No part of this document 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 documents 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 document are subject
to change without prior notice.
Local rules and regulations may vary and
they shall take precedence over the
information contained in this document.
Vaisala makes no representations on this
document’s compliance with the local
rules and regulations applicable at any
given time, and hereby disclaims any and
all responsibilities related thereto.
This document 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.
Page 3
Table of contents
Table of contents
1.About this document.....................................................................................7
Table 9DMP80 series operating environment.........................................................40
Table 10DMP80 series inputs and outputs.................................................................40
Table 11DMP80 series output parameters.................................................................. 41
Table 12DMP80 series compliance................................................................................ 41
Table 13DMP80 series mechanical specifications..................................................... 41
Table 14DMP80 series spare parts and accessories.................................................42
Table 15Materials for recycling......................................................................................44
6
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Chapter 1 – About this document
1. About this document
1.1 Version information
This document provides instructions for using and maintaining Vaisala DMP80 DRYCAPâ
Handheld Dew Point and Temperature Probes.
Table 1 Document versions (English)
Document codeDateDescription
M212904EN-AJune 2023First version.
1.2 Related manuals
For the latest versions of these documents, see docs.vaisala.com.
Table 2 Related manuals
Document codeName
M212722ENVaisala Indigo80 Handheld Indicator User Guide
M212804ENVaisala DMP80 Series Handheld Probes Quick Guide
M212903ENVaisala HMP80 Series Handheld Probes User Guide
M212803ENVaisala HMP80 Series Handheld Probes Quick Guide
1.3 Documentation conventions
WARNING!
follow instructions carefully at this point, there is a risk of injury or even death.
CAUTION!
follow instructions carefully at this point, the product could be damaged or
important data could be lost.
Warning alerts you to a serious hazard. If you do not read and
Caution warns you of a potential hazard. If you do not read and
7
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DMP80 Series User GuideM212904EN-A
Note highlights important information on using the product.
1.4 Trademarks
Vaisalaâ and DRYCAPâ are registered trademarks of Vaisala Oyj.
Microsoftâ and Windowsâ are either registered trademarks or trademarks 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.
8
Page 9
Chapter 2 – Product overview
2. Product overview
Vaisala DRYCAPâ Handheld Dew Point and Temperature Probes DMP80 Series have been
designed for portable spot-checking, field calibration, and data logging use with the Indigo80
handheld indicator. For easy access to device analytics and configuration, DMP80 probes can
be connected to Vaisala Insight software for Windows.
The DMP80 series probes are available in two product models with dierent dew point
measurement ranges. Connection thread alternatives include ISO G1/2" and NPT 1/2" threads.
The IP66-classified probe handle oers protection against moisture and dust with the probe
connection cable attached. Also the cable connection is protected against mechanical stress
by the robust design of the handle.
For more information on the Indigo product family, see www.vaisala.com/indigo.
The free Insight PC software is available for download at www.vaisala.com/insight.
2.1
Basic features and options
• Portable design optimized for industrial spot-checking and field calibration
• Wide dew point measurement range
• Condensation-tolerant
• Sensor purge improves long-term stability and chemical resistance
• Compatible with Indigo80 handheld indicator and Insight PC software
More information
‣
Indigo80 handheld indicator (page 21)
‣
Vaisala Insight PC software (page 28)
2.2
DMP80A and DMP80B probe models
The DMP80A probe model contains the DRYCAPâ 180S sensor, making the probe optimal for
dew point measurements in humid applications. The DMP80B probe uses the DRYCAP 180M
sensor, which has been optimized for measurements in dry environments.
Table 3 DMP80A and DMP80B temperature ranges
PropertyDMP80ADMP80B
Dew point temperature measurement
range
Temperature measurement range0 … +60 °C (+32 … +140 °F)
Operating temperature range−10 … +60 °C (+14 … +140 °F)
−40 … +60 °C
(−40 … +140 °F) T
−70 … +60 °C
d/f
(−76 … +140 °F) T
d/f
9
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25
[0.98]
47 [1.9]
mm [in]
103 [4.1] 63 [2.5]
262 [10]
Ø 12 [0.5]
41 [1.6]
11 [0.43]
22
[0.87]
22
[0.87]
probe handle detachable
end piece
25
[0.98]
47 [1.9]
mm [in]
103 [4.1] 63 [2.5]
262 [10]
Ø 12 [0.5]
41 [1.6]
5 [0.2]
22
[0.87]
28
[1.1]
probe handle detachable
end piece
DMP80 Series User GuideM212904EN-A
The identifying letter of each probe model is included in the configuration code of the probe,
shown on the side of the device. Example codes: AG1A0AS0 for a DMP80A probe, and
BG1A0AS0 for a DMP80B probe.
Figure 1 Dimensions of DMP80 series probes with G1/2" thread, side and bottom view
Figure 2 Dimensions of DMP80 series probes with NPT1/2" thread, side and bottom view
2.3
DMP80 output parameters
Values of all available output parameters are locked (showing the latest valid
value) when sensor purge, autocalibration, or condensation prevention functions
are active.
