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Calibration

How To Calibrate a Thermometer in a Controlled Temperature Unit

Ellab
Ellab
15 October 2024
  • What is Thermometer Calibration?
  • Why is Regular Calibration Important?
  • How to Calibrate a Thermometer in a Controlled Temperature Unit

A reliable thermometer is essential for getting accurate temperature readings, and regular calibration helps maintain this accuracy. Accurate temperature measurements are critical in many fields including pharmaceuticals and lab research.

What is Thermometer Calibration?

Calibration is the process of checking if a thermometer is giving correct temperature readings. This is done by comparing the thermometer’s readings to a known, standard temperature. Calibration helps make sure the thermometer is as accurate as possible, with only a small difference from the real temperature. Without calibration, even small mistakes in readings can lead to wrong data or unsafe conditions in processes where temperature is important.

Why is Regular Calibration Important?

The accuracy of thermometers’ readings deteriorates over time, and their readings “drift” slightly, giving inaccurate measurements. This deterioration is caused by regular wear and tear, but it can also be the result of other environmental issues. Regularly calibrating your measuring devices would ensure your readings are correct.

Regular thermometer calibration is crucial for several reasons:

  • Accuracy: Uncalibrated thermometers can give false readings, which could affect your results or processes. In places such as pharmaceutical storage or laboratory work, even a small temperature error can lead to ruined products or inaccurate experimental results.
  • Safety: In environments where exact temperature control is needed, like cold storage or sterilization, using an uncalibrated thermometer could cause safety risks. If temperatures are outside the safe range, equipment may fail, or workers could be in danger.
  • Compliance: Many industries must adhere to regulatory standards that require accurate, traceable temperature readings. Regular calibration makes sure that your thermometer complies with these standards and can pass audits or inspections.

How to Calibrate a Thermometer in a Controlled Temperature Unit

  1. Know your Requirements: It is important to understand what temperature points you need to achieve. Depending on your industry or process, certain temperatures are critical for safety and product quality.
  2. Stabilize the Controlled Unit: Before calibration, make sure the temperature in the controlled unit is stable. Allow enough time for the environment to reach and maintain a consistent temperature.
  3. Insert the Thermometer: Place the thermometer correctly in the unit, making sure the probe or sensor isn’t too close to heat or cold sources inside the unit, such as fans or cooling coils.
  4. Compare with a Calibrated Reference Thermometer: Use a second, already calibrated thermometer to take a reading of the same space. This provides a benchmark against which the thermometer being calibrated can be measured.
  5. Record the Results: Keep a record of both the pre- and post-calibration readings. This is important for both compliance and for future reference.

At Ellab, we are dedicated to meeting your calibration needs. Whether you need help setting up your temperature-controlled units or require on-site calibration services, our expert team is ready to assist you. Our expert team can calibrate your equipment, ensuring it operates accurately and reliably.

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Trending Posts

Temperature Mapping Study: Expert Tips & Best Practices

Temperature Mapping Study: Best Practices from an Ellab Expert A successful temperature mapping study requires planning, accurate measurements, and an understanding of which factors influence temperature distribution. Every step, from sensor placement to identifying hot and cold spots, plays a role in ensuring reliable results and supporting compliance in temperature-controlled environments. What should you consider when planning a temperature mapping study, and how can you avoid common challenges that affect measurement accuracy? We spoke with Dirk Sanwald, our senior validation trainer here at Ellab, to explore the key considerations behind an effective freezer temperature mapping, including some practical tips for study prep, sensor positioning, and choosing of equipment. Dirk, what are the key aspects that need to be considered when planning a temperature mapping study of a freezer? Dirk: There are several important factors to consider, including the type and design of the equipment, its size and usable volume, and the number of levels. You also need to define the temperature range and acceptance criteria, as well as the logger placement, measurement interval, and study duration. Finally, the loading condition and operating conditions of the freezer need to be taken into account. And how do you determine the right number and position of temperature sensors for a mapping study? Dirk: The number and position of the loggers depend mainly on the size, design, and number of levels in the equipment. At a minimum, the eight corners and the center of the equipment should be monitored. It is also useful to place a logger in the center of each level. For a freezer with five levels, this results in a total of 13 loggers. When performing measurements under loaded conditions, additional loggers should be placed within a representative load. To investigate the impact of door openings on the product, a worst-case container is used. This is usually the smallest stored volume, as it reacts more quickly to temperature changes. That makes sense. How do you identify hot and cold spots, and why are they so important for temperature-controlled storage? Dirk: Hot and cold spots are identified through temperature mapping under empty conditions. We compare the temperature profiles from all measurement points to determine where the highest and lowest temperatures occur. It is important to look not only at the average temperatures but also at short-term fluctuations, for example those caused by control or defrost cycles. These areas are particularly important because they represent the highest risk of temperatures exceeding or falling below the permitted range. The identified hot and cold spots can then be used as the basis for the risk-based positioning of permanent monitoring and alarm sensors. What are some of the most common challenges engineers encounter during temperature mapping studies? Dirk: Common challenges include unsuitable placement or inadequate fixation of the data loggers, equipment that has not been fully stabilized, and loads that have not been sufficiently temperature-conditioned. Another issue can be loads that were previously stored in locations that were too warm. A lack of knowledge of the applicable SOPs can also lead to deviations during the study. The good news is that these challenges can largely be avoided through careful preparation. Logger positions and fixing methods should be defined in advance, the equipment should be given sufficient time to stabilize, and the load should be pre-conditioned under defined conditions. It is also important that everyone involved is familiar with the relevant SOPs and the test protocol before the mapping study begins. Finally, how do you select the right equipment for temperature mapping to ensure accurate and reliable results? Dirk: The equipment needs to be suitable for the expected temperature range, environmental conditions, and defined acceptance criteria. Key factors include sufficient measurement accuracy, valid calibration, an appropriate measurement interval, and enough storage capacity. It is also important to understand the planned tests and mapping protocol in advance. If measurement values need to be checked before opening the equipment, data loggers with a wireless module can be very useful. For example, they allow you to check whether the temperature has returned to the acceptance range after a door-opening test, without having to open the equipment again and potentially affecting the measurement results. Dirk, thank you very much for sharing your expertise and these great insights into temperature mapping!  Strengthen Your Temperature Mapping Strategy with Ellab Reliable temperature mapping starts with the right approach, equipment, and expertise. At Ellab, we partner with life science organizations to support temperature mapping and qualification activities through reliable validation equipment and specialized services. Whether you need accurate data loggers for your own mapping studies or expert support with qualification and validation, our integrated solutions help you manage compliance requirements, reduce operational risks, and maintain confidence in your temperature-controlled environments. Looking to improve your temperature mapping processes? Contact us today to explore how Ellab can support your validation and qualification needs.

