The major prerequisites of efficient online analyzers are:
- Should be capable of operating un-attended over a prolonged period of time.
- Should produce analytically valid results with precision and repeatability
- The instrument/analyzer should be robust and rugged, for optimal operation under
- extreme environmental conditions, while maintaining its calibrated status.
- The analyzer should have inbuilt features for automatic water matrix change adaption.
- The instrument/analyzer should have onboard library of calibration spectras for different
- industrial matrices with the provision of accumulating further calibration matrices.
- Should have data validation facility with features to transmit raw and validated data to
- central server.
- Should have Remote system access from central server provisioning log file access.
- Should have provision for Multi-server data transmission from each station without
- intermediate PC or plant server.
- Should have provision to send system alarm to the central server in case any changes made
- in configuration or calibration.
- Should have provision to record all operation information in log file.
- Should have provision for independent analysis, validation, calibration & data
- transmission.
- Must have provision of a system memory (non-volatile) to record data for at least one
- year of continuous operation.
- Should have provision of Plant level data viewing and retrieval with selection of ethernet,
- wireless, Modbus & USB.
- In case of TOC analyzer, the empirical relationship between TOC to COD or BOD must be
- authenticated for all industrial applications and the correlation calculation (for factor)
- shall be provided.
- The correlation/interpretation factor for estimating COD and BOD using UV-Visible
- Absorption Technique shall be regularly authenticated/ validated and details should be
- transmitted online.
- That the Record of calibration and validation should be available on real-time basis on
- central server from each analyzer.
- Record of online diagnostic features including sensor status should be available in
- database for user-friendly maintenance.
- Expandable program to calculate parameter load daily, weekly or monthly basis for future
- evaluation with flow rate signal input.
- Must have low operation and maintenance requirements with low chemical consumption
- and recurring cost of consumables and spares.