
once in POLL mode.
where
aa address of the transmitter (set with the
addr command)
Table 51
OPEN Command
Syntax
Description
open [aa]<cr>
When all transmitters on the RS-485 bus are in
POLL mode, the open command sets one
transmitter temporarily to STOP mode so that
other commands can be entered.
where
aa address of the transmitter (set with the
addr command)
Table 52
CLOSE Command
Syntax
Description
close<cr>
The close command switches the transmitter
back to the POLL mode.
Example:
>OPEN 2
// (opens the line to transmitter 2, other transmitters stay in
POLL mode)
>CRH
// (for example, calibration performed)
...
>CLOSE
// (line closed)
52
Chapter 5 – Maintenance
5. Maintenance
5.1 Removing and Fastening Fixed Humidity Probe
To remove or replace the probe:
1. Loosen the metal locking bushing by carefully turning it counterclockwise.
2. Remove the probe from the transmitter by pulling it gently downwards.
3. Attach the new probe to the 4-pin M8 panel connector at the transmitter (only one
position possible).
4. Tighten the locking bushing to the M8 panel connector by turning it clockwise
Figure 13 Removing the Humidity Probe
(Fixed Probe Model)
1
2
3
Locking bushing
Holder bushing (attached permanently
to the probe)
HMP110 probe
2
3
1
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5.2 Removing and Fastening Remote Humidity
Probe
To remove or replace the probe:
1. Unscrew the small sleeve that secures the probe in place at the end of the probe cable
and pull out the probe.
2. Replace the probe and screw the small sleeve back on, securing the probe tightly in place.
1
Figure 14
1
2
3
54
2
Removing the Humidity Probe (Remote Probe Model)
Probe cable
Sleeve securing the probe to the cable
HMP110 probe
3
Chapter 5 – Maintenance
5.3 Testing Analog Outputs
The transmitter has a built-in software function for testing analog outputs. To test the outputs:
1. Make sure the transmitter is not in adjustment mode (see Calibration and Adjustment
Overview (page 57)).
2. Press the + adjustment button (see Figure 11 (page 21)). This sets the output voltage level
to the high point of the analog output range (for example 10 V). The output stays at this
level for about 30 seconds after the + adjustment button has been pressed.
V
VIN-
VIN+
SHIELD
CH2
SGND
CH1
3. Press the - adjustment button. This sets the output voltage level to the low point of the
analog output range (for example 0 V). The output stays at this level for about 30
seconds after the - adjustment button has been pressed.
-
+
10 ... 35 VDC
24 VAC
V
Figure 15
HMT130 Output Voltage Measurement
If your transmitter has the optional display, the following texts are shown on the
display the during analog output test:
• Analog output test high: analog output set to upper limit
• Analog output test low: analog output set to low limit
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5.4 Replacing the HUMICAP Sensor
To replace the HUMICAPâ sensor on a fixed or remote probe:
1. Remove the filter (plastic grid or sintered stainless steel).
2. Remove the damaged sensor and insert a new one.
3. Recalibrate the probe.
4. If the filter is dirty, replace it to ensure maximum lifetime and fast sensor response. Do not
attempt to clean the filter.
More Information
‣ Calibration and Adjustment Overview (page 57)
56
Chapter 6 – Calibration and Adjustment
6. Calibration and Adjustment
6.1 Calibration and Adjustment Overview
You can calibrate and adjust the transmitter using the following tools:
• Push buttons on the transmitter motherboard
• Serial line commands
• Portable humidity meters HM70 and HMI41
A calibrator kit is needed for calibration against saturated salt solutions. The HMK15 Humidity
Calibrator and pre-measured certified salts are available from Vaisala. For further information,
please contact your Vaisala representative.
Vaisala Service Centers also offer accredited calibrations for humidity and temperature.
You can also remove the HMP110 probe and replace it with a new one. The old probe can be
adjusted using another transmitter body, if you have one available.
RH Field Calibration and Adjustment, as instructed in this document, is restricted
to a certain adjustment range to minimize the effects of special circumstances,
such as chemical contamination. In case the probe is outside its adjustment/trim
range due to, for example, chemical exposure, the calibration cannot be
completed. In this case, it is recommended that you change the probe or contact
Vaisala Services.
More Information
‣
‣
‣
‣
Push-Button Calibration (page 58)
Calibration Commands (page 34)
Adjusting RH and T with MI70 Hand-Held Indicator (page 61)
Adjustment with HMI41 (page 65)
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M211280EN-C
6.2 Push-Button Calibration
C
A
L
RH
T
ADJ
C
A
L
RH
T
ADJ
CH2
SGND
+
CH1
+
12
ON
485 TERM
VIN+
VIN-
485+
GND
SHEILD
485SERVICE PORT
REL
Figure 16 Adjustment Buttons
You can calibrate and adjust the transmitter with the adjustment buttons on the transmitter
motherboard. The two-point humidity adjustment is carried out by using two relative humidity
references: for example saturated salt points 11 % RH (LiCl) and 75 % RH (NaCl). The difference
between the two humidity reference points must be at least 30 %RH. The difference between
the two temperature reference points must be at least 30 °C.
In push-button calibration, the transmitter outputs are by default relative
humidity in the range 0…100% RH in CH1 and temperature in the range -40…
+80°C in CH2 regardless what the actual transmitter settings are. Outputs mean
in this case both the display and analog current outputs.
6.2.1 Adjusting Humidity and Temperature with Push Buttons
The instructions here apply to both 1-point and 2-point calibration.
To make a humidity or temperature adjustment:
1. Open the transmitter cover. There are 3 buttons marked ADJ, + and - on the motherboard.
There are also two indicator LEDs, one green and one red.
2. Press the ADJ button and hold it down until the green indicator LED begins to blink slowly
(800ms cycle time).
