This manual introduces the use of Vaisala HMI41 indicator and HMP41/45/46 probes, including the composition of the indicator, usage instructions, measurement methods, and calibration methods.
The manual describes the portable HMI41 indicator, which measures relative humidity, temperature and dew‑point, and can display absolute humidity, wet‑bulb temperature and mixture ratio. It explains how to install batteries, attach the various HMP41‑HMP46 probes, calibrate the instrument, and collect data manually or automatically.
It also covers data transfer to a PC via a serial interface cable (reference 19446Z7Z), error considerations for humidity measurements, maintenance procedures, technical specifications and warranty information. This manual is written in French.
| Humidity measurement range | 0 – 100 %HR |
|---|---|
| Battery type | 4 AA (LR6) batteries |
| Data transfer cable reference | 19446Z7Z |
| Humidity measurement error at 90 %HR | +5.4 %HR per +1 °C temperature difference |
It uses four AA (LR6) batteries.
The instrument measures relative humidity from 0 to 100 %HR.
Data can be downloaded via a serial interface cable, part number 19446Z7Z.