25-08-2017, 09:32 PM
GRAVIMETRIC DRY SOLIDS FEEDERS
Weight-Loss_2007.ppt (Size: 5.64 MB / Downloads: 61)
PRINCIPLE OF OPERATION “Weight-loss-Differential” Weigh Feeders
Appropriate Metering
Mechanism-Scale-mounted
Product discharge controlled and based on the feed rate selection
When feeders supply hopper reaches a low level, it is refilled, usually automatically
RATIOMETRIC DIGITALWEIGHT RESOLVER
Computes linear movement of scale into a true binary code
1,048,576 bits “usable” scale resolution
Unfiltered, non-amplified signal
Maximum movement=0.180”
Non-contacting, totally repeatable
Unaffected by variations in power supply (+/- 30%)
Temperature range -10° to 140°F
ACRISON WEIGHING MECHANISM
2 Scale types….Overhead and Platform. Selection based on application parameters
Weighing systems are lever mechanisms. Utilize stainless steel flexures for all pivotal connections -
Lever mechanism moves as weight is added/subtracted. Movement is sensed by weight resolver.
Weight Resolver is a displacement sensor - does not physically contact lever mechanism
Weight Resolver cannot be damaged by scale shock or overload