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Chapter 6 – Calibration and Adjustment
3. The transmitter is now in RH calibration state. Analog output and optional display will still
follow the actual measured RH value.
If you do not wish to perform the RH adjustment at this time, press the ADJ
button one more time. The green indicator LED turns off and the red
indicator LED begins to blink slowly (800ms cycle time) to indicate T
calibration state. To calibrate T, follow the instructions starting from step 7.
4. Remove the filter and insert the probe into a measurement hole of the dry end reference
chamber (for example, LiCl: 11 % RH) to do the low humidity offset adjustment.
Do not touch the adjustment buttons before the conditions have stabilized.
This takes approximately 30 minutes.
5. Press either the - or + button at least once, make sure that the Iout current is correct,
adjust using the - and + buttons if needed, and press the ADJ button again. The green
indicator LED begins to blink faster (400ms cycle time).
If you do not wish to perform the two-point RH adjustment at this time, press
the ADJ button one more time. The green indicator LED turns off and the red
indicator LED begins to blink slowly (800ms cycle time) to indicate T
calibration state. To calibrate T, follow the instructions starting from step 7.
If one-point calibration is done at more than 50% RH, a gain adjustment is
done instead of an offset adjustment.
6. Insert the probe into the high end reference chamber (for example, NaCl: 75 % RH
chamber in the humidity calibrator HMK15) and do the high humidity gain adjustment by
using the - and + buttons to make sure the Iout current is correct (you have to press either
- or + at least once even if the value is correct). To finish the RH calibration, press the ADJ
button. The green LED is now turned off and the red indicator LED begins to blink slowly
(800ms cycle time).
7. The transmitter is now in T calibration state. Analog output and optional display will still
follow the actual measured T value.
If you do not wish to perform the T adjustment at this time, press ADJ button
one more time. The red indicator LED is turned off and the transmitter
returns to normal mode. The calibration procedure is now finished.
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HMT130 User Guide
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8. Insert the probe into a known reference temperature (if Vaisala Humidity Calibrator
HMK15 is not used) and let the temperature reading stabilize.
Do not touch the adjustment buttons before the conditions have stabilized.
9. Using the - and + buttons, make the temperature offset adjustment by making sure the
Iout current is correct (you have to press either - or + at least once even if the value is
correct) and press the ADJ button. The red indicator LED begins to blink faster (400ms
cycle time).
If you do not wish to perform the two-point T adjustment at this time, press
the ADJ button one more time. The red indicator LED is turned off and the
transmitter returns to normal mode. The calibration procedure is now
finished.
10. Insert the probe into another reference temperature.
Do not touch the adjustment buttons before the conditions have stabilized.
11. Using the - and + buttons, make the temperature gain adjustment by making sure the Iout
current is correct (you have to press either - or + at least once even if the value is correct).
12. Press the ADJ button one more time. The red indicator LED turns off and the transmitter
returns to normal mode. The calibration procedure is now finished.
In case of calibration error, both LEDs blink alternately at a very fast rate (cycle
time 200ms) for a period of 2s after which the transmitter returns to normal
mode.
If your transmitter has the optional display, the following notifications are shown
on the display during calibration:
•
•
•
•
•
60
Probe cal: RH 1 (corresponding the green LED blinking slowly)
Probe cal: RH 2 (corresponding the green LED blinking fast)
Probe cal: T1 (corresponding the red LED blinking slowly)
Probe cal: T2 (corresponding the red LED blinking fast)
Probe cal: Error (corresponding both LEDs blinking alternately at very fast
rate)
Chapter 6 – Calibration and Adjustment
6.3 Adjusting RH and T with MI70 Hand-Held
Indicator
• MI70 hand-held indicator (included in, for example, the HM70 package)
• MI70 connection cable (Vaisala order code: 211339)
You can check and adjust the transmitter's relative humidity and temperature measurement
with the MI70 (HM70) Hand-Held Humidity and Temperature meter.
There are four types of adjustments available:
• Field checking and adjustment using a calibrated reference probe
• 1-point adjustment using a calibrator,
• 2-point adjustment using a calibrator,
• LiCl-NaCl adjustment
Start the adjustment by completing the first 7 steps and then continue according to the
chosen adjustment method.
1. Connect the HM70 connection cable (211339) to the SERVICE PORT connector on the
transmitter's motherboard (see Figure 11 (page 21)).
2. Connect the other end of the connection cable to either of the MI70 connector ports (port
I or port II) located on the bottom of the indicator.
I
II
3. Turn on both devices (or just the MI70 indicator if the transmitter is on continuously).
4. The reading of the transmitter is shown on the top or middle row of the indicator display,
depending on which connector port the connection cable is connected to.
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5. Press the ADJ button on the transmitter's motherboard to open the adjustment mode.
Both LEDs on the motherboard remain in OFF state and the text "Starting adjustment
mode for HMP110" is shown on the MI70 display.
In transmitters with the optional display, the text MI70 adjustment mode is
shown on the upper row of the display.
From this point onward, the transmitter's local adjustment buttons are
disabled and adjustment is carried out using the MI70 indicator. The
transmitter display and analog outputs will always follow the actual
measured RH/T value when in MI70 adjustment mode. When operating the
MI70, do not press the buttons too quickly or the calibration may fail. Wait for
one second between each press.
6. Press OK to start the adjustment.
7. Check the environment settings if needed. Otherwise, press NO. Select RH adjustment or
T adjustment.
8. Continue according to the instructions for one of the following adjustment methods:
• Field Checking and Adjustment Using a Calibrated Reference Probe (page 62)
• 1-Point Adjustment Using a Calibrator (page 63)
• 2-Point Adjustment Using a Calibrator (page 63)
• LiCl-NaCl Adjustment (page 64)
• Temperature Field Check and Adjustment Using a Calibrated Reference Probe
(page 65)
6.3.1 Field Checking and Adjustment Using a Calibrated
Reference Probe
Complete the steps listed in Adjusting RH and T with MI70 Hand-Held Indicator
(page 61) before continuing with this adjustment option.
