# Scales · class IIII, test load 401 + e, maintenance tolerance — Accuracy classes and maximum permissible errors for trade measuring instruments

For Scales, condition is class IIII, test load 401 + e, maintenance tolerance; accuracy class is IIII; maximum permissible error is 5; scope or member state option is The acceptance tolerance values shall be one-half the maintenance tolerance values, recorded from its source on 2026-10-13.

- **Instrument type:** Scales _(verified: appears in its own passage below)_
- **Accuracy class:** IIII _(verified: appears in the quote below)_
- **Condition:** class IIII, test load 401 + e, maintenance tolerance _(our reading, not quoted from the source)_
- **Maximum permissible error:** 5 _(verified: appears in its own passage below)_
- **Scope or member state option:** The acceptance tolerance values shall be one-half the maintenance tolerance values. _(verified: appears in its own passage below)_

## What the source says

**Accuracy class:** The source prints this value inside the passage below but does not name it there. The passage shows where it appears; what ties it to this record is the position on the page, not anything the passage says.

> Table 6. Maintenance Tolerances (All values in this table are in verification scale intervals (e)) Tolerance 1 2 3 5 Class Test Load Applied I 0 to 50 000 50 001 to 200 000 200 001 + II 0 to 5 000 5 001 to 20 000 20 001 + III 0 to 500 501 to 2 000 2 001 to 4 000 4 001 + IIII 0 to 50 51 to 200 201 to 400 401 +

## Where each value comes from

This source states these in separate places, so each value is shown with the passage that states it.

### Instrument type

> Section 2.20. Scales A. Application A.1. General. – This code applies to all types of weighing devices other than automatic bulk-weighing systems, belt-conveyor scales, and automatic weighing systems.

### Maximum permissible error

> Table 6. Maintenance Tolerances (All values in this table are in verification scale intervals (e)) Tolerance 1 2 3 5 Class Test Load Applied I 0 to 50 000 50 001 to 200 000 200 001 + II 0 to 5 000 5 001 to 20 000 20 001 + III 0 to 500 501 to 2 000 2 001 to 4 000 4 001 + IIII 0 to 50 51 to 200 201 to 400 401 +

### Scope or member state option

> T.N.3.2. Acceptance Tolerance Values. – The acceptance tolerance values shall be one-half the maintenance tolerance values.

## Source

- https://www.nist.gov/document/2026-nist-handbook-44-section-220

Last verified: 2026-10-13. Review by: 2027-10-13.
Part of [Accuracy classes and maximum permissible errors for trade measuring instruments](https://referencesource.org/legal-metrology-accuracy-classes/).