advertisement
M211972EN-F
User Guide
Vaisala PEROXCAP
â
Hydrogen Peroxide,
Humidity and Temperature Probe
HPP272
PUBLISHED BY
Vaisala Oyj
Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland
P.O. Box 26, FI-00421 Helsinki, Finland
+358 9 8949 1
Visit our Internet pages at www.vaisala.com
.
© Vaisala 2020
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.
Table of contents
Table of contents
Understanding relative humidity and relative saturation ................... 14
Environmental compensation for pressure .................................................. 16
Connectivity to Vaisala Insight software ...................................................... 17
Additional features with Indigo 200 series transmitters ............................18
measurement ..................................................19
Setting probe in analog or digital mode ..................................................... 29
........................................................................31
concentration reading when not exposed to H
........................... 31
threshold with Insight ...................................... 33
Analog output overrange behavior .......................................................35
Analog output overrange examples ..................................................... 36
Triggering purge in analog mode ......................................................... 39
1
HPP272 User Guide
Using probe with Indigo transmitters ......................................................... 40
Indigo 200 series transmitter overview ...............................................40
Connecting to wireless configuration interface .................................. 43
Logging in to wireless configuration interface ....................................44
Sensor vitality information in Insight ...........................................................48
Field calibration and adjustment overview ......................................... 49
calibration and adjustment ..............................................50
with Insight software ........................................51
with Indigo 200 transmitter ........................... 53
measurement with Insight software ..........................55
with Indigo 200 transmitter ....................................... 56
Adjusting temperature with Insight software ......................................57
Adjusting temperature with Indigo 200 transmitter .......................... 58
Testing analog output level with Insight ..................................................... 59
Problems and their possible solutions ..........................................................61
HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 dimensions ......... 73
HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 dimensions ........74
HPP272WALLMOUNT dimensions ........................................................ 75
Appendix A: Modbus reference.................................................................. 76
Default communication settings ...................................................................76
................................................................................................76
.................................................................................................76
32-bit floating point or integer format
................................................. 77
............................................................................... 77
............................................................................................ 78
Measurement data registers .................................................................. 78
Device identification objects .................................................................. 91
Modbus communication examples ...............................................................92
M211972EN-F
2
Table of contents
3
HPP272 User Guide
List of figures
Figure 3 Operating principle of PEROXCAP measurement.................................20
Figure 4 Example behavior of H
concentration, relative saturation (RS), and relative humidity (RH) in a vaporized H
Figure 5 Example: RS behavior in different temperatures when
Figure 6 Decontaminated space with different temperatures and
O concentration evenly distributed).............. 24
Figure 7 Pins on the probe M12/5 male connector.................................................27
Figure 10 Pins on the probe M12/5 male connector................................................ 30
threshold example.......................................................................32
threshold configuration menu................................... 33
Figure 13 Maximum extensions to analog output range........................................ 36
Figure 14 Analog output overrange example with clipping and error limits.... 37
Figure 15 Analog output overrange example with clipping only.........................38
Figure 23 Setting current level for analog output test in Insight software....... 60
measurement accuracy in 3 temperature ranges as function of H
concentration (including non-linearity and repeatability; specification valid for range 10 …
).............................................................................................70
Figure 27 HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 dimensions..........73
Figure 28 HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 dimensions........ 74
Figure 29 HPP272WALLMOUNT dimensions............................................................. 75
M211972EN-F
4
List of tables
Table 10 Default Modbus serial communication settings........................................ 76
Table 13 Modbus measurement data registers (read-only)....................................78
Table 14 Modbus configuration data registers (writable).......................................80
Table 16 Error codes in register 0201 hex
(32-bit).......................................................90
Table 17 Error codes in register 0203 hex
(32-bit)......................................................90
List of tables
5
HPP272 User Guide M211972EN-F
6
Chapter 1 – About this document
1. About this document
1.1 Version information
This document provides instructions for installing, using, and maintaining Vaisala PEROXCAP
â
Hydrogen Peroxide, Humidity and Temperature Probe HPP272.
Table 1 Document versions
Document code Date
M211972ENF April 2020
M211972EN-E
M211972EN-D
October 2019
October 2019
Description
This document. Low H
2
O
2
threshold functionality (available starting from probe SW version 1.3.6) added.
Previous version. Updated the instructions for using the
ATEST output test in Insight PC software and added information on the probe SW version requirements for
ATEST. Corrected trademark information.
Updates and additions:
• Analog output test (supported by HPP270 probe SW 1.3.0
and above) in Vaisala Insight PC software added
• Added analog output accuracy and temperature dependence specifications
• Additional through-wall installation accessory dimensions
• H measurement accuracy graph updated
2
O
2
• Updated the maintenance limit for sensor vitality value when using the probe in demanding environments
• Added troubleshooting information on triggering purge
) and Insight PC with Modbus register 1283 (0502 hex software reset loop issue in SW version 1.0.2.76
• Added information on how long calibration remains valid in ambient conditions
1.2 Related manuals
Table 2 Related manuals
Document code Name
M211887EN
M211888EN
M212195EN
M212194EN
Hydrogen Peroxide, Humidity and Temperature Probe HPP270 Series Quick
Guide
Hydrogen Peroxide Probe HPP271 User Guide
HPP271MOUNTINGSET1 / HPP272MOUNTINGSET1 Installation Kit Quick Guide
HPP271MOUNTINGSET2 / HPP272MOUNTINGSET2 Installation Kit Quick Guide
7
HPP272 User Guide M211972EN-F
Document code Name
M212179EN-A
M211877EN
M211966EN
HPP272WALLMOUNT Installation Kit Quick Guide
Indigo 201 Analog Output Transmitter User Guide
Indigo 202 Digital Transmitter User 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.
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.
8
1.4 Trademarks
Vaisala â , HUMICAP â , and PEROXCAP â are registered trademarks of Vaisala Oyj.
All other product or company names that may be mentioned in this publication are trade names, trademarks, or registered trademarks of their respective owners.
Chapter 1 – About this document
1.5 Regulatory compliances
The probe is in conformity with the provisions of the following EU directives:
• RoHS Directive
• EMC Directive
Conformity is shown by compliance with the following standards:
• EN 50581: Technical documentation for the assessment of electrical and electronic products with respect to the restriction of hazardous substances.
• EN 61326-1: Electrical equipment for measurement, control, and laboratory use – EMC requirements – Immunity test requirements for equipment intended to be used in a controlled electromagnetic environment.
• EN 55032: Information technology equipment – Radio disturbance characteristics – Limits and methods of measurement.
1.6 Patent notice
This product is protected by the following patents and patent applications and their corresponding national rights:
Table 3 Applicable patents or applications
Issuing office
European Patent Office
State Intellectual Property Office of the P.R.C.
United States Patent and Trademark Office
Publication number
EP 3004868
CN 105229463A
US 20160084811
9
HPP272 User Guide
2. Product overview
M211972EN-F
2.1 Introduction to HPP272
Vaisala PEROXCAP
â
Hydrogen Peroxide, Humidity and Temperature Probe HPP270 series is designed for demanding hydrogen peroxide bio-decontamination processes. The probes are suitable for a variety of applications such as isolator, material transfer hatch, and room biodecontamination.
Hydrogen Peroxide, Humidity and Temperature Probe HPP272 provides measurement for vaporized H
2
O
2
concentration, relative saturation, relative humidity, and temperature.
The H
2
O
2
measurement is based on comparing the readings of two composite humidity sensors to determine the vapor concentration of H
2
O
2
. The probes are easy to install with a plug-in/plug-out M12/5 connection. The digital and analog output options include an RS-485 interface for Modbus communication and two current output channels (4 … 20 mA).
The probe is not intended for safety level measurement.
The probe is not intended to be used in vacuum applications.
1
CAUTION!
When there is H
2
O
2
in the probe's environment, the probe must always be powered on. When powered on, the PEROXCAP sensor is heated, which permits using the probe in condensing H
2
O measurement performance, and lengthens the probe's lifetime. When the probe is powered off, exposure to H
2
O
2 to fail within a day, and the sensor will not recover.
2
conditions, maintains
condensation can cause the PEROXCAP sensor
2 3 4 6
5
Figure 1 Probe parts
1 Yellow transport cap. Remove this cap before using the probe.
2 Filter covering the sensor. The filter is an essential part of the measurement technology: do not remove the filter.
Filters are available as spare parts.
3 PEROXCAP sensor under the filter.
4 H
2
O
2
and humidity probe.
5 5-pin M12 connector
6 Temperature probe.
10
Chapter 2 – Product overview
More information
‣
‣
Operating principle of H2O2 measurement (page 19)
‣
‣
2.2 Basic features and options
• Vaisala PEROXCAP
â
H
2
• Vaporized H
2
O
2
O
2
measurement technology with excellent long-term stability.
measurement range 0 ... 2000 ppm.
• Relative saturation (RS) measurement range 0 ... 100 %RS.
• Relative humidity (RH) measurement range 0 … 100 %RH.
• Temperature (T) measurement range +5 ... +70 °C.
• Robust design allowing the probe to be installed directly in the process environment.
When powered on, the probe withstands H
2
O
2
and H
2
O condensation. The probe also withstands nitrogen gas.
• Protective filter over the sensors designed to withstand high air flow rates and turbulence.
• Sensor heating to avoid condensation on the sensors.
• Chemical purge for optimized performance and lifetime.
• Pressure compensation for H
2
O
2
concentration (ppm), H
2
O concentration (ppm), and relative saturation (%RS) measurement.
• Digital output: RS-485 interface for Modbus communication.
• Analog output: 2 x 4 ... 20 mA.
• Easy plug-in, plug-out.
• Field calibration and adjustment with a regular humidity calibrator or with H
2
O
2
vapor.
• Can be used as a stand-alone probe or with Vaisala Indigo 200 series transmitters.
• Can be connected to Vaisala Insight software for calibration and adjustment, configuration, diagnostics, and temporary online monitoring.
More information
‣
2.3 Safety
WARNING!
Ground the product and verify installation grounding periodically to minimize shock hazard.
WARNING!
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.
11
HPP272 User Guide
CAUTION!
Do not attempt to open the probe body. There are no user serviceable parts inside the probe body.
M211972EN-F
2.4 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. However, it is possible to damage the product by delivering an electrostatic discharge when touching, removing or inserting any objects inside the equipment housing.
Avoid touching component contacts or connectors when working with the device.
2.5 Measured parameters
Table 4 Available parameters
Parameter Abbreviation
Vaporized hydrogen peroxide concentration by volume
H
2
O
2
Unit
ppm
Relative saturation
(RS) (H
2
O + H
2
O
2
)
RS
Relative humidity (RH)
(H
2
O)
RH
Temperature T
%RS
%RH
°C
Description
Parts per million value is a unit of H
2
O
2 concentration per amount of air in volume fraction in units ppmv or m
3
/m
3
.
Relative saturation is a parameter that indicates the humidity value derived from the combination of water and hydrogen peroxide vapor. Relative saturation tells how close the measured environment is from the condensation point at given H
2
O
2 concentration.
vapor
Relative humidity is a measure of water vapor only.
12
Parameter
Absolute hydrogen peroxide
Abbreviation
a (H
2
O
2
)
Absolute humidity
(H
2
O) a
Water concentration by volume
H
2
O
Unit
mg/m
3 g/m
3 ppm
H
H
2
2
O + H
O
2
2
O
2 temperature
dew point
vapor pressure
Water vapor pressure
T d
(H
2
O + H
2
O
2
P (H
P w
2
O
2
)
) °C hPa hPa
Chapter 2 – Product overview
Description
Absolute H
2
O
2 concentration is defined as the mass of
H
2
O
2
vapor in a certain volume.
Absolute humidity is defined as the mass of water vapor in a certain volume.
Parts per million value is a unit of water concentration per amount of air in volume fraction in units ppmv or m
3
/m
3
.
Dew point is the temperature to which a gas sample must be cooled to reach condensation. At this point, measured water vapor pressure equals to water vapor saturation pressure. At the presence of H O
2 2 vapor, the actual dew point is dependent on the amount of both water and H
2
O
2
vapor, and it differs from the dew point measured with a traditional humidity sensor.
Hydrogen peroxide vapor pressure is a partial pressure of a gas that is a measure of thermodynamic activity of the gas’s molecules.
Water vapor pressure is a partial pressure of a gas that is a measure of thermodynamic activity of the gas’s molecules.
13
HPP272 User Guide M211972EN-F
Parameter Abbreviation
Water vapor saturation pressure
P ws
Water vapor saturation pressure (H
2
O + H
2
O
2
)
P ws
(H
2
O + H
2
O
2
)
Unit
hPa hPa
Description
Water vapor saturation pressure tells the maximum vapor pressure of pure water at certain temperature.
At saturation vapor pressure, water is in thermodynamic equilibrium, hence its liquid and solid phases are in equilibrium.
Water vapor saturation pressure in H
2
O
2 environment tells the maximum water vapor pressure when H
2
O
2 vapor is present. This parameter is dependent on temperature and H
2
O vapor concentration.
2
The probe provides both digital and analog outputs.
• In digital output mode, the probe outputs all the measurement parameters.
• In analog output mode, the probe outputs the readings of two measurement parameters
(one parameter in each analog output channel). These measurement parameters are chosen when ordering the probe, and you can change them using Insight software and via
Modbus. The probe is also compatible with Vaisala Indigo transmitters, which provide the option of three analog output channels.
More information
‣
Understanding relative humidity and relative saturation (page 14)
‣
Measurement data registers (page 78)
‣
Configuration registers (page 80)
‣
Connectivity to Vaisala Insight software (page 17)
‣
Setting probe in analog or digital mode (page 29)
2.5.1 Understanding relative humidity and relative saturation
Water and hydrogen peroxide have a very similar molecular structure, and they both affect the humidity of the air in which they are present. HPP272 measurement makes a difference between the humidity caused by both H
2 only by water vapor:
O
2
vapor and water vapor, and the humidity caused
14
Chapter 2 – Product overview
•
Relative saturation
is a parameter that indicates the humidity of the air caused by both
H
2
O
2
vapor and water vapor. When relative saturation reaches 100 %RS, the vapor mixture starts to condense.
