Key facts
- Brand
- Vaisala
- Model
- DMT242
- Industry
- Industrial
- Documents
- 6
- Languages
- JA · EN · FR · ZH
- Last added
- 2012-04-06
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Vaisala DMT242 User Manual
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.
Vaisala DMT242 specifications
| Measurement range | -80 °C … +602 °C |
|---|---|
| Analog output | 4 mA … 20 mA |
| Output resolution | 0.002 mA |
| Maximum current consumption | 220 mA @ 24 VDC |
| Maximum load on output | 300 Ω |
| Default pressure setting (factory) | 1 bar (switch 4 ON) |
Source: Vaisala DMT242 Temperature Transducer Operating Instructions
All Vaisala DMT242 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How long must I wait after powering the DMT242 before taking a measurement?
After power‑up, wait 7 minutes before the measurement becomes available.
From: Vaisala DMT242 Temperature Transducer Operating Instructions
How often should the DMT242 be calibrated or checked?
Calibration or checking should be performed every 2 years.
From: Vaisala DMT242 Temperature Transducer Operating Instructions
What temperature range does the DMT242A model measure?
The DMT242A measures temperatures from –80 °C to +20 °C.
How long should I wait after powering on the DMT242 before taking measurements?
Wait about 7 minutes after power‑on; the start‑up self‑diagnostics freeze the output during the first minutes.
What is the analog output range of the DMT242?
The analog output signal spans 4 to 20 mA.
How often should the DMT242 be recalibrated?
Calibration is recommended every two years, and on‑site checks can be performed with a reference sensor.