1. Check that the probes are located in equal conditions and wait until the readings have
stabilized (can take 30 minutes or more). If you are close to the probes, do not breathe in
their direction.
2. Press ADJUST to continue adjusting.
3. Choose To same as RHI/II from the MI70 adjustment menu and press SELECT. MI70
automatically recognizes which port the HMP70 series probe is connected to.
4. Press YES to confirm the adjustment.
5. Turn off the MI70 and detach the connection cable.
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Chapter 6 – Calibration and Adjustment
6.3.2 1-Point Adjustment Using a Calibrator
Complete the steps listed in Adjusting RH and T with MI70 Hand-Held Indicator
(page 61) before continuing with this adjustment option.
1. Remove the filter from the transmitter's probe and insert the probe head into the
reference condition.
2. Press ADJUST to continue adjusting.
3. Choose 1-point adjustment from the MI70 adjustment menu and press SELECT.
4. Press READY when the reading has stabilized in the reference condition (can take 30
minutes or more). You can follow the stabilization from the GRAPH display.
5. Enter the correct reference value with the arrow buttons and press OK.
6. Confirm the adjustment by pressing YES.
7. The adjustment is done. Press BACK and EXIT to return to the basic display.
8. Turn off the MI70 and detach the connection cable.
6.3.3 2-Point Adjustment Using a Calibrator
Complete the steps listed in Adjusting RH and T with MI70 Hand-Held Indicator
(page 61) before continuing with this adjustment option.
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When making a 2-point adjustment, the difference between the two reference
conditions must be at least 50 %RH. If the difference is < 50 %RH, the adjustment
cannot be made.
1. Remove the filter from the transmitter's probe and insert the probe head into the lower
reference condition.
2. Press ADJUST to continue adjusting.
3. Choose 2-point adjustment from the MI70 adjustment menu and press SELECT.
4. Press READY when the reading has stabilized in the first reference condition (can take 30
minutes or more). You can follow the stabilization from the GRAPH display.
5. Enter the correct reference value of the first condition with the arrow buttons and press
OK.
6. Remove the probe from the first reference condition and insert the probe head into the
higher humidity reference condition.
7. Press READY when the reading has stabilized in the second reference condition (can take
30 minutes or more). You can follow the stabilization from the GRAPH display.
8. Enter the correct reference value of the second condition with the arrow buttons and
press OK.
9. Confirm the adjustment by pressing YES (by pressing NO you return to adjustment mode
display and no changes are made). If the difference between the two reference conditions
is less than 50 %RH, adjustment cannot be done.
10. The adjustment is done. Press BACK and EXIT to return to the basic display.
11. Turn off the MI70 and detach the connection cable.
6.3.4 LiCl-NaCl Adjustment
Complete the steps listed in Adjusting RH and T with MI70 Hand-Held Indicator
(page 61) before continuing with this adjustment option.
This adjustment is made using relative humidity references 11.3 % RH (LiCl) and
75.5 % RH (NaCl).
1. Remove the filter from the transmitter's probe and insert the probe head into the LiCl salt
chamber.
2. Press ADJUST to continue adjusting.
3. Choose LiCl-NaCl autom. from the MI70 adjustment menu and press SELECT. Press OK to
accept the note telling about references.
64
Chapter 6 – Calibration and Adjustment
4. Press READY when the reading has stabilized in the LiCl salt chamber (can take 30
minutes or more). You can follow the stabilization from the GRAPH display.
5. Remove the probe from the LiCl salt chamber and insert the probe head into the NaCl salt
chamber.
6. Press READY when the reading has stabilized in the NaCl salt chamber (can take 30
minutes or more). You can follow the stabilization from the GRAPH display.
7. Confirm the adjustment by pressing YES (by pressing NO you return to adjustment mode
display and no changes are made).
8. The adjustment is done. Press BACK and EXIT to return to the basic display.
9. Turn off the MI70 and detach the connection cable.
6.3.5 Temperature Field Check and Adjustment Using a
Calibrated Reference Probe
Complete the steps listed in Adjusting RH and T with MI70 Hand-Held Indicator
(page 61) before continuing with this adjustment option.
1. Check that the probes are located in equal conditions and wait until the readings have
stabilized (can take 30 minutes or more). If you are close to the probes, do not breathe in
their direction.
2. Press ADJUST to continue adjusting.
3. Choose To same as THI/II from the MI70 adjustment menu and press SELECT. MI70
automatically recognizes which port the HMP70 series probe is connected to.
4. Press YES to confirm the adjustment.
If the temperature difference between the reference probe and the
transmitter is too large, the adjustment cannot be done (MI70 notifies you of
this). The available reserve for T adjustment of the transmitter depends on
the initial temperature calibration of the unit.
5. The adjustment is done. Press BACK and EXIT to return to the basic display.
6. Turn off the MI70 and detach the connection cable.
6.4 Adjustment with HMI41
You can check and adjust the transmitter's relative humidity measurement with the HMI41
indicator and HMP41/45/46 probes (requires the HMI41 connection cable (Vaisala order code:
25917ZZ)).
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HMT130 User Guide
M211280EN-C
Figure 17 Location of the HMI41 Calibration
Connector
1
1
2
3
2
HMI41 indicator
25917ZZ connection cable
EXT connector
3
There are three adjustment modes available: offset (dry point), gain (wet point), and 2-point
adjustment. All of these can be performed using the HMI41 either as a reference meter (for
example when the transmitter is mounted in an air-conditioning channel), or only as a terminal
for visualizing and setting the transmitter's RH reading.
