Vaisala HMD62 User manual

M212016EN-A
User Guide
HMD60 Series Humidity and Temperature
Transmitters for Ducts in HVAC
HMD62 TMD62

PUBLISHED BY
Vaisala Oyj
Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland
P.O. Box 26, FI-00421 Helsinki, Finland
[phone]
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,
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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.
This product may contain open
source software (OSS)
components. In the event this
product contains OSS
components, then such OSS is
governed by the terms and
conditions of the applicable OSS
licenses, and you are bound by
the terms and conditions of such
licenses in connection with your
use and distribution of the OSS in
this product. Applicable OSS
licenses are included in the
product itself or provided to you
on any other applicable media,
depending on each individual
product and the product items
delivered to you.

Table of Contents
1. About This Document................................................................................... 3
1.1 Version Information.......................................................................................... 3
1.2 Related Manuals................................................................................................ 3
1.3 Documentation Conventions...........................................................................3
1.4 Trademarks........................................................................................................ 4
2. Product Overview........................................................................................... 5
2.1 Introduction to HMD60 Series.........................................................................5
2.2 HMD60 Series Basic Features and Options................................................... 5
2.3 Available Parameters and Default Scaling.....................................................5
2.4 Connectivity to Vaisala Insight Software....................................................... 6
2.5 HMD60 Transmitter Parts.................................................................................7
2.5.1 Cable Gland and Conduit Options...........................................................8
2.5.2 Filter Options..............................................................................................8
2.5.3 Transmitter Board......................................................................................9
2.5.4 Trimmers................................................................................................... 10
2.5.5 DIP Switch Output Selection (HMD62)...................................................11
2.6 Filtering Factor.................................................................................................12
2.7 Environmental Compensation (HMD62).......................................................12
3. Installation........................................................................................................ 13
3.1 HMD60 Dimensions.........................................................................................13
3.2 Duct Mounting Overview................................................................................14
3.3 Installing into Duct.......................................................................................... 15
3.4 Wiring............................................................................................................... 16
4. Calibration and Adjustment...................................................................... 18
4.1 Calibration and Adjustment Overview..........................................................18
4.2 Calibration and Adjustment Using Trimmers...............................................18
4.2.1 1-Point Adjustment Using Trimmers and Reference Calibrator..........19
4.2.2 Adjusting Output Using Trimmers and Reference
Transmitter (1-point adjustment)........................................................... 19
4.2.3 Resetting Trimmers Back to Zero......................................................... 20
4.3 Calibration and Adjustment with Insight PC Software............................... 21
4.3.1 2-Point Adjustment with Insight and Reference Calibrator...............22
4.3.2 1-Point Adjustment with Insight and Reference Transmitter............. 23
4.4 Calibration and Adjustment with MI70 Hand-Held Indicator................... 24
4.4.1 1-Point Adjustment Using Reference Environment.............................24
5. Operating with Insight PC Software..................................................... 27
5.1 Vaisala Insight Software.................................................................................27
5.2 Connecting to Insight Software.................................................................... 27
5.3 Insight Main View............................................................................................28
5.3.1 Basic and Advanced User Modes.......................................................... 28
Table of Contents
1

5.4 Configuring Analog Outputs with Insight................................................... 29
5.4.1 Testing and Adjusting Analog Output Current (mA) Level............... 30
5.5 Configuring Minimum and Maximum RH and T Errors with Insight..........31
5.6 Changing Pressure Compensation Settings with Insight (HMD62)......... 33
5.7 Setting Filtering Factor with Insight............................................................ 34
6. Operating with MI70 Indicator................................................................35
6.1 Overview of MI70 Support............................................................................ 35
6.1.1 MI70 Indicator Parts................................................................................35
6.2 Connecting HMD60 to MI70 Indicator.........................................................36
6.3 Basic Display................................................................................................... 37
6.4 Graphical Display............................................................................................ 37
6.5 Main Menu....................................................................................................... 38
6.6 Holding and Saving the Display....................................................................38
6.7 Recording Data...............................................................................................39
7. Maintenance and Troubleshooting....................................................... 40
7.1 Cleaning.......................................................................................................... 40
8. Technical Data.................................................................................................41
8.1 Specifications...................................................................................................41
8.2 HMD60 Dimensions....................................................................................... 44
8.3 Spare Parts and Accessories.........................................................................45
Warranty....................................................................................................................... 47
Technical Support..................................................................................................... 47
Recycling...................................................................................................................... 47
HMD62 TMD62 User Guide M212016EN-A
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1. About This Document
1.1 Version Information
Table 1 Document versions
Document Code Date Description
M212016EN-A September 2018 This manual. First version of the document.
1.2 Related Manuals
Table 2 Related Manuals
Document Code Description
M212049EN HMD60 Series Humidity and Temperature Transmitters for Ducts in
HVAC HMD62 and TMD62 Quick Guide
1.3 Documentation Conventions
alerts you to a serious hazard. If you do not read and follow
instructions carefully at this point, there is a risk of injury or even death.
WARNING!
warns you of a potential hazard. If you do not read and follow
instructions carefully at this point, the product could be damaged or important
data could be lost.
CAUTION!
Note highlights important information on using the product.
Tip gives information for using the product more eciently.
Chapter 1 – About This Document
3

