User guide

AccuMeter Controller Chapter 2: Functional Description 17
level alarm to be wired into a separate controller. These would not be present on a standard
blender.
The hoppers may be equipped with a polycarbonate sight glass. This is mounted in the upper
cone section of the hopper. This is useful for a quick reference of the material level in each
hopper.
The supply/re-fill hoppers should be vented to the atmosphere through the louver located on the
lid of each hopper. This louver is required to prevent the loading system from creating a
vacuum in the hopper, which would prevent material from flowing out properly. This situation
could be caused by a leaking discharge seal on the vacuum receiver.
Ingredient Weigh Hoppers
Each ingredient weigh hopper assembly consists of a conical mass flow weigh hopper, a
precision load cell and a discharge tube disc seal. A mass flow weigh hopper is a steep degree
conical hopper with vertical side walls with a discharge tube on the bottom. Each weigh
hopper is sized to the blender ingredient metering requirements. This assembly is responsible
for weighing the material ingredients as they are metered out by the metering auger assemblies
located below each weigh hopper. The manufacturer believes this is the best way to weigh free
flowing pelletized materials. This design allows the hopper to weigh only the material and
nothing else, unlike other systems that weigh the heavy auger assemblies. This design
eliminates extra variables, such as auger drive vibrations, etc. from the weighing system and
increases the load cell resolution. Each weigh hopper will be refilled periodically as material
reaches the preprogrammed low weight setpoint for that hopper. Clear hopper side walls or
sight glasses are provided on each on the weigh hoppers to allow the operator to monitor the
levels.