•
Relative humidity
is a parameter that indicates the humidity of the air caused only by water vapor.
%RS
100
%RH
100
%RS
100
%RH
100
H
2
O
2
H
2
O
H
2
O
0 0 0 0
1 2
Figure 2 Effect of H
2
O and H
2
O
2
on relative saturation (RS) and relative humidity (RH)
1 Space without H humidity.
2
O
2
vapor. When H relative humidity.
2 Same space with H
2
O
2
O
2
vapor is not present, relative saturation equals
2
vapor introduced. Relative saturation is higher than relative
During H
2
O
2
bio-decontamination processes, it is often important to monitor the possibility of condensation. For this purpose, it is not enough to know the level of relative humidity (RH), because RH only indicates the humidity caused by water vapor. The possibility of condensation is affected by the combined humidity of H
2
O why you need to monitor relative saturation (RS).
2
vapor and water vapor, which is
2.6 Probe filter
The white filter on the probe covers the PEROXCAP sensor. The filter is made of porous PTFE that allows ambient air to reach the PEROXCAP sensor while protecting the sensor in strong or turbulent air flow.
CAUTION!
The filter is an essential part of the measurement. If the filter is broken, dirty, or removed altogether, measurement does not work as intended.
• Do not touch the filter with bare hands. If you need to touch the filter, always use clean gloves (rubber, cotton or similar material).
• Keep the filter free of any grease or oil.
• Do not touch any parts under the filter. Touching parts under the filter may damage the sensors.
15
HPP272 User Guide M211972EN-F
More information
‣
Problems and their possible solutions (page 61)
2.7 Chemical purge
Chemical purge is a 4-minute process where the sensors are heated to remove possible contamination. The purge is essential for the long-term performance and accuracy of the probe in demanding H
2 not available.
O
2
environments. During the purge, H
2
O
2
and H
2
O measurements are
The purge is automatically performed:
• At probe start-up.
• After an RH for H
2
O
2
adjustment is made.
• At intervals (default 24 hours, configurable between 1 hour ... 1 week using Vaisala Insight software, Modbus, or Indigo transmitters). Purge is postponed by 30 minutes if H
2 present or ambient humidity is not steady.
O
2
is
If required, you can also enable purge during H
2 software or an Indigo transmitter.
O
2
exposure with the Insight PC
Purge is recommended at least every 24 hours of powered-on time, even if the probe has not been continuously exposed to H
2
O
2
.
Optional: if needed, you can also trigger a purge at any time with Vaisala Insight software,
Modbus (in digital mode) or pin #5 on the M12 connector (in analog mode).
More information
‣
Triggering purge in analog mode (page 39)
‣
Operation in analog mode (page 35)
2.8 Environmental compensation for pressure
When necessary, you can apply pressure compensation to improve the measurement accuracy of the probe (probe software v.1.1.0 and later). The probe does not have on-board pressure measurement, but a pressure reading from an external source can be used as a setpoint value for compensation.
You can configure the pressure compensation parameters using Vaisala Insight software,
Modbus configuration registers, or an Indigo 200 transmitter.
By default, the pressure compensation is turned off. When the compensation is off, the probe uses the default compensation value (1013.25 hPa).
Pressure compensation affects the following parameters:
16
Chapter 2 – Product overview
• H
2
• H
2
O
2
concentration (ppm)
O concentration (ppm)
• Relative saturation (%RS)
More information
‣
Vaisala Insight software (page 45)
‣
Configuration registers (page 80)
2.9 Measurement filtering factor
You can set a filtering factor that affects the speed at which the latest H
2
O
2
and RS measurements are integrated into the output of the probe. This allows averaging the output if the measuring environment produces occasional exceptionally high or low readings.
The filtering factor can be set either with Modbus configuration register 0308 hex
Insight software, or an Indigo 200 transmitter.
, Vaisala
By default, the filtering factor is set to 1.0, which means the latest measurement is shown directly in the output, without any filtering. To apply filtering, enter a lower filtering factor to include previous measurements in the calculation of measurement output. For example, changing the filtering factor to 0.9 results in an output that is a combination of the latest measurement (90%) and the previous measurement output (10%).
More information
‣
Configuration registers (page 80)
2.10 Connectivity to Vaisala Insight software
The probe can be connected to Vaisala Insight software using a Vaisala USB cable (no.
242659). With the Insight software, you can:
• Calibrate and adjust the measurement.
• See device information and status.
• See real-time measurement.
• Configure serial communication settings, purge settings, filtering factor, and analog output parameters and scaling.
More information
‣
Connecting to Insight software (page 45)
17
HPP272 User Guide M211972EN-F
2.11 Additional features with Indigo 200 series transmitters
HPP272 probes starting from serial number P3940796 require Vaisala Indigo 200 series transmitter software version 1.4.0 or above. HPP272 probes with an earlier serial number are compatible with Indigo 200 series transmitters starting from Indigo 200 series software version 1.3.2. Connecting the probe to an Indigo transmitter provides a range of additional options for outputs, measurement viewing, status monitoring, and configuration interface access.
Examples of additional features available with Indigo 200 series transmitters include:
• 3.5” TFT LCD color display or non-display model with LED indicator
• Digital output or 3 analog outputs (depending on the transmitter model)
• 2 configurable relays
• Wireless browser-based configuration interface for mobile devices and computers (IEEE
802.11 b/g/n WLAN)
The selection of available additional features (for example, output and connectivity options) varies depending on the Indigo transmitter model. For more information on Indigo transmitters, see www.vaisala.com/indigo .
More information
‣
Indigo 200 series transmitter overview (page 40)
18
Chapter 3 – H2O2 measurement
3. H
2
O
2
measurement
3.1 Operating principle of H
2
O
2
measurement
CAUTION!
When there is H
2
O
2
in the probe's environment, the probe must always be powered on. When powered on, the PEROXCAP sensor is heated, which permits using the probe in condensing H
2
O
2
conditions, maintains measurement performance, and lengthens the probe's lifetime. When the probe is powered off, exposure to H
2
O
2
condensation can cause the PEROXCAP sensor to fail within a day, and the sensor will not recover.
PEROXCAP
â
sensor technology works using measurements from two Vaisala HUMICAP
â sensors. HUMICAP sensors guarantee quality and reliability, with their reputation for repeatability, accuracy, excellent long-term stability, and negligible hysteresis – even in the most demanding high-concentration H
2
O
2
applications in atmospheric pressure.
HUMICAP sensor is a thin-film polymer sensor consisting of a substrate on which a thin polymer film is deposited between two electrodes. The film absorbs or releases vapor according to humidity changes in the environment. As the humidity changes, the dielectric properties of the polymer film change, and so does the capacitance of the sensor. The instrument’s electronics measure the capacitance of the sensor and convert it into a humidity reading.
PEROXCAP measurement uses two composite HUMICAP sensors, one with a catalytic layer and one without. The catalytic layer catalyzes H
2
O
2
from the vapor mixture. Therefore, the
HUMICAP sensor with this layer only senses water vapor, providing a measurement of partial water pressure, i.e. relative humidity (RH). The sensor without the catalytic layer senses both hydrogen peroxide vapor and water vapor in the air mixture. The difference between the readings from these two sensors indicates the vapor concentration of H
2
O
2
.
19
1
2
3
HPP272 User Guide
H
2
0
2H
2
0
2
A
2H
2
0
0
2
H
2
0
B
M211972EN-F
H
2
0
2
2
3
Figure 3 Operating principle of PEROXCAP measurement
A HUMICAP sensor with a catalytic layer (under the probe filter). This sensor only senses water vapor.
B HUMICAP sensor without a catalytic layer (under the probe filter). This sensor senses the air mixture with both hydrogen peroxide vapor and water vapor.
1 Catalytic layer over the thin film polymer. This layer catalyzes hydrogen peroxide into water and oxygen and prevents it from entering the sensing polymer.
2 Thin film polymer between two electrodes.
3 Alumina substrate.
In addition to measuring vaporized H
2
O
2
concentration, HPP272 provides measurement for relative saturation, relative humidity, and temperature. Relative humidity (RH) is a parameter that indicates the humidity value derived from water vapor only, whereas relative saturation
(RS) indicates the humidity percentage derived from water vapor and H
2
O
2
vapor together.
When relative saturation reaches 100 %RS, the vapor mixture starts to condense.
20
Chapter 3 – H2O2 measurement
3.2 Typical applications
The probe is not intended for safety level measurement.
The probe is not intended to be used in vacuum applications.
Vaporized hydrogen peroxide is used for bio-decontamination in several applications from healthcare and pharmaceutics to food and beverage industry. Vaporized hydrogen peroxide is an easy-to-use and effective bio-decontaminating agent that destroys the full spectrum of biological contaminants including micro-organisms such as bacterial spores, mycobacteria, and non-enveloped, non-lipid viruses. Bio-decontamination with vaporized hydrogen peroxide is a low-temperature, environmentally friendly process that leaves no real residues, only water vapor and oxygen. One of the benefits also is that the bio-decontamination process can be validated.
Common vaporized H
2
O
2
bio-decontamination applications include isolators, transfer hatches, closed Restricted Access Barrier Systems, and room bio-decontamination (for example, in hospital environments, cleanrooms, decontamination tents, aircrafts, ships, and shipping containers).
The bio-decontamination process typically has the following phases:
1. Optional dehumidification, where relative humidity is decreased to a desired level, for example, by warming the space.
2. Conditioning, where vaporized H
2
O decontaminated.
2
mixture is introduced into the space to be bio-
3. Decontamination, where H
2
O
2
concentration is maintained at a desired level for a certain time.
4. Aeration, where H
2
O
2
is removed from the bio-decontaminated space.
21
HPP272 User Guide
More
H
2
O
2
Concentration
Cycle Phase
Less
M211972EN-F
RELATIVE HUMIDITY (RH)
100%
CONDENSATION POINT
VAPORIZED HYDROGEN
PEROXIDE CONCENTRATION
RELATIVE
SATURATION (RS)
Humidity
0%
Figure 4 Example behavior of H
2
(RH) in a vaporized H
2
O
2
O
2
concentration, relative saturation (RS), and relative humidity
bio-decontamination cycle (non-condensing conditions)
In the non-condensing bio-decontamination cycle example shown in
:
• In the
dehumidification
phase, RH (and RS) decreases.
• When the
conditioning
phase starts, H
2
O
2
concentration rises rapidly. There is also a rapid increase in RS, which indicates the humidity caused by both H
2
Because the generated H rise.
2
O
2
O
2
vapor and water vapor.
vapor is typically mixed with water vapor, RH also starts to
• In the
decontamination
phase, H
2
O
2
concentration is steady. However, RS level rises slowly close to 100 %RS, i.e. condensation point, due to rising RH level.
• In the
aeration
phase, H
2
O
2
concentration, RS, and RH all decrease. When H concentration is zero, RS equals RH.
2
O
2
The way your bio-decontamination process is designed affects which parameters you want to measure in different phases.
Depending on your bio-decontamination process, you may also want to either create or avoid condensation during the conditioning and decontamination phases. In these phases, the air in the bio-decontaminated space always contains both water and H
2
O
2
vapor, which both affect the possibility of condensation. To monitor and control whether and when condensation forms, it is useful to know the
combined
humidity level of water vapor and H
2
O
2
vapor: relative saturation (RS). When relative saturation reaches 100 %RS, the vapor mixture starts to condense.
22
Chapter 3 – H2O2 measurement
For condensation monitoring, choosing the right measurement location is very important. If the bio-decontaminated space has surfaces with a lower temperature than where RS is measured, condensation may start to form on those surfaces even before RS reaches 100 %RS in the exact measurement location. To monitor the possibility of condensation, consider installing the probe close to a surface where you suspect condensation may form.
More information
‣
Understanding relative humidity and relative saturation (page 14)
‣
3.3 Condensation monitoring
H
2
O+H
2
O
2
vapor mixture starts to condense when relative saturation (RS) reaches 100 %RS.
RS level is strongly affected by temperature: decreasing the temperature increases RS. If there are temperature differences in the bio-decontaminated space, RS varies in different parts of that space even if the H
2
O+H
2
O
2
vapor is evenly distributed.
100
H
2
O
2
= 500 ppm
H
2
O = 8850 ppm
95
90
85
21 21.5
Temperature
22 22.5
Figure 5 Example: RS behavior in different temperatures when H
2
H
2
O concentration (8850 ppm) are constant
O
2
concentration (500 ppm) and
For condensation monitoring, this means that even if you measure < 100 %RS in one point, RS may be 100 %RS in another, cooler point. The following figure shows an example of how RS can vary in a decontaminated space according to temperature differences.
23
HPP272 User Guide M211972EN-F
2
T= 21.5 ˚C
RS= 94.5 %RS
3
T= 21 ˚C
RS= 100 %RS
1
T= 22 ˚C
RS= 89.5 %RS
Figure 6 Decontaminated space with different temperatures and RS levels (H
2 concentration evenly distributed)
O
2
and H
2
O
1 Center of the decontaminated space. The center is
warmer
than the wall and the window, and the RS level is lower.
2 Wall of the decontaminated space. Because the wall is 0.5 °C
cooler
than the center of the space, RS level is higher than in the center.
3 Window of the decontaminated space. The window is 1 °C
cooler
than the center of the space, and RS = 100 %RS. Condensation starts to form on the window surface.
Condensation forms typically on surfaces, and first on surfaces that are cooler than the surrounding air, such as:
• Walls
• Windows
• Supplies that have just been brought in the decontaminated space
To monitor the possibility of condensation by measuring RS, it is recommended to measure as close as possible to places where condensation might occur.
24
Chapter 4 – Installation
4. Installation
When you choose the installation location for the probe, consider the following:
• Choose a location that represents the environment and process you want to measure.
Some factors may make a location unrepresentative of the process:
• Heat sources
• Materials that absorb H
2
O
2
, such as several plastics, rubbers and sealing materials
• Limited air flow
• The probes withstand bio-decontamination process conditions. For signal cables, you must verify their suitability in the installation environment.
