Vaisala HPP271 User manual

Vaisala HPP271 User manual

M211888EN-C

User Guide

Vaisala PEROXCAP

â

Hydrogen Peroxide Probe

HPP271

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 2019 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

1.

1.1

1.2

1.3

1.4

1.5

1.6

2.

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

2.10

2.11

About This Document ................................................................................... 5 Version Information .......................................................................................... 5 Related Manuals ................................................................................................ 5

Documentation Conventions ...........................................................................6

Trademarks ........................................................................................................ 6

Regulatory Compliances .................................................................................. 7 Patent Notice .....................................................................................................7

Product Overview ........................................................................................... 8 Introduction to HPP271 .....................................................................................8

Basic Features and Options .............................................................................9

Safety ................................................................................................................. 9

ESD Protection ................................................................................................ 10 Measured Parameters .....................................................................................10

Probe Filter ........................................................................................................11

Chemical Purge .................................................................................................11

Environmental Compensation for Pressure ..................................................12

Measurement Filtering Factor ........................................................................12

Connectivity to Vaisala Insight Software ......................................................12

Additional Features with Indigo Transmitters ..............................................13

3.

3.1

3.2

4.

4.1

4.2

4.3

H 2 O 2 Measurement ....................................................................................... 14 Operating Principle of H 2 O 2 Measurement .................................................. 14

Typical Applications ........................................................................................ 15

Installation ........................................................................................................ 18

Wiring .............................................................................................................. 20

Power Supply .................................................................................................. 22 Setting Probe in Analog or Digital Mode .....................................................22

5.

5.1

5.2

5.3

5.4

5.5

5.5.1

5.5.2

5.5.3

5.6

5.6.1

5.6.2

5.6.3

5.6.4

Operation ......................................................................................................... 23 Probe Start-Up ................................................................................................23

Behavior at Exposure to H 2 O 2 .......................................................................23

H 2 O 2 Concentration Reading When Not Exposed to H 2 O 2 .......................23

Modbus ............................................................................................................ 24 Operation in Analog Mode ............................................................................ 24 Analog Output Overrange Behavior .....................................................24

Analog Output Overrange Examples ....................................................25

Triggering Purge in Analog Mode

Using Probe with Indigo Transmitters Indigo Overview

Attaching Probes

......................................................... 28

......................................................... 29 ...................................................................................... 29

......................................................................................31

Connecting to Wireless Configuration Interface

Logging in to Wireless Configuration Interface

................................. 32

...................................33

1

HPP271 User Guide

6.

6.1

Vaisala Insight Software ............................................................................ 34 Connecting to Insight Software ....................................................................34

7.

7.1

7.2

7.3

7.1.1

7.3.1

7.3.2

7.3.3

7.3.4

7.3.5

7.3.6

7.4

Maintenance ....................................................................................................35

Cleaning the Probe .........................................................................................35

Chemical Tolerance ................................................................................. 35

Sensor Vitality Information in Insight .......................................................... 36 Calibration and Adjustment .......................................................................... 36

Field Calibration and Adjustment Overview ........................................ 37

RH for H 2 O 2 Calibration and Adjustment ............................................. 38

Adjusting RH for H 2 O 2 with Insight Software ......................................39

Adjusting RH for H 2 O 2 with Indigo 200 Transmitter ........................... 41

Adjusting H 2 O 2 Measurement with Insight Software ......................... 42

Adjusting H 2 O 2 with Indigo 200 Transmitter ...................................... 44

Testing Analog Output Level with Insight ...................................................45

8.

8.1

8.2

Troubleshooting ............................................................................................ 47 Problems and Their Possible Solutions ........................................................47

Analog Output Error State ............................................................................ 53

9.

9.1

9.2

9.2.1

9.2.2

9.2.3

Technical Data ................................................................................................54

Accessories ......................................................................................................56

Dimensions ...................................................................................................... 57

HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 Dimensions .........58

HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 Dimensions .......59

HPP272WALLMOUNT Dimensions ....................................................... 60

Appendix A: Modbus Reference.................................................................. 61 A.1

Default Communication Settings .................................................................. 61 A.2

Function Codes ................................................................................................61

A.3

A.3.1

Data Encoding ................................................................................................. 61 32-Bit Floating Point or Integer Format ................................................61

A.3.2

A.4

A.4.1

A.4.2

16-Bit Integer Format Modbus Registers ..............................................................................62

...........................................................................................62

Measurement Data Registers Configuration Registers .................................................................63

..........................................................................63

A.4.3

A.4.4

A.4.5

A.5

Status Registers ...................................................................................... 70

Device Identification Objects ..................................................................71

Test Value Registers ................................................................................ 72

Modbus Communication Examples ..............................................................73

Warranty............................................................................................................ 77 Technical Support............................................................................................77

Recycling........................................................................................................... 77

M211888EN-C 2

Figure 4

Figure 5 Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

List of Figures

Figure 1

Figure 2

Figure 3

Figure 20

Figure 21

Figure 22

Figure 23

Probe Parts..........................................................................................................8

Operating principle of PEROXCAP measurement.................................. 15

Example behavior of H vaporized H 2 O 2 2 O 2 concentration, relative saturation (RS), and relative humidity (RH) in a bio-decontamination cycle (non condensing conditions)..................................................................................17

Pins on the Probe M12/5 Male Connector................................................ 20

