Apparatus and method of testing an object within a dry gas environment

An apparatus for testing an object, the apparatus comprising:

• a test chamber;
• a test board for testing an object, the test board disposed within the test chamber;
• a first chamber adjacent to the test chamber with a lower surface of the test board exposed to the first chamber;
• a second chamber at least partially surrounding the first chamber and isolating the first chamber from ambient air;
• a compressor configured to supply dry gas to both the first chamber and the second chamber;
• a first gas line connected between the compressor and the first chamber;
• and
• a first valve disposed at the first gas line and configured to control the supplying of the dry gas to the first chamber;
• a first humidity sensor disposed in the first chamber and configured to measure a first humidity in the first chamber;
• a first controller configured to control the first valve in accordance with the first humidity in the first chamber measured by the first humidity sensor;
• a second gas line connected between the compressor and the second chamber;
• and
• a second valve disposed at the second gas line to control the supplying of the dry gas to the second chamber.