Offset and gain adjustments are performed the same way and differ only in internal
calculations. Select offset adjustment when the reference humidity is < 65 %RH and gain
adjustment when the reference humidity is ≥ 65 %RH. Two-point adjustment is more accurate,
and includes both offset and gain corrections. For performing two-point adjustment, you need
two separate measurement points with a difference of at least 50 %RH between them.
Start by completing the initial steps for connecting the HMI41 to the transmitter and selecting
the HMI41 calibrator function, and then continue according to the chosen adjustment method.
66
Chapter 6 – Calibration and Adjustment
6.4.1 Connections and Selecting the Calibrator Function
1. To select the calibrator function from the HMI41, press the ON/OFF button until you can
see some text on the display. Then release the ON/OFF button and within 1 ... 2 seconds,
press both ENTER and MODE buttons until the following display appears:
After a few seconds, the display changes to show the following:
If the basic settings (display units, automatic power off function, display
quantities, and pressure) have to be changed, see the HMI41 documentation
set.
2. Press ENTER repeatedly until the following display appears:
3. To calibrate the transmitter, select number 3 with buttons
(number down) and then press ENTER.
(number up) and
4. Next the baud rate appears on the display. Select the baud rate 19200 (= 19.2 on the
HMI41 display) and press ENTER. Configure the rate with the
and
buttons if
necessary.
5. The serial communications selection appears. Select the following settings: N, 8, 1 and
and
buttons if necessary.
press ENTER. Configure the settings with the
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6. Press ON/OFF to finish. These setting are stored in the HMI41 memory; when the HMI41 is
switched on again, it automatically starts up as a calibrator for digital transmitters with
these serial line settings.
After making these settings, continue with the adjustment and follow the
directions of the chosen adjustment method.
6.4.2 Adjusting Offset and Gain with HMI41
Complete the HMI41 calibration setup steps listed in Connections and Selecting
the Calibrator Function (page 67) before starting the adjustment.
Offset and gain adjustments are performed in the same way (they differ only in
internal calculations), so this section is valid for both methods.
1. Connect the 25917ZZ HMI41 connection cable to the SERVICE PORT connector on the
transmitter's motherboard (see Figure 11 (page 21)).
2. Connect the other end of the connection cable to the EXT connector located on the
bottom of the HMI41 indicator.
3. Turn on both devices. Wait until the following display appears:
4. Select the appropriate adjustment mode with the
and
buttons. Select offset
adjustment if the humidity is < 65 %RH and gain adjustment if the humidity is ≥ 65 %RH:
68
Chapter 6 – Calibration and Adjustment
5. Press ENTER to confirm the selection. A display similar to the following appears:
If you are using a transmitter with the optional display, the message HMI41
adjustment mode is shown on the upper row of the display.
6. Complete the adjustment using one of the following options:
• Adjustment Using HMI41 as Reference Meter (page 69)
• Adjustment Using HMI41 as Terminal (page 71)
6.4.2.1 Adjustment Using HMI41 as Reference Meter
Complete the steps (connect the cable and select adjustment mode) listed in
Adjusting Offset and Gain with HMI41 (page 68) before continuing with this
adjustment method.
When you carry out an adjustment using HMI41 as a reference meter, the HMI41 humidity
probe is used to show the correct humidity value (be sure that the reference probe has
previously been adjusted).
To complete the adjustment:
1. Check the display. A display similar to the one shown below should be visible. The
numbers on the first line indicate the transmitter reading, and the numbers on the second
line indicate the reference probe reading.
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2. Allow the readings to stabilize (can take 30 minutes or more). If you prefer, you can
change the display to show the difference in the readings. Press HOLD and a display
similar to the following appears:
The numbers on the first line indicate how much the transmitter reading differs from that
of the HMI41 reference probe. The numbers on the second line indicate the reference
probe reading. You can return to the previous display by pressing HOLD again.
3. When the readings have stabilized, press ENTER to complete the adjustment. When you
press ENTER, the transmitter reading is corrected to the reference probe reading. If the
adjustment has been succesful, the following display appears:
4. The data is now stored in the transmitter memory. If the adjustment has not been
successful, the following display appears:
In case of an error, perform the adjustment again. Whether the adjustment was succesful
or not, HMI41 always returns to display the selected adjustment mode.
5. When the calibration is successfully done, power off HMI41 and disconnect the cable.
70
Chapter 6 – Calibration and Adjustment
6.4.2.2 Adjustment Using HMI41 as Terminal
Complete the steps (connect the cable and select adjustment mode) listed in
Adjusting Offset and Gain with HMI41 (page 68) before continuing with this
adjustment method.
When you carry out an adjustment using HMI41 as a terminal, the HMI41 humidity probe is used
for visualizing and setting the transmitter's RH reading manually.
To complete the adjustment:
1. Check the display. A display similar to the one shown below should be visible. The
numbers on the first line indicate the transmitter reading, and the numbers on the second
line indicate the reference probe reading.
2. Allow the readings to stabilize (can take 30 minutes or more) and press MODE. The
following display appears:
The HMI41 now works only as a terminal for setting the humidity reading. The numbers on
the first line are blinking, and the numbers on the second line indicate the transmitter
reading.
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3. You can now set the blinking reading to the correct value (for example, the equilibrium RH
of a salt solution) with the
and
buttons. Press ENTER to complete the adjustment.
If the adjustment has been successful, the following display appears:
4. The data is now stored in the transmitter memory. If the adjustment has not been
succesful, the following display appears:
In case of an error, perform the adjustment again. Whether the adjustment was successful
or not, HMI41 always returns to display the selected adjustment mode.
5. When the calibration is successfully done, power off HMI41 and disconnect the cable.
6.4.3 Troubleshooting HMI41 Adjustment
Table 6 presents a summary of the error messages that can appear during adjustment with the
HMI41.
Table 53
Common Problems During HMI41 Adjustment and Their Remedies
Error Message
72
Probable Cause
Remedy
This message can appear, for
example, if the difference
between the reference
humidities is too small (<
50 %RH).