1.4 Trademarks
Vaisalaâand HUMICAPâare registered trademarks of Vaisala Oyj.
Windowsâis either a registered trademark or trademark of Microsoft Corporation in the
United States and other countries.
All other product or company names that may be mentioned in this publication are trade
names, trademarks, or registered trademarks of their respective owners.
HMD62 TMD62 User Guide M212016EN-A
4

2. Product Overview
2.1 Introduction to HMD60 Series
The duct mounted HMD60 HUMICAPâHumidity and Temperature Transmitters are designed
for monitoring humidity and temperature in demanding HVAC and light industrial applications.
HMD60 series transmitters provide stable, reliable, and highly accurate (up to ±1.5 %RH and
±0.1 °C (0.18 °F) measurements, and are resistant to chemicals and dust.
HMD60 series transmitter options include two analog output models: HMD62 for measuring
both humidity and temperature, and TMD62 for temperature measurements. Both HMD62 and
TMD62 use 4 ... 20 mA loop powered current output.
Thanks to easy access to electronics also when the transmitter is installed to a duct,
configuration and adjustment can be carried out quickly and conveniently. Available
configuration and adjustment interface options range from physical trimmers and DIP switches
on the transmitter's circuit board to Vaisala Insight PC software for Windowsâ.
2.2 HMD60 Series Basic Features and Options
• Two analog transmitter model options:
• HMD62 for humidity and temperature measurement
• TMD62 for temperature measurement
• Humidity parameters available as output options in HMD62: RH, Td, Tdf, A, X, Tw, H
• Default temperature analog output scale: -20 … +80 °C (-4 … +176 °C)
• Analog output: 4 ... 20 mA, loop powered
• HMD62: 2 analog output channels for humidity and temperature measurements
• TMD62: 1 analog output channel for temperature measurement
• Power supply input: 10 ... 35 VDC / 20 ... 35 VDC
•Configuration and adjustment options:
• RH and T measurement field adjustment with trimmers
• Humidity output parameter selection with DIP switches (HMD62)
• Field adjustment with MI70 hand-held indicator
•Configuration and adjustment with Vaisala Insight PC software
2.3 Available Parameters and Default Scaling
HMD62 Measurement Parameters and Default Analog Output
Scaling
Table 3 (page 6) shows the available output parameters and the default analog output
scaling of the parameters for HMD62.
Chapter 2 – Product Overview
5

Table 3 HMD62 Measurement Parameters and Default Scaling
Parameter Default Scaling for 4 … 20 mA Output Range
Relative humidity (RH) 0 … 100 %RH
Dew point temperature (Td) -40 ... +80 °C (-40 ... +176 °F)
Dew point/frost point
temperature (Tdf)
-40 ... +80 °C (-40 ... +176 °F)
Absolute humidity (A) 0 … 300 g/m3(0 … 131.1 gr/ft3)
Mixing ratio (X) 0 … 600 g/kg (0 … 4200 gr/lb)
Wet-bulb temperature (Tw) -40 ... +80 °C (-40 ... +176 °F)
Enthalpy (H) -40 … 1600 kJ/kg (-9.5 ... 695.6 Btu/lb)
TMD62 Measurement Parameters and Default Analog Output
Scaling
Table 4 (page 6) shows the available output parameters and the default analog output
scaling of the parameters for TMD62.
Table 4 TMD62 Measurement Parameters and Default Scaling
Parameter Default Scaling for 4 … 20 mA Output Range
T -20 ... +80 °C (-4 ... +176 °F)
Changing Measurement Parameter Scaling
If your application requires an analog output scaling that diers from the defaults shown in
Table 3 (page 6) and Table 4 (page 6), you can configure the scaling by connecting the
transmitter to Vaisala Insight PC software (requires Vaisala USB cable 219690).
2.4 Connectivity to Vaisala Insight Software
The transmitter can be connected to Vaisala Insight software using a Vaisala USB cable (order
code 219690). With the Insight software, you can:
• Calibrate and adjust the measurement.
• See device information and status.
• See real-time measurement.
•Configure output parameters and scaling.
More Information
‣Connecting to Insight Software (page 27)
HMD62 TMD62 User Guide M212016EN-A
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2.5 HMD60 Transmitter Parts
12
3
4
56
7
8
9
Figure 1 HMD62 and TMD62 Transmitter Parts Overview
1Captive screw (2 pcs, cross-head) for attaching the lid of the transmitter.
2Screw (2 pcs) for mounting the transmitter on the installation surface.
3Transmitter lid. Open the captive screws of the lid to access input and output electronics.
4Transmitter base. Contains the input and output connectors on the transmitter board.
5Cable gland (M16 x 1.5 inlet) for leading wires into the transmitter.
6Alternative inlet (M20 x 1.5) for wiring.
7Probe body (250 mm (9.84 in) with filter).
8Probe filter (default option: AISI 316L stainless steel).
9HUMICAPâsensor inside the probe filter.
Do not touch the sensor element.CAUTION!
Chapter 2 – Product Overview
7

