Vaisala Indigo 500 Series User Manual
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Vaisala Indigo 500 Series User Manual

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M212287EN-A
User Guide
Indigo 500 Series Transmitters
Indigo 520

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Summary of Contents for Vaisala Indigo 500 Series

  • Page 1 M212287EN-A User Guide Indigo 500 Series Transmitters Indigo 520...
  • Page 2 This product contains software developed disclosed to a third party without prior by Vaisala or third parties. Use of the written permission of the copyright holder. software is governed by license terms and Translated documents and translated...

  • Page 3: Table Of Contents

    About this document..................7 Version information..................7 Related manuals....................7 Documentation conventions................7 Trademarks......................8 Product overview.................... 9 Introduction to Indigo 500 Series Transmitters..........9 2.1.1 Probe compatibility................... 9 Indigo 520 basic features and options............9 Indigo 520 transmitter parts................10 2.3.1 Cable gland and conduit options............10 Touchscreen display..................
  • Page 4 Indigo 520 User Guide M212287EN-A Start-up......................34 Starting up transmitter using touchscreen display........34 5.1.1 Configuring network connection on touchscreen.......35 5.1.2 Setting date and time on touchscreen..........37 Starting up transmitter using web interface..........38 5.2.1 Connecting to web interface..............39 5.2.2 Creating web interface users..............
  • Page 5 Table of contents Maintenance and calibration.................77 Warranty......................77 Technical support.................... 77 Recycling......................77...
  • Page 6 Indigo 520 User Guide M212287EN-A List of figures Figure Indigo 520 cable gland and conduit options, example configurations....................11 Figure 2 Standard wall mounting.................18 Figure 3 Transmitter mounting dimensions.............. 18 Figure 4 Wall mounting with adapter plate.............. 19 Figure 5 Adapter plate dimensions................
  • Page 7 List of tables List of tables Table Document versions (English)................7 Table 2 Related manuals....................7 Table 3 PELV power supply input terminals............. 24 Table 4 AC power supply input terminals..............25 Table 5 Output terminals for relay 1 and relay 2............26 Table 6 Analog output terminals.................
  • Page 8 Indigo 520 User Guide M212287EN-A...

  • Page 9: About This Document

    Chapter 1 – About this document 1. About this document 1.1 Version information This document provides detailed instructions for installing, using, and maintaining Vaisala Indigo 520 transmitters. Table 1 Document versions (English) Document code Date Description M212287EN-A May 2020 First version. 1.2 Related manuals Table 2 Related manuals...

  • Page 10: Trademarks

    Indicates that you need to take some notes during the task. 1.4 Trademarks Vaisalaâ is a registered trademark of Vaisala Oyj. Modbusâ is a registered trademark of Schneider Automation Inc. Microsoftâ, Windowsâ, Internet Explorerâ, and Edge ™ are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.

  • Page 11: Product Overview

    For more information on Indigo 500 transmitter models, see www.vaisala.com/indigo. 2.1.1 Probe compatibility Vaisala Indigo 500 Series Transmitters are the most versatile option for use with Indigo compatible smart probes such as: • Humidity and temperature probes: HMP3, HMP4, HMP5, HMP7, HMP8, HMP9, and TMP1 •...

  • Page 12: Indigo 520 Transmitter Parts

    2.3.1 Cable gland and conduit options The transmitter has 4 lead-throughs. The glands or conduit fittings for the lead-throughs are selected when ordering the transmitter. Unused lead-throughs are plugged. The following figure shows examples of different cable gland and conduit configurations available from Vaisala.

  • Page 13: Touchscreen Display

    Chapter 2 – Product overview Figure 1 Indigo 520 cable gland and conduit options, example configurations Cable gland, M20×1.5 Cable gland, M16×1.5 Cable gland with split bushing, M20×1.5 Conduit fitting, M20×1.5 for NPT1/2" conduit More information ‣ Spare parts and accessories (page 72) 2.4 Touchscreen display You can configure the transmitter's capacitive touchscreen display to show numeric readings of 1 …...

  • Page 14: Web Interface

    Indigo 520 User Guide M212287EN-A More information ‣ Touchscreen display and main views (page 31) ‣ Starting up transmitter using touchscreen display (page 34) 2.5 Web interface The transmitter also has a web interface for remote access. You can configure the web interface to show numeric readings and graphs of 1 …...