Wiring Example for Connecting the Probe to a PLC in Analog Mode..................................................................................................... 21 Wiring Example for RS-485 Connection (Modbus Communication)...............................................................................................21

Pins on the Probe M12/5 Male Connector.................................................22

Maximum extensions to analog output range........................................ 25

Analog output overrange example with clipping and error limits.... 26

Analog output overrange example with clipping only......................... 27

Analog output overrange example with no clipping, only error state when error limit is exceeded..........................................28

Attaching Probes to Indigo........................................................................... 31

Enabling and Accessing Indigo's Wireless Configuration Interface.............................................................................................................32

Indigo Login View........................................................................................... 33

Connecting Probe to Insight........................................................................34

PEROXCAP Operating Principle..................................................................38

Adjustment removes drift.............................................................................39

Setting Current Level for Analog Output Test in Insight Software... 45

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 )...................................................................... 55

HPP271 Dimensions........................................................................................ 57

HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 Dimensions......... 58

HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 Dimensions....... 59

HPP272WALLMOUNT Dimensions............................................................ 60

List of Figures 3

HPP271 User Guide

Table 1 Table 2

Table 3

Table 4

Table 5

Table 6

Table 7 Table 8 Table 9

Table 10 Table 11

Table 12

Table 13 Table 14

Table 15 Table 16

Table 17 Table 18

Table 19

List of Tables

Document Versions..............................................................................................5

Related Manuals....................................................................................................5

Applicable Patents or Applications.................................................................7

Available Parameters.........................................................................................10

Measurement Performance.............................................................................54

Inputs and Outputs............................................................................................55

Operating Environment....................................................................................56

Mechanical Specifications............................................................................... 56 Spare Parts and Accessories...........................................................................56

Default Modbus Serial Communication Settings....................................... 61 Modbus Function Codes................................................................................... 61

16-bit Signed Integer Format Details........................................................... 62

Modbus Measurement Data Registers (Read-Only)................................ 63 Modbus Configuration Data Registers (Writable).................................... 63

Modbus Status Registers (Read-Only)........................................................ 70 Error Codes in Register 0201 hex (32-bit)..................................................... 70

Error Codes in Register 0203 hex (32-bit)..................................................... 71 Device Identification Objects...........................................................................71

Test Value Registers...........................................................................................72

M211888EN-C 4

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 Probe HPP271.

Table 1 Document Versions

Document Code

M211888EN-C

Date

October 2019

Description

M211888EN-B M211888EN-A October 2019 October 2018 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 2 O 2 measurement accuracy graph updated • Updated the maintenance limit for sensor vitality value when using the probe in demanding environments • Added troubleshooting information on triggering purge with Modbus register 1283 (0502 in ambient conditions hex ) and Insight PC software reset loop issue in SW version 1.0.2.76

• Added information on how long calibration remains valid First version.

1.2 Related Manuals

Table 2 Related Manuals

Document Code

M211887EN M211972EN M212195EN M212194EN

Name

Hydrogen Peroxide, Humidity and Temperature Probe HPP270 Series Quick Guide Hydrogen Peroxide, Humidity and Temperature Probe HPP272 User Guide HPP271MOUNTINGSET1 / HPP272MOUNTINGSET1 Installation Kit Quick Guide HPP271MOUNTINGSET2 / HPP272MOUNTINGSET2 Installation Kit Quick Guide

5

HPP271 User Guide M211888EN-C

Document Code

M212179EN-A M211877EN M211966EN

Name

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.

6

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 7

8 HPP271 User Guide

2. Product Overview

M211888EN-C

2.1 Introduction to HPP271

Vaisala PEROXCAP decontamination.

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 bio Hydrogen Peroxide Probe HPP271 provides measurement for vaporized H 2 O 2 concentration.

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 is powered off, exposure to H 2 O always be powered on. When powered on, the PEROXCAP sensor is heated, which permits using the probe in condensing H 2 O 2 2 in the probe's environment, the probe must within a day, and the sensor will not recover.

2 O 2 conditions, maintains measurement performance, and lengthens the probe's lifetime. When the probe condensation can break the PEROXCAP sensor 2 3 4 5 3 4 5 1 Figure 1 Probe Parts 2 Yellow transport cap. Remove this cap before using the probe.

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.

PEROXCAP sensor under the filter.

Hydrogen peroxide probe.

5-pin M12 connector

Chapter 2 – Product Overview

More Information

‣ ‣ ‣ ‣

Dimensions (page 57)

Operating Principle of H2O2 Measurement (page 14)

Installation (page 18)

Wiring (page 20)

2.2 Basic Features and Options

• Vaisala PEROXCAP â H 2 O 2 measurement technology with excellent long-term stability.

• Vaporized H 2 O 2 measurement range 0 ... 2000 ppm.

• 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 • Easy plug-in, plug-out.

2 • Analog output: 2 x 4 ... 20 mA.

O 2 and H 2 O concentration measurement.

• Digital output: RS-485 interface for Modbus communication.

• Field calibration and adjustment with a regular humidity calibrator or with H • Can be connected to Vaisala Insight software for calibration and adjustment, configuration, diagnostics, and temporary online monitoring.

2 O 2 vapor.

• Can be used as a stand-alone probe or with Vaisala Indigo 200 series transmitters.

More Information

Technical Data (page 54)

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.

