3 internal humidity indicator – Hach 900 MAX User Manual

Page 19

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Section 1

Page 17

8990int.fm

Front Panel

Status Bar
The Status Bar appears along the bottom edge of the display.
The appearance of the status bar changes depending upon the
function performed (

Figure 1

). The lower left corner of the Status Bar

indicates whether a program is Complete, Running, Halted, or Ready To Start.
If it is not needed during a programming step, it disappears.

The lower right corner displays system alarm conditions, such as low memory
battery, jammed distributor etc. For a list of possible alarms refer to

section 6.4 on page 89

. The status bar also lists the valid choices when

entering certain programming information.

1.2.3 Internal Humidity Indicator

The round window of the internal case humidity indicator (Cat. No. 2660)
turns pink when the internal case humidity exceeds 60 percent.

The sampler is equipped with an internal desiccant module (Cat. No. 8849) to
absorb any humidity that may have been trapped in the case during final
assembly. Under normal operating conditions, this desiccant provides long-
term protection against condensed moisture inside the case.

Replacement of the internal desiccant module is only necessary if the
indicator turns pink. (Refer to

section 7.10 on page 103

for details on

replacing the internal desiccant.)

Figure 2

Humidity Indicator

Internal Humidity

Replace

Desiccant

When

Pink

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