2.5.1 Cable Gland and Conduit Options
HMD60 has 2 inlets (M16x1.5 and M20x1.5) that can be used with a variety of cable gland and
conduit options. Figure 2 (page 8) shows the cable gland and conduit options available
from Vaisala.
1
2
Figure 2 HMD60 Cable Gland and Conduit
Options
1Cable Gland and O-ring M16 x 1.5
(Vaisala order code: 254280SP). This is
the default option delivered with
HMD60.
2Conduit fitting and O-ring (M16x1.5 /
NPT1/2") (Vaisala order code:
210675SP).
2.5.2 Filter Options
Figure 3 (page 8) shows the filter options available for HMD60.
1 2
Figure 3 HMD60 Filter Options
1Metal Grid with PTFE Membrane (Vaisala order code ASM212652SP). This is the default
option delivered with HMD60.
2Sintered Filter (Vaisala order code HM46670SP).
HMD62 TMD62 User Guide M212016EN-A
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2.5.3 Transmitter Board
1
3
4
5
6
2
Figure 4 HMD60 Transmitter Board: Service Port, DIP switches, Trimmers and Screw Terminals
1Service port for MI70 hand-held indicator and Insight PC software cable connection.
2DIP switches for humidity parameter selection (HMD62).
3Trimmer for humidity measurement adjustment (HMD62).
4Screw terminals for humidity measurement output (HMD62).
5Screw terminals for temperature measurement output.
6Trimmer for temperature measurement adjustment.
The HMD62 board (shown in Figure 4 (page 9)) includes options for both
humidity and temperature output. The TMD62 board includes only components
limited to temperature output options. See Wiring (page 16) for more
information.
Chapter 2 – Product Overview
9