9

HPP271 User Guide CAUTION!

Do not attempt to open the probe body. There are no user serviceable parts inside the probe body.

M211888EN-C

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 Water concentration by volume H 2 O ppm

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 .

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 .

The probe provides both digital and analog outputs.

More Information

‣ ‣ ‣ ‣

Measurement Data Registers (page 63) Configuration Registers (page 63)

Connectivity to Vaisala Insight Software (page 12)

Setting Probe in Analog or Digital Mode (page 22)

10

Chapter 2 – Product Overview

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.

More Information

Problems and Their Possible Solutions (page 47)

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 O 2 environments. During the purge, H 2 O 2 and H 2 O measurements are not available.

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 O 2 is present or ambient humidity is not steady.

If required, you can also enable purge during H 2 O 2 exposure with the Insight PC software or an Indigo transmitter.

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 28)

Operation in Analog Mode (page 24)

11

HPP271 User Guide M211888EN-C

2.8 Environmental Compensation for Pressure

When necessary, you can apply pressure compensation to improve the measurement accuracy of the probe. 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).

More Information

‣ ‣

Vaisala Insight Software (page 34)

Configuration Registers (page 63)

2.9 Measurement Filtering Factor

You can set a filtering factor that affects the speed at which the latest 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 , Vaisala Insight software, or an Indigo 200 transmitter.

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 63)

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: • 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 34)

12

Chapter 2 – Product Overview

2.11 Additional Features with Indigo Transmitters

HPP271 probes are compatible with Vaisala Indigo 200 transmitters starting from Indigo transmitter software version 1.4.0 or higher. 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 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 Overview (page 29)

13

HPP271 User Guide M211888EN-C

3. H

2

O

2

Measurement 3.1 Operating Principle of H

2

O

2

Measurement

CAUTION!

When there is H is powered off, exposure to H 2 O always be powered on. When powered on, the PEROXCAP sensor is heated, which permits using the probe in condensing H 2 O 2 2 in the probe's environment, the probe must within a day, and the sensor will not recover.

2 O 2 conditions, maintains measurement performance, and lengthens the probe's lifetime. When the probe condensation can break the PEROXCAP sensor 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 sensors indicates the vapor concentration of H 2 2 O O 2 .

2 from the vapor mixture. Therefore, the HUMICAP sensor with this layer only senses water vapor, providing a measurement of partial water pressure. 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 14

1 2 3 H 2 0 2H 2 0 2 A 2H 2 0 0 2 H 2 0 Chapter 3 – H2O2 Measurement H 2 0 2 2 3 B 1 Figure 2 Operating principle of PEROXCAP measurement A B 2 3 HUMICAP sensor with a catalytic layer (under the probe filter). This sensor only senses water vapor.

HUMICAP sensor without a catalytic layer (under the probe filter). This sensor senses the air mixture with both hydrogen peroxide vapor and water vapor.

Catalytic layer over the thin film polymer. This layer catalyzes hydrogen peroxide into water and oxygen and prevents it from entering the sensing polymer.

Thin film polymer between two electrodes.

Alumina substrate.

3.2 Typical Applications

The probe is not intended for safety level measurement.

15

HPP271 User Guide The probe is not intended to be used in vacuum applications.

M211888EN-C 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 containers).

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 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 2 mixture is introduced into the space to be bio decontaminated.

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.

16

H 2 O 2 Concentration More Cycle Phase Less Chapter 3 – H2O2 Measurement

RELATIVE HUMIDITY (RH)

100%

CONDENSATION POINT VAPORIZED HYDROGEN PEROXIDE CONCENTRATION RELATIVE SATURATION (RS)

Humidity 0% Figure 3 Example behavior of H 2 O 2 concentration, relative saturation (RS), and relative humidity (RH) in a vaporized H 2 O 2 bio-decontamination cycle (non-condensing conditions)

In the non-condensing bio-decontamination cycle example shown in Figure 3 (page 17) :

• 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 O 2 vapor and water vapor.

Because the generated H 2 O 2 vapor is typically mixed with water vapor, RH also starts to rise.

• In the • In the

decontamination aeration

phase, H phase, H 2 O 2 2 O 2 concentration is steady. However, RS level rises slowly close to 100 %RS, i.e. condensation point, due to rising RH level.

concentration, RS, and RH all decrease. When H 2 O 2 concentration is zero, RS equals RH.

More Information

Installation (page 18)

17

HPP271 User Guide M211888EN-C

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: • 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 H 2 O 2 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 conditions, maintains measurement performance, and lengthens the probe's lifetime.

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.

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-through on the metal body of the probe.

The figure shows an example installation using Vaisala spare part gland HPP271MOUNTINGSET1.

1 2 Nut for tightening the probe in place Nut for mounting the gland 18

Chapter 4 – Installation

Example: Installation Through a Wall, Flange Option

≤ 4 mm 1 1 The figure shows an example installation using Vaisala spare part flange (HPP271MOUNTINGSET2), including the drilling dimensions for the flange.

Seal the lead-throughs on the metal body of the probes.

Screws for tightening the flange in place (4 pcs, Ø 5 mm) 40 mm Ø 5 mm Ø 2 7 mm

Example: Installation Entirely in Process Environment

Mount the H 2 O 2 and humidity probe from the probe body.

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.

Make sure the signal cable you use is suitable for your bio decontamination process.