Table 4 DMP80 series output parameters
Output parameter name and unit
Absolute humidity (g/m3)
Absolute humidity at NTP (g/m3)
Relative humidity (%RH)
Relative humidity (dew/frost) (%RH)
Dew point temperature (°C)Temperature (°C)
Dew/frost point temperature (°C)Water concentration (ppmv)
Dew/frost point temperature at 1 atm (°C)Water concentration (wet basis) (vol‑%)
Dew point temperature at 1 atm (°C)Water mass fraction (ppmw)
Dew point temperature dierence (°C)Water vapor pressure (hPa)
Figure 3 DMP80 probe parts (model with
G1/2" thread shown)
1Protection cap (remove before use)
2Location of sensors on the probe head,
inside a removable filter
3Probe shaft with G1/2" thread (also
model with NPT1/2" thread available)
4Probe handle with type label. Contains
component board and electronics
housing.
5M12-5M A-coded connector (inside the
probe handle)
6Detachable end piece of the probe
handle, protecting the cable connector
inside the handle
1)
1) The DRYCAPâ 180S and 180M sensors
used in DMP80 series probes are not user
replaceable. To have the sensor replaced,
contact a Vaisala Service Center.
More information
‣
Recycling instructions (page 44)
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DMP80 Series User GuideM212904EN-A
2.5 Sampling cell accessories for DMP80 probe
models with ISO G1/2" thread
The following sampling cells are available as accessories for DMP80 series probe models with
ISO G1/2" thread. For information on ordering the items, see store.vaisala.com.
Table 5 Sampling cells for DMP80 probes
ItemFeaturesNotes
DSC74• Sampling cell with quick connector
and leak screw, thread G3/8"
• Quick coupling, type NIP08, type D
• Thread adapter, type G3/8" - G1/4"
• Thread adapter, type G3/8" - G1/2"
(for DMT242 fittings)
For sampling from a
pressurized process, where
the process pressure forces
the sample gas into the
sample cell.
DSC74B• Two-pressure sampling cell, thread
G3/8"
• Connection part with a needle valve
and an integrated leakage screw
• Diusion coil (for measurements in
atmospheric pressure)
An enhanced version of
DSC74. With version
DSC74B, harmful gases can
be recovered.
Designed for measurements
at atmospheric pressure.
Contains a diusion coil
connected to the sampling
cell outlet for protecting the
sensor from ambient
humidity.
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Chapter 2 – Product overview
ItemFeaturesNotes
DMT242SC• Sampling cell with female
connectors, inlet G3/8", outlet G1/4"
A basic sampling cell
consisting of only the main
sampling cell body. Suitable
for users requiring only a
sampling cell to fit the
probe into and doing
further assembly by
themselves.
DMT242SC2• Sampling cell with Swagelok
More information
‣
Spare parts and accessories (page 42)
2.6
Safety
WARNING!
connectors for 1/4" tubing
When returning a product for calibration or repair, make sure it
has not been exposed to dangerous contamination, and is safe to handle
without special precautions.
CAUTION!
Do not attempt to open the solid part of the probe handle. There
are no user serviceable parts inside the probe handle.
CAUTION!
Do not touch the probe head with your bare hands. Touching will
deposit impurities on the probe head.
The Swagelok connectors of
DMT242SC2 connect easily
to a cooling coil or tubing,
providing the essential
function of cooling the dry
air to ambient temperature
before it reaches the sensor.
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DMP80 Series User GuideM212904EN-A
2.7 ESD protection
Electrostatic discharge (ESD) can damage electronic circuits. Vaisala products are adequately
protected against ESD for their intended use. However, it is possible to damage the product by
delivering electrostatic discharges when touching, removing, or inserting any objects in the
equipment housing.
To avoid delivering high static voltages to the product:
• Handle ESD‑sensitive components on a properly grounded and protected ESD workbench
or by grounding yourself to the equipment chassis with a wrist strap and a resistive
connection cord.
• If you are unable to take either precaution, touch a conductive part of the equipment
chassis with your other hand before touching ESD‑sensitive components.
• Hold component boards by the edges and avoid touching component contacts.
14
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Chapter 3 – Functional description
3. Functional description
3.1 DRYCAP® technology
Vaisala DRYCAPâ dew point measurement technology ensures accurate measurement with
excellent long term stability. Its unrivalled performance is based on two innovations: the
proven capacitive thin-film polymer sensor and the self-diagnostic functions that the software
performs automatically as needed.
The sensor’s thin-film polymer absorbs or releases water vapor as the surrounding humidity
increases or decreases. The dielectric properties of the polymer change as the humidity
around the sensor changes, as does the capacitance of the sensor. Capacitance is converted
into a humidity reading. The capacitive polymer sensor is bonded together with a temperature
sensor, and dew point is calculated from the humidity and temperature readings.
The automatic sensor functions are called autocalibration, sensor purge, and sensor warming.
They are a key element in achieving the stability, rapid response time, and condensation
resistance of the DRYCAPâ sensors.
3.2
Autocalibration
Autocalibration of the DRYCAP sensor optimizes measurement stability in dry environments.
During autocalibration the sensor is warmed for a short period (< 1 min) and the sensor
capacitance values are evaluated at the elevated temperature. The possible dry end drift is
then corrected to correspond to the calibrated values. During autocalibration the values of all
available output parameters are locked (showing the latest valid value).
DMP80 series probes perform autocalibration at 1-hour intervals, and whenever sensor purge
is performed. When measuring very dry conditions, the probe performs autocalibration at
shorter intervals. A significant change in dew point or temperature may also trigger
autocalibration.
Autocalibration is carried out only if several criteria for the measurement environment are
fulfilled. This ensures the reliability of the adjustments, and maintains the excellent long term
stability that the patented technology oers. These criteria include, for example, a stable
enough moisture level in the measured atmosphere. If the conditions are not fulfilled, the
autocalibration function is postponed until satisfactory conditions are reached.