Carry out the adjustment again.
Chapter 6 – Calibration and Adjustment
Error Message
Probable Cause
Remedy
This message can appear
during adjustment when the
HMI41 is trying to contact the
transmitter.
Wait.
The connection cable is not
properly connected or the
serial line settings of the HMI41
and the transmitter do not
correspond.
Check the connection of the
calibration cable. Check that
the serial line settings in the
HMI41 memory correspond to
those of the transmitter.
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7. Troubleshooting
7.1 Error Codes
The transmitter's software provides a variety of self diagnostics information, for example,
FLASH and program memory checksum, probe communication status, probe checksum,
operation voltage check, and oscillator fault check.
At startup, the transmitter's software checks the factory/user settings checksum, program
memory checksum, and oscillator fault status. Other checks are made during runtime. The
possible error codes are listed in Table 54 (page 74).
Table 54
Error Codes, Descriptions and Texts
Code
Description
Error Text
1
Probe T measurement error
Probe T meas
2
Probe RH measurement error
Probe RA meas
3
Probe communication error
Probe communication
4
Probe checksum error
Probe checksum
5
Probe message form error
Probe message form
6
Program's flash checksum error Program code checksum
7
Current settings checksum
error (RAM)
Settings checksum
8
Factory FLASH not initialised
Factory defaults empty
9
User FLASH not initialised
User defaults empty
10
Voltage is too low to operate
correctly
Voltage too low
11
Measurements not available
Measurements not available
12
Oscillator fault bit active
HW fault 1
13
Analog output quantity invalid
Analog output quantity invalid
14
Display quantity invalid
Display quantity invalid
15
Invalid relay setting
Relay quantity invalid
You can view the error text with the errs serial line command. If you are using a transmitter
with the optional display, the error code is shown on the display in the following format:
ERR:Code-1[.Code-2][.Code-n]. Multiple errors are separated by a period (".") between the
error codes.
74
Chapter 7 – Troubleshooting
7.2 Solving Typical Problems
You can check error messages with the errs serial line command. For a list of the possible error
messages, see Error Codes (page 74). In case of constant error, contact Vaisala Technical
Support.
Table 55
Problems and Solutions
Problem or Message
Likely Causes and Solutions
Measurement not working, any of the following
errors is active:
• Sensor(s) damaged or missing. Open the
probe filter and check.
• Calibration is not done. Calibrate the probe.
• Check the supply voltage of the transmitter.
• Probe RH measurement error
• Probe T measurement error
Transmitter cannot communicate with the
probe, any of the following errors is active:
•
•
•
•
Probe communication error
Probe checksum error
Probe message form error
Measurements not available
• Check the attachment of the probe to the
transmitter.
• In case of remote probe, check also the
interconnection cables.
• Replace the probe if necessary.
Serial line command not working, outputs
Unknown command.
Mistyped or unknown command, check the
command syntax and parameters.
Cannot connect to serial line, current serial
settings of the module are unknown.
Perform the following steps to connect:
Any of the following errors is active:
Internal error. Perform the following steps:
• Current settings checksum error
• Default settings checksum error
1. Reset or power cycle the module. Check if
the error disappears.
2. Return the module to factory settings with
the frestore serial line command. Check
again.
3. If the error is still active, contact a Vaisala
service center.
1. Set your terminal settings to 19200 8 N 1
(the default settings of the transmitter).
2. Connect to the service port of the
transmitter.
3. Power up the transmitter, and type "Z" on
the serial line at least five times.
4. The transmitter will come online with the
default settings.
5. Use the seri serial line command to set the
desired serial settings and save the settings
with the save command.
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Problem or Message
Likely Causes and Solutions
Any of the following errors is active:
Faulty transmitter, contact a Vaisala service
center.
•
•
•
•
Program checksum error
Factory flash defaults checksum error
Factory flash not initialized
Oscillator fault bit active
Any of the following errors is active:
• Analog output quantity invalid
• Display quantity invalid
• In case of Analog output quantity invalid
error, select the correct output quantities (set
with the calcs command) with the asel
command.
• In case of Display quantity invalid error,
select the correct display quantities with the
dsel command.
7.3 Analog Output Error Notification
If the transmitter is unable to operate due to an error, the analog outputs are set to an error
level.
The default output voltage in error state is 0 V. The error voltage value can be changed using
the serial interface (aerr serial line command): see Analog Output Configuration Commands
(page 40).
