Section 1 Introduction; Controller Cover; Front Panel - Hach 900 MAX Instrument Manual

Section 1

1.1 Controller Cover

1.2 Front Panel

Figure 1 Front Panel
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7
1. Soft Keys
2. Manual Mode Key
3. Run/Stop Key
4. Power ON Key
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Introduction
The controller is mounted on top of a specially designed refrigerator. The
sample line passes through the top of the refrigerator and into the refrigerated
compartment where the sample containter(s) are located. The compartment
is surrounded by rigid foam insulation and utilizes a 120 CFM condenser fan.
An optional controller cover locks and protects the controller from damage
and unauthorized users.
Sample temperature is controlled by an adjustable air sensing thermostat
maintaining samples at 4 °C (39 °F) in ambients up to 50 °C (120 °F). The unit
has a magnetic door seal and does not require rear ventilation. The
refrigerator interior is food grade plastic and the exterior is coated galvanized
steel (304 stainless steel is optional). As a further barrier against corrosion,
the refrigeration components and copper plumbing are treated with phenolic
resin coating.
The front panel (Figure 1) of the sampler consists of the keypad, liquid crystal
display, and the internal case humidity indicator.
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5
5.
6.
7.
8.
Power OFF Key
Main Menu Key
Status Bar
Menu Bar
1
2
3
4
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Introduction