Calibration is defined as an operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a measurement result from an indication.

Simply put in metrology, calibration is the comparison of measurement values delivered by a device under test with those of a calibration standard of known accuracy. Such a standard could be another measurement device of known accuracy, a device generating the quantity to be measured such as a voltage, a sound tone, or a physical artifact, such as a meter ruler.

SI Calibration is currently accredited to ISO17025 in the following measurement disciplines:

  • Temperature Calibration

As a part of our commitment to continuous improvement we will continue to broaden our scope in the above fields and add new disciplines to our offering.

We are able to offer calibrations in our lab as well as onsite.

For any assistance with calibration in the above mentioned disciplines please do not hesitate to contact us.

Temperature Mapping

A temperature mapping exercise while being a requirement for any space allocated for the storage and handling of products with a specified labelled storage temperature, can also be advantageous in extending shelf life in perishable products and avoiding losses of stock due to storage in areas where potential pockets of temperatures that fall outside of the specified storage temperatures are located. This includes warehouses, freezer rooms, cold rooms, temperature-controlled storage areas, quarantine areas and receiving and loading bays, and may also include laboratories. The permitted temperature ranges in these areas will vary – for example: -25°C to -10°C, 2°C to 8°C, 15°C to 25°C, etc. Temperature mapping may also need to be carried out in spaces without active temperature control.

A mapping study establishes the temperature distribution within the zone being mapped and it locates hot and cold spots. The collected data provides an essential source of information to ensure that all time and temperature-sensitive products are correctly stored within their labelled temperature range(s).

 Mapping may also be used to identify zones where remedial action needs to be taken; for example by altering existing air distribution to eliminate hot and cold spots, or by retro-fitting new air distribution equipment to reduce temperature stratification in high-bay warehouses, high bay pallet racking stores are particularly susceptible to temperature stratification and such stores must be comprehensively mapped over their full working height.

A temperature mapping exercise involves a four-stage process, as follows:

  1. Prepare a mapping protocol.
  2. Carry out the mapping exercise.
  3. Prepare a mapping report.
  4. Implement the recommendations by carrying out the remedial and other actions identified in the mapping report. A follow-up mapping exercise may then be needed to verify the effectiveness of the remedial actions.

SI Calibration conducts temperature mapping based on guidelines and recommendations set out by the World Health Organisation.

Qualification / Validation

Validation is Documented testing performed under highly controlled conditions, demonstrating that processes, methods, and systems consistently produce results meeting predetermined acceptance criteria.

Qualification is an inspection and testing process used to establish that a piece of equipment or a physical installation is fit for the purpose in the operational context within which it will be used. There are typically three stages in the process. Each stage must be fully completed before the next one begins.

Design Qualification (for equipment): Establish by laboratory testing under tightly controlled conditions that a specific item of equipment performs in accordance with the user requirements specification (URS). Although design qualification demonstrates compliance with the URS and associated test protocols, it does not prove that the equipment will be suitable in a specific operating environment because the URS and the test procedures are unlikely to reflect the full range of operating conditions.

Installation Qualification (for installations): Establish by documented inspection and testing that an installation that has been assembled in a specific location is fully in accordance with the URS and installation drawings.