Part 2, Section 8: IPO-8: Crane Scales
Application
Mechanical, electronic or hydraulic single point suspended scales with a capacity exceeding 1000 kg (2000 lb).
Equipment
Inspector's weight kit, local standards of sufficient number and capacity, material for strain load testing, and means of suspending standards.
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)
Device is sealed (NoA, STP-4)
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)
Load receiving element can be observed from indicator's reading position
Clearance around load receptor
Device is adequately protected
Adequate facilities to apply test standards or test product are provided
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 — Indicating element (STP-5)
(Electronic)
Display Test (Segment)
Indicated and recorded values are adequately defined
Defining words and symbols for annunciators (Tare Entered, Gross and Net Weight, Center-of-Zero) are readable
(Mechanical)
Scale marks, pointers and poise are in good condition
Defining words and symbols are readable
Zero setting material is enclosed and secured
Balancing ball is in good condition and secured in place
Visual Examination — Recording Element (Printer) (STP-6)
Device prints the required values
Printed values are adequately defined
Device Configuration (Electronic)
Device configured as prescribed by the NOA (STP-2)
Zero Setting Mechanism Range ( 4% of Max or more) (STP-8)
Initial Zero Setting Mechanism Range (20% of Max or more) Footnote 1
AZTM Maximum Range (0.6 e)
Manual Entries of Gross Weights (STP-9) Footnote 1
Sleep Mode Test (STP-10) Footnote 1
Tare (Platter, Keyboard, and Pre-programmed Tare Entry) (STP-11)
Free Floating Weight Signal (STP-12)
Performance
Load Discrimination Test (Near Zero) (STP-14)
Increasing Test and Strain Test (STP-13)
Load Discrimination (Max) (STP-14)
Agreement of Registration (STP-17)
Display Blanking Tests (Zero, Tare) (STP-18)
Decreasing and Return-to-Zero Test (STP-13)
Repeatability Test (STP-16)
Motion Detection Test (STP-19)
Accuracy of Price Computation (STP-20)
Mathematical Concordance of Tare, Net and Gross Weight (STP-21)
Disturbance Test (Electromagnetic Interference and Radio Frequency Interference, Vibrations). (STP-23)
Revision
Original document
Footnotes
- Footnote 1
-
Tests performed at the initial inspection only.