Vaisala Indigo 202 User manual

M211966EN-D
User Guide
Digital transmitter with WLAN configuration
interface
Indigo 202 (WLAN interface)

PUBLISHED BY
Vaisala Oyj
Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland
P.O. Box 26, FI-00421 Helsinki, Finland
[phone]
Visit our Internet pages at www.vaisala.com.
© Vaisala Oyj 2022
No part of this document may be reproduced,
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applicable, not the translations.
The contents of this document are subject to
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shall take precedence over the information
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representations on this document’s compliance
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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
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This product may contain open source software
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contains OSS components, then such OSS is
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included in the product itself or provided to you
on any other applicable media, depending on
each individual product and the product items
delivered to you.

Table of contents
1. About This Document......................................................................................7
1.1 Version Information.............................................................................................7
1.2 Related Manuals...................................................................................................7
1.3 Documentation conventions..............................................................................8
1.4 Trademarks...........................................................................................................8
2. Product Overview............................................................................................. 9
2.1 Introduction to Indigo Transmitters.................................................................. 9
2.2 Indigo 202 Basic Features and Options..........................................................10
2.3 Indigo Transmitter Parts.....................................................................................11
2.4 Probe Compatibility...........................................................................................12
2.4.1 Probe and Indigo Software Compatibility................................................ 12
2.5 Indigo Display.....................................................................................................13
2.5.1 Graph Display Mode.................................................................................... 14
2.5.2 Measurement Reading Locked...................................................................15
2.6 Wireless configuration interface overview..................................................... 16
3. Installation.......................................................................................................... 17
3.1 Opening and Mounting......................................................................................17
3.2 Indigo Transmitter Base.................................................................................... 18
3.3 Wiring Options................................................................................................... 19
3.4 Attaching Probes and Cables..........................................................................20
3.5 Input and Output Specification........................................................................ 21
3.6 WLAN and RS-485 Termination OFF/ON DIP Switches...............................22
4. Wireless Configuration Interface............................................................. 24
4.1 Wireless Interface Menus................................................................................. 24
4.2 Connecting to wireless configuration interface............................................ 25
4.2.1 Connecting with a Computer.................................................................... 25
4.2.2 Connecting with a Mobile Device............................................................. 26
4.3 Logging in to wireless configuration interface.............................................. 27
4.3.1 Changing User Level...................................................................................28
4.3.2 Changing Administrator Password...........................................................28
4.3.3 Resetting Administrator Password...........................................................29
4.4 Measurements View......................................................................................... 30
4.5 Status View......................................................................................................... 31
4.5.1 Status View: General.................................................................................. 32
4.5.2 Status View: Relays.....................................................................................32
4.6 Calibration Menu............................................................................................... 33
4.7 General Settings................................................................................................33
4.7.1 Date and Time.............................................................................................34
4.7.2 WLAN Settings........................................................................................... 34
4.7.3 User Access Settings (Administrator Password)....................................34
4.7.4 Display Settings.......................................................................................... 35
4.7.5 Factory Reset.............................................................................................. 36
4.7.6 License Information....................................................................................36
4.8 Modbus Serial Communication Settings........................................................ 37
4.9 Relay Settings....................................................................................................38
4.10 Probe Settings...................................................................................................39
5. Modbus................................................................................................................42
5.1 Modbus Overview............................................................................................. 42
5.1.1 Default Communication Settings............................................................. 43
Table of contents
3

6. Configuring Relays.........................................................................................44
6.1 Relay Configuration Overview........................................................................ 44
6.2 Setting Relay Activation Limit Without Hysteresis.......................................45
6.3 Setting Relay Activation Limit Using Hysteresis...........................................46
6.4 Selecting Relay Error State.............................................................................. 47
7. Calibration and Adjustment....................................................................... 48
7.1 Calibration Overview........................................................................................48
7.1.1 Starting and Closing Calibration Mode....................................................49
7.1.2 Restoring Factory Adjustment................................................................. 50
7.1.3 Calibration PIN Code................................................................................... 51
7.2 Environmental Compensation.......................................................................... 51
7.3 Measurements Tab............................................................................................54
7.4 Diagnostics Tab................................................................................................. 54
7.5 Configuration Tab..............................................................................................55
7.6 GMP252 Example: 2-point CO2Adjustment.................................................. 56
8. Maintenance and Troubleshooting.......................................................... 59
8.1 Cleaning............................................................................................................. 59
8.2 Indigo Wireless Connection Troubleshooting............................................... 59
8.3 Calibration Mode Troubleshooting.................................................................60
8.4 Additional WLAN Settings when Connecting to Indigo..............................60
8.4.1 Connection Option 1: Use Without Internet (iPhone example)..............61
8.4.2 Connection Option 2: Disable Auto-Login (iPhone Example).............. 62
8.5 Display Messages.............................................................................................. 63
9. Technical Data..................................................................................................65
9.1 Specifications.................................................................................................... 65
9.2 Spare Parts and Accessories............................................................................67
9.3 Dimensions........................................................................................................ 68
Appendix A: Modbus Reference.................................................................. 69
A.1 Function Codes................................................................................................. 69
A.1.1 Device identification objects.....................................................................69
A.2 Indigo Status Registers.................................................................................... 70
A.2.1 Notification and Error Bits.........................................................................70
EU Declaration of Conformity....................................................................... 73
Warranty.............................................................................................................74
Technical support............................................................................................. 75
Recycling............................................................................................................ 75
Indigo 202 (WLAN interface) User Guide M211966EN-D
4

