Why is my Vaisala Transmitter not responding to serial commands?
If your Vaisala Transmitter isn't responding to serial commands, it could be due to unknown serial line settings or Modbus mode being active. To fix this, temporarily override the transmitter's serial line settings. Another potential cause is the transmitter being in poll mode. If so, establish a connection using the open command.
What to do if Vaisala Transmitter probe outputs stars instead of data?
If the probe outputs stars "****" on the serial line instead of measurement data on your Vaisala Transmitter, it could be due to a wet humidity sensor. Allow the humidity sensor to dry, or remove the filter and gently dry the sensors and the filter with clean instrument air. Another possible cause is sensor damage. Remove the filter and visually inspect the sensors. Finally, ensure that the operating environment is within specified operating limits.
How to fix humidity measurement error [45] on Vaisala HMDW110?
If you see a 'Humidity measurement error. [45]' on your Vaisala Transmitter, it's likely due to a wet humidity sensor. To resolve this, either wait for the humidity sensor to dry, or remove the filter and gently dry the sensors and the filter using clean instrument air.
How to resolve temperature measurement error [44] on Vaisala HMDW110 Transmitter?
If you are experiencing a 'Temperature measurement error. [44]' on your Vaisala Transmitter, check that the legs of the temperature sensor are not short circuited.
What does ambient temperature out of range [48] mean for Vaisala HMDW110 Transmitter?
If you're getting an 'Ambient temperature out of range. [48]' error on your Vaisala Transmitter, it means the ambient temperature is too high. The solution is to lower the temperature at the installation site.
What to do for supply voltage out of range [55] on Vaisala HMDW110?
If your Vaisala Transmitter displays a 'Supply voltage out of range. [55]' error, it indicates that the supply voltage is too low. To fix this, check and correct the power supply and wiring.
How to resolve capacitance reference error [47] on Vaisala HMDW110 Transmitter?
If you receive a 'Capacitance reference error. [47]' on your Vaisala Transmitter, power-cycle the device, and if necessary, restore the factory settings.
General| Measurement Range (Humidity) | 0 to 100 %RH |
|---|---|
| IP Rating | IP65 |
| Measurement Parameters | Humidity, Temperature |
| Measurement Range (Temperature) | -40 to +60 °C |
| Output Signal | 4-20 mA |
| Power Supply | 10 to 30 VDC |
| Operating Temperature | -40 to +60 °C |
| Storage Temperature | -40 to +70 °C |
Details on document versions, release dates, and update content.
Lists other relevant Vaisala manuals for product operation and maintenance.
Explains symbols, formatting, and warning types used throughout the manual.
Overview of HMDW110 series transmitters, models, and applications.
Details on measured and calculated output parameters like RH, T, dew point.
Identifies components for HMD110/112, HMW110/112, and HMS110/112 models.
Details the component board, service port, and analog output behavior.
Covers safety precautions, ESD protection, and regulatory standards conformance.
Lists registered trademarks of Vaisala and other companies.
Overview of HMDW110 series transmitters, models, and applications.
Details on measured and calculated output parameters like RH, T, dew point.
Identifies the components of the HMD110/112 transmitter model.
Identifies the components of the HMW110/112 transmitter model.
Identifies the components of the HMS110/112 transmitter model.
Details the HMDW110 series component board and its connectors.
Describes how analog outputs behave when values exceed the scaled output range.
Covers safety precautions, ESD protection, and regulatory standards conformance.
Guidance on choosing the optimal installation site for different transmitter models.
Step-by-step instructions for installing HMD110/112 models.
Step-by-step instructions for installing HMW110/112 models.
Step-by-step instructions for installing HMS110/112 models.
Instructions for connecting analog output configurations and power.
How to wire both current loops using one power source.
Details voltage and loop resistance requirements for power supply.
Guide for connecting the HMDW110 to the RDP100 remote display panel.
Instructions for connecting devices with Modbus RTU output.
Steps to connect the transmitter to the Vaisala Insight software via USB.
Requirements and steps for connecting to the transmitter's service port.
Configuration settings for terminal applications like PuTTY.
How to access serial commands on devices with Modbus output.
Explanation of available serial commands for device control.
Commands to retrieve device information and operational status.
Managing serial data output and communication settings.
How to send and control measurement data output.
Customizing the format of measurement data sent over serial line.
Commands for managing serial line connections like open, close, address.
Commands for configuring and managing analog output settings.
Commands for performing calibration and adjustment procedures.
Instructions for cleaning the transmitter and its components.
Introduction to calibration concepts and prerequisites.
Details on one-point and two-point calibration methods and adjustment points.
Step-by-step guide for calibrating using a handheld meter and reference probe.
Detailed procedure for one-point humidity calibration using HMK15.
Procedure for two-point humidity calibration using computer and HMK15.
Procedure for two-point temperature calibration using computer.
Steps for replacing the HUMICAP sensor on HMD110/112 and HMW110/112.
Steps for replacing the HUMICAP sensor on HMS110/112 models.
Information on choosing the correct filter for different probe models.
Identifies common problems, their causes, and suggested solutions.
Explains error messages displayed in the Vaisala Insight software.
Lists error codes displayed on the M170 handheld meter.
Details measurement ranges and accuracy for RH and Temperature.
Provides dimensional drawings for HMDW, HMW, and HMS models.
Lists default serial communication settings for Modbus RTU.
Lists standard Modbus function codes used by the device.
Explanation of data encoding formats like 32-bit float for Modbus.
General overview of Modbus registers.
Details on read-only registers for measurement data.
Details on read-only registers for device status and error codes.
Details on writable registers for device configuration.
Registers containing test values for Modbus implementation verification.
Objects used for identifying the device and its properties.
Examples of Modbus read and write operations.
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