This Quick Guide provides an overview on how to install Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMT330, Vaisala DRYCAP® Dewpoint and Temperature Transmitter Series DMT340 and Vaisala HUMICAP® Moisture and Temperature Transmitter Series for Oil MMT330. Please refer to the relevant User's Guides for detailed information on the use of the products.
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.
| Cable diameter | 8‑11 mm |
|---|---|
| Start‑up time (DMT340) | about 6 minutes |
| Recommended sampling material | stainless steel (PTFE down to -40 °C) |
The DMT340 requires about six minutes for its self‑diagnostics before the outputs become active.