List of figures
Figure 1 Probe Connection Options and Wireless Interface
Examples (GMP251 Example).......................................................................... 9
Figure 2 Indigo Transmitter Parts................................................................................... 11
Figure 3 Indigo Display with One Parameter .............................................................13
Figure 4 Indigo Display with Relays, Three Parameters and WLAN
Notification..........................................................................................................13
Figure 5 Indigo Display in Graph Mode........................................................................14
Figure 6 Purge in Progress Message from Probe on Indigo Display.................... 15
Figure 7 Desktop and mobile example views.............................................................16
Figure 8 Indigo 202 Transmitter Base Main Parts and Screw Positions..............18
Figure 9 Indigo Wiring Options......................................................................................19
Figure 10 Attaching Probes and Cables to Indigo..................................................... 20
Figure 11 WLAN and RS-485 DIP Switches on Indigo 202 Circuit Board............22
Figure 12 Wireless Configuration Interface, Desktop Browser View.....................24
Figure 13 Enabling and accessing wireless configuration interface of
Indigo 200.......................................................................................................... 25
Figure 14 Indigo login view...............................................................................................27
Figure 15 User Level (User/Admin) in Upper Right Corner of Menu View...........28
Figure 16 Measurements View (Desktop Browser)....................................................30
Figure 17 Latest Values Tab, H2O2Probe Example (Desktop Browser)...............30
Figure 18 Status View (CO2Probe Example, Desktop Browser).............................31
Figure 19 Calibration Menu (CO2Probe Example, Desktop Browser).................. 33
Figure 20 Relay Configuration Options (CO2Probe Example)...............................44
Figure 21 Relay Icons on the Optional Display (Relay A Active, Relay
B Not Active)......................................................................................................45
Figure 22 Calibration Menu Main View.......................................................................... 48
Figure 23 Start Calibration Button..................................................................................49
Figure 24 Probe Heating Options in Configuration Tab............................................50
Figure 25 Measurement Selections, CO2Probe Example......................................... 52
Figure 26 Compensation Setpoint and Power-Up Default Selection,
CO2Probe Example..........................................................................................53
Figure 27 Measurements Tab, CO2Probe Example....................................................54
Figure 28 Diagnostics Tab, CO2Probe Example..........................................................55
Figure 29 Configuration Tab, CO2Probe Example..................................................... 56
Figure 30 Additional Steps Needed to Connect Notification...................................61
Figure 31 Indigo Transmitter Dimensions in Millimeters (mm)...............................68
List of figures
5