Sometimes autocalibration fails to complete successfully due to changes in measurement
conditions. This is normal, and is not a problem as autocalibration will be reattempted
automatically. However, autocalibration should eventually succeed to maintain the accuracy of
the probe.
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DMP80 Series User GuideM212904EN-A
3.3 Sensor purge
Sensor purge is an automatic procedure that minimizes the drift at the wet end readings of the
dew point measurement. The sensor is heated to a high temperature which evaporates all
excess molecules out of the sensor polymer. This, together with autocalibration, results in a
very small drift of the sensor due to the very linear behavior of the polymer technology.
By default, DMP80 probes perform sensor purge when they are powered on (known as startuppurge), and at one day intervals (known as interval purge). If necessary, the purge settings
can be configured with the Insight software or the Indigo80 handheld indicator. However,
Vaisala recommends leaving the sensor purge settings at their default values.
As with autocalibration, during sensor purge the values of the measurement parameters are
frozen at their last measured values prior to the procedure.
3.4 Condensation prevention functions
The sensor warming feature of the condensation prevention function is intended for improving
the condensation tolerance of the probe. It warms the humidity sensor when necessary to
keep the sensor's temperature above the dew point of the measurement environment. When
sensor warming is activated, all temperature-dependent output parameters become
unavailable, unless the temperature compensation setting is set to read the temperature from
an external source. The output parameters become available again 4 minutes after the
warming is stopped.
The humidity limit where sensor warming activates is:
• 80 %RH for DMP80A probes with S sensors
• 70 %RH for DMP80B probes with M sensors
In addition, the DRYCAP® sensor is kept continuously warmed in freezing conditions to ensure
fast response time. Therefore, the temperature and dependent parameters are continuously
unavailable if process temperature is below 0 °C / 32 °F.
3.5
Environmental compensation
Environmental compensations improve the measurement accuracy of the probe. You can
configure the settings with the Insight software or the Indigo80 handheld indicator.
Pressure compensation
The pressure of the measured environment aects the accuracy of humidity calculations,
especially calculations that are dependent on pressure (for example, mixing ratio). To achieve
accurate output of all humidity parameters, you are recommended to update the value of the
pressure compensation setpoint to match the environmental pressure when installing the
probe.
16
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Chapter 3 – Functional description
For example, when you install the probe in a process with a pressure diering from normal
atmospheric pressure, update the correct pressure into the pressure compensation setpoint
parameter or register of the probe using the Insight software or the Indigo80 handheld
indicator.
The entered value is persistent and remains unchanged at device restart.
Temperature compensation
You need to set an external source for the temperature compensation setpoint if the sensor
warming feature of the condensation prevention function prevents the probe's own
temperature measurement, and the output parameters that require temperature information
to be known are required.
When warming is active, values of output parameters that depend on temperature
measurement (for example, relative humidity) are unavailable, unless temperature information
is read from an external source. Output parameters that can be measured or calculated
without this external temperature information, such as dew point temperature, are available
even without the temperature input.
The external temperature source can be another probe that is connected to the same Indigo80
handheld indicator as your probe.
To get the most accurate measurement values, the external source needs to be able to provide
the temperature compensation setpoint value constantly in real time, and the value needs to
correspond to the temperature of the probe's measurement environment as accurately as
possible. A suitable measurement point is as close to the probe as possible, but yet far enough
so that ongoing condensation prevention warming of the probe does not have an eect on the
measured value.
At device restart, the value is cleared.
More information
‣
Configuring environment settings with Indigo80 handheld indicator (page 26)
3.6
Filtering factor
The filtering factor determines how quickly the results of measurement cycles are reflected in
values of output parameters. You can use the filtering factor to slow down the response time
of the measurement, filtering out rapid changes and measurement noise.
• Maximum value (1) = No filtering, fastest measurement. Output shows 100 % of the most
recent measured value.
• Less than maximum value = Filtering is applied and measurement response time is
reduced. For example, defining a value that is 90 % of the maximum value means that the
filtered output reading = 90 % of the most recent measured value + 10 % of the previous
reading.
Filtering factor settings can be configured with the Insight software or the Indigo80 handheld
indicator.
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DMP80 Series User GuideM212904EN-A
More information
‣
Example of configuringfiltering factor with Indigo80 handheld indicator (page 25)
The handle of DMP80 probes has a detachable end piece that protects the probe's cable
connector from mechanical stress, such as physical shocks.
To detach the end piece of the handle and expose the cable connector:
1. Hold the probe firmly in your hands.
2. Grip the end piece of the handle and twist it counterclockwise to detach it.
3. Pull out the end piece.
4. You can now attach a probe connection cable in the DMP80 probe's cable connector.
Before attaching the cable, make sure to insert the cable through the end
piece first.
5. Position the end piece against the probe and twist it clockwise to secure it into place.
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DMP80 Series User GuideM212904EN-A
The probe is delivered with a yellow cap protecting the filter. Leave the protection
cap on during storage, but remove it before taking the probe into use.
20
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Chapter 5 – Using probe with Indigo80 handheld indicator
5. Using probe with Indigo80 handheld
indicator
5.1 Indigo80 handheld indicator
Figure 4 Indigo80 handheld indicator
Vaisala Indigo80 Handheld Indicator is a portable diagnostics tool that accommodates up to
two Vaisala Indigo-compatible probes or transmitters for measuring a wide range of
parameters.
