18
Introduction
3.2 Optional AC battery backup
The AC Battery Back Up is an enclosed 12 VDC battery designed to temporarily power a
sampler when the normal AC power source has failed. The backup battery charge is
restored and maintained by normal operation of the sampler AC power supply.
In the event of a power fail, the optional battery back up will provide power to the
controller and allow the sampling program to continue running. The battery backup does
not provide power to the refrigerated cabinet. The operating temperature for the AC
battery backup is -15 to 40 ºC (5 to 104 ºF).
The battery backup can be factory or customer installed and is available in two models.
Item number 5698200 comes with a 29 in. output cable for SD900 All Weather
Refrigerated and SD900 Portable samplers.
3.3 Controller compartment heater
WARNING: Fire Hazard. Models of AWR Samplers with cabinet heaters may ignite
flammable materials and cleaning solvents. DO NOT use any flammable liquids or
materials to clean or disinfect either the Sampler or any other component under
the cabinet hood of the AWR Samplers. Before performing any cleaning operation,
disconnect the AWR Sampler from its power source. If cleaning of the sampler
controller and pump cannot be done with water, the sampler must be disconnected
and moved to a location outside of the cabinet for cleaning. Allow sufficient time
for the sampler controller / pump to dry before reinstalling and putting it back into
service. Do not attempt to clean the controller compartment heater by spraying it
with liquids. Protect the heater from moisture such as ice and snow.
The optional controller compartment heater provides several benefits in colder climates:
•
Prevents residual liquid from freezing in the pump.
•
Pump tubing stays resilient, prolonging the life of the tubing, pump rollers, motor, and
gear box.
•
Prevents ice and snow from building up on the cover.
•
Keeps LCD functional and electronics from temperature extremes.
The controller compartment heater is a factory installed option and needs to be specified
at the time of order.
3.4 Refrigeration compartment door
The lockable front door opens by pressing the round button in the center of the latch.
When closing the door, flip the latch closed to pull the door tight. Two keys are provided
for the door lock.
Since the door gasket may compress slightly over time, an adjustment screw is provided
to allow the door to be tightened. Loosen the lock nut before making adjustments and
tighten the lock nut when done (
Goodnal STP ST041 Pre Treatment (Sigma 900 MAX All Weather Refrigerated Sampler) Vendor Manual
Q-Pulse Id VM373
Active 29/10/2013
Page 18 of 122