• The probes withstand high air flow rates.
• The probe is intended for use in atmospheric pressure. Do not install the probe in a vacuum.
When there is H
2
O
2
in the probe's environment, the probe must always be powered on. When powered on, the PEROXCAP sensor is heated, which permits using the probe in condensing
H
2
O
2
conditions, maintains measurement performance, and lengthens the probe's lifetime.
Accurate relative humidity (RH) and relative saturation (RS) measurement requires both humidity and temperature data from the same environment. Install the main body of the probe
(H
2
O
2
and humidity measurement) and the attached temperature probe in the same measurement environment, approximately 6 ... 10 cm apart from each other, so that the conditions are the same for both elements. Do not install the temperature probe directly above the H
2
O
2
and humidity probe, as moderate heat rising up from the H
2
O
2
and humidity probe body may affect the ambient temperature around the temperature probe.
CAUTION!
The filter is an essential part of the measurement. If the filter is broken, dirty, or removed altogether, measurement does not work as intended.
• Do not touch the filter with bare hands. If you need to touch the filter, always use clean gloves (rubber, cotton or similar material).
• Keep the filter free of any grease or oil.
• Do not touch any parts under the filter. Touching parts under the filter may damage the sensors.
25
HPP272 User Guide M211972EN-F
Example: Installation through a wall, gland option
1
Ø 40 mm
2
A through-wall installation is recommended especially in very harsh processes.
Seal the lead-throughs on the metal body of the probes.
The figure shows an example installation using Vaisala spare part glands
(HPP272MOUNTINGSET1).
1 Nut for tightening the probe in place
2 Nut for mounting the gland
40 mm
(recommended)
≤
6 mm
Ø 8 mm
Example: Installation through a wall, flange option
≤
4 mm
1
2
The figure shows an example installation using Vaisala spare part flange
(HPP272MOUNTINGSET2), including the drilling dimensions for the flange.
Seal the lead-throughs on the metal body of the probes.
1 Screws for tightening the flange in place (4 pcs, Ø 5 mm)
2 Nut for mounting the gland
40 mm
Ø 8 mm
Ø 5 mm
Ø 2
7 mm
26
Chapter 4 – Installation
Example: Installation entirely in process environment
Mount the H
2
O
2
and humidity probe from the probe body.
Mount the temperature probe from the metal body. Note that the temperature sensor is at the tip of the temperature probe.
The figure shows an example installation using Vaisala spare part wall mounting set
(HPP272WALLMOUNT).
Let the signal cable hang loosely so that it makes a bend. This prevents condensing water from running to the probe along the cable. Do not hang the probe by the signal cable.
5.5 mm
Ø 5.5 mm
68 mm
Make sure the signal cable you use is suitable for your biodecontamination process.
More information
‣
HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 dimensions (page 73)
‣
HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 dimensions (page 74)
‣
HPP272WALLMOUNT dimensions (page 75)
4.1 Wiring
4
1
3
5
2
Figure 7 Pins on the probe M12/5 male connector
27
HPP272 User Guide M211972EN-F
Pin # Function Notes Wire color
1 Power supply With digital output: 15 ... 30 VDC
With analog output: 15 ... 25 VDC
Current output: 4 … 20 mA
Brown
2
3
4
5
RS-485- or analog output 2
Power and signal GND
RS-485 common
RS-485+ or analog output 1
Output control and purge trigger in analog mode
White
Blue
Black
Floating = RS-485
Grounded = Analog outputs
If you want to be able to trigger a purge manually in the analog mode, do not connect pin #5 permanently to ground, but instead, use a relay or similar to control the pin.
Grey
1) Wire colors apply to the following cables: 254294SP, 254295SP, 254296SP, 254297SP,
244669SP
2) When using analog outputs, it is recommended to use a low supply voltage to minimize selfheating.
3) The ordered parameters and scaling are shown in the calibration certificate delivered with the probe.
HPP270 series probe
Pin #4
(Analog output 1 )
Pin #2
(Analog output 2)
PLC
IN+ Current input
IN-
IN+ Current input
IN-
Pin #5
(Output control and purge trigger in analog mode)
Relay/switch control
Pin #1
(Power supply)
+
DC power supply
Pin #3
(Power and signal
GND)
-
Figure 8 Wiring example for connecting the probe to a PLC in analog mode
28
Chapter 4 – Installation
Probe RS-485 host
Pin #4
RS-485 +
Pin #2
RS-485 -
RS-485 +
RS-485 -
RS-485 common
Pin #5
+
DC power supply
Pin #1
Power supply
Pin #3
Power GND
RS-485 common
-
Figure 9 Wiring example for RS-485 connection (Modbus communication)
More information
‣
‣
Triggering purge in analog mode (page 39)
‣
4.2 Power supply
Operating voltage range of the probe:
• With digital output: 15 ... 30 VDC
• With analog output: 15 ... 25 VDC
Maximum current consumption at 25 °C:
• With digital output: 10 mA
• With analog output: 50 mA
• During purge: 250 mA
4.3 Setting probe in analog or digital mode
The probe has two output modes: digital mode (RS-485 using Modbus) and analog mode
(current output).
Both the digital output and analog output use the same pins in the M12 male connector (pins
#2 and #4), but only one of the output modes can be active at the same time. You select which output mode is active with the output control pin #5.
29
HPP272 User Guide M211972EN-F
4
1
3
5
2
Figure 10 Pins on the probe M12/5 male connector
1. If the probe is powered on, power off the probe.
2. Select the output mode with pin #5: a. To set the probe in
analog
mode, connect pin #5 to ground.
b. To set the probe in
digital
mode, leave pin #5 floating.
3. Power on the probe. The probe checks the state of pin #5 (grounded or floating) and goes in the selected output mode.
30
Chapter 5 – Operation
5. Operation
5.1 Probe start-up
When powered on, the probe starts up within 2 seconds and the digital/analog outputs are activated. The probe performs a start-up purge, which takes approximately 4 minutes. During the purge, hydrogen peroxide, relative humidity, and relative saturation measurements are not available. If the probe is in analog mode, analog outputs are in the error state (default: 3.6 mA) during the purge.
Measurements from the outputs (digital and analog) will reach specified accuracy after a 8½minute warm-up period. For this reason, you should design your system so that it does not rely on measurements from the probe during this time.
More information
‣
Behavior at exposure to H2O2 (page 31)
5.2 Behavior at exposure to H
2
O
2
CAUTION!
When there is H
2
O
2
in the probe's environment, the probe must always be powered on. When powered on, the PEROXCAP sensor is heated, which permits using the probe in condensing H
2
O
2
conditions, maintains measurement performance, and lengthens the probe's lifetime. When the probe is powered off, exposure to H
2
O
2
condensation can cause the PEROXCAP sensor to fail within a day, and the sensor will not recover.
When the bio-decontamination process starts and the probe is exposed to H
2
H
2
O
2 time is included in the response time of the probe.
O
2
, the probe's
concentration reading changes to > 0 ppm after approximately 20 ... 30 seconds. This
5.3 H
2
O
2
concentration reading when not exposed to H
2
O
2
The PEROXCAP sensor used in HPP270 probes consists of 2 humidity sensors that have a minor difference in behavior when the humidity level changes. Because of this difference, the
H
2
O
2
concentration reading may vary slightly (typically 0 … 3 ppm) when the probe is not exposed to H
2
O
2
.
31
HPP272 User Guide M211972EN-F
If necessary, the variation in low level output can be hidden by enabling the Low H
2
O
2 threshold feature (available starting from probe SW version 1.3.6) that forces the output to 0 when the measurement falls below a set level (for example, 3 ppm), and the configured activation delay ends. The output returns to normal operation after the measurement has remained above the set deactivation level (for example, 10 ppm) for a set time. You can configure the Low H
2
O
2
threshold activation and deactivation levels and the activation and deactivation delays with Vaisala Insight PC software and Modbus registers.
H2O2 output
Measurement hidden by low H2O2 threshold feature
15
Measurement spikes are shown in the output during activation delay
After the activation delay, measurement spikes shorter than the deactivation delay are not shown in the output
Normal output resumes after measurement has remained above the deactivation level for the duration of the deactivation delay
Deactivation level at 10 ppm
10
5
Activation level
at 3 ppm
0
Activation delay
Output forced to 0 at end of activation delay
Deactivation delay
Figure 11 Low H
2
O
2
threshold example
Activation level The level below which the
Activation delay
timer starts (3 ppm in the example).
Activation delay The activation delay timer starts when the measurement falls below
Activation level
. When the delay ends, the H
2
O
2
output is forced to
0 ppm. Note that the deactivation limits apply also during the activation
Deactivation level
Deactivation delay delay.
The level above which the
Deactivation delay
timer starts (10 ppm in the example).
The deactivation delay timer starts when the measurement rises above
Deactivation level
. If the measurement remains above the deactivation level for the duration of the deactivation delay, the output returns to normal operation.
The same deactivation principle applies both before and after the Low H
2
O
2 threshold feature activates. That is, both during and after the
Activation delay
, normal measurement output is resumed if the measurement rises above the
Deactivation level
for the duration of the
Deactivation delay
.
More information
‣
Configuring low H2O2 threshold with Insight (page 33)
‣
Configuration registers (page 80)
32
Chapter 5 – Operation
5.3.1 Configuring low H
2
O
2
threshold with Insight
• HPP270 probe SW version 1.3.6 or above
• Computer with Vaisala Insight software installed
• USB connection cable (no. 242659)
You can configure the H
2
O
2
levels at which the Low H
2
O
2
threshold feature is activated and deactived, and the related delays, with Insight PC software. For an overview of the
functionality, see H 2 O 2 concentration reading when not exposed to H 2 O 2 (page 31) .
Figure 12 Insight Low H
2
O
2
threshold configuration menu
1 Enable or disable the Low H
2
2 Activation level (in ppmH
2
O
2
O
2
threshold feature (disabled by default).
).
Default: 3 ppm
. See H 2 O 2 concentration reading when not exposed to H 2 O 2 (page 31) .
3 Activation delay (seconds).
Default: 1800 seconds
(30 minutes).
4 Deactivation level (in ppmH
2
O
2
).
Default: 10 ppm
. See H 2 O 2 concentration reading when not exposed to H 2 O 2 (page 31) .
5 Deactivation delay (seconds).
Default: 10 seconds
.
1. Connect to Insight (for instructions, see Connecting to Insight software (page 45) ).
2. Select
> Configure Device > Low H₂O₂ threshold
.
33
HPP272 User Guide M211972EN-F
3. Enable the Low H
2
O
2
threshold feature by sliding the selection switch to the right.
When enabled, the Low H
2 probe reset.
O
2
threshold feature remains in use also after
4. In the
Activation level
field, define the H
2
O
2
level where the Low H
2
O
2
threshold
Activation delay
starts.
5. In the
Activation delay
field, define how long it takes for the output to be forced to zero after the H
2
O
2
measurement falls below the
Activation level
value.
6. In the
Deactivation level
field, define the H
2
Deactivation delay
starts.
O
2
level where the Low H
2
O
2
threshold
7. In the
Deactivation delay
field, define how long the H
2
O
2
measurement must remain above the
Deactivation level
before normal measurement output is resumed.
8. Take the settings into use by selecting
Save
.
Example: Low H
2
O
2
threshold feature activated at 3 ppm and deactivated at 10 ppm
1.
Activation level
is set as 3 ppm H
2 minutes).
O
2
and
Activation delay
as 1800 seconds (30
2.
Deactivation level
is set as 10 ppm H
2
O
2
and
Deactivation delay
as 10 seconds.
3. When the measurement falls below the 3 ppm
Activation level
, the
Activation delay
of
30 minutes starts. During the 30-minute Activation delay, all measurements (whether within or outside of the configured activation levels) are output normally.
4. After the 30-minute Activation delay has passed, the H
2
O
2
output is forced to 0 ppm.
5. The measurement output stays forced to 0 ppm until the actual measurement remains over the Deactivation level of 10 ppm for the set Deactivation delay of 10 seconds.
6. When the measurement has remained over 10 ppm for 10 seconds, normal output resumes.
Note that the instant change from the forced 0 ppm output to the actual measurement can cause a quick increase in the measurement output reading.
5.4 Modbus
The probe can be accessed using the Modbus serial communication protocol. The supported
Modbus variant is Modbus RTU (Serial Modbus) over RS-485 interface.
34
Chapter 5 – Operation
More information
‣
‣
Setting probe in analog or digital mode (page 29)
‣
5.5 Operation in analog mode
In analog output mode, the probe outputs the readings of two measurement parameters (one parameter in each analog output channel). These measurement parameters are chosen when ordering the probe, and you can change them using Insight software and via Modbus. You can check the chosen parameters in the calibration certificate delivered with the probe.
The default output range for both channels is 4 ... 20 mA.
When using analog outputs, it is recommended to use a low supply voltage to minimize selfheating and maximize measurement performance. The operating voltage range with analog output is 15 ... 25 V.
When the probe performs the chemical purge, the analog outputs have a defined behavior:
• During
start-up purge
, analog output is in the error state (default: 3.6 mA).
• During
interval purge
and
manually triggered purge
, output is frozen to show the last measured value before the purge began.
More information
‣
Setting probe in analog or digital mode (page 29)
‣
Analog output error state (page 67)
‣
Configuration registers (page 80)
‣
5.5.1 Analog output overrange behavior
The analog output of the probe has a defined behavior when the values measured by the probe are outside the scaled analog output range. At first, the output is clipped when the measurement exceeds a set limit (clipping limit): the measurement continues, but the output does not change from the clipped value.
When the measurement exceeds the second limit (error limit), the analog output switches to the error state defined for the output.
The clipping and error limits are configured separately for the low and the high ends of the measurement scale. By default, the clipping limits are set to 0 %, and the error limits are set to
2 % of the scale.
35
HPP272 User Guide M211972EN-F
You can change or disable the clipping and error limits using Vaisala Insight software or
Modbus configuration registers. Changing the limits does not affect the scaling of the outputs.