With the indicator, you can:
• See real-time measurements and device and status information
• Log measurement data
• Update probe calibration information
• Configure probe features and settings such as condensation prevention, compensation
setpoints, sensor purge, and filtering factor. The available features and settings depend on
the probe model and firmware version.
Accessing certain configuration options for your probe requires using the free
Insight PC software, downloadable at www.vaisala.com/insight.
The help tours in the indicator's user interface guide you through the key features of the
indicator. You can access the tours in the Help menu by pressing the
For more information on using the indicator, for example, editing the measurement views and
performing data logging, see Indigo80 User Guide (M212722EN).
button.
21
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1
3
2
1
1
2
3
4
5
DMP80 Series User GuideM212904EN-A
5.1.1 Indigo80 keypad
Figure 5 Indigo80 keypad
1Power on/o and main menu button
2Arrow buttons for navigating menus
and scrolling views
3Select button for selecting items in the
user interface
5.1.2 Indigo80 main menu
Pressing the button while navigating the Indigo80 menus and views opens the main menu.
Figure 6 Indigo80 main menu
1Devices menu contains, for example,
options related to sensor purge,
calibration, and environment settings
(depending on the connected device).
2Data logging menu for setting logging
interval and duration, and browsing
data files.
3Notifications menu displays
notifications related to Indigo80 and
the connected devices.
4Indigo80 menu for changing the
settings of Indigo80 (for example,
date, time, and language) and viewing
device information.
5Help menu contains a Getting started
tour showing the key features of
Indigo80, as well as instructions for
sending devices to Vaisala for
calibration and maintenance.
5.2 Connecting probes to Indigo80
• Probe connection cable
Up to two Vaisala Indigo-compatible probes or transmitters can be connected to the ports
located on the bottom of Indigo80. You can connect and disconnect devices both when the
indicator is powered on and when it is o.
22
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11
2
3
4
5
Chapter 5 – Using probe with Indigo80 handheld indicator
Vaisala recommends using cables provided by Vaisala when connecting devices to the
indicator. Cables and other accessories are available to order at store.vaisala.com.
Figure 7 Connecting probes to Indigo80
M12-5F ports on the bottom of Indigo80 for connecting compatible Vaisala devices.
1
Ports are labeled and .
2M12-5M A-coded cable connector
3M12-5F A-coded cable connector
4DMP80 probe, displayed as by Indigo80
5HMP7 probe, displayed as by Indigo80
1. If the indicator is powered and no devices are connected to it, the text Please connect a probe will be shown on the display.
23
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DMP80 Series User GuideM212904EN-A
2. Insert the probe connection cable in one of the ports on the bottom of the indicator.
• Note the orientation of the cable connector when inserting it
• Hold the connector in place while turning its locking ring clockwise –
never twist the connector body!
3. Connect the probe to the M12-5F end of the probe connection cable.
When the indicator recognizes the connected probe, it shows a notification on the display
(for example, DMP80 connected). A probe connected to the leftmost port in the indicator
is labeled
4. To change probes, simply detach the cable from the probe and connect a new probe.
on the indicator's display, while the probe in the rightmost port is labeled .
5.3
Measurement location
When taking measurements with the probe, consider the following:
• Verify the operating environment specification of the probe model.
• If the temperature of the measured environment diers greatly from ambient
temperature, preferably the entire probe shaft must be inside the measured environment.
This prevents measurement inaccuracy caused by heat conduction along the probe shaft.
• Mount the probe head horizontally to prevent any water condensing on the probe head
from running to the sensors.
Use the optional magnetic hanger accessory (Vaisala item code ASM214318SP) to
attach Indigo80 to a metallic surface when taking measurements.
24
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Chapter 5 – Using probe with Indigo80 handheld indicator
5.3.1 Configuring environmental compensations
After installation, configure the pressure compensation setting, if relevant to your probe and
its measurement environment.
For example, when you have installed the probe in a process with a pressure diering from
normal atmospheric pressure, update the correct pressure into the pressure compensation
setpoint parameter or register of the probe. This allows the probe to apply the appropriate
pressure compensation into its measurement results.
You can configure the setting with the Insight software or the Indigo80 handheld indicator.
5.4 Configuring probe features with Indigo80
handheld indicator
• Probe connection cable
You can use the Indigo80 handheld indicator to configure probe features such as
compensation setpoints, sensor purge settings, and filtering factor. The available features
depend on the probe model and firmware version.
Accessing certain configuration options for your probe requires using the free
Insight PC software, downloadable at www.vaisala.com/insight.
1. Connect the probe(s) to the indicator.
2. Open the main menu by pressing .
3. Select Devices. If you have more than one device connected to the indicator, make a
further selection between the devices.
4. Select Settings to access and change the features available for your probe.
5. Exit the menu by pressing
or return to the main menu by pressing .
5.4.1 Example of configuring filtering factor with Indigo80
handheld indicator
• Probe connection cable
The filtering factor allows averaging the output if the measuring environment produces
occasional exceptionally high or low readings.
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DMP80 Series User GuideM212904EN-A
This example shows how to configure the filtering factor as 0.9 using the Indigo80 handheld
indicator.
This means that the new measurement output is a combination of the latest measurement
(90 %) and the previous measurement (10 %).
1. Connect the probe(s) to the indicator.
2. Open the main menu by pressing .
3. Select Devices. If you have more than one device connected to the indicator, make a
further selection between the devices.
