Key facts
- Brand
- Vaisala
- Model
- HM34
- Industry
- Industrial
- Documents
- 2
- Languages
- JA · EN
- Last added
- 2012-04-06
Start here
Vaisala HM34 Humidity and Temperature Meter User Manual
The HM34 is a pocket‑size, battery‑operated meter for measuring ambient relative humidity and temperature. It uses Vaisala’s HUMICAP® humidity sensor and a Pt 100 temperature sensor, and is intended for spot checks, industrial monitoring, occupational health, and laboratory use.
The manual covers product description, operation of the four function buttons, calibration and maintenance procedures, spare parts, technical specifications, and warranty information. It also includes sensor details, battery information, and optional accessories.
Vaisala HM34 specifications
| Temperature range | -20 °C to +60 °C |
|---|---|
| Relative humidity accuracy (0‑90 %RH) | ±2 %RH |
| Relative humidity accuracy (90‑100 %RH) | ±3 %RH |
| Temperature coefficient | 0.049 %RH/°C |
| Display | 312‑segment LCD |
| Power source | 9 V alkaline battery (006P) |
| Battery life | ≈ 50 h |
| Weight | 250 g |
Source: Vaisala HM34 Pocket-Sized Humidity/Temperature Meter Operating Instructions
All Vaisala HM34 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 do I turn the HM34 on and off?
Press the ON/OFF button to power the device on, and press the power key again to turn it off.
From: Vaisala HM34 Pocket-Sized Humidity/Temperature Meter Operating Instructions
How long does the battery last?
The battery operates for about 50 hours of use.
From: Vaisala HM34 Humidity and Temperature Meter User Manual
How do I hold a reading on the display?
Press the HOLD pushbutton; the display shows an (s) indicating the reading is held.
From: Vaisala HM34 Humidity and Temperature Meter User Manual