List of tables
Table 1 Document Versions (English)............................................................................. 7
Table 2 Indigo 200 Series Transmitter and Probe Software Version
Compatibility..........................................................................................................12
Table 3 Inputs and Outputs...............................................................................................21
Table 4 Indigo 202 Modbus Registers.......................................................................... 42
Table 5 Default Modbus Serial Communication Settings........................................ 43
Table 6 Indigo Transmitter Messages Shown on Display.........................................63
Table 7 Inputs and Outputs............................................................................................. 65
Table 8 General....................................................................................................................65
Table 9 Standards and Compliance...............................................................................66
Table 10 Wireless Access Point (Module With Internal Chip Antenna).................66
Table 11 Operating and Storage Environment.............................................................66
Table 12 Mechanics...............................................................................................................67
Table 13 Spare Parts and Accessories.............................................................................67
Table 14 Supported Function Codes...............................................................................69
Table 15 Device identification objects............................................................................69
Table 16 Modbus Status Registers (Read-Only)..........................................................70
Table 17 Bits in Register E001hex......................................................................................70
Indigo 202 (WLAN interface) User Guide M211966EN-D
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1. About This Document
1.1 Version Information
This document provides detailed instructions for using and maintaining Vaisala Indigo 202
digital transmitter.
Table 1 Document Versions (English)
Document Code Date Description
M211966EN-D Jun 2022 This document. Added information on the requirement to disable probe
heating to enable calibration input in certain probe models. Updated
operating environment requirements.
M211966EN-C Oct 2018 Previous version.
• Power supply input specification changed from 15 ... 30 VDC (20 ... 22
VAC) to 15 … 30 VDC (24VAC ±10 % 50/60 Hz) due to component
board update.
• Updated the information on disabling autologin and other additional
WLAN settings when connecting to Indigo wireless configuration
interface.
•Clarified the user level requirements (admin login required) for
configuring settings.
• Updated probe compatibility information.
• Probe locking wheel color changed.
M211966EN-B Dec 2017 User interface updates in place from transmitter software version 1.3.0
onwards.
•Measurements view updated to include graph display on/o selection
and numerical measurements tab.
• Date and time configuration added to the Settings > General menu.
• Updated transmitter cover opening instructions.
• Updated probe compatibility information.
• Added information on the display measurement reading behavior
during probe processes.
1.2 Related Manuals
Document Code Name
M211967EN Indigo 202 Digital Transmitter Quick Guide
M211877EN Indigo 201 Analog Output Transmitter User Guide
M211876EN Indigo 201 Analog Output Transmitter Quick Guide
M211799EN Vaisala CARBOCAPâCarbon Dioxide Probe GMP251 User Guide
M211897EN Vaisala CARBOCAPâCarbon Dioxide Probe GMP252 User Guide
M211972EN Vaisala PEROXCAPâHydrogen Peroxide, Humidity and Temperature Probe HPP272 User
Guide
Chapter 1 – About This Document
7

Document Code Name
M212022EN Vaisala HUMICAPâHumidity and Temperature Probes HMP4, HMP5, HMP7, HMP8, TMP1
User Guide
1.3 Documentation conventions
alerts you to a serious hazard. If you do not read and follow instructions
carefully at this point, there is a risk of injury or even death.
WARNING!
warns you of a potential hazard. If you do not read and follow instructions
carefully at this point, the product could be damaged or important data could be lost.
CAUTION!
Note highlights important information on using the product.
Tip gives information for using the product more eciently.
1.4 Trademarks
Vaisalaâis a registered trademark of Vaisala Oyj.
Indigo™is a trademark of Vaisala Oyj.
Chrome™is a trademark of Google Inc.
Firefoxâis a registered trademark of Mozilla Foundation.
Microsoftâ, Windowsâ, Internet Explorerâ, and Edgeâare either registered trademarks or
trademarks of Microsoft Corporation in the United States and/or other countries.
Safari™is a trademark of Apple Inc, registered in the U.S. and other countries.
All other product or company names that may be mentioned in this publication are trade
names, trademarks, or registered trademarks of their respective owners.
Indigo 202 (WLAN interface) User Guide M211966EN-D
8

2. Product Overview
2.1 Introduction to Indigo Transmitters
1.35
% | Carbon dioxide
WLAN is activated


Indigo 202
Figure 1 Probe Connection Options and Wireless Interface Examples (GMP251 Example)
Vaisala Indigo transmitters are a plug-and-play host device platform for Vaisala Indigo-
compatible probes. Indigo transmitters extend the feature set of connected probes with a
range of additional options for outputs, measurement viewing, status monitoring, and
configuration interface access.
Depending on the Indigo transmitter 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.
Probes can be connected either directly on the transmitter from the probe's connector, or by
using a cable between Indigo and the probe.
The configuration interface of Indigo transmitters is a browser-based wireless UI that
requires a mobile device or computer that supports wireless connectivity (IEEE 802.11 b/g/n
WLAN).
The Indigo 202 transmitter is designed for digital output applications. The transmitter's
output options include RS-485 Modbus RTU and 2 programmable relays.
For more information on Indigo transmitter models, see www.vaisala.com/indigo.
More information
‣Indigo 202 Basic Features and Options (page 10)
‣Specifications (page 65)
Chapter 2 – Product Overview
9