  • Page 15: Digital Output

    Chapter 2 – Product overview Analog outputs are not available in transmitters that are powered with Power over Ethernet (PoE). More information ‣ Configuring analog outputs on touchscreen (page 49) ‣ Configuring analog outputs in web interface (page 57) 2.6.2 Digital output The transmitter supports the Modbus TCP/IP communication protocol (over Ethernet).

  • Page 16: Safety

    A readily accessible disconnect device must be incorporated in the fixed wiring. CAUTION! Attach only Vaisala Indigo compatible probes to the transmitter. CAUTION! Do not modify the unit or use it in ways not described in the documentation.

  • Page 17: Esd Protection

    2.8.1 ESD protection Electrostatic Discharge (ESD) can damage electronic circuits. Vaisala products are adequately protected against ESD for their intended use. However, it is possible to damage the product by delivering electrostatic discharges when touching, removing, or inserting any objects in the equipment housing.

  • Page 18: Canada Ices-003 Compliance Statement

    Indigo 520 User Guide M212287EN-A no guarantee that the interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: •...

  • Page 19: Installation

    Choose the location of the transmitter so that the power outlet is accessible. Besides the standard wall mounting, the transmitter has the following mounting options: • Wall mounting with adapter plate (retrofit to replace Vaisala 330 series transmitters such as HMT330) •...

  • Page 20: Standard Wall Mounting

    Indigo 520 User Guide M212287EN-A 3.2.1 Standard wall mounting • Hex key (4 mm), provided • Screws (2 pcs), provided • Crosshead screwdriver • Washers (2 pcs), provided • Drill with Ø 8 mm drill bit • Wall plugs (2 pcs), provided Figure 2 Standard wall mounting [in] Figure 3 Transmitter mounting dimensions...

  • Page 21: Wall Mounting With Adapter Plate

    • Screws 14 mm (2 pcs), provided • Wall plugs (4 pcs) • Washers (2 pcs), provided Using an adapter plate, you can install an Indigo 500 transmitter to replace a Vaisala 330 series transmitter in the exact same location. Figure 4 Wall mounting with adapter plate...

  • Page 22: Din Rail Mounting

    Indigo 520 User Guide M212287EN-A 183 [7.2] 169 [6.7] Ø 7 [0.28] [in] Figure 5 Adapter plate dimensions 1. Attach the adapter plate to the mounting holes using 4 screws and 4 wall plugs. 2. Open the 2 hex screws on the cover of the transmitter using a 4-mm hex key. 3.

  • Page 23: Pole Mounting

    Chapter 3 – Installation Figure 6 Attaching DIN rail clip fasteners 1. Open the 2 hex screws on the cover of the transmitter using a 4-mm hex key. 2. Open the transmitter cover. 3. Attach the DIN rail clip fasteners on the back of the transmitter using 2 × 14-mm screws and a 5-mm hex key.

  • Page 24: Figure 7 Attaching Mounting Plate To Fixing Brackets - Vertical

    Indigo 520 User Guide M212287EN-A Figure 7 Attaching mounting plate to fixing brackets - vertical pole mounting Mounting nuts for fixing brackets, M8 (4 pcs) Note the position of the arrow when mounting. This side must be face up when mounting. Figure 8 Attaching transmitter to mounting plate - vertical pole mounting...

  • Page 25: Wiring

    • Open-ended spanners of sizes 17 mm, 19 mm, 22 mm and 24 mm • Flat head screwdriver • Cable glands as required by your application (available from Vaisala) • Cables as required by your application (probe connection cables and power cables are available from Vaisala) 3.3.1 Power supply terminals and lead-through −...

  • Page 26: Power Supply Terminals And Lead-Through − Ac (Mains) Power Option

    Power supply input wiring is required only for transmitters powered with protective extra low voltage (PELV) or AC (mains) power. For the M20×1.5 cable gland ordered together with the transmitter from Vaisala, RS-485 PROBE the cable diameter is 5.0 … 8.0 mm 24 VOUT (0.20 …...

  • Page 27: Relay Output Terminals And Lead-Through

    Chapter 3 – Installation Table 4 AC power supply input terminals Terminal Function Notes Power supply ground Line 100 … 240 VAC 50/60 Hz Neutral 3.3.2.1 Preparing AC (mains) power cable • Cable stripping tool Prepare the AC (mains) power cable for connection to the power supply input terminal: Figure 9 Example of stripped AC (mains) 55 [2.17] power cable...