5.5 mm Ø 5.5 mm 68 mm 19

HPP271 User Guide M211888EN-C

More Information

‣ ‣ ‣

HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 Dimensions (page 58)

HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 Dimensions (page 59)

HPP272WALLMOUNT Dimensions (page 60)

4.1 Wiring

4 1 3 5 2 Figure 4 Pins on the Probe M12/5 Male Connector

Pin # Function Notes Wire Color

1)

1 2 3 4 5 Power supply 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 With digital output: 15 ... 30 VDC

With analog output: 15 ... 25 VDC 2)

Current output: 4 … 20 mA

Current output: 4…20 mA 3) 3)

Brown 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 self heating.

3) The ordered parameters and scaling are shown in the calibration certificate delivered with the probe.

20

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 5 Wiring Example for Connecting the Probe to a PLC in Analog Mode Probe RS-485 host RS-485 + RS-485 RS-485 common Pin #5 + DC power supply Chapter 4 – Installation Figure 6 Wiring Example for RS-485 Connection (Modbus Communication)

More Information

‣ ‣ ‣

Accessories (page 56)

Triggering Purge in Analog Mode (page 28)

Technical Data (page 54)

21

HPP271 User Guide M211888EN-C

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.

4 1 3 5 2 Figure 7 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.

22

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 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 8½ minute 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 23)

5.2 Behavior at Exposure to H

2

O

2 CAUTION!

When there is H 2 always be powered on. When powered on, the PEROXCAP sensor is heated, which permits using the probe in condensing H measurement performance, and lengthens the probe's lifetime. When the probe is powered off, exposure to H 2 O 2 O 2 in the probe's environment, the probe must within a day, and the sensor will not recover.

2 O 2 conditions, maintains condensation can break the PEROXCAP sensor When the bio-decontamination process starts and the probe is exposed to H 2 O 2 , the probe's H 2 O 2 concentration reading changes to > 0 ppm after approximately 20 ... 30 seconds. This time is included in the response time of the probe.

5.3 H

2

O

2

Concentration Reading When Not Exposed to H

2

O

2 The PEROXCAP sensor consists of two humidity sensors that have a minor difference in behavior when the humidity level changes. Because of this difference, the H 030C hex any reading < 3 ppm is clipped to show 0 ppm.

2 O 2 concentration reading may vary slightly (typically 0 … 3 ppm) when the probe is not exposed to H 2 O 2 . This variation is normal and does not require any actions. If needed, you can hide the variation by setting a low clipping limit with the Vaisala Insight software, Modbus configuration register , or an Indigo 200 transmitter. For example, if you set the low clipping limit to 3 ppm, 23

HPP271 User Guide M211888EN-C

More Information

‣ ‣

Vaisala Insight Software (page 34)

Configuration Registers (page 63)

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.

More Information

‣ ‣ ‣

Modbus Reference (page 61)

Setting Probe in Analog or Digital Mode (page 22)

Wiring (page 20)

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 self heating 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 22)

Analog Output Error State (page 53)

Configuration Registers (page 63)

Chemical Purge (page 11)

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.

24

Chapter 5 – Operation 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.

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 8 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 53)

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 20.8 mA. If the H 2 O 2 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 concentration rises above 2100 ppm, the output still remains at 20.8 mA.

If the H 2 O 2 concentration rises above 2200 ppm, the output enters the error state (by default, 3.6 mA).

25

HPP271 User Guide Output signal, mA 20.8

20 Clipping limit High end of scale M211888EN-C 4 3.6

Error level 0 2000 2100 2200 Measured H2O2 concentration, ppm Analog signal Figure 9 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 20.8 mA. If the H 2 O 2 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 concentration rises above 2100 ppm, the output still remains at 20.8 mA.

26

Chapter 5 – Operation Output signal, mA 20.8

20 Clipping limit High end of scale 4 3.6

0 2000 2100 Measured H2O2 concentration, ppm Analog signal Figure 10 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).

27

HPP271 User Guide Output signal, mA 21.6

20 Error limit High end of scale M211888EN-C 4 3.6

Error level 0 2000 2200 Measured H2O2 concentration, ppm Analog signal Figure 11 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 Figure 5 (page 21)

.

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, H 2 O 2 and H 2 O measurements are not available

More Information

Chemical Purge (page 11)

28

Chapter 5 – Operation

5.6 Using Probe with Indigo Transmitters

5.6.1 Indigo Overview

1 2 3 4 5 1 2 3 4 5 3.5” TFT LCD color display: non-display option with LED available for certain models.

Cable locking wheel: insert cable, hold in place, and turn the wheel counterclockwise.

Wireless configuration interface (WLAN) activation button.

Rubber lead-through with strain relief. Cable feedthrough option also at back of transmitter.

Input/output cable.

The probe can be connected to Vaisala Indigo transmitters by using a cable.

29

HPP271 User Guide M211888EN-C 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.

30

5.6.2 Attaching Probes

Chapter 5 – Operation Figure 12 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.

31

HPP271 User Guide M211888EN-C

5.6.3 Connecting to Wireless Configuration Interface

1 2 435 ppm

H2O2

7124 ppm

H2O Indigo 201  

WLAN is activated 3

Select WLAN to connect to:

1. WLAN XYZ

2. Indigo_ID[xx]

3. WLAN ABC Figure 13 Enabling and Accessing Indigo's Wireless Configuration Interface 1 2 3 Wireless connection activation button Wireless connection indicator (WLAN symbol) on the Indigo display 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.

