This manual describes the features and usage of Vaisala DRYCAP® DMT242 dewpoint transmitter
This manual describes the Vaisala DMT242 handheld dewpoint meter, covering its basic operation, pressure settings, and measurement principles. It includes wiring diagrams, RS‑232 communication parameters, and service center contact information.
Technical specifications such as temperature measurement ranges, accuracy, power requirements, and humidity limits are listed, along with installation notes and calibration procedures. The document also provides part numbers and mechanical dimensions for accessories.
| Power supply (DC) | 17 – 35 VDC |
|---|---|
| Power supply (AC) | 20 – 28 VAC |
| Maximum current (DC) | 220 mA |
| Measurement range (DMT242A) | -80 °C to +20 °C |
| Accuracy | < +2 °C |
| Relative humidity range | 0 % to 100 % RH |
The DMT242A measures temperatures from –80 °C to +20 °C.