The definable range for each limit is 0 ... 20 %. The maximum values for limits extend the analog output range to 0.8 mA at the low end of the scale, and to 23.2 mA at the high end of the scale.
Max. extension at low end
0.8 mA
(= 20 %)
4 mA
Regular range
Max. extension at high end
20 mA
Figure 13 Maximum extensions to analog output range
23.2 mA
(= 20 %)
The same clipping and error limits are applied when the measured value drops back to the scaled range: at first the output returns to the clipped value from the error state, and then to normal output.
More information
‣
Analog output error state (page 67)
5.5.2 Analog output overrange examples
Consider a probe with one of the analog output channels (4 ... 20 mA) configured to output
H
2
O
2
concentration, scaled to 0 ... 2000 ppm.
Example: Clip the high end of the output at 2100 ppm, and enter the error state at 2200 ppm
Configure the high-end clipping limit and error limit as follows:
• Clipping limit, high end: 5 % of scale (= 2100 ppm, clipped at 20.8 mA)
• Error limit, high end: 10 % of scale (= 2200 ppm)
When the measured H
2
O
2
concentration rises above 2000 ppm, the output rises above 20 mA.
The output keeps rising until the measurement is 2100 ppm, at which point the probe outputs
20.8 mA. If the H
2
If the H
2
3.6 mA).
O
2
O
2
concentration rises above 2100 ppm, the output still remains at 20.8 mA.
concentration rises above 2200 ppm, the output enters the error state (by default,
36
Chapter 5 – Operation
Output signal, mA
20.8
20
Clipping limit
High end of scale
4
3.6
Error level
0
2000 2100 2200
Measured H2O2 concentration, ppm
Analog signal
Figure 14 Analog output overrange example with clipping and error limits
Example: Clip the high end of the output at 2100 ppm, but do not enter the error state at all
Configure the high-end clipping limit and error limit as follows:
• Clipping limit, high end: 5 % of scale (= 2100 ppm, clipped at 20.8 mA)
• Error limit, high end: empty (or in Modbus: "NaN")
When the measured H
2
O
2
concentration rises above 2000 ppm, the output rises above 20 mA.
The output keeps rising until the measurement is 2100 ppm, at which point the probe outputs
20.8 mA. If the H
2
O
2
concentration rises above 2100 ppm, the output still remains at 20.8 mA.
37
HPP272 User Guide
Output signal, mA
20.8
20
Clipping limit
High end of scale
M211972EN-F
4
3.6
0
2000 2100
Measured H2O2 concentration, ppm
Analog signal
Figure 15 Analog output overrange example with clipping only
Example: Do not clip the output at all, but enter the error state at 2200 ppm
Configure the high-end clipping limit and error limit as follows:
• Clipping limit, high end: empty (or in Modbus: "NaN")
• Error limit, high end: 10 % of scale (= 2200 ppm, 21.6 mA)
When the measured H
2
O
2
concentration rises above 2000 ppm, the output rises above 20 mA.
The output keeps rising until the measurement exceeds 2200 ppm (21.6 mA), at which point the output enters the error state (by default, 3.6 mA).
38
Chapter 5 – Operation
Output signal, mA
21.6
20
Error limit
High end of scale
4
3.6
Error level
0
2000 2200
Measured H2O2 concentration, ppm
Analog signal
Figure 16 Analog output overrange example with no clipping, only error state when error limit is exceeded
5.5.3 Triggering purge in analog mode
In the analog mode, pin #5 in the probe's M12 male connector is connected to ground.
Additionally, pin #5 is used to trigger a purge in analog mode. To be able to trigger a purge, do not connect pin #5 to ground permanently, but instead, use a relay or similar to control the pin.
For a wiring example, see
.
1. To trigger the purge, disconnect pin #5 from ground for a minimum of 50 ms, and then reconnect the pin to ground.
Do not leave pin #5 floating for a long time. If the probe is reset while pin #5 is floating, the probe will go into digital mode instead of analog mode.
The probe starts performing the purge. The duration of the purge is approximately 4 minutes.
During the purge, hydrogen peroxide, relative saturation, and relative humidity measurements are not available.
More information
‣
39
HPP272 User Guide
5.6 Using probe with Indigo transmitters
5.6.1 Indigo 200 series transmitter overview
M211972EN-F
1
2
3
1 3.5” TFT LCD color display: non-display option with LED available for certain models.
2 Cable locking wheel: insert cable, hold in place, and turn the wheel counterclockwise.
3 Wireless configuration interface (WLAN) activation button.
4 Rubber lead-through with strain relief. Cable feedthrough option also at back of transmitter.
5 Input/output cable.
The probe can be connected to Vaisala Indigo transmitters by using a cable.
40
4
5
Chapter 5 – Operation
Indigo transmitters are host devices that extend the feature set of connected probes with a range of additional options for outputs, configuration access, measurement viewing, and status monitoring.
The selection of available additional features (for example, output and connectivity options) varies depending on the Indigo transmitter model. Depending on the model, a display is available as an optional selection or as a standard feature. In the non-display model, an LED indicator is used for notifications.
5.6.1.1 Wireless configuration interface overview
The wireless configuration interface has two user levels:
• All users have view-only access (no configuration rights, not password protected).
• Personnel that carry out configuration tasks can log in with an administrative password that allows changing the transmitter and probe settings.
To use the wireless configuration interface to modify the settings of your Indigo transmitter and the connected probe, you must first enable the transmitter's wireless connection and then connect to Indigo with your mobile device or computer. Most major browsers (for example,
Firefox, Chrome, Safari, and Internet Explorer) are supported: using the most recent version is recommended.
41
HPP272 User Guide
5.6.2 Attaching probes
M211972EN-F
Figure 17 Attaching probes to Indigo
1. Connect the cable to the probe.
2. Insert the other end of the cable in Indigo's cable connector and lock it in place by turning the locking wheel counterclockwise. Do not turn the cable connector when attaching the cable, only the locking wheel on the transmitter.
3. When Indigo recognizes the connected probe, it shows a notification message on the display.
42
Chapter 5 – Operation
5.6.3 Connecting to wireless configuration interface
1 2
435 ppm
H2O2
Indigo 201
74.2
%RS
RS (H2O+H2O2)
32.4
°C
T
WLAN is activated
3
Select WLAN to connect to:
1. WLAN XYZ
2. Indigo_ID[xx]
3. WLAN ABC
Figure 18 Enabling and accessing wireless configuration interface of Indigo 200
1 Wireless connection activation button
2 Wireless connection indicator (WLAN symbol) on the Indigo display
3 Choose Indigo (
Indigo_ID[xx]
) from your wireless device's list of available connections
To connect to the wireless configuration interface:
1. Press the wireless connection activation button on the bottom of the transmitter.
2. When the wireless configuration interface becomes available, the Indigo display shows a connection notification. In the Indigo models with an LED indicator, the LED blinks green when the connection is active.
3. Open the wireless connection menu in your mobile device or computer and select
Indigo_ID[xx]
(transmitter-specific SSID) from the list of available connections.
4. Depending on your device, the wireless configuration interface either launches automatically in your browser after you connect to Indigo, or you may need to start your browser application manually.
5. When you open the Indigo interface in your browser, you are prompted to log in.
Only one device can be connected to the wireless configuration interface at a time.
43
HPP272 User Guide
5.6.4 Logging in to wireless configuration interface
M211972EN-F
Figure 19 Indigo login view
When you open Indigo's wireless configuration interface in your browser, you are prompted to log in. There are 2 available user levels:
•
User
: view-only access available for all users. Does not require a password.
•
Admin
: password-protected access. To change settings, you must log in as admin.
To log in:
1. Enter the user name and password: a. To log in as user (view-only access, no configuration rights), select
User
from the
User name
dropdown. Leave the
Password
field empty.
b. To log in as admin (required for configuration), select
Admin
in the
User name
dropdown and type the admin password (default:
12345
) in the
Password
field.
2. Select
Log in
after entering the login credentials. The wireless configuration interface opens in the
Measurements
view.
The user level (
User
or
Admin
) is shown in the upper right corner of all menu views.
Select the user/admin icon in the upper right corner to change the user level.
44
Chapter 6 – Vaisala Insight software
6. Vaisala Insight software
Vaisala Insight software is a configuration software for Indigo-compatible probes. The supported operating systems are Windows 7 (64-bit), Windows 8.1 (64-bit), and Windows 10
(64-bit).
With the Insight software, you can:
• See device information and status.
• See real-time measurement.
• Configure serial communication settings, purge settings, filtering factor, and analog output parameters and scaling.
• Calibrate and adjust the device.
Download Vaisala Insight software at www.vaisala.com/insight .
The probe can be connected to Vaisala Insight software using a Vaisala USB cable (no.
242659).
6.1 Connecting to Insight software
• Computer with Vaisala Insight software installed
• USB connection cable (no. 242659)
CAUTION!
When connecting several devices at the same time, note that your 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.
Figure 20 Connecting probe to Insight
1. Open the Insight software.
2. Connect the USB cable to a free USB port on the PC.
3. Connect the probe to the USB cable.
45
HPP272 User Guide
4. Wait for Insight software to detect the probe.
M211972EN-F
46
Chapter 7 – Maintenance
7. Maintenance
7.1 Cleaning the probe
CAUTION!
Do not remove the filter.
CAUTION!
Do not attempt to clean the sensors under the filter in any way.
Avoid exposing the probe to cleaning agents for unnecessarily long periods of time.
You can clean the
H
2
O
2
and humidity probe body and temperature probe body and cable
by wiping them with a soft, lint-free cloth moistened with water or mild cleaning agent, such as isopropanol. 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 body.
• Do not immerse the probe in liquid to clean it.
• Wipe cleaning agents off the probe after cleaning.
If needed, you can spray the probe surfaces with water.
After cleaning the probe, it is recommended to perform a chemical purge.
7.1.1 Chemical tolerance
Avoid exposing the probe to chemicals for unnecessarily long periods of time. Do not immerse the probe in a chemical, and wipe chemicals off the probe after exposure.
You can use mild cleaning agents, such as isopropanol, to wipe the probe body. Avoid exposing the filter to chemicals.
The probe does not withstand DMSO (dimethyl sulfoxide C
2
H
6
OS).
After exposing the probe to chemicals, it is recommended to perform a chemical purge.
47
HPP272 User Guide M211972EN-F
More information
‣
‣
Triggering purge in analog mode (page 39)
7.2 Sensor vitality information in Insight
Due to the stresses of the H
2
O
2
measurement environment, the PEROXCAP sensor will lose its functionality over time. In less demanding conditions, the sensor can remain functional for a considerable number of years. In environments with higher H
2
O
2
concentrations and longer exposure periods, it is recommended to monitor the condition of the sensor regularly.
The status of the sensor can be reviewed from the
Diagnostics Data
view in Vaisala Insight PC software (
Devices > [probe name] > Diagnostics
). In the
Diagnostics Data
view, the condition of the sensor is shown as a percentage (0 … 100 %) on the
Sensor vitality
row.
A new sensor will have a sensor vitality of 100 %, and a sensor at the end of its life cycle will have a sensor vitality of 0 %. If you are using the probe in a demanding environment, contact
Vaisala to arrange sensor maintenance or replacement once the sensor vitality value reaches
40 %.
More information
‣
Vaisala Insight software (page 45)
7.3 Calibration and adjustment
You can have your probe calibrated and adjusted at Vaisala world-class facilities, or perform a field calibration yourself using a suitable reference environment.
For information on Vaisala calibration services, visit www.vaisala.com
.
You can adjust the probe using one of the following options:
• Vaisala Insight PC software (with PC and Vaisala USB cable, see www.vaisala.com/insight )
• Indigo transmitters
WARNING!
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.
48
Chapter 7 – Maintenance
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 differences, 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.
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
.
Calibration validity during storage
When the probe is stored indoors in ambient conditions (not in contact with the H
2
O
2 environment or other chemicals), a calibration made to the probe will remain valid for several years. For optimal storage conditions, keep the yellow protective cap on the probe filter.
7.3.1 Field calibration and adjustment overview
HPP272 has the following field calibration and adjustment options:
• H
2
O
2
measurement calibration and adjustment with relative humidity (RH) references (for example, Vaisala HMK15 Humidity Calibrator)
• H
2
O
2
measurement calibration and adjustment in H
2
O
2
vapor
• Temperature measurement calibration and adjustment using 1 or 2 references
The accuracy of field calibration and adjustment, with either RH references or in
H
2
O
2
vapor, is dependent on a number of factors such as sufficient stabilization time, reference quality, and whether the reference instrument and the instrument under adjustment are successfully placed in matching conditions.
To ensure fully accurate calibration and adjustment results, use the traceable calibration and adjustment services provided by Vaisala.
RH for H
2
O
2
adjustment
The PEROXCAP sensor comprises 2 HUMICAP humidity sensors that are used to calculate the
H
2
O
2
measurement. Because the H
2
O
2
measurement is based on humidity calculations, you can use humidity references to adjust the underlying humidity measurement. Improving the accuracy of the underlying humidity measurement also improves the accuracy of the derived
H
2
O
2
measurement.
49
HPP272 User Guide M211972EN-F
H
2
O
2
adjustment in H
2
O
2
Vapor
You can also calibrate and adjust the probe directly in H
2
H
2
O
2
O
2
vapor. Note that calibration in
vapor is a highly advanced procedure that can be performed reliably only by using another, recently factory calibrated Vaisala HPP270 series probe as a reference instrument and successfully creating matching measurement conditions for both the reference probe and the probe that is being adjusted.
Temperature adjustment
Temperature calibration and adjustment for the probe is a simple 1- or 2-point adjustment.
7.3.2 RH for H
2
O
2
calibration and adjustment
PEROXCAP sensor technology works using measurements from two HUMICAP humidity sensors: one sensor with a catalytic layer and one without a catalytic layer. The catalytic layer catalyzes hydrogen peroxide from the vapor mixture, preventing it from entering the sensor.
