Hach-Lange SIGMA SD900 Refrigerated Sampler and All Weather Refrigerated Sampler User Manual - Manual (Page 19)

17
General Information
Controller
The controller is located on top of the refrigerator. Use the controller
to program the sampler and for manual operation. The controller
contains the following components:
• Pump—operates in the forward or reverse direction to
collect a sample, rinse and purge the intake tube.
• Liquid sensor—allows the sampler to dispense accurate
sample volumes into the sample bottle(s). Can be
calibrated to specific sample conditions in the field.
• Cable connectors—for power, flow meter, communication,
thermal (AWRS only) and SDI-12.
• Desiccant—absorbs internal moisture in the controller and
prevents corrosion
2.2.1.1 Controller cover
Refrigerated Sampler
An optional controller cover (Cat. No. 8963) locks and protects the
controller from damage and unauthorized use.
All weather refrigerated sampler
The insulated, lockable top cover protects the controller
compartment from extreme weather as well as unauthorized use. A
heavy-duty perimeter gasket provides additional protection against
various environments and insects. The lock can be engaged when
the door is open, and does not require a separate padlock or key
(
Figure 5 on page 18 ). The lock option (5697700) can be factory or
field installed.