  • Page 28: Analog Output Terminals And Lead-Through

    24 VOUT ANALOG For the M20×1.5 cable gland ordered INPUT together with the transmitter from Vaisala, the cable diameter is 5.0 … 8.0 mm (0.20 … 0.31 in). Tightening torque for the cable gland is 8 Nm. M20×1.5 Table 5 Output terminals for relay 1 and relay 2...

  • Page 29: Ethernet Connector And Lead-Through

    Chapter 3 – Installation For the M20×1.5 cable gland with split bushing, the cable diameter is 7 mm (0.28 in). Table 6 Analog output terminals Terminal Function Notes CH1 + Analog output channel 1 + Max. wire size: 2.5 mm (14 AWG) CH1 - Analog output channel 1 - CH2 +...

  • Page 30: Probe Connection Terminals And Lead-Throughs

    Before connecting wires or cables, make sure that the transmitter is powered off. For the M16×1.5 cable glands ordered together with the transmitter from Vaisala, the cable diameter is 2.0 … 6.0 mm (0.08 … 0.24 in). Tightening torque for the cable gland is 6 Nm.

  • Page 31: Verifying Tightness Of Cable Glands

    If you want to configure the probe settings, such as purge interval, you must do that before attaching the probe to the transmitter. To configure the probe, you can use the free Vaisala Insight PC software. For more information, see your probe's user guide and visit www.vaisala.com/insight.

  • Page 32: Figure 11 Attaching Probes To Transmitter Using Probe Cable Connector

    Indigo 520 User Guide M212287EN-A Figure 11 Attaching probes to transmitter using probe cable connector Probe connection cable, probe 1 Probe connection cable, probe 2 Probe to be connected as probe 2 (GMP252 example) Probe to be connected as probe 1 (HMP7 example) Probe cable connector (5-pin M12) You can attach the probes to the wall using the mounting accessory provided with the probes.

  • Page 33: User Interfaces

    Chapter 4 – User interfaces 4. User interfaces 4.1 Touchscreen display and main views The touchscreen display starts up when you power up the transmitter. On the touchscreen display, you can: • View live measurement data numerically and graphically • View output status •...

  • Page 34: Figure 13 Configuration Menu On Touchscreen

    Indigo 520 User Guide M212287EN-A Figure 13 Configuration menu on touchscreen Home: Return to Home views. Home settings: Configure Home views. Notifications: View all the notifications that are currently active. Outputs: Configure analog outputs, relays, and Modbus TCP/IP. Transmitter: Configure transmitter settings. Current IP address of the transmitter More information ‣...

  • Page 35: Web Interface And Main Views

    Chapter 4 – User interfaces 4.2 Web interface and main views Figure 14 Web interface and main views Home > Measurements: View live measurement data numerically and graphically. Add and remove measurement parameters (1 … 6). Outputs: Configure analog outputs, relays, and Modbus TCP/IP (Administrator user level only).

  • Page 36: Start-Up

    Indigo 520 User Guide M212287EN-A 5. Start-up 5.1 Starting up transmitter using touchscreen display 1. Remove the plastic protection cover on the touchscreen display. 2. Power up the transmitter. Powering up takes some minutes. After the power-up, the Measurements (Home) view opens, showing the 2 preferred measurement parameters from each connected probe.

  • Page 37: Configuring Network Connection On Touchscreen

    Chapter 5 – Start-up 4. The default language of the user interface is English. If you want to use another language, select it in Transmitter > Language. Your transmitter is now ready for operation. You can next go through these additional settings: •...

  • Page 38: Figure 15 Network Settings On Touchscreen

    Indigo 520 User Guide M212287EN-A Figure 15 Network settings on touchscreen 1. Make sure that the Ethernet cable is connected to the transmitter. The Ethernet connector's LED lights up. 2. Select the configuration menu symbol at the upper right corner of the touchscreen. 3.

  • Page 39: Setting Date And Time On Touchscreen

    Chapter 5 – Start-up 6. If you selected Static IP, fill in the rest of the fields with information provided by your local network administrator: IP address The four part network ID of the transmitter. Subnet mask Used together with the IP address to determine which network the transmitter is a part of.