H
2
O
2
ppm,
RS, RH
Vaisala algorithm
Sensor with catalytic layer:
H
2
O
Sensor without catalytic layer:
H
2
0, H
2
O
2
Figure 21 PEROXCAP operating principle
Because the PEROXCAP sensor consists of humidity sensors, you can calibrate and adjust the probe's H
2
O
2
and humidity measurements with relative humidity. Vaisala algorithm transforms the observations from the humidity sensors into measurement readings: H
2
O
2
concentration, relative humidity (RH), and relative saturation (RS). Any drift in the humidity sensors shows as drift in the measurement readings. Therefore, removing the drift from the humidity sensors with calibration and adjustment improves H
2
O
2
measurement performance.
50
Chapter 7 – Maintenance
Sensor without ca
Sensor with ca
0 + accuracy for field adjustment
Adjustment removes drift from sensors.
Figure 22 Adjustment removes drift
0 + accuracy for field adjustment
Drift is also removed from measurement.
To be able to calibrate and adjust relative humidity, which is a temperature-dependent parameter, the PEROXCAP sensor also contains two internal temperature sensors (one for each humidity sensor) that are used for calibrating and adjusting RH for H
2
O
2
and in certain measurement calculations. In normal measurement, the PEROXCAP sensor is heated to allow it to be used in condensing H
2
O
2
conditions, which sets limitations for the use of the internal temperature sensors. For this reason, HPP272 uses an external temperature sensor for temperature-dependent RH and RS measurements. During RH for H
2
O
2
calibration, however, the probe switches into a calibration mode that temporarily turns off the sensor heating.
CAUTION!
Do not expose the probe to H
2
O
2
vapor when the probe is in calibration mode and sensor heating is off. Exposure to H
2
O
2
condensation can cause the PEROXCAP sensor to fail within a day, and the sensor will not recover.
Calibrating and adjusting relative humidity also calibrates and adjusts H
2
(H
2
O
2
concentration and relative saturation).
O
2
measurement
RH calibration and adjustment for H
2
O
2
is a two-point adjustment. The two reference points must be at least 40 %RH apart from each other, and the second reference point must be at least 50 %RH. The following RH levels are recommended for optimal results:
• Reference point 1: 0 ... 35 %RH
• Reference point 2: 65 ... 85 %RH
The recommended calibration and adjustment temperature is 20 ... 30 °C.
7.3.3 Adjusting RH for H
2
O
2
with Insight software
• Computer with Windows operating system and Vaisala Insight software installed
• Vaisala USB cable 242659 for connecting the probe
• A humidity calibrator to create two different humidity levels, for example,
Vaisala HMK15 Humidity Calibrator. Note that the humidity difference between the dry point and wet point must be at least 40 %RH.
51
HPP272 User Guide M211972EN-F
CAUTION!
Do not expose the probe to H
2
O
2
vapor when the probe is in calibration mode and sensor heating is off. Exposure to H
2
O
2
condensation can cause the PEROXCAP sensor to fail within a day, and the sensor will not recover.
Because the stabilization of humidity takes time, you should expect the adjustment procedure to take at least 30 minutes for each adjustment point.
In order to make a successful adjustment, the humidity of the second calibration point (wet point) must be at least 40 %RH higher than the humidity of the first calibration point (dry point). For example, if point 1 is 10 %RH, the second calibration point must be at least 50 %RH.
1. Prepare the RH calibrator equipment for RH calibration point 1 (dry point, recommendation 0 … 35 %RH).
2. Connect the probe to Insight. See Connecting to Insight software (page 45) .
3. Wait for the start-up purge to finish.
4. Select
> Calibrate > Yes
to switch the probe to calibration mode.
In calibration mode, the device will not use functions that may interfere with calibration and adjustment.
5. In the
General
tab, make sure the calibration mode
RH and T
is selected.
6. Open the tab
RH for H₂O₂ adjustment
.
7. Insert the probe head in the reference environment for calibration point 1.
8. Wait for the RH and temperature measurements to stabilize fully. This may take more than
30 minutes. Monitor the readings to see when the measurement has stabilized.
9. Click the
Reference value, point 1
text box and enter the reference value of the calibration point. Press
ENTER
or click outside the text box when done.
The probe automatically enters the measured value for the calibration point.
10. Repeat steps
for calibration point 2 (wet point, recommendation
65 … 85 %RH).
11. Check the measurement errors of RH, RS and H
2
O
2
concentration.
12. Select
Activate adjustment > Yes
to store the adjustment in the probe.
13. Check the message that appears at the top of the screen. If the message indicates that the adjustment is activated successfully, your adjustment is stored in the probe.
14. Select the
Calibration information
tab and update the
Calibration date
and
Calibration text
.
15. Select
Close > Yes
to exit the calibration mode.
52
Chapter 7 – Maintenance
7.3.4 Adjusting RH for H
2
O
2
with Indigo 200 transmitter
• Indigo 200 transmitter and connection cable
• A humidity calibrator to create two different humidity levels, for example,
Vaisala HMK15 Humidity Calibrator. Note that the humidity difference between the dry point and wet point must be at least 40 %RH.
CAUTION!
Do not expose the probe to H
2
O
2
vapor when the probe is in calibration mode and sensor heating is off. Exposure to H
2
O
2
condensation can cause the PEROXCAP sensor to fail within a day, and the sensor will not recover.
In order to make a successful adjustment, the humidity of the second calibration point (wet point) must be at least 40 %RH higher than the humidity of the first calibration point (dry point). For example, if point 1 is 10 %RH, the second calibration point must be at least 50 %RH.
Because the stabilization of humidity takes time, you should expect the adjustment procedure to take at least 30 minutes for each adjustment point.
1. Prepare the RH calibrator equipment for RH calibration point 1 (dry point, recommendation 0 … 35 %RH).
2. Connect the probe to the Indigo transmitter (see Attaching probes (page 42) ).
3. Perform a chemical purge, or wait for the start-up purge to finish.
4. Start the calibration mode with the
Start calibration
button.
5. Select
RH and T
from the
Calibration mode
dropdown.
53
HPP272 User Guide M211972EN-F
6. Remove any possible previous adjustments by selecting
Restore factory adjustment
.
7. Insert the probe head in the first reference environment.
8. Wait for the RH and temperature measurements to stabilize fully. This may take more than
30 minutes. Monitor the readings to see when the measurement has stabilized.
9. Enter the value of the first reference into the
Reference value, point 1
field.
The probe automatically enters the measured values for the calibration point.
10. Repeat steps
for calibration point 2 (wet point, recommendation
65 … 85 %RH).
11. Check the measurement errors of RH, RS and H
2
O
2
concentration.
12. Select
Activate adjustment
to store the adjustment in the probe.
13. Close the calibration mode with the
Stop calibration
button.
54
Chapter 7 – Maintenance
7.3.5 Adjusting H
2
O
2
measurement with Insight software
You need the following for the adjustment:
• A reference probe. Vaisala recommends using a Vaisala HPP270 series probe that has recently been factory-calibrated.
• An H
2
O
2
vapor chamber that can produce a stable H
2
O
2
vapor concentration level and where you can install your probe and the reference probe at the same time in such a location that their readings are comparable.
• Computer with Windows operating system and Vaisala Insight software installed (Insight software is available for download at http:// www.vaisala.com
).
• Vaisala USB cable 242659 for connecting the probes.
1. Install your probe and the Vaisala HPP270 series probe used as reference in the calibration environment. Make sure their installation location is such that the probes' readings are comparable, that is, the environment is identical for both probes.
2. Connect your probe and the reference probe to Insight.
3. Wait for the start-up purge to finish.
4. For your probe only, select
> Calibrate > Yes
to switch the probe to calibration mode.
Leave the reference probe in the normal measurement mode (default start-up mode).
5. In the
General
tab, in the
Calibration Mode
drop-down list, select
H₂O₂
.
CAUTION!
It is very important to select
H₂O₂
as the calibration mode. If you leave the probe in the
RH and T
calibration mode (default mode), the sensor heating is switched off and the sensor will not withstand exposure to H
2
O
2
vapor.
6. Open the
H₂O₂ adjustment
tab.
7. Expose your probe and the reference probe to H
2
O
2
vapor and wait for the ambient H
2 concentration to reach the desired calibration and adjustment level.
O
2
8. Wait for the measurement to stabilize fully. This may take more than 30 minutes. Monitor the H
2
O
2
concentration readings of both probes to see when the measurement has stabilized.
9. When the measurement has stabilized, check the H
2
O
2
concentration reading of the reference instrument. If you cannot see the reference instrument reading behind the calibration window, close the calibration window but do not exit the calibration mode.
10. Click the
Reference value, point 1
text box and enter the reading from the reference probe. Press
ENTER
or click outside the text box when done.
The probe automatically enters the measured value for the calibration point.
55
HPP272 User Guide M211972EN-F
11. Check the difference between the H
2
O
2
concentration readings of your probe and the reference probe. A very large difference may be due to insufficient stabilization time or unsuitable calibration setup.
12. Select
Activate adjustment > Yes
to store the adjustment in the probe.
13. Check the message that appears at the top of the screen. If the message indicates that the adjustment is activated successfully, your adjustment is stored in the probe.
14. Select the
Calibration information
tab and update the
Calibration date
and
Calibration text
.
15. Select
Close > Yes
to exit the calibration mode.
7.3.6 Adjusting H
2
O
2
with Indigo 200 transmitter
• Indigo 200 transmitter and connection cable
• A reference probe and a display device for viewing the reference measurement. Vaisala recommends using a Vaisala HPP270 series probe that has recently been factory-calibrated.
• An H
2
O
2
vapor chamber that can produce a stable H
2
O
2
vapor concentration level and where you can install your probe and the reference probe at the same time in such a location that their readings are comparable.
1. Install your probe and the reference probe in the calibration environment. Make sure their installation location is such that the probes' readings are comparable, that is, the environment is identical for both probes.
2. Connect the probe you are adjusting to the Indigo transmitter (see
).
3. Perform a chemical purge, or wait for the start-up purge to finish.
4. Open the calibration menu and start the calibration with the
Start calibration
button.
5. Select
H2O2
from the
Calibration mode
dropdown.
CAUTION!
It is very important to select
H2O2
as the calibration mode. If you leave the probe in the
RH and T
calibration mode (default mode), the sensor heating is switched off and the sensor will not withstand exposure to H
2
O
2
vapor.
56
Chapter 7 – Maintenance
6. Remove any possible previous adjustments by selecting
Restore factory adjustment
.
7. Wait until the ambient H
2
O
2
concentration has reached the desired calibration and adjustment level. Monitor the H to stabilize fully.
2
O
2
readings of both probes and allow the measurements
8. When the measurements have stabilized, check the H
2
O
2
concentration reading of the reference instrument. Enter the value of the reference into the
Reference value, point 1
field.
The probe automatically enters the measured value for the calibration point.
9. Select
Activate adjustment
to store the adjustment in the probe.
10. Close the calibration mode with the
Stop calibration
button.
7.3.7 Adjusting temperature with Insight software
• Computer with Windows operating system and Vaisala Insight software installed
• Vaisala USB cable 242659 for connecting the probe
• One or two known and stable temperature references
CAUTION!
Do not expose the probe to H
2
O
2
vapor when the probe is in calibration mode and sensor heating is off. Exposure to H
2
O
2
condensation can cause the PEROXCAP sensor to fail within a day, and the sensor will not recover.
1. Make sure you have completed the RH for H
2
O
2
calibration and adjustment.
2. Prepare the temperature calibrator equipment for temperature calibration point 1.
3. Connect the probe to Insight. See
Connecting to Insight software (page 45)
.
4. Wait for the start-up purge to finish.
5. Select
> Calibrate > Yes
to switch the probe to calibration mode.
In calibration mode, the device will not use functions that may interfere with calibration and adjustment.
6. Open the tab
Temperature adjustment
.
57
HPP272 User Guide M211972EN-F
7. Insert the probe head in the reference environment for calibration point 1.
8. Wait for the measurement to stabilize fully. This may take more than 30 minutes. Monitor the readings to see when the measurement has stabilized.
9. Enter the value of the first reference into the
Reference value, point 1
field.
The probe automatically enters the measured values for the calibration point.
10. If you want to perform a two-point calibration and adjustment, repeat steps
…
step 9 for calibration point 2.
11. Check the difference between each reference and measured value. Very large differences may be due to insufficient stabilization time or unsuitable calibration setup.
12. Select
Activate adjustment > Yes
to store the adjustment in the probe.
13. Check the message that appears at the top of the screen. If the message indicates that the adjustment is activated successfully, your adjustment is stored in the probe.
14. Select the
Calibration information
tab and update the
Calibration date
and
Calibration text
.
15. Select
Close > Yes
to exit the calibration mode.
7.3.8 Adjusting temperature with Indigo 200 transmitter
• Indigo 200 transmitter and connection cable
• One or two known and stable temperature references
CAUTION!
Do not expose the probe to H
2
O
2
vapor when the probe is in calibration mode and sensor heating is off. Exposure to H
2
O
2
condensation can cause the PEROXCAP sensor to fail within a day, and the sensor will not recover.
1. Make sure you have completed the RH for H
2
O
2
calibration and adjustment.
2. Prepare the temperature calibrator equipment for temperature calibration point 1.
3. Connect the probe to the Indigo transmitter (see
).
4. Perform a chemical purge, or wait for the start-up purge to finish.
5. Start the calibration mode with the
Start calibration
button.
58
Chapter 7 – Maintenance
6. Remove any possible previous adjustments by selecting
Restore factory adjustment
.
7. Insert the probe head in the first reference environment.
8. Wait for the measurement to stabilize fully. This may take more than 30 minutes. Monitor the readings to see when the measurement has stabilized.
9. Enter the value of the first reference into the
Reference value, point 1
field.
The probe automatically enters the measured values for the calibration point.
10. If you want to perform a two-point calibration and adjustment, repeat steps
for calibration point 2.
11. Check the difference between each reference and measured value. Very large differences may be due to insufficient stabilization time or unsuitable calibration setup.
12. Select
Activate adjustment
to store the adjustment in the probe.
