User Manual

LOSS-OF-WEIGHT
_
Systems
Installation and Operating Instructions
Metalfab, Inc. Vernon, NJ 07462 Phone [phone] Fax [phone] [e-mail]
Contents:
• GENERAL DESCRIPTION
• INSTALLATION
• MAINTENANCE
• DISASSEMBLY
• ASSEMBLY
• ENGINEERING DATA
• Load Cells
• Weigh Instruments
• Measuring Accuracy
• BATCH CONTROL
• CONTINUOUS CONTROL
GENERAL DESCRIPTION
When a process requires accuracies greater than 1 to 1 1/2% or it is necessary to record actual feed rates, feeding by
weight loss is the only method. Required rates are actually monitored by a scaling system in conjunction with either a
batch or continuous controller. Weight of product being delivered is continuously monitored against weight required.
INSTALLATION
Even though we have designed our LOSS-OF-
WEIGHT ® weigh assembly with stops, you can
permanently damage the load cell if you drop,
overload or allow anything to impact the scale. Care
should be taken to eliminate these occurrences.
The bin activator should be located in an area with
minimal traffic or disturbances and mounted on a stable
and level support. After placing the bin into position,
remove the shipping clips from the upper and lower
weighing deck. The weigh deck’s corner and load cell
stops were adjusted during assembly and should not
be field adjusted.
Use the wiring schematic supplied with the LOSS-OF-
WEIGHT® system’s NEMA 4 enclosure and make your
connections to the load cell terminals.
If you did not purchase our optional inlet and outlet
sleeves, connect the upstream and downstream
equipment with flexible connections. We recommend a
thin natural rubber or similar type material be used with
enough slack to prevent mechanical sticktion. The more
flexible the connections are, the better the accuracy you
can achieve.
Note: There should be no rigid connections between
earth and the LOSS-OF-WEIGHT ® feeder scale
platform.
INSTALLATION AND OPERATING INSTRUCTIONS METALFAB BIN ACTIVATOR