H300 Temperature Humidity Chamber
Page 7
•
Screw the reservoir plug until tight. The spring should compress when the plug is tight.
•
If the spring does not compress, there is not enough desiccant in the reservoir.
•
If the spring compressed too much, so that it is excessively difficult to screw the reservoir plug, there
is too much desiccant in the reservoir.
Principles of Operation
The H300 temperature humidity chamber controls the humidity by circulating the air inside the chamber
through the desiccant to decrease humidity, or through a water vapor chamber to increase humidity.
Air entering the chamber from the desiccant is very close to 0%RH. Air entering the chamber from the vapor
chamber is close to 100%RH. A fan inside the chamber mixes the dry or humid air to maintain uniform
humidity level throughout the inside of the chamber.
The humidity is controlled by regulating the amount of dry or humid air that enters the chamber.
The temperature inside the chamber is controlled using a solid state Peltier element. The chamber does not
contain any refrigerants.
Chamber Control and Operation
Summary of Operation
1.
Turn the
CONT
switch OFF.
2.
Turn the
POWER
switch ON.
3.
Enter the desired setpoints (or profile) on the PM Controller, using the Up
or Down
keys.
4.
Load your test sample in the chamber and close the chamber door.
5.
Turn the CONT switch to ON.
Controls
The H300 chamber has three switch button controls:
POWER
: Turns the chamber power On and Off.
CONT
: Turn the chamber control On and Off.
LIGHT
: Turns the LED lights inside the chamber On and Off.
The temperature and humidity set points are adjusted by setting the appropriate controller. Humidity is on
the top, Temperature is on the bottom.
