This document is an operating manual for HMI41 Indicator and HMP42 Probe. It provides instructions on getting started, connecting the probe, and measuring humidity.
This operating manual covers the HMI41 portable humidity and temperature indicator together with the HMP42 probe. It explains how to insert batteries, connect the probe, start measurements, and use the various display modes such as MIN, MAX, HOLD, and data‑collecting functions.
The guide also details calibration methods, data transfer to a PC via a serial interface, setup procedures, maintenance tasks, troubleshooting, and technical specifications of the indicator and probe.
| Humidity measurement range | 0 – 100 %RH |
|---|---|
| Temperature measurement range (HMP42) | -40 °C to +100 °C |
| Probe head diameter (HMP42) | 4 mm |
| Probe head length (HMP42) | 23.5 cm |
| Battery type | 4 × AA (LR6) |
It uses four AA (LR6) batteries.
The indicator measures humidity from 0 %RH to 100 %RH.
The HMP42 probe works from –40 °C up to +100 °C.
Readings can be transferred via the serial interface (order code 19446ZZ).