4. Select Settings > Filtering.
5. Select Filtering factor.
a. Use the arrow buttons to set the value as 0.9.
b. Select Set.
6. Select Extended filteringon/o > On to enable measurement filtering using the filtering
factor defined in the previous step.
7. Exit the menu by pressing
5.5
Configuring environment settings with
or return to the main menu by pressing .
Indigo80 handheld indicator
• Probe connection cable
For optimal measurement accuracy, you can use the Indigo80 handheld indicator to give
additional information about the connected probe’s measurement environment.
The environment settings available via Indigo80 correspond to the environmental
compensation settings of the probe. Therefore, Environment settings and
Settings > Compensation setpoints are interconnected: the configuration set in
either menu is applied to both.
1. Connect the probe(s) to the indicator.
2. Open the main menu by pressing .
3. Select Devices. If you have more than one device connected to the indicator, make a
further selection between the devices.
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Chapter 5 – Using probe with Indigo80 handheld indicator
4. Select Environment settings to access the settings for your probe.
The available environment settings depend on the probe and probe firmware version.
Pressure
Value for pressure compensation. The entered value is persistent and remains
unchanged at device restart.
Temperature
If any value is entered in this field, the device will use it as its temperature
measurement value instead of its own sensor reading. This is needed when sensor
warming is used, as it will also heat the temperature sensor of the device.
At device restart, the value is cleared.
The temperature value needs an external source, for example, another
probe that is able to provide the value constantly in real time, and the
value needs to correspond to the temperature of the measurement
environment as accurately as possible. Thus, set the temperature value
only if you have another probe connected to the indicator from which
you can read the value. Do not set the temperature value manually.
5. Select a setting from the list, for example, Pressure.
a. Select the unit, if prompted.
b. Use the arrow buttons to set the desired value, and then select OK or Set.
You can also select to read the value from another probe connected to the indicator,
provided that the probe can output the required compensation parameter. Press
highlight the Read value fromfield, and then press to select the other probe as the
source of the value.
to
For Temperature, always set the temperature value to be read from
another probe. Do not set the temperature value manually. Make sure
that both probes are in the same environment to get the most accurate
measurement values.
6. Exit the menu by pressing or return to the main menu by pressing .
More information
‣
Environmental compensation (page 16)
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DMP80 Series User GuideM212904EN-A
6. Configuration with Insight software
6.1 Vaisala Insight PC software
Vaisala Insight PC software is a configuration software for Indigo-compatible probes and other
supported devices. Insight is available for Microsoft Windowsâ operating systems (64-bit
only).
With the Insight software, you can:
• See probe information and status
• See real-time measurement data
• Record data for up to 48 hours and export in CSV format
• Configure probe features such as measurement filtering and sensor purge
• Update probe calibration information:
• Calibration date and text
• Calibration interval and expiry date
• Enable or disable calibration reminder function
Adjustment of measurement is not available in Insight software for DMP80
series probes. If adjustment is necessary, contact Vaisala.
Download Vaisala Insight software at www.vaisala.com/insight.
6.2
Connecting to Insight software
• Computer with a Microsoft Windowsâ operating system (64-bit version) and
Vaisala Insight PC software installed
• Indigo USB adapter (item code USB2) or USB connection cable (item code
242659)
CAUTION!
computer may not be able to supply enough power through its USB ports. Use
an externally powered USB hub that can supply >2 W for each port.
1. Open the Insight software on your PC.
2. Verify the operating mode of Insight from the Settings menu and change it if appropriate.
• Basic mode is suitable for most use cases
• Advanced mode provides access to additional configuration options. Use Advanced mode only when instructed to do so by product documentation or Vaisala technical
support.
28
When connecting several devices at the same time, note that your
Page 29
Chapter 6 – Configuration with Insight software
3. Connect the USB adapter to a free USB port on the PC or USB hub.
4. Connect the probe to the USB adapter.
5. Wait for the Insight software to detect the probe.
6.3 Configuration options
The complete probe configuration is accessible via the Insight software. After connecting the
probe, select
Figure 8 DMP80A in Insight software
More information
‣
Restoring factory default settings with Insight software (page 36)
> Configure device to access the configuration options in Insight software.
You can restore the probe back to its default settings using the Factory default settings > Restore settings function. Doing this will also revert the latest entered
calibration information to the information that was stored with the factory
calibration.
6.4
Diagnostics in Insight
Messages sent by the connected devices are shown automatically in Insight. Additional
diagnostic data is available on the Diagnostics page. The data available depends on the probe
model and Insight operating mode (basic or advanced). The data can be very useful when
diagnosing issues together with Vaisala support, particularly the diagnostic files.
29
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DMP80 Series User GuideM212904EN-A
Diagnostic files
If Insight is in Advanced mode, you can retrieve the following diagnostic files from the
connected probe:
• SSR/Ts histogram: Table of humidity and temperature conditions measured by the probe
• Error log: Cumulative total of the error and status events tracked by the probe
Both files contain data from since the probe was manufactured, or since the files were last
cleared. Clearing the files is not recommended unless instructed by Vaisala support. The
buttons to clear the files are located at the bottom of the Diagnostics page.
The files are in comma separated value (CSV) format. They can be opened for viewing in
spreadsheet programs such as Microsoft Excel or in text editors.
Figure 9 DMP80A diagnostics in Insight (advanced mode)
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Chapter 7 – Maintenance
7. Maintenance
7.1 Cleaning the probe
Do not attempt to clean the sensors under the filter.CAUTION!
