5128A
Operators Manual
28
Desiccant Replacement
The Product uses a mixed-flow method to generate relative humidity. A desiccant
cartridge provides a source of low humidity and an internal humidifier generates
high humidity. Check the desiccant cartridge when the
Check Desiccant
indicator is lit on the front panel or the display shows
. The normally-
blue desiccant material is pink when it becomes saturated. When the entire
normally-blue desiccant material is pink, the cartridge should be replaced. See
Display and Control Panel
.
To change the desiccant cartridge (see Figure 5):
1. Turn the Product off.
2. Turn the front panel cap ¼ turn counter-clockwise and remove the cap.
3. Loosen the rear seal of the desiccant by gently nudging the front of the
desiccant in various directions (up/down, left/right).
4. Pull the spent cartridge out of the Product and insert a new cartridge.
Additional desiccant cartridges are available from Fluke Calibration.
2
3
ibw026.eps
Figure 5. Change the Desiccant Cartridge
