Teledyne Everywhereyoulook BLZZRD, Installation And Operation Manual

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BLZZRD ™ Portable Refrigerated Sampler
Section 9 Maintenance
9-12
9.6 Replacing the
Desiccant
A humidity indicator, labeled “INTERNAL CASE HUMIDITY,” is
located to the right of the keypad. It indicates the amount of
moisture present inside the control box. The paper indicator is
blue
when the control box is dry.
The control box is a completely sealed unit. You do not need to
open the control box during normal operation. The 6712 Sam-
plers use a desiccant bag inside the controller case to prevent
moisture damage to its electronic components. Thus, the
humidity indicator should remain blue under normal conditions.
If moisture does accumulate, the numbered areas on the indi-
cator will turn light
pink
or
white
, starting with the area num-
bered “20.” This indicates that the relative humidity inside the
control box exceeds 20%. As more moisture accumulates, the
areas numbered “30” and “40” will turn light pink or white, indi -
cating relative humidities of 30% and 40% respectively.
If the 30% area of the humidity indicator turns light pink or
white, open the control unit, inspect it for leaks, and replace the
desiccant bag.
CAUTION
Do not attempt to reactivate the used desiccant. Reactivation
may cause desiccant to leak out of the bag, causing mechani-
cal damage inside the controller.
Follow the instructions in Section 9.5 to open the controller.
Remove the bag from the cardboard box at the front of the case.
Figure 9-5 Desiccant location
Desiccant Box