  • Page 40: Starting Up Transmitter Using Web Interface

    Indigo 520 User Guide M212287EN-A 3. To set date and time automatically: a. In Set date and time, select Automatically. b. Select Time zone. c. In NTP server addresses, configure the Network Time Protocol (NTP) servers that the transmitter will attempt to synchronize with. NTP synchronization requires that the transmitter has a network connection and the IP address of the NTP server is reachable.

  • Page 41: Connecting To Web Interface

    Chapter 5 – Start-up Figure 17 Web interface, Measurements (Home) view 5.2.1 Connecting to web interface Computer with: • RJ45 Ethernet connector • Web browser, for example, Firefox, Chrome, or Safari. Using the most recent version is recommended. 1. Connect your computer to the same network as the transmitter. If you are connecting the transmitter directly to your computer, connect the Ethernet cable from the transmitter to the computer.

  • Page 42: Creating Web Interface Users

    Indigo 520 User Guide M212287EN-A 5. Open a web browser. In the address field, type https://<transmitter's IP address>:8443. • Example: https://172.24.65.229:8443 You can see the IP address of the transmitter on the touchscreen, at the bottom left corner of the configuration menu Your web browser may give a certificate error, but you can safely proceed to the transmitter's IP address.
  • Page 43 Chapter 5 – Start-up 2. Type the activation code, and select Activate. Then select Next. The activation code is printed on a label inside the transmitter enclosure. Use a 4-mm hex key to open the transmitter cover. 3. Create a username and password for the Administrator user, and select Next. 4.

  • Page 44: Logging In To Web Interface

    Indigo 520 User Guide M212287EN-A 5.2.3 Logging in to web interface 1. Type a username. 2. Type a password. 3. Select Log in. The web interface opens in the Measurements (Home) view. 5.2.4 Changing language in web interface 1. Log in to the web interface.

  • Page 45: Configuring Network Connection In Web Interface

    Chapter 5 – Start-up 2. The default language of the web interface is English. If you want to use another language, select it in User > Preferences. The language setting is web browser-specific. It is stored in the web browser's memory. 5.2.5 Configuring network connection in web interface You need Administrator user rights for this task.

  • Page 46: Figure 19 Network Settings In Web Interface

    Indigo 520 User Guide M212287EN-A Figure 19 Network settings in web interface 1. Log in to the web interface as an administrator user. 2. Select Transmitter > Network. 3. Select the setting type: • Select DHCP if the transmitter is in a network that assigns network settings automatically.

  • Page 47: Setting Date And Time In Web Interface

    Chapter 5 – Start-up 5.2.6 Setting date and time in web interface You need Administrator user rights for this task. Figure 20 Date and time settings in web interface The transmitter uses UTC (Coordinated Universal Time) internally. Time and time stamps in the web interface are shown according to the time zone set in Transmitter >...
  • Page 48 Indigo 520 User Guide M212287EN-A 4. To set date and time manually: a. In Set date and time, select Manually. b. Select Time zone, Date, and Time. 5. Select Apply. More information ‣ Configuring web interface home view (page 56) ‣...

  • Page 49: Configuring Transmitter Using Touchscreen Display

    Chapter 6 – Configuring transmitter using touchscreen display 6. Configuring transmitter using touchscreen display 6.1 Accessing configuration menu 1. Select the configuration menu symbol at the upper right corner of the screen. The configuration menu opens.

  • Page 50: Configuring Home Views On Touchscreen

    Indigo 520 User Guide M212287EN-A 6.2 Configuring home views on touchscreen You can select how many measurement parameters you want to see in the following Home views on the touchscreen display: • Measurements view • Graph view Figure 21 Configurable Home views on touchscreen Measurements view with slots for 1 …...

  • Page 51: Configuring Analog Outputs On Touchscreen

    Chapter 6 – Configuring transmitter using touchscreen display 3. In the Measurements tab, in Slot 1 … 4, select which parameters are shown in the different slots in the Measurements view. 4. In the Graph tab, define what is shown in the Graph view: a.

  • Page 52: Figure 22 Analog Outputs Configuration Menu On Touchscreen, General Tab Active

    Indigo 520 User Guide M212287EN-A Figure 22 Analog outputs configuration menu on touchscreen, General tab active The General tab contains the settings that are common for all analog output channels. The Output 1 … 4 tabs contain individual settings for each analog output channel. A circle next to the channel name indicates that the channel is on.
  • Page 53 Chapter 6 – Configuring transmitter using touchscreen display 5. Configure the analog output channel settings: a. In Output off/on, set the output channel off to edit settings. b. In Parameter, select the probe and the measurement parameter that controls the output channel.

