Hibring
ESEN

Instrumentation and data

Signal validation

We assess what instruments represent and what information is missing to reconstruct an operating event.

When it applies

Trends appear coherent but do not agree with field observations.

Ask about this scope

Starting information

  • Signal list, units and sampling frequencies
  • Calibration and maintenance records
  • Historical data and observations from the operating team

Proposed work

We review synchronisation, availability, drift and relationships between signals. We compare questionable periods with available maintenance records, balances and field observations.

Deliverable

A signal map identifying usable intervals, limitations and priorities for instrument verification.

Plant trials, equipment installation and control changes require a specific scope and authorisation. This description does not replace operating procedures.

Knowledge

Related reading

Instrumentation and data 3 min

The sensor seemed to be working

A signal can respond to process variations and maintain a reasonable appearance while the instrument's physical condition changes slowly. Build-up, drift, loss of calibration or an installation condition can shift…

Published

Instrumentation and data 2 min

The process historian is not the plant

A historian stores values and timestamps. It does not necessarily store the operating regime, instrument condition, disturbances, manual actions or constraints that explain those values.

Published