Chapter 3 – Operation
Page 16
TestEquity 101H Temperature/Humidity Chamber
Make sure that all connectors, wiring, pc boards, and auxiliary components can withstand the
temperature extremes that they will be subjected to. In some cases, these components may not be
able to last after repeated tests and should be considered expendable.
Humidity Operation
Humidity Mode Enable
The Humidity mode is enabled through the Humidity button on the F4T Controller. This mode
should only be ON if you are performing a controlled humidity test within the temperature
humidity range of the chamber as shown in the chart below.
Standard Humidity Range
This chamber is capable of controlling humidity from 10% RH to 95% RH over the temperature
range of +10
°
C to +85
°
C. The lowest possible humidity in the Standard Range is limited to a
6
°
C dew point.
Examples of 6
°
C Dew Point Limit in the Standard Humidity Range
10
°
C 76%
20
°
C 40%
45
°
C 10%
Below is a chart that shows the achievable range of humidity as compared to temperature. For
extended low humidity range below 6
°
C a dew point condition, see “Purge Option” which
follows.
NOTE: Achieving low humidity levels require you to start with a clean, dry chamber.
Achievable Range of Temperature/Humidity Conditions
Temperature Range for Controlled Humidity
If the chamber is outside the temperature range or +7
°
C and +90
°
C, the humidity system will be
disabled and chamber will operate as though the F4T Humidity button was OFF, even if
Humidity button is ON.