Do not spray anything directly on the probe head, since that may deposit
impurities on the sensors.
You can clean the probe, probe handle, and cable by wiping them with a soft, lint-free cloth
moistened with water or a suitable cleaning agent, such as isopropyl alcohol. Do not wipe the
filter: wiping the filter may block its pores and/or deposit residue on the filter. If the filter is
heavily contaminated, replace it.
When cleaning, follow these precautions:
• Avoid touching the filter. If you need to touch the filter, always wear clean gloves (cotton,
rubber or similar material). Keep the filter free of any grease or oil.
• Do not scrape the probe or the probe handle, and avoid abrasive cloths when wiping the
surface.
• Do not immerse the probe or the probe handle in liquid to clean them.
• Wipe cleaning agents o the probe, probe handle, and the cable after cleaning.
7.1.1 Chemical tolerance
Avoid exposing the probe to cleaning agents for unnecessarily long periods of
time.
The following chemicals can be used to clean the probe:
• Deionized water
• Isopropyl alcohol (70 %).
More information
‣
DMP80 specifications (page 38)
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DMP80 Series User GuideM212904EN-A
7.2 Changing the probe filter
• New compatible filter
• Clean lint-free gloves
CAUTION!
the probe head carefully.
1. Put on clean gloves before touching the filter.
2. Turn the filter counter-clockwise to loosen it.
3. Remove the filter from the probe head. Be careful not to touch the sensors with the filter.
4. Install a new filter on the probe head. Tighten the filter properly.
7.3
Calibration and adjustment
Calibration means comparing the measurement output of the device to a known
reference, such as a known environment in a calibration chamber or the output of
a reference instrument. Correcting the reading of the device so that it measures
accurately is referred to as adjustment.
The probe is fully calibrated and adjusted as shipped from the factory. To maintain the
accuracy of the measurement, calibrate and adjust the probe as needed. Typical calibration
interval is one year, but depending on the application it may be necessary to check the
accuracy more frequently.
When adjustment is necessary, have Vaisala calibrate and adjust the probe.
Factory calibration leads to highest accuracy and lowest uncertainty. After factory calibration
the instrument performs as new. For up-to-date information about calibration points and
oering, visit store.vaisala.com.
Sensors are easily damaged when the filter is not in place. Handle
WARNING!
has not been exposed to dangerous contamination, and is safe to handle
without special precautions.
32
When returning a product for calibration or repair, make sure it
Page 33
If you think the device is not measuring correctly, calibration and adjustment is
not the first thing to do. Check the following first:
• Make sure nothing is interfering with the measurement: heat sources,
temperature dierences, or condensation.
• Check that there is no moisture on the probe. If the sensor has become wet,
wait for it to dry.
• Always wait for the measurement to stabilize.
More information
‣
Maintenance and calibration services (page 47)
Chapter 7 – Maintenance
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DMP80 Series User GuideM212904EN-A
8. Troubleshooting
8.1 Problem situations
Table 6 Troubleshooting table
ProblemPossible causeSolution
Measurement output seems
incorrect
Values of measurement
parameters stop changing for a
few minutes
Installation location is not
representative of actual
conditions you want to
measure
Heat conduction along probe
head and cable is interfering
with measurement accuracy
Probe is in need of adjustmentHave the probe adjusted by
Probe is performing a sensor
heating function such as sensor
purge or waiting for the sensor
to cool down
Verify the installation location
and reinstall or relocate the
probe if necessary.
Follow the installation
recommendations for cases
when temperature of measured
environment diers greatly
from ambient. See
Measurement location
(page 24).
Vaisala. See Calibration and
adjustment (page 32).
Wait for the function to
complete and measurement
parameters to be available
again.
More information
‣
Technical support (page 47)
8.2
Error messages
Probes can communicate with error messages when they are connected to Indigo80 indicator
or Insight software. The messages are categorized according to the severity of the status:
• Critical errors are fatal to the operation of the device. It may not be able to respond to
communication at all, and will not measure correctly.
• Errors prevent normal operation of the device. Depending on the problem, errors may
resolve themselves. For example, a completely wet humidity sensor may cause a humidity
measurement error.
• Warnings do not prevent normal operation but may indicate possible problems.
• Status indicates a known state of the device.
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Chapter 8 – Troubleshooting
Error messageDescriptionRecommended action
Critical errors
Firmware checksum mismatch
[49]
The installed firmware is
corrupted.
Contact Vaisala technical
support.
Device settings corrupted [50] Parameter memory is
Additional configuration
corrupted.
settings corrupted [51]
Sensor coecients corrupted
[52]
Main configuration settings
corrupted [53]
Factory default settings
corrupted [54]
Non-volatile memory read
Hardware fault.
write failure [57]
Errors
Temperature measurement
error [44]
Humidity measurement error
[45]
Humidity sensor failure [46]
Readings from sensor(s) are
missing or out of range.
Inspect probe head and
sensors visually. If the probe is
completely wet, allow it to dry
out.
If the sensors are damaged or
missing and the error
message(s) stay active, contact
Vaisala to have the probe
repaired.
Capacitance reference error
[47]
Hardware fault.Contact Vaisala technical
support.
Sensor heater error [212]
General device failure [994]High number of measurement
errors, capacitance reference
errors, or sensor heater errors
written in the error log.
Ambient temperature out of
range [48]
Probe handle is too hot or cold. Relocate the probe handle so
that its ambient temperature is
within the specified operating
range.