2.2 Indigo 202 Basic Features and
Options
• All Vaisala Indigo-compatible probes can be connected to all Indigo transmitter models
• Wireless configuration interface: connect to the scalable browser-based UI of Indigo
202 to change probe and transmitter settings, view measurements, and review probe
and transmitter status
• 3.5” TFT LCD color display
• Power supply input 15 ... 30 VDC (24VAC ±10 % 50/60Hz)
• Digital output: RS-485 Modbus RTU
• 2 configurable relays
• 1-m, 3-m, 5-m and 10-m probe connection cables available as accessories
More information
‣Wireless Interface Menus (page 24)
‣Indigo Display (page 13)
‣Input and Output Specification (page 21)
‣Modbus Overview (page 42)
‣Relay Configuration Overview (page 44)
Indigo 202 (WLAN interface) User Guide M211966EN-D
10

2.3 Indigo Transmitter Parts
3
4
6
5
1
2
Figure 2 Indigo Transmitter Parts
1Display
2Probe and probe cable connector, locking wheel
3Wireless (WLAN) configuration interface activation button
4Rubber lead-through with strain relief for input/output cable
5Top cover of the transmitter: display, circuit board and connector pins
6Transmitter base: input and output wiring (screw terminals), mounting base
Only use Vaisala Indigo-compatible probes with the transmitter. Attempting
to connect incompatible probes or probe cables can damage the equipment.
CAUTION!
More information
‣Dimensions (page 68)
‣Indigo Transmitter Base (page 18)
‣Spare Parts and Accessories (page 67)
Chapter 2 – Product Overview
11

2.4 Probe Compatibility
All Indigo-compatible probes can be used with all Indigo transmitter models. Note that the
manufacturing date of Indigo transmitters or Indigo-compatible probes can predate support
for the transmitter or probe.
If your Indigo transmitter has been manufactured before the release date of the probe series
you want to connect to Indigo, it is possible that the transmitter software does not include
support for the newer probe. Similarly, older probes that have been manufactured before
the release of the Indigo transmitter series do not include Indigo support.
More information
‣Probe and Indigo Software Compatibility (page 12)
2.4.1 Probe and Indigo Software Compatibility
The following table shows the compatibility of dierent Indigo 200 series transmitter
software versions and the software versions of Indigo-compatible probes.
Table 2 Indigo 200 Series Transmitter and Probe Software Version Compatibility
Support for Indigo 200 Series in Probe SW Support for Probe in Indigo 200 Series
Transmitters
GMP251: SW 1.2.8 and above Indigo SW 1.0.0 and above (all transmitters)
GMP252: SW 1.2.8 and above Indigo SW 1.0.0 and above (all transmitters)
HPP272: probes with SW 1.2.6 or earlier Indigo SW 1.3.2 and above 1)
HPP272: probes with SW version above 1.2.6 2) Indigo SW 1.4.0 and above 3)
HPP271: SW 1.0.0 and above (all probes) Indigo SW 1.4.0 and above 3)
HMP4, HMP5, HMP7, HMP8 and TMP1: SW 1.0.0 and
above (all probes) Indigo SW 1.3.2 and above 1)
1) Support for probe starting from Indigo transmitter serial number N4650357 (serial numbers running in alphabetical and
numerical order)
2) HPP272 probes starting from probe serial number P3940796
3) Support for probe starting from Indigo transmitter serial number P3930284 (serial numbers running in alphabetical and
numerical order)
Indigo 202 (WLAN interface) User Guide M211966EN-D
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2.5 Indigo Display
Indigo transmitters use a 3.5” TFT LCD color display for displaying notifications, status
information, and measurement data.
hPa | Pressure
Figure 3 Indigo Display with One Parameter
1 2
3
Figure 4 Indigo Display with Relays, Three Parameters and WLAN Notification
1Relay A and relay B status
2Wireless configuration interface indicator (SSID text and WLAN symbol)
3Message field for notifications, warnings and errors
Chapter 2 – Product Overview
13

The Indigo display can be configured to show 1-3 measurement parameters. Information
about the transmitter and connected probe (for example, notifications and warnings) is
shown on a message row at the bottom of the display. Relay and wireless access point
activity is also shown on the display.
The parameters shown on the display, display brightness and display mode (numeric or
graph) can be configured with the wireless configuration interface in the Settings > General
menu.
More information
‣Status View (page 31)
‣Display Settings (page 35)
‣Display Messages (page 63)
2.5.1 Graph Display Mode
Figure 5 Indigo Display in Graph Mode
You can set the Indigo display to show the connected probe's measurement data as a graph.
The display mode can be changed in the wireless configuration interface's Settings >
General menu.
More information
‣Display Settings (page 35)
Indigo 202 (WLAN interface) User Guide M211966EN-D
14