32

Chapter 5 – Operation

5.6.4 Logging in to Wireless Configuration Interface

Figure 14 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.

33

HPP271 User Guide M211888EN-C

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) Figure 15 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.

4. Wait for Insight software to detect the probe.

34

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 it.

H 2 O 2 probe body

by wiping it 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 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.

35

HPP271 User Guide M211888EN-C

More Information

‣ ‣

Chemical Purge (page 11)

Triggering Purge in Analog Mode (page 28)

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 34)

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.

36

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

HPP271 has the following field calibration and adjustment options: • H • H 2 2 O O 2 2 measurement calibration and adjustment with relative humidity (RH) references (for example, Vaisala HMK15 Humidity Calibrator) measurement calibration and adjustment in H 2 O 2 vapor 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 H 2 2 O O 2 2 measurement. Because the H measurement.

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 37

HPP271 User Guide M211888EN-C H 2 O 2 Adjustment in H 2 O 2 Vapor You can also calibrate and adjust the probe directly in H 2 O 2 vapor. Note that calibration in H 2 O 2 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.

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 Vaisala algorithm Sensor with catalytic layer:

H 2 O

Sensor without catalytic layer:

H 2 0, H 2 O 2

Figure 16 PEROXCAP Operating Principle Vaisala algorithm transforms the observations from the humidity sensors into a measurement reading of H 2 O 2 concentration. Any drift in the humidity sensors shows as drift in the measurement reading. Therefore, removing the drift from the humidity sensors with calibration and adjustment improves H 2 O 2 measurement performance.

38

Chapter 7 – Maintenance Sensor with ca 0 + accuracy for field adjustment Adjustment removes drift from sensors.

Figure 17 Adjustment removes drift 0 + accuracy for field adjustment Drift is also removed from measurement.

Even though the probe does not measure relative humidity during normal operation, you can still calibrate and adjust the probe's H condensing H 2 O 2 sensors. During RH for H 2 O 2 2 O 2 measurement with relative humidity. 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 that temporarily turns off the sensor heating.

2 O 2 and in certain measurement calculations. In normal measurement, the PEROXCAP sensor is heated to allow it to be used in conditions, which sets limitations for the use of the internal temperature calibration, however, the probe switches into a calibration mode 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 break the PEROXCAP sensor within a day, and the sensor will not recover.

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.

39

HPP271 User Guide M211888EN-C 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 break the PEROXCAP sensor 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 34)

.

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

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

step 7 … step 9

for calibration point 2 (wet point, recommendation 65 … 85 %RH).

11. Select

Activate adjustment > Yes

to store the adjustment in the probe.

12. 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.

13. Select the

Calibration information

tab and update the

Calibration date

and

Calibration text

.

14. Select

Close > Yes

to exit the calibration mode.

40

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 break the PEROXCAP sensor 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 31) ).

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

from the

Calibration mode

dropdown.

41

HPP271 User Guide M211888EN-C 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

step 7 … step 9

for calibration point 2 (wet point, recommendation 65 … 85 %RH).

11. Select

Activate adjustment

to store the adjustment in the probe.

12. Close the calibration mode with the

Stop calibration

button.

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 installed (Insight software is available for download at 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 http:// www.vaisala.com

).

• Vaisala USB cable 242659 for connecting the probes.

42

Chapter 7 – Maintenance 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 to H 2 O 2 vapor.

RH and T

calibration mode (default mode), the sensor heating is switched off and the sensor will not withstand exposure 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 O 2 concentration to reach the desired calibration and adjustment level.

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.

11. Check the difference between the H unsuitable calibration setup.

2 O 2 concentration readings of your probe and the reference probe. A very large difference may be due to insufficient stabilization time or 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.

43

HPP271 User Guide M211888EN-C

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

Attaching Probes (page 31)

).

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

calibration mode (default mode), the sensor heating is switched off and the sensor will not withstand exposure to H 2 O 2 vapor.

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 2 O 2 readings of both probes and allow the measurements to stabilize fully.

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.

44

Chapter 7 – Maintenance 9. Select

Activate adjustment

to store the adjustment in the probe.

10. 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.

Figure 18 Setting Current Level for Analog Output Test in Insight Software 1. Connect the probe to Insight. See

Connecting to Insight Software (page 34) .

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.

45

HPP271 User Guide M211888EN-C 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 (page 47)

.

46

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

Status Registers (page 70) ).

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 12)

Vaisala Insight Software (page 34)

Configuration Registers (page 63)

47

HPP271 User Guide M211888EN-C

Measurement reading does not change during regular use for less than 5 minutes

Problem: Measurement 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.

Measurement reading does not change during regular use for more than 5 minutes.

Problem: Measurement 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 34)

).

Check the probe diagnostics with the Insight software (see

Vaisala Insight Software (page 34)

measurement scale.

).

Consider changing the analog output error level to be outside the

Measurement reading appears incorrect

Problem: Measurement reading appears incorrect.

Possible Cause:

The filter is wet.

The filter is blocked or dirty.

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.

Change the filter.

Be careful not to touch the sensors when the filter is off the probe.

48

Chapter 8 – Troubleshooting

Problem: Measurement reading appears incorrect.