76
Chapter 8 – Technical Data
8. Technical Data
8.1 Specifications
Table 56
Measurement Performance
Property
Description/Value
Relative Humidity
Measurement range
0 … 100 %RH
Accuracy (including non-linearity, hysteresis, and repeatability) at 0 … +40 °C (+32 … +104 °F):
0 … 90 %RH
±1.5 %RH
90 … 100 %RH
±2.5 %RH
Accuracy (including non-linearity, hysteresis, and repeatability) at -40 … 0 °C, +40 … +80 °C
(-40 … 32 °F, 104 … 176 °F):
0 … 90 %RH
±3.0 %RH
90 … 100 %RH
±4.0 %RH
Factory calibration uncertainty at +20 °C (+68 °F):
0 … 90 %RH
±1.1 %RH
90 … 100 %RH
±1.8 %RH
Humidity sensor
Vaisala HUMICAPâ 180R
Stability
±2 %RH over 2 years
Stability in typical HVAC applications
±0.5 %RH per year
Temperature
Measurement range
-40 … +80 °C (-40 … 176 °F)
Temperature sensor
Pt1000 RTD Class F0.1 IEC 60751
Accuracy over temperature range:
At +15 … +25 °C (59 … 77 °F)
±0.2 °C (±0.36 °F)
At 0 … +15 °C and at +25 … +40 °C
±0.25 °C (±0.45 °F)
(at 32 … 59 °F and at 77 … 104 °F)
At -40 … +0 °C and at +40 … +80 °C
±0.4 °C (±0.72 °F)
(at -40 … 32 °F and at 104 … 176 °F)
Other Variables (Optional)
Dew point/frost point, wet bulb temperature, enthalpy, absolute humidity, mixing ratio, vapor
pressure, and saturation vapor pressure
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Table 57
M211280EN-C
Operating Environment
Property
Description/Value
Operating temperature of transmitter body, no
display
-40 … +60 °C (-40 … 140 °F)
Operating temperature of transmitter body with
display
-20 … +60 °C (-4 … 140 °F)
Operating temperature, HMP110 probe
-40 … +80 °C (-40 … 176 °F)
Storage temperature
-50 … +70 °C (-58 … 158 °F)
EMC compliance
EN 61326-1 and EN 55022
Table 58
Inputs and Outputs
Property
Description/Value
Voltage output signals
0 … 1 V, 0 … 5 V, 0 … 10 V or user defined
between 0 … 10 V
Min output resistance
1 kΩ
Serial output
RS-485, non-isolated
Relay output
1 relay (max. 50 VDC, 200 mA)
Supply voltage
10 … 35 VDC
15 … 35 VDC (when output 0 … 10 V)
24 VAC (±20 %)
Current consumption at 24 VDC
8 mA, if relay closed 15 mA
Max. additional error caused by the analog
outputs after calibration at +20 °C (68 °F)
ambient temperature
±0.1 % of FS output signal
Temperature dependence of the analog outputs
±0.005 % of FS output signal
Table 59
Mechanical Specifications
Property
Description/Value
IP rating
IP65
Weight
270 g
Probe cable lengths
3 m, 5 m, 10 m - up to 50 m
Display (optional)
128 x 64 resolution full graphics
B&W display without backlight
Material
78
Chapter 8 – Technical Data
Property
Description/Value
Transmitter housing
PBT plastic
Display window
PC plastic
Probe body
Stainless steel (AISI 316)
Probe grid filter
Chrome coated ABS plastic
Connections
Inputs and outputs
Screw terminals 0.5 … 1.5 mm2
Probe interface
4-pin M8 female panel connector
8.2 Spare Parts and Accessories
Table 60
Spare Parts and Accessories
Description
Order Code
HMP110 probe for HMT130
HMP110 – separate order form
HMP110R replacement probe for HMT130
HMP110R – separate order form
HMP110T temperature only probe for HMT130
HMP110T – separate order form
Constant output probe
HMP110REF – separate order form
Humidity sensor
Humicap180R
Bushing for converting remote probe to fixed
probe, 10 pcs
DRW232413SP
Probe mounting flange
226061
Probe mounting clamp, 1 piece
225501
Probe mounting clamp set, 10 pcs
226067
Plastic grid filter
DRW010522SP
Plastic grid with membrane filter
DRW010525
Stainless steel sintered filter
HM46670SP
Radiation shield
DTR504A
Probe installation kit for DTR504
227777
Rain shield with installation kit
215109
Duct installation kit
215619
HMI41 connection cable
25917ZZ
HM70 connection cable
211339
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Description
Order Code
Service cable for PC, USB
219685
8.3 Transmitter Dimensions
Figure 18
80
Fixed Probe Model Dimensions in mm(in)
Chapter 8 – Technical Data
Figure 19
Remote Probe Model Dimensions in mm(in)
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Appendix A. Calculation Formulas
A.1 Calculation Formulas Overview
The transmitter receives the relative humidity and temperature values from the HMP110 probe.
Based on these temperature and relative humidity values, the transmitter calculates dewpoint,
frostpoint, absolute humidity, mixing ratio, enthalpy, wet bulb temperature, saturation vapor
pressure and vapor pressure in normal pressure.
Symbols:
Td
Pw
Pws
RH
x
p
a
T
h
Tw
Tdf
Dewpoint temperature (°C)
Water vapor pressure (hPa)
Saturation vapor pressure (hPa)
Relative humidity (%)
Mixing ratio (g/kg)
Atmospheric pressure (hPa)
Absolute humidity (g/m3)
Temperature (°C)
Enthalpy (kJ/kg)
Wet bulb temperature (°C)
Dew/frostpoint temperature (°C)
A.2 Dewpoint Temperature
The dewpoint temperature (Td) of a moist air sample is the temperature to which the sample
must be cooled to reach saturation with respect to liquid water.
Dewpoint temperature (Td) is calculated with the following formula:
�� =
��
�
−1
��
log
�
°�
Pw is the water vapor pressure (see the separate calculation formula for Pw). The parameters
A, m, and Tn depend on the temperature as shown in Table 61 (page 82).
Table 61
Temperature Dependence for A, m, and Tn
T
A
m
Tn
... 0 °C
6.119866
7.926104
250.4138
0 ... 50 °C
6.1078
7.5000
237.30
82
Appendix A – Calculation Formulas
T
A
m
Tn
50 ... 100 °C
5.9987
7.3313
229.10
100 ... 150 °C
5.8493
7.2756
225.00
150 ... °C
6.2301
7.3033
230.00
A.3 Dew/frostpoint Temperature Calculation
Dew/frostpoint temperature (Tdf) is calculated with the following formula:
�� ≥ 0
��� = ��
�� < 0
��
�
��� =
−1
��
log
�
°�
Pw is the water vapor pressure (see the separate calculation formula for Pw). The parameters
A, m, and Tn depend on the temperature as shown in Table 62 (page 83).
Table 62
Temperature Dependence for A, m, and Tn
T
A
m
Tn
... 0 °C
6.1134
9.7911
273.47
A.4 Mixing Ratio Calculation
The mixing ratio (x, mass of water vapour/mass of dry gas) is calculated with the following
formula:
�=�×
��
� − ��
�/��
where
B 621.9907 g/kg
The value of B depends on the gas. 621.9907 g/kg is valid for air.