13. Close the calibration mode with the
Stop calibration
button.
7.4 Testing analog output level with Insight
• HPP270 probe SW version 1.3.0 or above
• Computer with Windows operating system and Vaisala Insight PC software installed
• Vaisala USB cable 242659 for connecting the probe to Vaisala Insight PC software
• Device for powering the probe and viewing the analog output test current
(range: 0.000 … 25.000 mA) sent by the probe
To test that the analog output of the probe is accurate, you can set the probe to output a fixed level of current (range: 0.000 … 25.000 mA) and view the reading to verify the output.
59
HPP272 User Guide M211972EN-F
Figure 23 Setting current level for analog output test in Insight software
1. Connect the probe to Insight. See Connecting to Insight software (page 45) .
2. Wait for the start-up purge to finish.
3. Select
> Configure Device
and then select which output you want to test (either
Analog output 1
or
Analog output 2
).
4. From the
Output parameter
dropdown, select
ATEST
.
5. Enter the current level that you want the probe to output in the
Test output level
field.
6. Take the settings into use by selecting
Save
.
7. Disconnect the probe from the Insight USB cable and connect the probe to the device you are using to read the analog output test value.
8. Read the analog output from the probe in your device and verify that the probe output is correct.
9. After verifying the output, reconnect the probe to the Insight USB cable.
10. Go back to the Insight analog output configuration options in the
> Configure Device
menu, and change the
Output parameter
selection back to normal output operation.
Repeat the configuration for each output as necessary and
Save
the selections.
• ATEST is supported by HPP270 probe SW 1.3.0 and above.
• Insight SW version 1.0.2.76 does not support the ATEST output test
functionality. See the related section in Problems and their possible solutions
60
Chapter 8 – Troubleshooting
8. Troubleshooting
8.1 Problems and their possible solutions
If you have a problem with using the probe, check the following tables before contacting
Vaisala. If the problem you have is not listed in the tables, or if the proposed solution does not fix the problem, contact Vaisala technical support.
You can check the probe diagnostics and status with the Insight software and Modbus status registers (see
).
Response time is slower than specified
Problem: Response time is slower than specified.
Possible cause:
The filter is blocked.
The probe has fallen and the filter has hit the floor.
The probe has been exposed to unsuitable chemicals (for example, DMSO).
The measurement filtering factor is configured to be too slow.
Solution:
Change the filter.
Be careful not to touch the sensors when the filter is off the probe.
Remove the filter and visually check the sensors.
• If the sensors are bent, broken, or disconnected, contact
Vaisala technical support.
• If the sensors are intact, change the filter. The filter is made of porous material, and if the filter hits the floor, the filter material may get pressed and become less permeable. This reduces the rate at which air flows in and out of the filter, directly affecting the measurement.
Be careful not to touch the sensors when the filter is off the probe.
Change the filter and perform a chemical purge.
Be careful not to touch the sensors when the filter is off the probe.
Use the Vaisala Insight software, Modbus configuration register
030A hex
, or an Indigo 200 transmitter to disable the filtering factor (set filtering factor to "1"), and check the measurement again. See:
•
Measurement filtering factor (page 17)
•
Vaisala Insight software (page 45)
•
Configuration registers (page 80)
No actions required.
The ambient temperature has changed quickly, which may result in a slower change in RH reading.
61
HPP272 User Guide M211972EN-F
H
2
O
2
or humidity reading does not change during regular use for less than 5 minutes
Problem: H
2
O
2
or humidity reading does not change during regular use for less than 5 minutes.
Possible cause:
Purge is being performed
(duration of the purge is 4 minutes).
Solution:
No actions required.
H
2
O
2
or humidity reading does not change during regular use for more than 5 minutes.
Problem: H
2
O
2
or humidity reading does not change during regular use for more than 5 minutes.
Possible cause:
In analog mode: The scaling of the output is unsuitable, preventing the change from showing.
In analog mode: The error level is configured within the measurement output level, and the probe is in error state.
Solution:
Check and change the analog output scaling with Insight
software (see Vaisala Insight software (page 45)
).
Check the probe diagnostics with the Insight software (see
Vaisala Insight software (page 45) ).
Consider changing the analog output error level to be outside the measurement scale.
Measurement reading appears incorrect
Problem: Measurement reading appears incorrect.
Possible cause:
The temperature probe is installed near a heat source or too close to the H humidity probe.
The filter is wet.
2
O
2
and
Solution:
Change the location of temperature probe. See Installation
(page 25) for recommended installation locations.
Remove the filter, pour out any water, and let the filter dry.
Depending on air humidity and temperature, drying the filter in ambient air can take from a few hours to a day. Alternatively, you can dry the removed filter with nitrogen gas or dry pressurized air. When the filter is dry, reinstall the filter.
Be careful not to touch the sensors when the filter is off the probe.
Perform a chemical purge.
62
Chapter 8 – Troubleshooting
Problem: Measurement reading appears incorrect.
The filter is blocked or dirty.
Condensation has formed on the sensor when the probe was powered off.
The filter is not installed on the probe.
The yellow transport cap is still on the probe.
The filter is broken.
In analog mode: Maximum load has been exceeded.
Ambient pressure is not normal atmospheric pressure.
The PEROXCAP sensor is at the end of its life cycle.
Change the filter.
Be careful not to touch the sensors when the filter is off the probe.
When the probe is powered off, exposure to H heated sensor withstands condensing H
2
O
2
2
O
2
condensation can cause the PEROXCAP sensor to fail within a day, and the sensor will not recover. When the probe is powered on, the
conditions.
A sensor damaged with H
2 time cannot be repaired.
O
2
condensation during power-off
Do not use the probe without the filter. Install the filter on the probe.
Remove the yellow transport cap when measuring with the probe.
Do not use the probe if the filter is broken. Remove the filter and visually check the sensors:
• If the sensors are bent, broken, or disconnected, contact
Vaisala technical support.
• If the sensors are intact, change the filter.
Be careful not to touch the sensors when the filter is off the probe.
Check the analog output load, and reduce it to the specified maximum load or less. See output specifications for the permitted maximum load.
Check the ambient pressure. See operating environment specification for the permitted operating pressure.
Check the sensor vitality information in the Insight PC software diagnostics view. See
Sensor vitality information in Insight
.
H
2
O
2
concentration reading shows > 0 ppm even though the probe is not exposed to H
2
O
2
Problem: H
2
O
2
concentration reading shows > 0 ppm even though the probe is not exposed to H
2
O
2
.
Possible cause:
Normal variation due to a slight difference in behavior between the two humidity sensors.
Solution:
No actions required.
63
HPP272 User Guide M211972EN-F
Problem: H
2
O
2
concentration reading shows > 0 ppm even though the probe is not exposed to H
2
O
2
.
If the reading remains > 0 ppm for 2 ... 10 hours, H
2
O
2 concentration has drifted.
The intelligent measurement algorithm can correct errors of
< 30 ppm by itself when the probe is not exposed to H O
2
. Keep the probe powered on for a few hours in a stable temperature and RH, not exposed to H
2
O
2
.
2
The filter is wet
Problem: The filter is wet.
Possible cause:
Sprayed water has entered the filter when cleaning the probe.
Solution:
Remove the filter, pour out any water, and let the filter dry.
Depending on air humidity and temperature, drying the filter in ambient air can take from a few hours to a day. Alternatively, you can dry the removed filter with nitrogen gas or dry pressurized air. When the filter is dry, reinstall the filter.
Be careful not to touch the sensors when the filter is off the probe.
Perform a chemical purge.
The filter is broken
Problem: The filter is broken.
Possible cause:
The probe has fallen or an object has hit the filter.
Solution:
Do not use the probe if the filter is broken. Remove the filter and visually check the sensors:
• If the sensors are bent, broken, or disconnected, contact
Vaisala technical support.
• If the sensors are intact, change the filter.
Be careful not to touch the sensors when the filter is off the probe.
The probe does not power on, or there is no communication from the probe after power-on
Problem: The probe does not power on, or there is no communication from the probe after power-on.
Possible cause: Solution:
Power input to the probe is off. Turn on the power input to the probe.
64
Chapter 8 – Troubleshooting
Problem: The probe does not power on, or there is no communication from the probe after power-on.
Probe wiring is incorrect.
The probe cable is not properly connected.
The operating voltage is incorrect.
In digital mode: The communication settings (for example the device address) are incorrect either in the probe or in the system where the probe is connected.
Check the probe wiring and correct it if needed. See
Check the cable connection and correct it if needed.
Check the operating voltage and correct if needed. See input and output specifications for the correct voltage.
Check the communication settings. You can check the probe's communication settings with the Insight software. See
Insight PC software resets repeatedly (reset loop) and cannot be started
Problem: Insight PC software becomes stuck in a reset loop at start-up
Possible cause:
Insight SW version 1.0.2.76 can become stuck in a reset loop when using the ATEST output test selections or in certain sensor error states.
Solution:
Uninstall Insight SW version 1.0.2.76 and install either an older or newer Insight SW version. See www.vaisala.com/insight for the latest Insight
SW release, or contact Vaisala Support for earlier SW versions.
In analog mode, there is no output signal (signal level is 0 mA)
Problem: In analog mode, there is no output signal (signal level is 0 mA).
Possible cause:
Pin #5 was floating at start-up or reset, which means the probe is in digital mode.
Analog outputs are configured to be off.
Solution:
Check pin #5. See Wiring (page 27)
.
Probe wiring is incorrect.
The operating voltage is incorrect.
Check the analog output mode with the Insight software or
Modbus configuration registers 0700 hex
and 0800 hex
. See:
•
Vaisala Insight software (page 45)
•
Configuration registers (page 80)
Check the probe wiring and correct it if needed. See
Check the operating voltage and correct if needed. See input and output specifications for the correct voltage.
65
HPP272 User Guide M211972EN-F
Problem: In analog mode, there is no output signal (signal level is 0 mA).
The probe cable is not properly connected.
Check the cable connection and correct it if needed.
Power input to the probe is off. Turn on the power input.
The analog output error level is configured to be 0 mA, and the probe is performing start-up purge or is in error state.
Wait for 5 minutes for the possible start-up purge to finish. If the output remains 0 mA after 5 minutes, check the probe
diagnostics with the Insight software (see Vaisala Insight software (page 45) ).
Triggering manual purge with Modbus cannot be completed successfully
Problem: Triggering manual purge with Modbus (register 1283/0502 hex
) cannot be completed successfully.
Possible cause:
A value is written into the register before the purge has completed.
Solution:
The manual purge trigger register must only be written into once per purge cycle (write
1
into the register to start the purge). After starting the purge by writing
1
, the register value must only be read until the purge cycle has completed.
Write into and read from the register in the following order:
1. Write
1
to start the purge
2. Read the updating progress value (
1
…
100
%)
3. When the progress has reached
100
%, the value of the register changes either to
0
(purge completed successfully, purge not in progress) or
-1
(purge failed, purge not in progress)
4. After reading the final value (
0
or
-1
), a new purge can again be triggered by writing
1
.
In analog mode, start-up purge is not performed
Problem: In analog mode, start-up purge is not performed.
Possible cause:
The probe is in digital mode at start-up (pin #5 is floating).
Solution:
Check pin #5. See
66
Chapter 8 – Troubleshooting
At start-up in analog mode, the probe remains in the error state for over 5 minutes
Problem: At start-up in analog mode, the probe remains in the error state for over 5 minutes.
Possible cause:
The analog output scaling is unsuitable. For example, the scale 0 ... 5 %RH is too narrow compared to the full measurement scale of RH.
Solution:
Check the analog output scaling with the Insight software and
correct the scaling if needed (see
There is a probe or sensor error. Check the probe diagnostics with the Insight software (see
Vaisala Insight software (page 45)
).
8.2 Analog output error state
The probe sets the analog output channel into a defined error level instead of the measured result in three situations:
• Probe is performing start-up purge (duration 4 minutes).
• Probe detects a measurement malfunction. This means an actual measurement problem, such as sensor damage, or unsuitable environmental conditions.
• Measured value(s) are outside the error limits defined for the outputs.
The default error level for the analog outputs is 3.6 mA. You can change the error level (range
0 ... 25 mA) with the Insight software and via Modbus (registers 0706 hex
and 0806 hex
).
More information
‣
Configuration registers (page 80)
67
HPP272 User Guide M211972EN-F
9. Technical data
HPP272
Table 5 Measurement performance
Property Description/Value
Hydrogen peroxide
Sensor
Measurement range
Measurement temperature range
Repeatability at +25 °C (+77 °F) up to 500 ppm H
2
O
2 up to 1000 ppm H
2
O
2
Accuracy (including non-linearity, hysteresis, and repeatability) at +10 ... +25 °C
(+50 … +77 °F) , 10 ... 2000 ppm H
2
O
2
PEROXCAP
±10 ppm
±15 ppm
â
0 ... 2000 ppm
+5 ... +50 °C (+41 ... +122 °F)
±10 ppm or 5 % of reading (whichever is greater)
Factory calibration uncertainty, at +25 °C (+77 °F), 500 ppm H
2
O
2
Response time at +23 °C (+73 °F):
Response time (T
63
)
Response time (T
90
)
Relative saturation
Measurement range
Measurement temperature range
Repeatability at +25 °C (+77 °F), 500 ppm H
2
O
2
±10 ppm
70 s
200 s
0 ... 100 %RS
+5 ... +50 °C (+41 ... +122 °F)
±0.5 %RS
Accuracy (including non-linearity, hysteresis, and repeatability) at +25 °C (+77 °F):
Factory calibration uncertainty, at +25 °C (+77 °F), 500 ppm H
2
O
2
Relative humidity
±4 %RS
±2 %RS
Measurement range
Measurement temperature range
0 ... 100 %RH
+5 ... +70 °C (+41 ... +158 °F)
Accuracy (including non-linearity, hysteresis, and repeatability):
68
Chapter 9 – Technical data
Property Description/Value
at 0 ppm H
2
O
2
, 0 ... 90 %RH, +25 °C (77 °F) over full H
2
O
2
and temperature measurement range:
Response time (T
63
)
±1 %RH
±2 %RH
20 s
Factory calibration uncertainty, at +25 °C (77 °F), 0 ppm H
2
O
2
at 0 … 40 %RH at 40 … 95 %RH
±0.6 %RH
±1 %RH
Temperature
Sensor
Accuracy over temperature range
Pt-1000 RTD Class F0.1
±0.2 °C (±0.36 °F)
Other parameters
Absolute H
+H
2
O
2
2
O
2
and H
2
O, H
2
O ppm by volume, water vapor saturation pressure (H
), dew point temperature, vapor pressure (H
2
O and H
2
O
2
)
2
O and H
2
O
1) Defined as ±2 standard deviation limits. See also calibration certificate.
