Section 4: Binary data section
| Octets | Key | Type | Content |
| 1-3 | section4Length | unsigned | Length of section |
| 4 | dataFlag | codeflag | Flag (see Code table 11) (first 4 bits). Number of unused bits at end of Section 4 (last 4 bits) |
| 5-6 | binaryScaleFactor | signed | Scale factor (E) |
| 7-10 | referenceValue | real | Reference value (minimum of packed values) |
| 11 | bitsPerValue | unsigned | Number of bits containing each packed value |
| 12-nn | Variable, depending on the flag value in octet 4 |
( 1) A negative value of E shall be indicated by setting the high-order bit (bit 1) in the left-hand octet to 1 (on).