Hach SIGMA 900 User Manual download pdf (Page 8)

Page 8

Front Panel

8544intro.fm

Section 2

Figure 1 Interface Connectors

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.

1. 12 V

2. Auxiliary

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Hach SIGMA 900 User Manual Page 8