2.5.4 Trimmers
1
Figure 5 HMD60 Adjustment Trimmer
1Use a Phillips head screwdriver to
rotate the RH or T adjustment trimmer.
To increase the measurement output
value, rotate the trimmer clockwise. To
decrease, rotate counterclockwise.
Note that there is a slight delay before
the measurement output changes
after rotating the trimmer.
You can adjust the transmitter's RH (HMD62) or T (HMD62 and TMD62) measurement output
with the trimmers on the component board. During trimmer adjustment, the output of the
transmitter is corrected using the trimmers until the output matches the known value of a
reference.
±0 %RH
−1 %RH
−2 %RH
−3 %RH
−4 %RH
−5 %RH
+1 %RH
+2 %RH
+3 %RH
+4 %RH
+5 %RH
±0 °C
−0.06 °C
−0.12 °C
−0.18 °C
−0.24 °C
−0.3 °C
+0.06 °C
+0.12 °C
+0.18 °C
+0.24 °C
+0.3 °C
HMD62: −5 %RH ... +5 %RH TMD62, HMD62: −0.3 °C ... +0.3 °C
RH T
Figure 6 RH and T Trimmer Adjustment Ranges (Indicative)
You can only calibrate the relative humidity measurement (RH) and temperature
measurement (T). Other parameters (available for HMD62) are calculated
internally based on RH and T. Check that the output selection DIP switch is set to
RH when making adjustments with the physical trimmer; when using the Insight
PC software, set all DIP switches to the OFF position.
If you use the Insight PC software to adjust the measurement or to
restore the factory settings, always return the physical trimmer to the middle
position before starting. When you make an adjustment with Insight, the
position in which the trimmer is at that point is set as the ±0 point.
CAUTION!
HMD62 TMD62 User Guide M212016EN-A
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2.5.5 DIP Switch Output Selection (HMD62)
Figure 7 HMD62 DIP Switch Example: Tdf
Output Selected
RH Relative humidity
Td Dew point temperature
Tdf Dew point/frost point temperature
AAbsolute humidity
XMixing ratio
Tw Wet-bulb temperature
HEnthalpy
You can change the humidity parameter that is output on the RH channel of HMD62 with the
DIP switches on the component board. Select the parameter you want the transmitter to
output by sliding the parameter's DIP switch to the right (ON). In the example in Figure 7
(page 11), the transmitter's selected output parameter is dew point/frost point temperature
(Tdf). Keep the other DIP switches in the OFF position (left).
The selected parameter uses the default scaling shown in Table 5 (page 11).
Table 5 HMD62 Default Parameter Scaling
Parameter Default Scaling for 4 … 20 mA Output Range
RH 0 … 100 %RH
Td-40 ... +80 °C (-40 ... +176 °F)
Tdf -40 ... +80 °C (-40 ... +176 °F)
A0 … 300 g/m3(0 … 131.1 gr/ft3)
X 0 … 600 g/kg (0 … 4200 gr/lb)
Tw-40 ... +80 °C (-40 ... +176 °F)
H -40 … 1600 kJ/kg (-9.5 ... 695.6 Btu/lb)
If you use the Insight software to further configure the output, note
that the DIP switch selections override the Insight configuration. When using
Insight to configure the output, set all DIP switches to the OFF position (left) to
ensure they do not cause a conflict with the Insight settings.
CAUTION!
Chapter 2 – Product Overview
11

2.6 Filtering Factor
If the measuring environment produces occasional exceptionally high or low readings that
need to be averaged out in the output, you can apply a filtering factor to the RH or T output
(filtering factor range: 0.001 … 1.000). The filtering factor defines the speed at which the latest
measurement is integrated into the transmitter's output. By default, the filtering factor is set to
0.500, which means that the displayed output is a 50%+50% combination of the previous
measurement and the most recent measurement. To show the latest measurement directly in
the output, set the filtering factor to 1.000 (no filtering).
The following formula is used when calculating the output:
new =old +new  old ×
onew New output
oold Previous output
mnew New measurement
fFiltering factor
The filtering factor can be configured with the Insight PC software.
More Information
‣Setting Filtering Factor with Insight (page 34)
2.7 Environmental Compensation (HMD62)
By default, the pressure value used in HMD62 measurement calculation in 1013.2 hPa. If the
pressure of your measurement environment diers from this, you can configure the
transmitter's pressure compensation value with the Insight PC software.
More Information
‣Changing Pressure Compensation Settings with Insight (HMD62) (page 33)
HMD62 TMD62 User Guide M212016EN-A
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3. Installation
3.1 HMD60 Dimensions
The dimensions are given in millimeters and [inches].
299 [11.77]
49 [1.92] 250 [9.84]
101 [3.97]
mm
[in]
101 [3.97]
82[3.23]
82 [3.23]
Ø 12 [0.47]
Figure 8 HMD60 Dimensions
Chapter 3 – Installation
13

