Calibration and scaling (0x382199, 0x302199)

Vendor calibration, index 0x80A0:0B, 0x80AF:01, 0x80AF:02

The vendor calibration is enabled in the factory setting. It can be disabled via index 0x80A0:0B "Enable vendor calibration".

The parameterization of the vendor calibration is carried out via the indices:
0x80AF:01 (offset vendor calibration) and 0x80AF:02 (gain vendor calibration).

Calibration and scaling (0x382199, 0x302199) 1:

Vendor calibration

  • If you use the user calibration, it may be a good idea to disable the vendor calibration.
  • The vendor reserves the right to carry out the basic calibration of the terminals. Therefore, the vendor calibration cannot be changed.

User calibration, index 0x80A0:0A, 0x80A0:17, 0x80A0:18

The user calibration is disabled in the factory setting. It can be enabled via index 0x80A0:0A "Enable user calibration".

Parameterization is carried out via the indices
0x80A0:17 (offset user calibration) and 0x80A0:18 (gain user calibration).

Notice

The user calibration affects the measuring range monitoring.

Incorrect calibration coefficients can lead to the Status bits and Status LEDs no longer behaving as expected; see Measuring range monitoring.

User scale, index 0x80A0:01, 0x80A0:11, 0x80A0:12

The user scale is disabled in the factory setting. It can be enabled via index 0x80A0:01 "Enable user scale".

Parameterization is carried out via the indices:
0x80A0:11 (offset user scale) and 0x80A0:12 (gain user scale).

Correction calculation

The terminal constantly records measured values and saves the raw values from its A/D converter in the ADC raw value object 0x80nE:01. After each recording of the analog signal, the correction calculation takes place with the vendor and user calibration data as well as the user scale, if these are enabled.

Calibration / scaling

Status

Correction function

Meaning

Vendor calibration

active (default):
0x80A0:0B = TRUE

YH = (XADC – BH) x AH x 2-14

YH: Measured value after vendor calibration with:
BH: Offset vendor calibration (0x80AF:01)
AH: Gain vendor calibration (0x80AF:02)

Disabled:
0x80A0:0B = TRUE

YH = XADC

User calibration

active:
0x80A0:0A = TRUE

YA = (YH – BA) x AA x 2-14

YA: Measured value after vendor and user calibration with:
BA: Offset user calibration (0x80A0:17)
AA: Gain user calibration (0x80A0:18)

Disabled (default):
0x80A0:0A = FALSE

YA = YH

User scale (user calibration)

active:
0x80A0:01 = TRUE

YS= YA x AS x 2-16 + BS

YS: Measured value after user scale with:
BS: Offset user scale (0x80A0:11)
AS: Gain user scale (0x80A0:12)

Disabled (default):
0x80A0:01 = FALSE

YS= YA