Version 1.6.1
David Trew
Consulting Ltd
Management of Equipment in an ISO/IEC 17025:2017 Accredited Laboratory
Part 1: Classifications of Laboratory Equipment
The risks associated with laboratory instrumentation usually increase significantly as the complexity of the instrumentation increases. Thus, the effort required to provide the required level of confidence that the instrument can provide valid results is often dependent on the complexity of the respective equipment. Therefore, classifying instrumentation according to its complexity will ensure that instrumentation of similar complexity is calibrated and maintained to a level that is constantly consummate with risks associated with the instrument.
The scheme presented here is particularly useful in laboratories carrying out physical testing or calibrations.
1. Category 1 includes standard equipment with no measurement capability but are used to establish a reference standard. Examples of equipment in this category are standard weights used to calibrate balances and fixed-
2. Category 2 includes standard equipment and instruments that are capable of measurement but have no capacity for adjustment. Examples of equipment in this capacity include platinum resistance thermometers and float densitometers.
3. Category 3 includes commercial off the shelf equipment that is either:
i. Firmware controlled
ii. Controlled by software with limited functionality and internal to the equipment
iii. Capable of independent adjustment in order to conform to specifications
iv. Does not have a computer with a full operating system controlling the system
Examples of equipment in this category include: a precision thermometry bridge, pH meter, laboratory balance.
4. Category 4 includes commercial off-
5. Category 5 includes commercial off-
When a new instrument is added to an existing network, such as adding a new HPLC to an existing data collection network, a question that can arise is should this be treated as a category 5 instrument or some other category that is determined by the characteristics of the instrument, as if it was not connected to the network, for example, an unnetworked HPLC is a category 4 instrument, but should it be treated as a category 5 instrument if it is added to an existing network of instruments? This needs to be clarified in the respective standard operating procedure. There are several potential solutions to this type of scenario. Probably the easiest is to apply change control procedures and/or establish a process addressing the addition of new instruments and sensors to the respective network when it is first installed.
6. Category 6 includes all bespoke equipment.
This system applies to laboratories that carry out chemical testing.
1. Category 1 includes standard equipment with no measurement capability or usual requirement for calibration. Examples of equipment in this group are nitrogen evaporators, magnetic stirrers, vortex mixers, and centrifuges.
2. Category 2 includes standard equipment and instruments providing measured values and equipment controlling physical parameters (such as temperature, pressure, or flow) that need calibration. Examples are balances, melting point apparatus, light microscopes, pH meters, variable pipets, refractometers, thermometers, titrators, viscometers, muffle furnaces, ovens, refrigerator-
3. Category 3 includes instruments and computerised analytical systems, where user requirements for functionality, operational, and performance limits are specific for the analytical application.
4. Category 4 includes all networked or customised instruments and customised analytical systems. The comment discussed category 5 equipment in Section 2.2 also apply here.
5. Category 5 includes all bespoke equipment
All equipment with associated software shall be allocated a software category according to the following criteria:
1. Category 1 Infrastructure Software. This includes:
Operating systems
databases
programming languages
middleware
office software
statistical programming tools and spreadsheet packages.
network monitoring software
anti-
backup
help desk
IT configuration management tools and other network software
2. Category 2 Firmware; This is software embedded into a piece of laboratory equipment, such as laboratory balances, pH meters or digital thermometers, to make it work.
3. Category 3 Non – Configured Software: This software can be installed and can operate without modification. Included in this is the software that controls much of the analytical equipment used in the laboratory, such as spectrophotometers and chromatographs.
4. Category 4 Configured Software: This software can be configured by the user to optimise its performance to meet the user’s requirements. Included in this is software that controls networked equipment and data collection and monitoring systems. Also included in this category are configured Excel spreadsheets not containing macros.
5. Category 5 Custom Software: This is software that has been developed and written for a specific organisation and purpose, including applications containing a configuration or scripting language that allows the user to modify a program’s functions and includes macros for Microsoft Office applications.
1. ISO/IEC 17025:2017 General Requirements for the Competence of Testing and Calibration Laboratories. International Organisation for Standardisation, Geneva, 2017
2. UKAS Guidance LAB 11 Traceability of Temperature Measurement: Platinum Resistance Thermometers, Liquid-