2.5.2 Measurement Reading Locked
Certain probe-specific features cause the measurement reading to lock to its current value
until the probe has finished its action. One such example is probe purge, which heats up the
probe's sensor to remove contamination. While the purge cycle is running, measurements
are not updated.
In the case of purge, the Indigo display shows either the probe message Purge in progress
or, depending on the connected probe, the high-level transmitter message Waiting for
measurements.
Similarly, when the probe is initializing at start-up or has been restarted, up-to-date
measurement data is not available and the Indigo display shows the message Waiting for
measurements.
1025.9
hPa | Pressure
Probe: Purge in progress. [287]
Figure 6 Purge in Progress Message from Probe on Indigo Display
More information
‣Display Messages (page 63)
Chapter 2 – Product Overview
15

2.6 Wireless configuration interface
overview
Indigo transmitters are configured using a wireless browser-based configuration interface
(requires a mobile device or computer with IEEE 802.11 b/g/n WLAN wireless connectivity).
In addition to probe and transmitter configuration and calibration, you can also use the
wireless interface to view measurement data and status information.
Figure 7 Desktop and mobile example views
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.
More information
‣Connecting to wireless configuration interface (page 25)
‣Logging in to wireless configuration interface (page 27)
‣Wireless Interface Menus (page 24)
‣Indigo Wireless Connection Troubleshooting (page 59)
Indigo 202 (WLAN interface) User Guide M211966EN-D
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3. Installation
3.1 Opening and Mounting
To avoid damaging the connector pins of the transmitter, pull the
transmitter cover o the base in a straight angle. Do not twist or bend.
CAUTION!
1. Loosen the 4 screws on the transmitter cover.
2. Carefully open the transmitter cover part of the way from both sides so it is easier to
pull the cover o the base.
3. Pull the transmitter cover o the base in a straight angle. Do not twist or bend.
4. Place the transmitter base on the installation surface and mount it with 3 screws. See
the screw positions in Figure 8 (page 18).
5. Lead the input/output cable inside the transmitter (see Wiring Options (page 19)). If
you are wiring through the lead-through on the bottom of the transmitter, test that the
strain relief works with your cable.
6. Connect the input/output cable's wiring to the screw terminals (see Indigo Transmitter
Base (page 18)) and reattach the cover when done.
Chapter 3 – Installation
17

3.2 Indigo Transmitter Base
1 4
5
6
3
INDIGO 202
DIGITAL TRANSMITTER
Serial No. SX12345678
24V IN
RS485
A. Relay
B. Relay
2
c
Figure 8 Indigo 202 Transmitter Base Main Parts and Screw Positions
1Probe and probe cable connector inside the locking wheel
2Wireless (WLAN) configuration interface activation button
3Wiring from the back: cut open the seal
4Rubber cable lead-through with strain relief
5Screw terminals for relays A and B
6Screw terminals for 24 V power supply input and RS-485 (Modbus) connection
Do not energize the power supply before the wiring has been connected.CAUTION!
Indigo 202 (WLAN interface) User Guide M211966EN-D
18

3.3 Wiring Options
You can wire an input/output cable either through the opening on the back of the
transmitter, or through the rubber lead-through on the bottom of the transmitter.
1
2
Ø 7 ... 8 mm
Figure 9 Indigo Wiring Options
1Wiring from the back: cut the seal open
2Wiring through the rubber lead-through on the bottom of the transmitter
1. To wire the input/output cable through the back of the transmitter:
a. Cut o as much of the seal as is needed to fit your cable through the opening.
b. Lead the cable through the opening and attach a strain relief as needed.
c. If you wire only through the back, plug or seal the lead-through on the bottom.
2. To wire the input/output cable through the rubber lead-through on the bottom:
a. Push the input/output cable through the lead-through.
b. The lead-through provides strain relief and holds the cable in place. Tightening is not
required.
The recommended cable diameter for wiring through the rubber lead-through is
7 ... 8 mm. If you use a dierent cable size, test that the strain relief works as
intended.
Chapter 3 – Installation
19

3.4 Attaching Probes and Cables
1
2
3
Figure 10 Attaching Probes and Cables to Indigo
1Insert probes into the probe connector with the orientation mark facing out.
2Probes are locked in place with the locking wheel. Never turn from the probe body.
3Connect probe cables in the same way as probes: insert the cable in the connector and
hold in place while turning the locking wheel.
1. Insert the probe into the probe connector with the orientation mark on the probe body
facing out.
2. Hold the probe in the probe connector and lock it in place by turning the locking wheel
counterclockwise. Do not turn the probe body when attaching, only the locking wheel
on the transmitter.
3. When the transmitter recognizes the connected probe, it shows a notification message
on the display (for example, Probe Connected: GMP251).
Indigo 202 (WLAN interface) User Guide M211966EN-D
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