  • Page 54: Analog Output Configuration Example

    Indigo 520 User Guide M212287EN-A 6.3.1 Analog output configuration example This example shows how to configure analog output channel 1 to use the following settings when a relative humidity probe is connected to the transmitter as Probe 1: • 4 … 20 mA current output •...

  • Page 55: Figure 23 Relays Configuration Menu On Touchscreen, Relay 2 Tab Active

    Chapter 6 – Configuring transmitter using touchscreen display Figure 23 Relays configuration menu on touchscreen, Relay 2 tab active The Relay 1 … 2 tabs contain individual settings for each relay. A circle next to the relay name indicates that the relay is on. 1.

  • Page 56: Relay Configuration Example

    Indigo 520 User Guide M212287EN-A 6.4.1 Relay configuration example This example shows how to configure a relay to activate when relative humidity measurement from Probe 1 goes above 90 %RH, and to switch off only when the measurement falls below 85 %RH (hysteresis). To configure the relay, use the following values: •...

  • Page 57: Relay Hysteresis

    Chapter 6 – Configuring transmitter using touchscreen display 6.4.3 Relay hysteresis If the measurement you are using to control the relay is likely to move back and forth close to the activation setpoint, you can set a hysteresis that prevents the relay switching on and off too frequently.

  • Page 58: Configuring Transmitter Using Web Interface

    Indigo 520 User Guide M212287EN-A 7. Configuring transmitter using web interface 7.1 Configuring web interface home view You can select how many measurement parameters (1 … 6) you want to see in the Measurements (Home) view of the web interface. Both Guest and Administrator users can configure the Measurements view. 1.

  • Page 59: Configuring Analog Outputs In Web Interface

    Chapter 7 – Configuring transmitter using web interface 7.2 Configuring analog outputs in web interface You need Administrator user rights for this task. Figure 25 Analog outputs configuration menu in web interface 1. Connect to the web interface. 2. Log in to the web interface as an administrator user. 3.

  • Page 60: Configuring Relays In Web Interface

    Indigo 520 User Guide M212287EN-A 6. Configure the analog output channel settings: a. In Output off/on, set the output channel off to edit settings. b. In Source, select the source for the measurement parameter that controls the output channel. c. In Parameter, select the measurement parameter that controls the output channel. d.

  • Page 61: Figure 26 Relays Configuration Menu In Web Interface

    Chapter 7 – Configuring transmitter using web interface Figure 26 Relays configuration menu in web interface 1. Connect to the web interface. 2. Log in to the web interface as an administrator user. 3. Select Outputs > Relays. 4. Select the relay you want to configure: Relay 1 or Relay 2.

  • Page 62: Enabling Modbus Tcp/Ip In Web Interface

    Indigo 520 User Guide M212287EN-A 5. Configure the relay settings: a. In Relay off/on, set the relay off to edit settings. b. In Source, select the source for the measurement parameter that controls the relay. c. In Parameter, select the measurement parameter that controls the relay. d.

  • Page 63: Modbus

    Chapter 8 – Modbus 8. Modbus 8.1 Modbus overview The transmitter supports the Modbus TCP/IP communication protocol (over Ethernet). The transmitter and the connected probes are treated as separate Modbus slaves, each with their own fixed unit identifier (unit ID) value. Note the following limitations of the Modbus implementation: •...
  • Page 64 Indigo 520 User Guide M212287EN-A If you send a request to a port without a connected probe, the transmitter responds with the exception code Gateway Path Unavailable For probe-specific register information, see the connected probe's Modbus documentation. More information ‣ Modbus reference (page 73)

  • Page 65: Maintenance And Troubleshooting

    If you want to configure the probe settings, such as purge interval, you must do that before attaching the probe to the transmitter. To configure the probe, you can use the free Vaisala Insight PC software. For more information, see your probe's user guide and visit www.vaisala.com/insight.

