Part 2, Section 4: IPO-4: Steel Yard Scales
Application
Mechanical steel yard type scales including double beam hanging scales
Equipment
Inspector's weight kit, local standards in sufficient number and capacity, and weight suspension equipment.
Use
Device is approved for trade use: NoA, Act Section 8
Device is suitable for the actual use: STP-1
Device has been initially inspected (if applicable) and bears the initial verification marks: R.29
Visual Examination — Installation and Location : STP-7
Device is installed in accordance with restrictions and conditions listed in the notice of approval and in accordance with manufacturer's instructions
Device is adequately supported
Device indicating and load receiving elements are positioned for customer's view (if applicable)
Clearance around load receptor
Device is properly levelled
Device is adequately protected
Visual Examination — Marking: STP-3
Device is marked with the required information
Marking is located as required
Marking is permanent (if applicable)
Marking plate is permanently attached to the device
Visual Examination — Beam, poise, and zero setting mechanism: STP-5
Weight values are adequately defined
Scale marks and numbering are clear and readable
Poise is clean; no part has been lost;
Poise adjusting material is enclosed and held firmly in position
Poise indicating component is in good condition and allows for accurate readings
Material for setting zero is enclosed and secured
Balance ball assembly is held firmly in position
Performance
Load Discrimination Test (No Load): STP-14
Increasing Test: STP-13
Eccentricity Test (not required on beam-over-pan scales): STP-15
Load Discrimination (Max): STP-14
Decreasing and Return-to-Zero Test: STP-13
Repeatability Test: STP-16
Revision
Original document