10
8
6
4
2
0
-6
-8
-2
-4
-10
5 15
Temperature [
°
C]
25
35 45 55
Figure 24 HPP272 RS measurement accuracy as function of temperature (including non-linearity and repeatability)
69
HPP272 User Guide
160
140
120
100
T = +40 ... +50 °C
80
60
40
20
0
0
+5 °
C < T
> +10 °
C or
+25 °
C < T
> +
40 °
C
T = +10 ... +25 °C
200 400 600 800 1000 1200 1400 1600 1800 2000
M211972EN-F
Figure 25 H
2
O
2
measurement accuracy in 3 temperature ranges as function of H
2
O
2
concentration
(including non-linearity and repeatability; specification valid for range 10 … 2000 ppm H
2
O
2
)
Table 6 Inputs and outputs
Property
Operating voltage
Description/Value
Digital output: 15 ... 30 VDC
Analog output: 15 ... 25 VDC
Current consumption at +25 °C (+77 °F)
In digital mode
In analog mode
During purge
Digital output
Interface
Bit rate
Parity
Data bits
Stop bits
Communication protocol
Analog output
Outputs
Max. 10 mA
Max. 50 mA
Max. 250 mA
RS-485, not isolated; do not use termination on the
RS-485 line
9600, 19200 (default), 38400, 57600, or 115200 bps
None (default), even, odd
8
1, 2 (default)
Modbus RTU v.1.02
2 × 4 ... 20 mA 3-wire current outputs
70
Chapter 9 – Technical data
Property Description/Value
Max. load 500 Ω
Accuracy ±0.1 % of full scale
Analog output temperature dependence 0.005 %/˚C (0.003 %/°F) full scale
Table 7 Mechanical specifications
Property
Weight
IP rating
Connector
Materials
Probe body
Filter cap
Temperature probe
Temperature probe cable
Table 8 Operating environment
Property
Operating temperature
Storage temperature
Ambient pressure
EMC compliance
Description/Value
130 g (4.58 oz)
IP65
M12/5 male
AISI316L stainless steel
Porous PTFE
AISI316L stainless steel
PTFE
Description/Value
+0 ... +70 °C (+32 ... +158 °F)
-20 ... +70 °C (-4 ... +158 °F)
Normal atmospheric pressure
EN/IEC 61326-1, Industrial Environment
9.1 Accessories
Table 9 Spare parts and accessories
Name
Probe cable with open wires (1.5 m)
Probe cable with open wires (3 m)
Probe cable with open wires (5 m)
Order Code
242659
254294SP
254295SP
254296SP
71
HPP272 User Guide M211972EN-F
Name
Probe cable with open wires (10 m)
Probe cable with open wires and 90° plug (0.6 m)
Filter
Gland set for through-wall installation, HPP272
Flange for through-wall installation, HPP272
Wall mount for HPP271 and HPP272
Transmitters
Indigo transmitters
Connection cable to Indigo (1 m)
Connection cable to Indigo (3 m)
Connection cable to Indigo (5 m)
Connection cable to Indigo (10 m)
Order Code
254297SP
244669SP
DRW246363SP
HPP272MOUNTINGSET1
HPP272MOUNTINGSET2
HPP272WALLMOUNT
See www.vaisala.com/indigo
INDIGOCABLEHD1M5
INDIGOCABLEHD3M
INDIGOCABLEHD5M
INDIGOCABLEHD10M
1) Vaisala Insight software for Windows available at www.vaisala.com/insight
9.2 Dimensions
118.3
400
22
Ø=16/18.5
44
Ø=18.5
38.5
Ø=30
70, Ø=4.8
Figure 26 HPP272 dimensions mm
More information
‣
HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 dimensions (page 73)
‣
HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 dimensions (page 74)
72
Chapter 9 – Technical data
9.2.1 HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 dimensions
Figure 27 (page 73) shows the dimensions of the gland through-wall installation accessory
HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 in millimeters and [inches].
For an installation example, see Installation (page 25) .
44 [1.73]
31 [1.22]
50 [1.97]
Ø 30 [1.18]
Ø 40 [1.57]
Ø 8 [0.31]
Ø 12 [0.47]
Ø 5 [0.196]
Ø 12
[0.47]
14 [0.55]
24 [0.94]
Figure 27 HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 dimensions
mm
[in]
For more information on using the gland through-wall installation accessory, see the accessory Quick Guide
M212195EN
.
More information
‣
73
HPP272 User Guide M211972EN-F
9.2.2 HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 dimensions
Figure 28 (page 74) shows the dimensions of the flange through-wall installation accessory
HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 in millimeters and [inches].
For an installation example, see
.
10 [0.39]
Ø 60 [2.36]
M4
Ø 18.7 [0.74]
Ø 8 [0.31]
Ø 12 [0.47]
Ø 5 [0.196]
Ø 12
[0.47]
14 [0.55]
24 [0.94]
Figure 28 HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 dimensions
mm
[in]
For more information on using the flange through-wall installation accessory, see the accessory Quick Guide
M212194EN
.
More information
‣
74
Chapter 9 – Technical data
9.2.3 HPP272WALLMOUNT dimensions
shows the dimensions of the HPP271/HPP272 wall mounting accessory
HPP272WALLMOUNT in millimeters and [inches].
31 [1.22]
24 [0.94]
29 [1.14]
Figure 29 HPP272WALLMOUNT dimensions
For more information on using the wall mounting accessory, see the accessory
Quick Guide
M212179EN
.
mm
[in]
More information
‣
75
HPP272 User Guide
Appendix A. Modbus reference
A.1 Default communication settings
Table 10 Default Modbus serial communication settings
Description
Serial bit rate
Parity
Number of data bits
Number of stop bits
Modbus device address
Default value
19200
N
8
2
240
A.2 Function codes
Table 11 Modbus function codes
Function code
(decimal)
03
Function code
(hexadecimal)
03 hex
16
43 / 14
10 hex
2B hex
/ 0E hex
Name
Read Holding
Registers
Write Multiple
Registers
Read Device
Identification
Notes
Class 0
Class 0
M211972EN-F
A.3 Data encoding
In the data registers, the numeric values are available in one or two formats with separate register addresses: 32-bit IEEE floating point format and/or 16-bit signed integer format.
For values that have both 32-bit and 16-bit register available, use of the 32-bit register is recommended. Some values may exceed the signed 16-bit range even in normal operation.
76
Appendix A – Modbus reference
A.3.1 32-bit floating point or integer format
Registers using
32-bit float
data format are encoded using the
binary32
encoding defined in
IEEE 754. The format is also known as "single-precision floating point format".
The least significant 16 bits of a floating point number are placed at the Modbus register listed in the table, while the most significant 16 bits are placed in the register with number/ address + 1, as specified in Open Modbus TCP Specification, Release 1.0. This is also known as
"little-endian" or "Modicon" word order.
Despite the specification, some Modbus masters may expect a "big-endian" word order (most significant word first). In such case, you must select "word-swapped" floating point format in your Modbus master for the Modbus registers of the device.
A complete 32-bit floating point or integer value should be read and written in a single Modbus transaction.
Reading the measurement data registers with incorrect floating point format setting may occasionally result in correct-looking values. It is highly recommended to verify that you have configured the floating point format correctly on your Modbus host system by reading a floating point value from a test value register.
A.3.2 16-bit integer format
Some 16-bit integer values in the data registers are scaled to include the necessary decimals.
The scaling factors for those values are shown in the register tables.
Table 12 Interpretation of 16-bit signed integer values
Value Description
0000 hex
… 7FFE hex
Value in range 0 … 32766
7FFF hex
8000 hex
Value is 32767 or larger
Value is not available
8001 hex
8002 hex
… FFFF hex
Value is −32767 or smaller
Value in range −32766 … −1 (2’s complement)
77
HPP272 User Guide M211972EN-F
A.4 Modbus registers
CAUTION!
Registers are numbered in decimal, starting from 1. Register addresses in actual Modbus messages (Modbus Protocol Data Unit (PDU) are in hexadecimal and start from zero. Subtract 1 from the register number presented in this manual to get the address used in the Modbus message. For example, register number 1 corresponds to address 0 hex
in the actual Modbus message.
Please check the reference documentation of your Modbus host (PLC) for the notation of Modbus register addresses.
A.4.1 Measurement data registers
19
21
23
11
15
7
9
17
3
5
Table 13 Modbus measurement data registers (read-only)
1
Register number
(decimal)
Address
(hexadecimal)
0000 hex
Register description
25
0002
0004
0006
0008
000A
000E
0010
0012 hex hex hex hex hex hex
0014 hex
0016 hex
0018 hex hex hex
Data format
Unit
Vaporized hydrogen peroxide concentration by volume
H
2
O+H
2
O
2
relative saturation
Temperature used for calculation. By default, shows the temperature from the temperature probe (register
0016 hex
).
If temperature compensation is turned
ON (register 0505 hex
), this register shows the volatile value for given temperature reading (register 0302 hex
).
.
Relative humidity
32-bit float ppm
32-bit float %RS
32-bit float °C
32-bit float %RH
Absolute hydrogen peroxide
H
2
O+H
2
O
2
dew point temperature
Water concentration by volume
Water vapor pressure
32-bit float mg/m
3
32-bit float °C
32-bit float ppm
32-bit float hPa
Absolute humidity (water)
Water vapor saturation pressure
Temperature from the temperature probe
H
2
O
2
vapor pressure
32-bit float g/m 3
32-bit float hPa
32-bit float °C
32-bit float hPa
78
Appendix A – Modbus reference
Register number
(decimal)
27
Address
(hexadecimal)
Register description
001A hex
257
258
259
260
261
262
264
265
266
267
0100
0101
0102
0103
0104
0105
0107
0108
0109 hex hex
010A hex hex hex hex hex hex hex hex
Data format
Unit
Water vapor saturation pressure (H
2
O
+H
2
O
2
)
32-bit float hPa
Vaporized hydrogen peroxide concentration by volume
H
2
O+H
2
O
2
relative saturation
16-bit signed integer
16-bit signed integer
Temperature used for calculation. By default, shows the temperature from the temperature probe (register
010B hex
).
If temperature compensation is turned
ON (register 0505 hex
), this register shows the volatile value for given temperature reading (register 0302 hex
).
See
Relative humidity
16-bit signed integer
16-bit signed integer
Absolute hydrogen peroxide
H
2
O+H
2
O
2
dew point temperature
Water concentration by volume
Water vapor pressure
Absolute humidity (water)
16-bit signed integer
16-bit signed integer
Water vapor saturation pressure (H
2
O) 16-bit signed integer
16-bit signed integer
16-bit signed integer
16-bit signed integer ppm
%RS * 100
°C * 100
%RH *100 mg/m g/m
3
3
°C * 100 ppm hPa hPa
79
HPP272 User Guide M211972EN-F
Register number
(decimal)
268
Address
(hexadecimal)
010B hex
269
270
010C
010D hex hex
Register description Data format
Temperature from the temperature probe
H
2
O
2
vapor pressure
Water vapor saturation pressure (H
2
+H
2
O
2
)
O
16-bit signed integer
16-bit signed integer
16-bit signed integer
Unit
°C * 100 hPa hPa
A.4.2 Configuration registers
CAUTION!
Default power-up values (registers 773 ... 775) are written into nonvolatile EEPROM memory. The EEPROM memory implementation has a limit of
30000 writes, and is intended to be used only when saving long-term or permanent configurations. Use the volatile memory (registers 769 ... 771, values cleared on power-up) for non-permanent configurations (for example, if the probe is used in a system that regularly updates the given values).
Table 14 Modbus configuration data registers (writable)
Register number
(decimal)
769
Address
(hexadecimal)
0300 hex
Register description
Volatile value for pressure compensation
(value cleared at probe reset). Used for compensating the measurement for pressure if pressure compensation is turned
ON (register 0504 hex
).
Data format
Unit / Valid range
32-bit float hPa
813.25 ... 1213.25
(default 1013.25 hPa)
(Init copied from powerup value)
80
Appendix A – Modbus reference
Register number
(decimal)
771
Address
(hexadecimal)
Register description
0302 hex
773
775
777
779
0304
0306
0308
030A hex hex hex hex
Data format
Unit / Valid range
Volatile value for given temperature reading
(value cleared at probe reset). Used for calculations instead of the temperature from the temperature probe if temperature compensation is turned
ON (register 0505 hex
).
Power-up value for pressure compensation
32-bit float °C
-40 ... +80
(Init copied from powerup value)
Power-up value for given temperature reading
Purge interval
32-bit float hPa
813.25 ... 1213.25
(default 1013.25 hPa)
32-bit float °C
-40 ... +80
16-bit integer min
60 ... 10080
(= 1 hour ... 1 week)
(default: 1440 (= 24 hours))
Measurement filtering factor (does not affect temperature, water, or RH measurement)
32-bit float Range: 0.01 ... 1
1 = Filter is disabled
< 1 = Reading is a combination of latest measurement and the earlier reading. The value of the register defines the portion of the latest measurement, for example, 0.9 means the reading consists 90 % of the latest measurement and 10 % of the earlier reading.