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A.5 Saturation Vapor Pressure Calculation
Saturation vapor pressure (Pws) is the equilibrium water vapor pressure in a closed chamber
containing liquid water. It is a function only of temperature, and it indicates the maximum
amount of water that can exist in the vapor state.
Water vapor saturation pressure (Pws) is calculated with the following 2 formulas:
3
∑
����
ln ��� = � −
∑
�=�−
�=0
ℎ��
where
T
Temperature in K
Ci
Coefficients
C0 0.49313580
C1 -0.46094296 * 10-2
C2 0.13746454 * 10-4
C3 -0.12743214 * 10-7
3
�= −1
���� + �4ln �
where
bi
Coefficients
b-1 -0.58002206 * 104
b0 0.13914993 * 101
b1 -0.48640239 * 10-1
b2 0.41764768 * 10-4
b3 -0.14452093 * 10-7
b4 6.5459673
A.6 Water Vapor Pressure Calculation
Vapor pressure refers to the vapor pressure of water in air or other gas. Water vapor has a
partial pressure Pw which is part of the total pressure of the gas.
Water vapor pressure (Pw) is calculated with the following formula:
�� = �� ⋅
84
���
100
ℎ��
Appendix A – Calculation Formulas
A.7 Absolute Humidity Calculation
Absolute humidity (a) is defined as the mass of water vapour in a certain volume. If ideal gas
behaviour is assumed, the absolute humidity can be calculated using the following formula:
�=�⋅
��
� + 273.15
�/�3
where
C 216.679 gK/J
A.8 Enthalpy Calculation
Enthalpy (h) can be calculated from the mixing ratio (x) using the following formula:
ℎ = � ⋅ 1.01 + 0.00189 ⋅ � + 2.5 ⋅ �
��/��
A.9 Accuracies of Calculated Variables
Accuracies of the calculated variables depend on the calibration accuracy of the humidity and
temperature sensors; here the accuracies are given for ± 2 %RH and ± 0.2 °C.
A.9.1 Accuracy of Dewpoint Temperature °C
Table 63 Accuracy of Dewpoint Temperature °C
Relative Humidity (%RH)
Temp
10
20
30
40
50
60
70
80
90
100
-40 °C
1.86
1.03
0.76
0.63
0.55
0.50
0.46
0.43
—
—
-20 °C
2.18
1.19
0.88
0.72
0.62
0.56
0.51
0.48
—
—
0 °C
2.51
1.37
1.00
0.81
0.70
0.63
0.57
0.53
0.50
0.48
20 °C
2.87
1.56
1.13
0.92
0.79
0.70
0.64
0.59
0.55
0.53
40 °C
3.24
1.76
1.27
1.03
0.88
0.78
0.71
0.65
0.61
0.58
60 °C
3.60
1.96
1.42
1.14
0.97
0.86
0.78
0.72
0.67
0.64
80 °C
4.01
2.18
1.58
1.27
1.08
0.95
0.86
0.79
0.74
0.70
100 °C
4.42
2.41
1.74
1.40
1.19
1.05
0.95
0.87
0.81
0.76
120 °C
4.86
2.66
1.92
1.54
1.31
1.16
1.04
0.96
0.89
0.84
140 °C
5.31
2.91
2.10
1.69
1.44
1.26
1.14
1.05
0.97
0.91
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Relative Humidity (%RH)
Temp
10
20
30
40
50
60
70
80
90
100
160 °C
5.80
3.18
2.30
1.85
1.57
1.38
1.24
1.14
1.06
0.99
A.9.2 Accuracy of Mixing Ratio g/kg (Ambient Pressure 1013
mbar)
Table 64
Accuracy of Mixing Ratio g/kg (Ambient Pressure 1013 mbar)
Relative Humidity (%RH)
Temp
10
20
30
40
50
60
70
80
90
100
-40 °C
0.003
0.003
0.003
0.003
0.003
0.004
0.004
0.004
—
—
-20 °C
0.017
0.018
0.019
0.021
0.022
0.023
0.025
0.026
—
—
0 °C
0.08
0.09
0.09
0.10
0.10
0.11
0.11
0.12
0.13
0.13
20 °C
0.31
0.33
0.35
0.37
0.39
0.41
0.43
0.45
0.47
0.49
40 °C
0.97
1.03
1.10
1.17
1.24
1.31
1.38
1.46
1.54
1.62
60 °C
2.68
2.91
3.16
3.43
3.72
4.04
4.38
4.75
5.15
5.58
80 °C
6.73
7.73
8.92
10.34
12.05
14.14
16.71
19.92
24.01
29.29
100 °C
16.26
21.34
28.89
40.75
60.86
98.85
183.66
438.56 —
—
120 °C
40.83
74.66
172.36
—
—
—
—
—
—
—
A.9.3 Accuracy of Wet Bulb Temperature °C
Table 65
Accuracy of Wet Bulb Temperature °C
Relative Humidity (%RH)
Temp
10
20
30
40
50
60
70
80
90
100
-40 °C
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.20
—
—
-20 °C
0.21
0.21
0.22
0.22
0.22
0.22
0.23
0.23
—
—
0 °C
0.27
0.28
0.28
0.29
0.29
0.29
0.30
0.30
0.31
0.31
20 °C
0.45
0.45
0.45
0.44
0.44
0.44
0.43
0.43
0.42
0.42
40 °C
0.84
0.77
0.72
0.67
0.64
0.61
0.58
0.56
0.54
0.52
60 °C
1.45
1.20
1.03
0.91
0.83
0.76
0.71
0.67
0.63
0.60
80 °C
2.23
1.64
1.32
1.13
0.99
0.89
0.82
0.76
0.72
0.68
86
Appendix A – Calculation Formulas
Relative Humidity (%RH)
Temp
10
20
30
40
50
60
70
80
90
100
100 °C
3.06
2.04
1.58
1.31
1.14
1.01
0.92
0.85
0.80
0.75
120 °C
3.85
2.40
1.81
1.48
1.28
1.13
1.03
0.95
0.88
0.83
140 °C
4.57
2.73
2.03
1.65
1.41
1.25
1.13
1.04
0.97
0.91
160 °C
5.25
3.06
2.25
1.82
1.55
1.37
1.24
1.13
1.05
0.99
A.9.4 Accuracy of Absolute Humidity g/m3
Table 66
Accuracy of Absolute Humidity g/m3
Relative Humidity (%RH)
Temp
10
20
30
40
50
60
70
80
90
100
-40 °C
0.004
0.004
0.005
0.005
0.005
0.006
0.006
0.006
--
-
-20 °C
0.023
0.025
0.027
0.029
0.031
0.032
0.034
0.036
-
-
0 °C
0.10
0.11
0.12
0.13
0.13
0.14
0.15
0.15
0.16
0.17
20 °C
0.37
0.39
0.41
0.43
0.45
0.47
0.49
0.51
0.53
0.55
40 °C
1.08
1.13
1.18
1.24
1.29
1.34
1.39
1.44
1.49
1.54
60 °C
2.73
2.84
2.95
3.07
3.18
3.29
3.40
3.52
3.63
3.74
80 °C
6.08
6.30
6.51
6.73
6.95
7.17
7.39
7.61
7.83
8.05
100 °C
12.2
12.6
13.0
13.4
13.8
14.2
14.6
15.0
15.3
15.7
120 °C
22.6
23.3
23.9
24.6
25.2
25.8
26.5
27.1
27.8
28.4
140 °C
39.1
40.0
41.0
42.0
43.0
44.0
45.0
45.9
46.9
47.9
160 °C
63.5
64.9
66.4
67.8
69.2
70.7
72.1
73.5
74.9
76.4
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Index
Index
A
absolute humidity calculation............85
accessories...................................................9
accuracies of calculated variables... 85
accuracy of absolute humidity g/m3
87
accuracy of dewpoint temperature °C
85
accuracy of mixing ratio g/kg
(ambient pressure 1013 mbar)........ 86
accuracy of wet bulb temperature °C
86
adjusting humidity and temperature
