Key facts
- Brand
- Vaisala
- Model
- MMT330
- Industry
- Industrial
- Documents
- 8
- Languages
- JA · EN · FI · FR · SV
- Last added
- 2012-04-06
Start here
Vaisala HMT330 DMT340 MMT330 Quick Reference Guide
This guide provides concise installation instructions for the Vaisala HUMICAP® HMT330, DRYCAP® DMT340 and HUMICAP® MMT330 transmitters. It covers key considerations for dew‑point, relative humidity and oil‑moisture measurements, recommended sampling‑system materials, and proper probe mounting to avoid condensation.
The document also details wiring recommendations (single screened cable 8‑11 mm diameter, 3‑10 conductors), standard mounting with four M6 screws, language‑selection menu on first power‑up, start‑up time for the DMT340 (≈6 minutes), and calibration information. Service center contacts for North America, Europe, Japan and China are provided.
Vaisala MMT330 specifications
| Power supply | AC 24 V |
|---|---|
| RS‑422/485 interface | Available |
| Optional modules | Analog output, relay, RS‑485 |
All Vaisala MMT330 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
- Vaisala MMT330 Operating Instructions 156 p
- Vaisala MMT330 User Guide 176 p
- Vaisala MMT330 Transmitter User's Guide 180 p
- Vaisala MMT330 Humidity and Dew Point Transmitter User Guide 156 p
- Vaisala MMT330 User Manual 156 p
- Vaisala MMT330 User Manual 150 p
- Vaisala MMT330 Moisture and Temperature Sensor User Manual 150 p
The shortest path to a working setup, usually only a few pages.
Questions answered in these manuals
How is the MMT330 powered?
Connect the unit to an AC 24 V power source as described in the wiring section.
How do I connect the MMT330 to a 24 VAC power supply?
Connect the transmitter to a 24 VAC power supply as described in the Signal and Power Supply Wiring section.
How can I configure the LAN interface on the MMT330?
Use the LAN Communication settings and the Web Configuration for LAN and WLAN described in the guide.
How can I change the display language?
Use the language‑change option in the menu to select the desired language.
From: Vaisala MMT330 Humidity and Dew Point Transmitter User Guide
How can I configure LAN communication?
Use the LAN‑communication section to set up IP configuration and connect the sensor to the network.
How is the sensor calibrated and adjusted?
Refer to the Calibration and Adjustment chapter for procedures on cleaning the sensor, adjusting relative humidity, and setting temperature offsets.