Install HMP155 on a support arm approximately 2 m (7 ft) from the ground.
| In airport applications, the humidity and temperature probe must be installed exactly 2 m (7 ft) from the ground. |
You can install the optional T‑probe inside radiation shield DTR13 with HMP155.
| WARNING Do not perform installation or maintenance procedures when there is a risk of thunderstorm or lightning activity in the area. |
| CAUTION The radiation shield is important in protecting the sensor head from rain and splashing water and must always be used. |
| To prevent corrosion, oxidation, and seizing, use a non‑conductive, non‑water‑soluble, non‑silicone‑based grease, such as ceramic or Teflon paste, between different kinds of metal. |