with push buttons................................58
adjusting offset and gain with HMI41
68
adjusting RH with MI70 hand-held
indicator....................................................61
adjustment using HMI41 as reference
meter........................................................ 69
adjustment using HMI41 as terminal.71
adjustment with HM41.......................... 65
analog output configuration
commands..............................................40
analog output error notification....... 76
C
calculation formulas...............................82
calibration and adjustment
commands.............................................. 34
calibration and adjustment overview
57
compliance................................................. 12
connecting with a computer.............. 25
connections and selecting the
calibrator function............................... 67
constant output probe.......................... 10
D
device information and status........... 28
dew/frostpoint temperature
calculation.............................................. 83
dewpoint temperature calculation...82
drilling instructions for duct
installation kit......................................... 19
duct installation........................................ 17
E
enthalpy calculation...............................85
error codes................................................ 74
ESD protection..........................................12
F
fixed and remote probe models........ 10
H
HMT130 component board...................21
HMT130 overview...................................... 9
I
installing with radiation shield............16
installing with rain shield.......................15
interchangeable probe.......................... 10
introduction.................................................9
L
list of serial commands......................... 27
M
maintenance: testing analog outputs
55
measurement parameter
configuration commands..................39
MI70 adjustment: 1-point adjustment
with calibrator....................................... 63
MI70 adjustment: 2-point adjustment
with calibrator....................................... 63
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HMT130 User Guide
MI70 adjustment: field checking and
adjustment using a calibrated
reference probe.................................... 62
MI70 adjustment: LiCl- NaCl
adjustment............................................. 64
MI70 adjustment: temperature field
check and adjustment using a
calibrated reference probe...............65
mixing ratio calculation........................ 83
M211280EN-C
solving typical problems......................75
spare parts and accessories............... 79
specifications............................................77
T
trademarks...................................................8
transmitter dimensions........................ 80
transmitter parts....................................... 11
troubleshooting HMI41 adjustment..72
O
opening transmitter cover....................13
optional display........................................10
other serial line commands................ 45
U
USB driver..................................................24
user port operation serial commands
49
using service port................................... 24
P
probe assembly with duct installation
kit................................................................ 18
probe mounting clamp..........................19
probe mounting flange........................ 20
W
wall mounting........................................... 14
water vapor pressure calculation..... 84
wiring........................................................... 22
push-button calibration........................58
R
relay output configuration.................. 43
removing and fastening fixed probe
53
removing and fastening remote
probe........................................................ 54
replacing the HUMICAP sensor.........56
RS-485 bus termination....................... 23
S
safety............................................................ 12
saturation vapor pressure calculation
84
serial interface settings........................ 24
serial line operation commands........ 37
serial line output and communication
commands.............................................. 32
service port............................................... 24
90
Warranty
For standard warranty terms and conditions, see www.vaisala.com/warranty.
Please observe that any such warranty may not be valid in case of damage due to normal wear
and tear, exceptional operating conditions, negligent handling or installation, or unauthorized
modifications. Please see the applicable supply contract or Conditions of Sale for details of the
warranty for each product.
Technical Support
Contact Vaisala technical support at [email protected] Provide at least the
following supporting information:
• Product name, model, and serial number
• Name and location of the installation site
• Name and contact information of a technical person who can provide further
information on the problem
For more information, see www.vaisala.com/support.
Recycling
Recycle all applicable material.
Follow the statutory regulations for disposing of the product and packaging.
91
HMT130 User Guide
92
M211280EN-C
www.vaisala.com
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