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.

When the probe is powered off, exposure to H can break the PEROXCAP sensor within a day, and the sensor will not recover. When the probe is powered on, the heated sensor withstands condensing H 2 O 2 conditions.

2 O 2 condensation A sensor damaged with H 2 O 2 condensation during power-off time cannot be repaired.

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 (page 36) .

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.

If the reading remains > 0 ppm for 2 ... 10 hours, H 2 O 2 concentration has drifted.

Solution:

No actions required.

The intelligent measurement algorithm can correct errors of < 30 ppm by itself when the probe is not exposed to H and RH, not exposed to H 2 O 2 .

2 O 2 . Keep the probe powered on for a few hours in a stable temperature 49

HPP271 User Guide M211888EN-C

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.

Probe wiring is incorrect.

The probe cable is not properly connected.

The operating voltage is incorrect.

Check the probe wiring and correct it if needed. See (page 20) .

Check the cable connection and correct it if needed.

Wiring

Check the operating voltage and correct if needed. See input and output specifications for the correct voltage.

50

Chapter 8 – Troubleshooting

Problem: The probe does not power on, or there is no communication from the probe after power-on.

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 communication settings. You can check the probe's communication settings with the Insight software. See

Vaisala Insight Software (page 34)

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 SW release, or contact Vaisala Support for earlier SW versions.

for the latest Insight

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.

Probe wiring is incorrect.

The operating voltage is incorrect.

The probe cable is not properly connected.

Solution:

Check pin #5. See Wiring (page 20)

.

Check the analog output mode with the Insight software or Modbus configuration registers 0700 hex and 0800 hex . See: • •

Vaisala Insight Software (page 34)

Configuration Registers (page 63)

Check the probe wiring and correct it if needed. See

Wiring (page 20)

.

Check the operating voltage and correct if needed. See input and output specifications for the correct voltage.

Check the cable connection and correct it if needed.

Power input to the probe is off. Turn on the power input.

51

HPP271 User Guide M211888EN-C

Problem: In analog mode, there is no output signal (signal level is 0 mA).

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 Software (page 34)

).

Vaisala Insight

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

Wiring (page 20) .

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: Solution:

52

Chapter 8 – Troubleshooting

Problem: At start-up in analog mode, the probe remains in the error state for over 5 minutes.

The analog output scaling is unsuitable.

Check the analog output scaling with the Insight software and

correct the scaling if needed (see Vaisala Insight Software (page 34) ).

There is a probe or sensor error. Check the probe diagnostics with the Insight software (see

Vaisala Insight Software (page 34)

).

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 63)

53

HPP271 User Guide M211888EN-C

9. Technical Data

HPP271

Table 5 Measurement Performance

Property 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 Factory calibration uncertainty, at +25 °C (+77 °F), 500 ppm H 2 O 2 1 Response time at +23 °C (+73 °F): Response time (T 63 ) Response time (T 90 )

Other Parameters

H 2 O ppm by volume

Description/Value

PEROXCAP â 0 ... 2000 ppm +5 ... +50 °C (+41 ... +122 °F) ±10 ppm ±15 ppm ±10 ppm or 5 % of reading (whichever is greater) ±10 ppm 70 s 200 s

1) Defined as ±2 standard deviation limits. See also calibration certificate.

54

Chapter 9 – Technical Data 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 Figure 19 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 55

HPP271 User Guide

Property

Max. load Accuracy Analog output temperature dependence

Description/Value

500 Ω ±0.1 % of full scale 0.005 %/˚C (0.003 %/°F) full scale Table 7 Operating Environment

Property

Operating temperature Storage temperature Ambient pressure EMC compliance Table 8 Mechanical Specifications

Property

Weight IP rating Connector

Materials

Probe body Filter cap

Description/Value

+0 ... +70 °C (+32 ... +158 °F) -20 ... +70 °C (-4 ... +158 °F) Normal atmospheric pressure EN/IEC 61326-1, Industrial Environment

Description/Value

110 g (3.88 oz) IP65 M12/5 male AISI316L stainless steel Porous PTFE

9.1 Accessories

Table 9 Spare Parts and Accessories

Name

USB cable for PC connection

1)

Probe cable with open wires (1.5 m) Probe cable with open wires (3 m) Probe cable with open wires (5 m) Probe cable with open wires (10 m) Probe cable with open wires and 90° plug (0.6 m)

Order Code

242659 254294SP 254295SP 254296SP 254297SP 244669SP M211888EN-C 56

Chapter 9 – Technical Data

Name

Filter Gland set for through-wall installation, HPP271 Flange for through-wall installation, HPP271 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)

1)

Order Code

DRW246363SP HPP271MOUNTINGSET1 HPP271MOUNTINGSET2 HPP272WALLMOUNT See www.vaisala.com/indigo INDIGOCABLEHD1M5 INDIGOCABLEHD3M INDIGOCABLEHD5M INDIGOCABLEHD10M

Vaisala Insight software for Windows available at www.vaisala.com/insight

For more information on ordering spare parts and accessories, see http:// store.vaisala.com

.

9.2 Dimensions

118.3

22 Ø=16/18.5

44 Ø=18.5 Figure 20 HPP271 Dimensions 38.5

Ø=30 mm

More Information

‣ ‣

HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 Dimensions (page 58)

HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 Dimensions (page 59)

57

HPP271 User Guide M211888EN-C

9.2.1 HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 Dimensions

Figure 21 (page 58) shows the dimensions of the gland through-wall installation accessory

HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 in millimeters and [inches].