Supply voltage out of range
[55]
Probe supply voltage is too
high or low.
Check and correct the supply
voltage.
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DMP80 Series User GuideM212904EN-A
Warnings
Autocalibration failedMeasurement environment is
Calibration has expired [353]This warning is displayed by
Software restart [679]The probe has automatically
Unexpected device restart
[216]
Status messages
Calibration is about to expire
[352]
Purge in progress [287]Sensor purge of the humidity
The readings stay frozen until
the sensor cools down [288]
not suitable for autocalibration.
the calibration reminder
functionality if the calibration
interval has been exceeded.
restarted itself.
This message is displayed by
the calibration reminder
functionality.
sensor is ongoing.
Probe is waiting for its sensors
to cool down.
Autocalibration can only be
performed successfully in dry
and stable conditions. This
warning is expected if the
probe head is in normal room
humidity.
Occasional autocalibration
failures are not a cause for
concern as long as
autocalibration is usually
successful.
Calibrate the probe and update
the calibration date
information.
Check that supply voltage is
stable and operating
environment is within
specification.
Calibrate the probe and update
the calibration date
information.
Wait for sensor purge to
complete.
Wait for measurement readings
to become available.
More information
‣
Technical support (page 47)
8.3
Restoring factory default settings with Insight
software
If needed, you can restore the probe back to its factory default settings using the Insight
software. Doing this will also clear any user adjustment and restore the latest adjustment
performed by Vaisala.
1. Connect the probe to the Insight software.
2. Select
3. Wait for the probe to be re-detected.
36
> Factory default settings > Restore settings.
Page 37
Chapter 8 – Troubleshooting
More information
‣
Configuration options (page 29)
8.4 Restoring factory default settings with
Indigo80 handheld indicator
• Probe connection cable
If needed, you can restore the probe back to its factory default settings using the Indigo80
handheld indicator. The user adjustment of the probe and the settings or log files of the
indicator itself are not aected.
1. Connect the probe(s) to the indicator.
2. Open the main menu by pressing
3. Select Devices. If you have more than one device connected to the indicator, make a
further selection between the devices.
4. Select Factory default settings > Restore settings > OK.
5. Confirm by selecting OK.
6. Exit the menu by pressing
.
or return to the main menu by pressing .
8.5
Writing a problem report
When troubleshooting the product, write a problem report including:
• What failed (what worked / did not work)?
• Where did it fail (location and environment)?
• When did it fail (date, immediately / after a while / periodically / randomly)?
• How many failed (only one defect / other same or similar defects / several failures in one
unit)?
• What was done when the failure was noticed?
• What was connected to the product and to which connectors?
• Input power source type, voltage, and list of other items (such as lighting, heaters, and
motors) that were connected to the same power output.
• Are all parts connected and grounded properly? Take a photo to help the troubleshooting.
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DMP80 Series User GuideM212904EN-A
9. Technical data
9.1 DMP80 specifications
Table 7 DMP80A measurement performance
PropertyDescription/Value
Dew point
SensorDRYCAPâ 180S
Measurement range−40 … +60 °C (−40 … +140 °F) T
AccuracyUp to ±2 °C (±3.6 °F) T
Response time 63 % [90 %]:
From dry to wet5 s [10 s]
From wet to dry45 s [5 min]
Temperature
Measurement range0 … +60 °C (+32 … +140 °F)
Accuracy±0.2 °C (±0.36 °F) at room temperature
Temperature sensorPt100 RTD Class F0.1 IEC 60751
Mixing ratio
Measurement range (typical)0 … 150 g/kg (0 … 1050 gr/lbs)
Accuracy (typical)±12 % of reading
Absolute humidity
Measurement range
Accuracy (typical)±10 % of reading
0 … 130 g/m
3
d/f
d/f
38
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0
20
40
60
-40
-30
-20
-10
0
10
20
30
40
50
60
10
30
50
Temperature of measured gas (°C)
Dew point temperature (°C)
Accuracy
±2 °C T
d/f
Water vapor saturation line
Accuracy
±4 °C T
d/f
Figure 10 Dew point accuracy vs. measurement conditions (DMP80A)
Table 8 DMP80B measurement performance
PropertyDescription/Value
Dew point
SensorDRYCAPâ 180M
Measurement range−70 … +60 °C (−76 … +140 °F) T
AccuracyUp to ±2 °C (±3.6 °F) T
Response time 63 % [90 %]:
From dry to wet5 s [15 s]
From wet to dry45 s [8 min]
Temperature
Measurement range0 … +60 °C (+32 … +140 °F)
Accuracy±0.2 °C (±0.36 °F) at room temperature
Temperature sensorPt100 RTD Class F0.1 IEC 60751
Relative humidity
Measurement range0 … 70 %RH
Accuracy (RH <10 %RH, at +20 °C)±0.004 %RH + 20 % of reading
Concentration by volume (ppm)
Measurement range (typical)10 … 2500 ppm
Accuracy (at + 20 °C, 1 bar)1 ppm + 20 % of reading
Chapter 9 – Technical data
d/f
d/f
39
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-10
0
10
20
60
30
50
40
-40
-30
-20
-10
0
10
20
30
40
50
60
-50
-60
-70
Area not recommended for
continuous measurement
Temperature of measured gas (°C)
Dew point temperature (°C)
Water vapor saturation line
Accuracy
±2 °C T
d/f
Accuracy
±3 °C T
d/f
DMP80 Series User GuideM212904EN-A
Figure 11 Dew point accuracy vs. measurement conditions (DMP80B)
Table 9 DMP80 series operating environment
PropertyDescription/Value
Operating temperature range−10 … +60 °C (+14 … +140 °F)
Storage temperature−20 … +60 °C (−4 … +140 °F)
Operating pressure of probe head0 … 20 bar (absolute) (0 … 290 psi (absolute))
Measurement environmentFor air, nitrogen, hydrogen, argon, helium, and
oxygen
1)
Chemical toleranceTemporary exposure during cleaning:
• Deionized water
• Isopropyl alcohol (70 %)
IP rating of probe handle:
With probe connection cable connected to the
probe
IP66: Dust-tight. Protected from powerful water
jets from any direction.