  • Page 66: Updating Transmitter Software Version

    Before you start: • Make sure that you have the software update file locally on your computer. You can get the software update file from www.vaisala.com/downloads. • If your transmitter does not have a network connection, make sure that both the transmitter and the computer connected to it are set to use static network settings.
  • Page 67 Chapter 9 – Maintenance and troubleshooting 3. In Transmitter > Software, select Choose file, and browse to the software update file. 4. Select Upload when the button becomes active. Uploading takes some minutes. 5. Select Activate when the button becomes active. The transmitter restarts.

  • Page 68: Restoring Factory Default Settings

    Indigo 520 User Guide M212287EN-A 9.4 Restoring factory default settings You can restore all device settings to the factory default settings. This will take some minutes. CAUTION! A factory reset deletes all current settings of the device. After the factory reset, you need to reconfigure the settings, including outputs and relays. When you connect to the web interface the next time, you will be prompted to give the activation code and create new users.

  • Page 69: Troubleshooting

    If you have a problem with using the transmitter, 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.
  • Page 70 Indigo 520 User Guide M212287EN-A Problem: You cannot access the web interface login page. If the transmitter is using a Check the static network settings on the touchscreen. static IP address, there may be • Menu path on touchscreen: Menu > Transmitter > Network something wrong with the static network settings.
  • Page 71 The probe sensor may be faulty, replace it. faulty. 4. If the indicator is blinking green, restart the transmitter. 5. If the problem still persists, contact Vaisala. More information ‣ Opening and closing transmitter cover (page 17) ‣ Connecting to web interface (page 39) ‣...

  • Page 72: Technical Data

    Indigo 520 User Guide M212287EN-A 10. Technical data 10.1 Specifications Table 11 Transmitter options Property Specification Display • Touchscreen display Powering • Protective extra low voltage (15 … 35 VDC, 24 VAC ± 20%) • AC (mains) power (100 … 240 VAC 50/60 Hz) •...

  • Page 73: Table 14 Compliance

    Chapter 10 – Technical data Property Specification External loads: Current outputs < 500 Ω 0 … 1 V output > 2 kΩ 0 … 5 V and 0 … 10 V outputs > 10 kΩ Max. wire size 2.5 mm (14 AWG) Accuracy of analog outputs at +20 °C ±0.05 % full scale...

  • Page 74: Spare Parts And Accessories

    Indigo 520 User Guide M212287EN-A Property Specification Dimensions (H×W×D) 142×182×67 mm (5.63×7.17×2.64 in) Cable diameters for cable glands M20×1.5 glands 5.0 … 8.0 mm (0.20 … 0.31 in) M20×1.5 glands with split bushing 7 mm (0.28 in) M16×1.5 glands 2.0 … 6.0 mm (0.08 … 0.24 in) 10.2 Spare parts and accessories Table 16 Accessories Item...

  • Page 75: Appendix A: Modbus Reference

    43 / 14 / 0E Read Device Can be used only for reading transmitter Identification identification information using unit ID 240. A.3 Device identification objects Table 20 Device identification objects Object id (decimal) Object id (hexadecimal) Object name Example contents VendorName “Vaisala” ProductCode "INDIGO520"...
  • Page 76 Indigo 520 User Guide M212287EN-A Object id (decimal) Object id (hexadecimal) Object name Example contents MajorMinorVersion "1.2.3" Software version of the device. VendorUrl “http://www.vaisala.com/” ProductName "INDIGO520 Transmitter" “K0710040” SerialNumber Vaisala-specific device identification object.

  • Page 77: Modbus Communication Examples

    Appendix A – Modbus reference A.4 Modbus communication examples Reading RH value from HMP4 probe connected to the transmitter as Probe 1 The values returned by the device differ depending on the ambient conditions. Your device might not return exactly the same values. Request Response Bytes in the frame...
  • Page 78 Indigo 520 User Guide M212287EN-A Communication description Register address 1 (1-based Modbus register number) = 0000 (0-based register address used in actual communication) based on the Modbus Reference in HMP4 User Guide Data format 2 16-bit Modbus registers interpreted as IEEE 754 binary32 floating point value, least significant word first Returned value 41F47AE1...
  • Page 79 Maintenance and calibration Vaisala offers comprehensive customer care throughout the life cycle of our measurement instruments and systems. Our factory services are provided worldwide with fast deliveries. For more information, see www.vaisala.com/ calibration. • Vaisala Online Store at store.vaisala.com is available for most countries. You can browse the offering by product model and order the right accessories, spare parts, or maintenance and calibration services.
  • Page 82 www. v aisala.com...

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