To set up the HMT140 for the first time:
- Make sure the HMT140 Configuration Cable is disconnected from your PC.
- Open the HMT140 cover (see Opening Data Logger Cover).
- Make sure the power switch on the device is in the OFF position.
Install 3 × 3.6 V lithium batteries as indicated in Figure 1.
Use only batteries recommended by Vaisala (see HMT140 User Guide, M211488EN).
- Turn the power switch on the device to the ON position, and wait for the setup process to complete (5 seconds).