17
Section 3
Introduction
The sampler is housed in a low-density polyethylene molded cabinet which is designed
for indoor or outdoor locations. No secondary enclosure is required. The refrigeration
compressor is located on top of the sampler to avoid hydrogen sulfide and other
corrosive, heavier-than-air gases. The microprocessor in the sampler controller runs all
refrigeration and heating operations directly without relying on mechanical thermostats.
No mechanical thermostat adjustments are required. All temperature settings, setup, and
calibrations are performed via the front panel.
3.1 Controller cover
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 from the environment and insects. The lock option (5697700) can be either
factory or field installed. The lock can be engaged when the door is open; it does not
require a padlock (
).
Figure 2 Controller lid
1
Strike plate on lid
3
Lock handle
2
Controller cover
4
Lock
Goodnal STP ST041 Pre Treatment (Sigma 900 MAX All Weather Refrigerated Sampler) Vendor Manual
Q-Pulse Id VM373
Active 29/10/2013
Page 17 of 122
