Hach 900 manual Section, Front Panel, Keypad and Display, Humidity Indicator, Interface Connectors

Models: 900

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Section 2

Section 2

Figure 1 Interface Connectors

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1.12 V dc

2.Auxiliary

2.3 Front Panel

The front panel consists of the keypad, liquid crystal display, and the internal case humidity indicator (Figure 2).

2.3.1 Keypad and Display

The sampler controller is equipped with a 24 character alphanumeric liquid crystal display which automatically steps the user through the program settings.

2.3.2 Humidity Indicator

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 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. See to section 5.8 on page 35 for details.

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Front Panel

8544intro.fm

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Hach 900 manual Section, Front Panel, Keypad and Display, Humidity Indicator, Interface Connectors

FAQ

What is included in the front panel of Hach 900?

The front panel consists of the keypad, liquid crystal display, and the internal case humidity indicator.

How does the humidity indicator work?

The internal case humidity indicator turns pink when the internal case humidity exceeds 60%. It is equipped with an internal desiccant module to absorb any trapped humidity.

When is replacement of the desiccant module necessary?

Replacement is necessary if the humidity indicator turns pink. Refer to section 5.8 on page 35 for details.