MIL-STD-810G
Humidity


Moisture can cause physical and chemical deterioration of hardware to include corrosion and biologic growth; changes in hardware properties due to moisture penetration, and electrical or mechanical performance issues due to condensation. Typical problems that can result from exposure to a warm, humid environment include:

  • Swelling of hardware due to moisture absorption
  • Loss of physical strength
  • Changes in mechanical properties
  • Degradation of electrical and thermal properties in insulating hardware
  • Electrical shorts due to condensation
  • Binding of moving parts due to corrosion or fouling of lubricants
  • Oxidation and/or galvanic corrosion of metals
  • Loss of plasticity
  • Accelerated chemical reactions

Trimble Juno® T41 and Ranger™ 3 passed the following test:

  • • Procedure III-Aggravated: humidity tested using a humidity chamber set at 60° C (140°F) and relative humidity of 95% for 12 hours then transitioning to 30 °C (86 °F) with relative humidity of 85% for 12 hours. A total of ten cycles are conducted to complete the test

Trimble Nomad® 1050 tested at 90% relative humidity through 10 temperature cycles at -20° C (-4° F) and 60°C (140 °F).

Trimble Kenai® and Yuma® 2 tested at 90% relative humidity through 10 temperature cycles at 32 °F (0 °C) and 70° C (158° F).