81
HPP272 User Guide
Register number
(decimal)
783
Address
(hexadecimal)
030E hex
Register description
Low H
2
O
2 on/off
threshold
785
787
789
791
0310 hex
0312 hex
0314 hex
0316 hex
Low H
2
O
2 threshold activation level
Low H
2
O
2
threshold activation delay
Low H
2
O
2
threshold deactivation level
Low H
2
O
2
threshold deactivation delay
M211972EN-F
Data format
Unit / Valid range
16-bit boolean
0 = Off
1 = On
(default: 0 = Off)
When enabled, the Low
H
2
O
2 threshold feature remains in use also after probe reset.
32-bit float ppmH
2
O
2
(default: 3)
See H 2 O 2 concentration reading when not exposed to H 2
32-bit integer
Seconds (default: 1800)
See H 2 O 2 concentration reading when not exposed to H 2
32-bit float ppmH
2
O
2
(default: 10)
See H 2 O 2 concentration reading when not exposed to H 2
32-bit integer
Seconds (default: 10)
See H 2 O 2 concentration reading when not exposed to H 2
82
Appendix A – Modbus reference
Register number
(decimal)
1283
1285
1286
Address
(hexadecimal)
Register description
0502 hex
0504
0505 hex hex
Purge status / manual start
Pressure compensation on/off
Temperature compensation mode
Data format
16-bit function status
16-bit boolean enum
Unit / Valid range
When reading from register:
1 ... 100 = Purge is in progress (progress shown as 1 ... 100%)
0 = Previous purge completed successfully, purge is not in progress
... -1 = Previous purge has failed
When writing to register:
1 = Start purge
Note: After starting the purge by writing 1, only read from the register until the purge has completed. See the related section in
Problems and their possible solutions
1 = On
0 = Off
0 = Use temperature measured by temperature probe in the calculation of other measurement parameters.
1 = Use a setpoint temperature value in the calculation of other measurement parameters instead of the temperature measured by the temperature probe. Define the setpoint value in registers
0302 hex
(volatile value) and 0306 hex
(power-up value).
(default: 1 = Use a setpoint value)
83
HPP272 User Guide M211972EN-F
Register number
(decimal)
1287
Address
(hexadecimal)
0506 hex
1288
1537
1538
1539
1540
1541
0507
0600
0601
0602
0603
0604 hex hex hex hex hex hex
Register description
Manual purge trigger in analog mode on/off
Allow interval purge during H
Bit rate
2
O
2
exposure
Modbus address
Parity, number of data bits, number of stop bits
Response delay
Restart device
Data format
16-bit boolean
16-bit boolean
16-bit integer enum enum
16-bit integer
16-bit function status
Unit / Valid range
1 = On
0 = Off
(default: 1 = On)
1 = On
0 = Off
(default: 0 = Off)
1 ... 255 (default: 240)
5 = 9600
6 = 19200
7 = 38400
8 = 57600
9 = 115200
(default: 6 = 19200)
0 = None, 8, 1
1 = None, 8, 2
2 = Even, 8, 1
3 = Even, 8, 2
4 = Odd, 8, 1
5 = Odd, 8, 2
(default: 1 = None, 8, 2) ms
0 ... 1000
When writing to register:
1 = Restart the device
Analog Output 1:
1793 0700 hex
Output mode enum 0 = Off
2 = 4 ... 20 mA
(default: 2 = 4 ... 20 mA)
84
Register number
(decimal)
1794
Address
(hexadecimal)
Register description
0701 hex
Output parameter
1795
1797
1799
1801
1803
0702
0704
0706
0708
070A hex hex hex hex hex
Scale low end
Scale high end
Error output
Low clipping limit
Low error limit
Appendix A – Modbus reference
Data format
Unit / Valid range
16-bit register address
Valid range
0000 hex
... 001A hex
.
For the available parameters and their register addresses, see
32-bit float Set the lower limit of the measurement scale for the output parameter chosen in register 0701 hex
(Output parameter).
32-bit float Set the upper limit of the measurement scale for the output parameter chosen in register 0701 hex
(Output parameter).
32-bit float mA
0 ... 25
32-bit float % of scaled range
0 ... 20 = Clip the output when the measurement goes this many percent below the low end of the scale
NaN = Disable clipping limit at low end
32-bit float % of scaled range
0 ... 20 = Set the output in error state when the measurement goes this many percent below the low end of the scale
NaN = Disable error limit at low end
85
HPP272 User Guide
Register number
(decimal)
1805
Address
(hexadecimal)
070C hex
Register description
High clipping limit
1807 070E
Analog Output 2:
2049
2050
2051
2053
2055
0800
0801
0802
0804
0806 hex hex hex hex hex hex
High error limit
Output mode
Output parameter
Scale low end
Scale high end
Error output
M211972EN-F
Data format
Unit / Valid range
32-bit float % of scaled range
0 ... 20 = Clip the output when the measurement goes this many percent above the high end of the scale
NaN = Disable clipping limit at high end
32-bit float % of scaled range
0 ... 20 = Set the output in error state when the measurement goes this many percent above the high end of the scale
NaN = Disable error limit at high end enum
16-bit register address
0 = Off
2 = 4 ... 20 mA
(default: 2 = 4 ... 20 mA)
Valid range
0000 hex
... 001A hex
.
For the available parameters and their register addresses, see
.
32-bit float Set the lower limit of the measurement scale for the output parameter chosen in register 0801 hex
(Output parameter).
32-bit float Set the upper limit of the measurement scale for the output parameter chosen in register 0801 hex
(Output parameter).
32-bit float mA
0 ... 25
86
Register number
(decimal)
2057
Address
(hexadecimal)
Register description
0808 hex
Low clipping limit
2059
2061
2063
2817
2829
080A
080C
080E
0B00
0B0C hex hex hex
Service Agreement:
hex hex
Low error limit
High clipping limit
High error limit
Customer name
Contract number
Appendix A – Modbus reference
Data format
Unit / Valid range
32-bit float % of scaled range
0 ... 20 = Clip the output when the measurement goes this many percent below the low end of the scale
NaN = Disable clipping limit at low end
32-bit float % of scaled range
0 ... 20 = Set the output in error state when the measurement goes this many percent below the low end of the scale
NaN = Disable error limit at low end
32-bit float % of scaled range
0 ... 20 = Clip the output when the measurement goes this many percent above the high end of the scale
NaN = Disable clipping limit at high end
32-bit float % of scaled range
0 ... 20 = Set the output in error state when the measurement goes this many percent above the high end of the scale
NaN = Disable error limit at high end
24character
ASCII string
Read-only
24character
ASCII string
Read-only
87
HPP272 User Guide M211972EN-F
Register number
(decimal)
2841
Address
(hexadecimal)
0B18 hex
Register description
Start date
2844 0B1B hex
End date
Data format
Unit / Valid range
three 16-bit integer decimal values
(YYYY, M, and D) three 16-bit integer decimal values
(YYYY, M, and D)
Read-only
Read-only
Factory Settings:
7937 1E00 hex
0201 hex
Restore factory settings 16-bit function status
When writing to register:
1 = Restore factory settings (cancel all changes made by the user) and remove all field adjustments. Resets the device.
A.4.3 Status registers
Table 15 Modbus status registers (read-only)
Register number
(decimal)
513
Address
(hexadecimal)
0200 hex
Register description
Device status
514 Status code low
Data format
16-bit
32-bit
Notes
0 = Status OK.
1 = Critical error, maintenance needed.
2 = Error, device may recover automatically.
4 = Warning.
8 = Notification.
16 = Calibration enabled.
88
Appendix A – Modbus reference
Register number
(decimal)
516
Address
(hexadecimal)
Register description Data format
Notes
529
530
531
532
533
534
536
537
538
539
540
541
542
0203
0210
0211
0212
0213
0214
0215
0217
0218
0219
021A
021B
021C hex hex hex
021D hex hex hex hex hex hex hex hex hex hex hex
Status code high 32-bit
Status of Hydrogen peroxide concentration by volume
Status of H
2
O+H
2
O
2 relative saturation
Status of Temperature
16-bit
16-bit
16-bit
Status of Relative humidity
Status of Absolute hydrogen peroxide
Status of H
2
O+H
2
O
2 point temperature
dew
Status of Water concentration by volume
Status of Water vapor pressure
Status of Absolute humidity
Status of Water vapor saturation pressure
Status of Temperature from the temperature probe
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
Status of H
2
O
2
pressure 16-bit
Status of H
2
O+H
2 vapor pressure
Sensor Vitality
O
2
16-bit
32-bit float
See
0 = Status OK.
2 = Reading is not reliable.
32 = Reading is locked during purge.
64 = Calibration has expired.
128 = Sensor failure.
256 = Measurement not ready
547 0222 hex
1) Multiple statuses can be present simultaneously. In those cases, the value of the status register is the sum of the status values. For example, the value of the device status register is
6
if a warning (
4
) and an error (
2
) are present simultaneously.
89
HPP272 User Guide
Table 16 Error codes in register 0201 hex
(32-bit)
Error message Value of register
0201 hex
1024
16384
32768
262144
524288
4194304
8388608
2
8
16
1
0
32
64
Status OK.
Firmware checksum mismatch.
Device settings corrupted.
Supply voltage too high.
Internal voltage too low.
Internal voltage too high.
Humidity sensor failure (open circuit).
Humidity sensor failure (open circuit).
Temperature sensor failure (open circuit).
Temperature sensor failure (short circuit).
Temperature sensor failure (open circuit).
Temperature sensor failure (short circuit).
Temperature sensor failure (open circuit).
Temperature sensor failure (short circuit).
Table 17 Error codes in register 0203 hex
(32-bit)
Error message Value of register
0203 hex
0
256
512
4096
8192
16384
32768
65536
Status OK.
A/D converter failure (external).
Non-volatile memory read/write failure.
Humidity sensor failure (short circuit).
Purge in progress.
A/D converter failure (internal).
Calibration is about to expire.
Calibration has expired.
90
M211972EN-F
Severity
Error
Error
Error
Error
Error
Error
Error
Critical
Critical
Error
Error
Error
Error
Severity
Error
Error
Error
Info
Error
Info
Warning
Appendix A – Modbus reference
A.4.4 Device identification objects
Table 18 Device identification objects
1
0
2
3
4
Object id Object id
(hexadecimal)
128
129
130
00
01
02
03
04
80
81
82 hex hex hex hex hex hex hex hex
Object name Example contents
VendorName
ProductCode
“Vaisala”
"HPP272"
MajorMinorVersion "1.2.3"
Software version of the device.
VendorUrl “http://www.vaisala.com/”
ProductName
"Hydrogen Peroxide, Humidity, and
Temperature Probe HPP272"
“K0710040”
CalibrationText
"2020-01-31"
Calibration date in YYYY-MM-DD format.
Empty string if not set/valid.
"Vaisala/HEL"
Calibration information text. Empty string if not set/valid.
1) Vaisala-specific device identification object.
A.4.5 Test value registers
Table 19 Test value registers
Register number
(decimal)
7937
7938
7940
Address
(hexadecimal)
1F00 hex
1F01 hex
1F03 hex
Register description
Signed integer
Floating point
Text string
Data format Value
16-bit integer
32-bit float
8-character ASCII string
-12345
-123.45
"-123.45"
91
HPP272 User Guide M211972EN-F
A.5 Modbus communication examples
Reading H
2
O
2
concentration value
Device address used in the following examples is 240 (F0 hex
).
The values returned by the device differ depending on the ambient conditions and/or device settings. Your device might not return exactly same values.
Request
Bytes on the line
(hexadecimal)
Description
(silence for 3.5 bytes) Start of Modbus RTU frame
F0 hex
HPP272 address
03 hex
00 hex
00 hex
Function (Read
Holding Registers)
Register address
00 hex
Number of 16-bit registers to read (2)
02 hex
D1 hex
Modbus RTU checksum
2A hex
(silence for 3.5 bytes) End of Modbus RTU frame
Response
Bytes on the line
(hexadecimal)
Description
(silence for 3.5 bytes) Start of Modbus RTU frame
F0 hex
HPP272 address
03 hex
04 hex
D4 hex
Function (Read
Holding Registers)
Number of data bytes
7A
43
E8
33 hex hex hex hex
AB hex
Value of first register
(least significant word)
Value of second register (most significant word)
Modbus RTU checksum
(silence for 3.5 bytes) End of Modbus RTU frame
Communication description
Register address
Data format
Returned value
1 (1-based Modbus documentation format) =
0000 hex
(0-based format used in actual communication).
Two 16-bit Modbus registers interpreted as IEEE
754 binary32 floating point value, least significant word first.
43E8D47A hex
, which is binary32 representation of 465.65997 (ppm).
92
Appendix A – Modbus reference
Writing purge interval value
Request Response
Bytes on the line
(hexadecimal)
F0 hex
Description
(silence for 3.5 bytes) Start of Modbus RTU frame
HPP272 address
10 hex
Function (Write
Multiple Registers)
Register address 03 hex
08 hex
00 hex
Number of registers to write (1)
01 hex
Number of data bytes 02 hex
0B hex
40 hex
Value for the register
Bytes on the line
(hexadecimal)
F0 hex
Description
(silence for 3.5 bytes) Start of Modbus RTU frame
HPP272 address
10 hex
03 hex
08 hex
Function (Write
Multiple Registers)
Register address
00 hex
01 hex
95 hex
6E hex
Number of 16-bit registers written (1)
Modbus RTU checksum
(silence for 3.5 bytes) End of Modbus RTU frame
9B hex
4C hex
Modbus RTU checksum
(silence for 3.5 bytes) End of Modbus RTU frame
The response to a write function informs that the function was correctly received by the device. It does not guarantee that the written value was accepted by the device (for example, in case out-of-range values).
To verify that the value was really accepted by the device, read the register value after writing.
Communication description
Register address
Data format
777 (1-based Modbus documentation format) =
0308 hex
(0-based format used in actual communication).
One 16-bit Modbus register interpreted as 16-bit integer value.
93
HPP272 User Guide
Communication description
Value to write
M211972EN-F
0B40 hex
= 2880 (minutes) (= 48 hours)
94
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 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.
Follow the statutory regulations for disposing of the product and packaging.
95
www.vaisala.com
advertisement
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Related manuals
advertisement