3.2 Duct Mounting Overview
90°
1
4
3
2
567
Figure 9 Duct Installation Overview
1Make sure there is a minimum clearance of 5 m (16.5 ft) between the probe and any
possible humidifier. Avoid installing in a location where condensation can fall on the
sensor inside the duct.
2When installing the probe, drill a second hole approximately 30 cm (12 in) from the
HMD60 probe's installation hole, towards the direction of the air flow, and plug it with a
removable seal. This second hole is intended for later use in reference measurement when
calibrating or adjusting the transmitter.
3Check that the duct diameter is suitable for the 250 mm (9.85 in) probe body. Ideally, the
sensor should be installed in the middle of the duct.
4Maximum air flow speed: 50 m/s (with sintered filter).
5Avoid installing the probe in dead legs. Supersaturation can occur in areas where there is
no air flow.
6Do not install the probe in a downward angle. Condensation can travel to the sensor along
the probe body if the probe points down.
7Install the probe in a 90° angle so that the sensor is placed as close to the middle of the
duct as possible.
HMD62 TMD62 User Guide M212016EN-A
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3.3 Installing into Duct
• Medium size crosshead screwdriver for mounting screws and lid screws.
• Small slotted screwdriver for screw terminals.
• Drill with 3.5 mm (0.14 in) and 13 … 15 mm (0.51 … 0.59 in) bits for making the
installation holes.
• Tools for cutting and stripping wires.
2 x Ø 3.5 [0.14]
Ø 13 ... 15 [0.51 ... 0.59]
Ø 12 [0.47]
82 [3.23]
82 [3.23]
mm
[in]
Ø 3.5 [0.14]
Ø 3.5 [0.14]
3.1 ... 3.4 Nm [2.3 ... 2.5 ft-lbs]
Figure 10 Drilling and Mounting Screws
1. Select an installation location for the transmitter on the duct surface and drill a
Ø 13 … 15 mm (0.51 … 0.59 in) hole for inserting the probe.
2. Push the probe through the hole on the duct until the transmitter body meets the duct.
3. Attach the transmitter body to the duct with 2 Ø 3.5 mm (0.14 in) screws.
Check that the insulation ring sits tightly over the installation hole. If the duct
has a negative pressure, external air can be drawn into the duct and aect
the measurement if the installation hole is not sealed tightly.
4. Optional: Drill a second hole for reference measurements approximately 30 cm (12 in)
from the HMD60 probe's installation hole, towards the direction of the air flow.
5. Open the 2 captive screws on the transmitter body and remove the lid.
6. Attach the input/output wiring to the screw terminals on the transmitter component
board. See Wiring (page 16). Tighten cable glands firmly after wiring.
7. Check that the DIP switches and trimmers are in the correct position. See DIP Switch
Output Selection (HMD62) (page 11) and Trimmers (page 10).
Chapter 3 – Installation
15

8. Close the transmitter lid and switch on the transmitter's power supply input.
3.4 Wiring
HMD62
TMD62
mA
mA
mA
mA
+
+
mA
mA
+
Shield
Current loop 1:
RH, 4 ... 20 mA
Current loop 2:
T, 4 ... 20 mA
Current loop 1:
T, 4 ... 20 mA
Shield
Supply voltage for
each current loop:
20 ... 35 VDC at 600 Ω
10 ... 35 VDC at 0 Ω
Figure 11 HMD62 and TMD62 Wiring Diagrams
Make sure that you prepare or connect only de-energized wires.WARNING!
HMD62 TMD62 User Guide M212016EN-A
16

Using a power supply with overload protection is recommended for electrical
safety.
Chapter 3 – Installation
17

4. Calibration and Adjustment
4.1 Calibration and Adjustment Overview
You can calibrate or adjust the transmitter's measurement output using one of the following
options:
• 1-point adjustment with the RH and T trimmers on the HMD60 component board
(adjustment range: -5%RH … +5 %RH and -0.3 °C … +0.3 °C (-0.54 °F … +0.54 °F).
• 1-point or 2-point adjustment by connecting the transmitter to Vaisala Insight PC software
(requires USB cable 219690).
• 1-point adjustment by connecting the transmitter to an MI70 hand-held indicator (requires
MI70 connection cable 219980SP).
4.2 Calibration and Adjustment Using Trimmers
HMD60 transmitters have separate trimmers for RH and T measurement output adjustment
mounted on the component board. The trimmers allow for easy 1-point adjustment of the
measurement output against a reference with a known value.
The transmitters are shipped with the trimmers centered. Turning the trimmer counter-
clockwise decreases the measurement output value, and turning clockwise increases the value.
Figure 12 (page 18) shows the trimmer adjustment ranges for RH and T (-5 %RH … +5 %RH
and -0.3 °C … +0.3 °C ( -0.54 °F … +0.54 °F).
±0 %RH
−1 %RH
−2 %RH
−3 %RH
−4 %RH
−5 %RH
+1 %RH
+2 %RH
+3 %RH
+4 %RH
+5 %RH
±0 °C
−0.06 °C
−0.12 °C
−0.18 °C
−0.24 °C
−0.3 °C
+0.06 °C
+0.12 °C
+0.18 °C
+0.24 °C
+0.3 °C
HMD62: −5 %RH ... +5 %RH TMD62, HMD62: −0.3 °C ... +0.3 °C
RH T
Figure 12 RH and T Adjustment Trimmer Ranges
The trimmers will only turn 135 degrees each way, less than half a rotation. Do not
force the trimmer past the stopping point.
HMD62 TMD62 User Guide M212016EN-A
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