For an installation example, see

Installation (page 18)

.

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 12 [0.47] Ø 5 [0.196] 14 [0.55] 24 [0.94]

Figure 21 HPP271MOUNTINGSET1/HPP272MOUNTINGSET1 Dimensions

mm [in]

For more information on using the gland through-wall installation accessory, see the accessory Quick Guide

M212195EN

.

More Information

Installation (page 18)

58

Chapter 9 – Technical Data

9.2.2 HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 Dimensions

Figure 22 (page 59) shows the dimensions of the flange through-wall installation accessory

HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 in millimeters and [inches].

For an installation example, see Installation (page 18) .

10 [0.39] Ø 60 [2.36] M4 Ø 18.7 [0.74] Ø 8 [0.31] Ø 12 [0.47] Ø 12 [0.47] Ø 5 [0.196] 14 [0.55] 24 [0.94]

Figure 22 HPP271MOUNTINGSET2/HPP272MOUNTINGSET2 Dimensions

mm [in]

For more information on using the flange through-wall installation accessory, see the accessory Quick Guide

M212194EN

.

More Information

Installation (page 18)

59

HPP271 User Guide M211888EN-C

9.2.3 HPP272WALLMOUNT Dimensions

Figure 23 (page 60)

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 23 HPP272WALLMOUNT Dimensions For more information on using the wall mounting accessory, see the accessory Quick Guide

M212179EN

.

mm [in]

More Information

Installation (page 18)

60

Appendix A – Modbus Reference

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

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.

A.3.1 32-Bit Floating Point or Integer Format

Least significant 16 bits of floating point or integer numbers are placed at the smaller Modbus address as specified in Open Modbus TCP Specification, Release 1.0. This is also known as "little-endian" or "Modicon" word order. Floating point values are represented in standard IEEE 32-bit floating point format.

61

HPP271 User Guide M211888EN-C Despite the specification, some Modbus masters may expect "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 "quiet NaN" value is returned for unavailable values. A quiet NaN is, for example, 7FC00000 hex ; however, the master should understand any NaN value.

A complete 32-bit floating point or integer value should be read and written in a single Modbus transaction.

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 16-bit Signed Integer Format Details

Value

0000 hex … 7FFE hex 8002 hex … FFFF hex 8000 hex

Description

Value in range 0 … 32766 Value in range -32766 … -1 (2’s complement) Value is not available (quiet NaN) Some values may exceed the signed 16-bit range even in normal operation. To access such values, use the floating point registers instead.

A.4 Modbus Registers

CAUTION!

addresses in actual Modbus messages (Modbus Protocol Data Unit (PDU)) start from zero.

Registers are numbered in decimal, starting from one. Register Please check the reference documentation of your Modbus host (PLC) for the notation of Modbus register addresses.

Accessing unavailable (temporarily missing) measurement data does not generate an exception. “Unavailable” value (a quiet NaN for floating point data or 0000 register ranges.

hex for integer data) is returned instead. An exception is generated only for any access outside the applicable 62

Appendix A – Modbus Reference

A.4.1 Measurement Data Registers

Table 13 Modbus Measurement Data Registers (Read-Only) 1

Register Number (Decimal) Address (Hexadecimal)

0000 hex

Register Description

15 257 000E 0100 hex hex Vaporized hydrogen peroxide concentration by volume Water concentration by volume Vaporized hydrogen peroxide concentration by volume 264 0107 hex Water concentration by volume

Data Format Unit

32-bit float ppm 32-bit float ppm 16-bit signed integer 16-bit signed integer ppm ppm

A.4.2 Configuration Registers

CAUTION!

Default power-up values (register 773) are written into non-volatile 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 (register 769, 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

773 0304 hex 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 ).

Power-up value for pressure compensation

Data Format Unit / Valid Range

32-bit float hPa 813.25 ... 1213.25

(default 1013.25 hPa) (Init copied from power up value) 32-bit float hPa 813.25 ... 1213.25

(default 1013.25 hPa) 63

HPP271 User Guide M211888EN-C

Register Number (Decimal)

777

Address (Hexadecimal)

0308 hex 779 781 030A 030C hex hex

Register Description Data Format Unit / Valid Range

Purge interval Measurement filtering factor (affects only H 2 O 2 concentration measurement) Low H 2 O 2 clipping limit 16-bit integer min 60 ... 10080 (= 1 hour ... 1 week) (default: 1440 (= 24 hours)) 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.

32-bit float ppm Any numerical value (default: 0) 64

Appendix A – Modbus Reference

Register Number (Decimal)

1283 1285 1287 1288 1537 1538

Address (Hexadecimal) Register Description

0502 hex 0504 0506 0507 0600 0601 hex hex hex hex hex Purge status / manual start Pressure compensation on/off Manual purge trigger in analog mode on/off Allow interval purge during H Bit rate 2 O 2 exposure Modbus address

Data Format

16-bit function status 16-bit boolean 16-bit boolean 16-bit boolean 16-bit integer 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 (page 47) .

