A & A Scales PT300, Service Manual, Page: 35 / 52

PT300, Service Manual
Rev B, October, 2000
34
Unpacking and Installation
Caution:
Keep all packing materials in case scale must be shipped again. If the packing material
are lost or damaged, contact the service department for a replacement shipping carton.
Units shipped in any other materials will automatically void the warranty.
Use of a load cell simulator
During circuit board checkout it may be awkward to apply 20000 pounds to develop
internal signals. A load cell simulator may be attached to the signal and excitation
terminals to simulate these same signals. A setting of 2 mV/V gives about the same
signal as a 20000 Lbs load.
Complete list of required tools and materials
In addition the usual workbench and good lighting, the following list of tools and
materials would be necessary to set up a complete PT-300 service station.
Twenty thousand pound calibration press.
1.5" x 1.75" x 12” aluminum loading block.
8" x 8" x 1.75" aluminum loading block.
8" x 8" x 0.5" rubber loading pad.
Static dissipation station for any P.C. board work.
#2 Phillips screwdriver for bezel and board mounts.
Torque wrench covering 12 ft-lbs.
Torx T30 bit and driver.
Small slotted blade screwdriver.
Locktite 242 removable Threadlocker (BLUE).
Locktite 262 permanent Threadlocker (RED).
Torque-seal potentiometer shaft sealer.
Dow-Corning 3145 electronic grade RTV Adhesive/Sealant.
Soldering iron and solder.
Spare parts list
These common parts can prevent "nuisance" downtime:
Fuses.
Battery pack.
To set up a "well stocked" service depot, the following parts are useful: