What to do if Vaisala HMT370EX does not power on?
If your Vaisala Transmitter isn't powering on, first ensure that analog output channel 1 (CH1) is wired, as the transmitter receives power through it. Also, verify that the supply voltage is within the range of 12 – 28 V DC, with a minimum of 12 V DC measured at the transmitter's screw terminals. Finally, check the screw terminal connections to ensure correct polarity.
What to do if Vaisala Transmitter shows temperature sensor failure?
If you're experiencing a temperature sensor failure with your Vaisala Transmitter, start by visually inspecting the probe head and sensors. If the probe is wet, allow it to dry out. If the sensors are damaged or missing and the error persists, contact Vaisala for probe repair.
Why Vaisala HMT370EX has unexpected device restart?
If your Vaisala Transmitter is unexpectedly restarting, check that the supply voltage is stable and that the operating environment is within the specified limits.
How to locate Insight PC software configuration options for Vaisala Transmitter?
If you cannot locate Insight PC software configuration options for your Vaisala Transmitter, it might be because you are not in Advanced Mode. Switch from Basic Mode to Advanced Mode in the Settings menu to access all functionalities.
How to change language on Vaisala HMT370EX Transmitter local display?
If the Vaisala Transmitter local display interface language is incorrect, follow these steps: 1. Press and hold Back to return to the home view. 2. Press Select three times to open the Display menu. 3. Press Down once to move to the language selection menu item. 4. Press Select to open the language selections. 5. Use the Up and Down buttons to select the correct language, then press Select to confirm.
What to do if calibration has expired on Vaisala Transmitter?
If the calibration has expired on your Vaisala Transmitter, calibrate the probe and update the calibration date information.
What to do if calibration is about to expire on Vaisala Transmitter?
If the calibration is about to expire on your Vaisala Transmitter, calibrate the probe and update the calibration date information.
What to do if Vaisala Transmitter does not power on when power supply is switched on?
If the Vaisala Transmitter doesn't power on, there could be several reasons. First, analog output channel 1 (CH1) must always be wired, as the transmitter receives power through it. The device will not power on if only Channel 2 (CH2) is wired. Second, ensure that the transmitter is powered correctly using a supply voltage range of 12 – 28 V DC, with a minimum of 12 V DC measured at the transmitter screw terminals. Finally, check that the screw terminal connections have been made correctly.
Why does the analog output level appear incorrect on my Vaisala Transmitter?
An incorrect analog output level on your Vaisala Transmitter may be due to insufficient supply voltage. Ensure that the transmitter is powered correctly. The minimum voltage required in all conditions is 12 V DC, measured at the transmitter screw terminals. If the supply voltage is less than 12 V DC, the analog output current can be erroneous.
Details document revision history and changes made in different versions.
Lists other relevant Vaisala manuals for the product.
Explains symbols, warnings, and notes used throughout the manual.
Overview of the HMT370EX as a humidity and temperature transmitter for hazardous areas.
Lists key features, measurement parameters, and certifications of the HMT370EX.
Provides essential safety warnings for operating in hazardous environments.
Details the various physical quantities the HMT370EX can measure.
Describes the available display configurations for the transmitter.
Explains how to connect the transmitter to Vaisala's configuration software.
Provides a guide to safety certification details for different regions.
Details safety requirements for ATEX and IECEx certified hazardous area use.
Details safety requirements for US (FM) certified hazardous area use.
Details safety requirements for UK (UKEX) certified hazardous area use.
Details the various probe types available for the HMT370EX transmitter.
Explains the configuration for probes measuring temperature only.
Describes the HMP374 probe designed for high-pressure environments.
Details the HMP378 probe for measurements inside pipelines.
Explains the HMP378F variant for oil measurements.
Provides a general overview of the installation process for the HMT370EX.
Outlines essential steps and checks before starting the installation.
Describes the different methods for installing the transmitter probes.
Details how to physically mount the HMT370EX transmitter.
Covers the electrical wiring procedures for the transmitter.
Illustrates wiring diagrams using galvanic isolators for safety.
Introduces the graphical LCD display and its interface.
Shows the main navigation menu structure of the display.
Details the configuration options available within the settings menu.
Explains how to configure analog output channels.
Covers environmental compensation and filtering settings.
Details the procedures for calibrating measurements.
Introduces the software for configuring and managing the transmitter.
Guides on connecting the transmitter and probe to the PC software.
Instructions for installing the necessary USB driver.
Explains the interface for the transmitter when connected to Insight.
Explains the 4-20 mA analog output channels and their configuration.
Details how to configure analog outputs using the PC software.
Describes how to test and verify the analog output signals.
Steps to test analog outputs using the local display.
Overview of settings for environmental factors and measurement filtering.
Details how to set up pressure compensation for accurate measurements.
Explains how to apply filtering to smooth measurement outputs.
Covers setting coefficients for specific measurement calculations.
Provides an overview of the calibration and adjustment process.
Guides on adjusting measurements using the Insight PC software.
Guides on adjusting measurements using the local display.
Overview of adjusting analog output levels.
Steps to adjust analog output levels using Insight software.
General information on inspecting and maintaining the transmitter and probe.
Information on how to contact Vaisala for technical assistance.
Details the process for replacing the probe filter.
Lists common issues and their resolution steps.
Explains various error messages and their meaning.
Describes how to reset the transmitter and probe to factory defaults.
Presents detailed technical specifications for measurement performance.
Lists specific technical data for the HMP371 probe.
Lists specific technical data for the HMP374 probe.
Lists available spare parts and accessories for the product.
General| Humidity Measurement Range | 0 ... 100 %RH |
|---|---|
| Protection Class | IP65 |
| Explosion Proof Certification | ATEX, IECEx |
| Intrinsically Safe | Yes |
| Measurement Parameters | Humidity, Temperature |
| Humidity Accuracy | ±1 %RH (0 ... 90 %RH) ±1.7 %RH (90 ... 100 %RH) |
| Temperature Accuracy | ±0.2 °C |
| Output Signals | 4...20 mA |
| Operating Temperature Range | -40 to +60 °C |
| Housing Material | Stainless steel |
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