Humidity Cabinet
39-1300, 39-1601
7
9907X0093 Issue 3
4
Humidity Control
A wide range of fixed and relative humidities can be achieved by adding a suitable
saturated salt solution to the base of the chamber. The relative humidity of air in
contact with saturated salt solutions reaches known equilibrium values at certain
temperatures.
Salts Graph
The graph above shows the temperatures and relative humidities for several of the
more common saturated salts. The distilled water/saturated salt solution should be
topped up regularly and should fully cover the floor AND high humidity element at all
times.
4.1
High Humidity Option
A high humidity level of approx. 98%RH is maintained by placing distilled water in the
base of the chamber and switching the HIGH HUMIDITY switch ON.
Do not use the HIGH HUMIDITY switch unless the floor of the chamber
is fully covered with water. It is essential that the heating element on
the chamber floor is covered at all times. This must be checked daily.
4.2
Allow the chamber humidity to stabilise before putting your products into the chamber.
5
Maintenance
No routine maintenance is necessary but regular cleaning of the inner chamber is
essential.
5.1
Keep ventilation grilles clear and unobstructed.