1 = On 0 = Off 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) 65

HPP271 User Guide M211888EN-C

Register Number (Decimal)

1539

Address (Hexadecimal)

0602 hex 1540 1541 0603 0604 hex hex

Register Description

Parity, number of data bits, number of stop bits Response delay Restart device

Data Format

enum 16-bit integer 16-bit function status

Unit / Valid Range

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 1794 1795 1797 1799 0701 0702 0704 0706 hex hex hex hex Output parameter Scale low end Scale high end Error output enum 16-bit register address 0 = Off 2 = 4 ... 20 mA (default: 2 = 4 ... 20 mA) 0000 hex or 000E hex

See Table 13 (page 63)

for measurement register descriptions.

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 66

Register Number (Decimal)

1801

Address (Hexadecimal) Register Description

0708 hex Low clipping limit 1803 1805 1807

Analog Output 2:

2049 2050 070A 070C 070E 0800 0801 hex hex hex hex hex Low error limit High clipping limit High error limit Output mode Output parameter 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 enum 16-bit register address 0 = Off 2 = 4 ... 20 mA (default: 2 = 4 ... 20 mA) 0000 hex or 000E hex See

Table 13 (page 63)

for measurement register descriptions.

67

HPP271 User Guide

Register Number (Decimal)

2051

Address (Hexadecimal)

0802 hex

Register Description

Scale low end 2053 2055 2057 2059 2061 0804 0806 0808 080A 080C hex hex hex hex hex Scale high end Error output Low clipping limit Low error limit High clipping limit M211888EN-C

Data Format Unit / Valid Range

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 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 68

Appendix A – Modbus Reference

Register Number (Decimal)

2063

Service Agreement:

2817 2829 2841 2844 7937

Address (Hexadecimal) Register Description

080E hex 0B00 0B0C 0B18 0B1B

Factory Settings:

1E00 hex hex hex hex hex High error limit

Data Format Unit / Valid Range

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 Customer name Contract number Start date End date 24 character ASCII string 24 character ASCII string three 16-bit integer decimal values (YYYY, M, and D) three 16-bit integer decimal values (YYYY, M, and D) Read-only Read-only Read-only Read-only 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.

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A.4.3 Status Registers

Table 15 Modbus Status Registers (Read-Only)

Register Number (Decimal)

513

Address (Hexadecimal)

0200 hex

Register Description

514 516 529 536 547 0201 0203 0210 0217 0222 hex hex hex hex hex

Data Format Notes

Device status Status code low Status code high 16-bit 32-bit 32-bit Status of Hydrogen peroxide concentration by volume Status of Water concentration by volume Sensor Vitality 16-bit 16-bit 32-bit float 0 = Status OK.

1 = Critical error, maintenance needed.

2 = Error, device may recover automatically.

4 = Warning.

8 = Notification.

16 = Calibration enabled.

1) See Table 16 (page 70) .

1)

See Table 17 (page 71) .

1)

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

1)

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.

Table 16 Error Codes in Register 0201 hex (32-bit)

Value of Register 0201 hex

0

Error Message

Status OK.

Severity

70

Appendix A – Modbus Reference

Value of Register 0201 hex

1 2 8 16 32 64 1024 16384 32768 262144 524288

Error Message

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).

Table 17 Error Codes in Register 0203 hex (32-bit)

Value of Register 0203 hex

0 256 512 4096 8192 16384 32768 65536

Error Message

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.

A.4.4 Device Identification Objects

Table 18 Device Identification Objects

Object Id (Decimal)

0

Object Id (Hexadecimal)

00 hex

Object Name

VendorName

Example Contents

“Vaisala”

Severity

Critical Critical Error Error Error Error Error Error Error Error Error

Severity

Error Error Error Info Error Info Warning 71

HPP271 User Guide M211888EN-C 3 4 1 2

Object Id (Decimal)

128 129 130

Object Id (Hexadecimal)

01 02 03 04 80 hex hex hex hex hex 81 hex 82 hex

Object Name

ProductCode MajorMinorVersion Software version (for example “1.2.3”) VendorUrl “http://www.vaisala.com/” ProductName

SerialNumber 1) CalibrationDate 1)

CalibrationText

1)

“HPP271” "Hydrogen peroxide probe HPP271" Serial number of the device (for example “K0710040”) Calibration date Calibration information text

1) Vaisala-specific device identification object.

Example Contents

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" 72

Appendix A – Modbus Reference

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)

(silence for 3.5 bytes) F0 03 hex hex

Description

Start of Modbus RTU frame HPP271 address Function (Read Holding Registers) Register address 00 hex 00 hex 00 hex 02 hex D1 hex 2A hex (silence for 3.5 bytes) Number of 16-bit registers to read (2) Modbus RTU checksum End of Modbus RTU frame

Response Bytes on the Line (Hexadecimal)

(silence for 3.5 bytes) F0 03 04 D4 7A hex hex hex hex hex 43 hex E8 hex 33 hex AB hex

Description

Start of Modbus RTU frame HPP271 address Function (Read Holding Registers) Number of data bytes 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).

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Writing Purge Interval Value

M211888EN-C

Communication Description

Register address Data format 74 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.

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.

Communication Description

Value to write Appendix A – Modbus Reference 0B40 hex = 2880 (minutes) (= 48 hours) 75

HPP271 User Guide M211888EN-C 76

Warranty

For standard warranty terms and conditions, see warranty for each product.

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

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.

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HPP271 User Guide M211888EN-C 78

www.vaisala.com

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