Without cableIP55: Limited protection against dust. Protected
from water jets from any direction.
1)Consult Vaisala if other chemicals are present. Consider safety regulations with flammable
gases.
Table 10 DMP80 series inputs and outputs
PropertyDescription/Value
Operating voltage15 … 30 V DC
Current consumption10 mA typical, 500 mA max.
Digital outputRS-485, non-isolated
40
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Chapter 9 – Technical data
Table 11 DMP80 series output parameters
Output parameter name and unit
Absolute humidity (g/m3)
Absolute humidity at NTP (g/m3)
Relative humidity (%RH)
Relative humidity (dew/frost) (%RH)
Dew point temperature (°C)Temperature (°C)
Dew/frost point temperature (°C)Water concentration (ppmv)
Dew/frost point temperature at 1 atm (°C)Water concentration (wet basis) (vol‑%)
Dew point temperature at 1 atm (°C)Water mass fraction (ppmw)
Dew point temperature dierence (°C)Water vapor pressure (hPa)
Probe handlePolyamide (PA) and thermoplastic elastomer
(TPE)
Probe shaftStainless steel (AISI 316L)
41
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25
[0.98]
47 [1.9]
mm [in]
103 [4.1] 63 [2.5]
262 [10]
Ø 12 [0.5]
41 [1.6]
11 [0.43]
22
[0.87]
22
[0.87]
probe handle detachable
end piece
25
[0.98]
47 [1.9]
mm [in]
103 [4.1] 63 [2.5]
262 [10]
Ø 12 [0.5]
41 [1.6]
5 [0.2]
22
[0.87]
28
[1.1]
probe handle detachable
end piece
DMP80 Series User GuideM212904EN-A
PropertyDescription/Value
Filter
Porous stainless steel (AISI 316L)
1)
1)Vaisala item code: HM47280SP
9.2 Dimensions
Figure 12 Dimensions of DMP80 series probes with G1/2" thread, side and bottom view
Figure 13 Dimensions of DMP80 series probes with NPT1/2" thread, side and bottom view
9.3
Spare parts and accessories
Table 14 DMP80 series spare parts and accessories
PropertyDescription/Value
Cables
Probe connection cable (M12-M12), 1.5 m (4.11 ft)272075SP
Flat cable for probes (M12-M12), 1.0 m (3.4 ft)CBL210493SP
Accessories for ISO G1/2" thread option
Sampling cell with quick connector and leak screwDSC74
Sampling cell with female connectors, inlet G3/8", outlet G1/4"
ISO
DMT242SC
42
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Chapter 9 – Technical data
PropertyDescription/Value
Sampling cell with Swagelok connectors for 1/4" tubingDMT242SC2
Two-pressure sampling cellDSC74B
Two-pressure sampling cell with coilDSC74C
Other items
Indigo USB adapterUSB2
Sintered stainless steel filterHM47280SP
More information
‣
Sampling cell accessories for DMP80 probe models with ISO G1/2" thread (page 12)
43
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Metal waste
Plastic
Electrical and
electronic waste
1
4
6
5
7
2
3
DMP80 Series User GuideM212904EN-A
Appendix A. Recycling instructions
These recycling instructions guide you on the end-of-life treatment of this Vaisala product. As
waste regulations and infrastructure vary in each country, these instructions only indicate the
dierent components to be separated and common ways to handle them. Always follow local
requirements when disposing of the product. Vaisala encourages to use the best available
recycling practices to minimize related environmental impacts.
Vaisala is committed to meeting the requirements of the EU Waste Electrical and
Electronic Equipment (WEEE) Directive. This directive aims to minimize the
impact of electrical and electronic goods on the environment, by increasing reuse
and recycling, and reducing the amount of WEEE going to landfill. This symbol
indicates that the product should be collected separately from other waste
streams and treated appropriately.
Polyamide (PA), glass reinforcedDispose of or recycle as
Various materialsElectrical and electronic
Dispose of or recycle as
plastic according to local
waste management
practices and regulations
plastic according to local
waste management
practices and regulations
waste
45
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Page 47
Maintenance and calibration services
Vaisala oers comprehensive customer care throughout the life cycle of our
measurement instruments and systems. Our factory services are provided
worldwide with fast deliveries. For more information, see www.vaisala.com/
calibration.
• Vaisala Online Store at store.vaisala.com is available for most countries. You
can browse the oering by product model and order the right accessories,
spare parts, or maintenance and calibration services.
• To contact your local maintenance and calibration expert, see
www.vaisala.com/contactus.
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 helpdesk@vaisala.com. Provide at least the
following supporting information as applicable:
• Product name, model, and serial number
• Software/Firmware version
• 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 according to local regulations.
47
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Page 50
www.vaisala.com
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