Validation

Introducing ValSuite® 7.0: The Latest in Validation Software

Ellab is pleased to introduce ValSuite® 7.0, the latest version of our validation software, bringing new capabilities and enhancements across validation, calibration, reporting, and data management. As validation environments evolve, so do the requirements for managing data, maintaining control, and working efficiently across validation activities. ValSuite® 7.0 builds on the existing platform with updates focused on greater scalability, stronger security and compliance, faster workflows, improved regulatory alignment, and improved hardware and calibration integration. Together, these improvements provide greater flexibility across your validation environment while helping you maintain control of your processes and data. What’s New in ValSuite® 7.0? Greater scalability When your validation activities grow, the amount of data you have to manage does too. ValSuite® 7.0 supports SQL Server 2025 Express, increasing SQL Express database capacity from 10 GB to 50 GB and significantly extending system lifetime. New database naming, centralized SKY template storage, and user management capabilities also provide greater flexibility for increasingly complex ValSuite® environments. Stronger Security and Compliance ValSuite® 7.0 introduces new E-Val Pro Plus functionality to strengthen access control and data integrity. USB access can now be enabled or disabled, giving IT teams greater control over hardware access, while standalone sessions are protected from deletion until data has been successfully transferred to the database. Faster Validation Workflows New calibration, reporting, and analysis capabilities help make recurring validation activities more efficient. Enhancements include support for the new Jofra RTCt reference, multi-sensor certificate generation, dynamic setpoint adjustment, faster processing of large reports, flexible sample rates, new Set Point reporting, and reusable analysis profiles. Improved Regulatory Alignment ValSuite® 7.0 incorporates updates supporting ISO 17665:2024, including theoretical steam temperature calculations and Bowie-Dick evaluation. Mean Kinetic Temperature calculations have also been updated to support alignment with USP <1079.2>:2024, helping you keep validation activities aligned with evolving requirements. Improved Hardware and Calibration Integration The latest release brings ValSuite® and Ellab hardware even closer together. Alongside new Jofra RTCt support, updated CO₂ logger firmware enables 1-second sampling for more detailed analysis. Updates to E-Val Pro Plus and LyoPro also strengthen security, data integrity, performance, and system stability. Take Your Validation Workflows Further with ValSuite® 7.0 ValSuite® 7.0 brings software and hardware enhancements together in one validation environment, giving you additional tools to maintain control, work efficiently, and stay aligned with evolving requirements. Discover ValSuite® 7.0 and explore the latest improvements to your validation workflow.

Calibration, Validation

Test your Data Integrity with These 12 Questions

Maintaining the integrity of your data is essential when performing continuous monitoring of rooms, chambers, and storage, especially in the life science industry. Are you taking the necessary steps to protect the integrity of your data? Data integrity compliance and maintenance are the foundation for making informed decisions, protecting valuable data, and minimizing the risk of product loss. Data integrity expectations continue to evolve as GxP operations become increasingly digital. Proposed revisions to EU GMP Chapter 4 and Annex 11 reinforce the importance of managing data throughout its life cycle, with increased focus on risk-based data governance, audit trails, system security, and the oversight of computerized systems and external service providers. What is Data Integrity? The FDA describes data integrity as the completeness, consistency, and accuracy of data through its life cycle. Data integrity also encompasses the way we capture said data, how it’s transferred and stored, how we back up, archive it, or destroy it, and how it’s protected. Continuous monitoring of environments comes with tremendous amounts of data to process, so the methods for procuring, assessing, and adequate data protection are incredibly important: Accurate and reliable data capturing ensures that the information collected is precise, consistent, and ready for further processing. Effective data transfer maintains data integrity as data moves across systems and interfaces. Secure and accurate transmission, supported by two-way communication between systems to verify successful data exchange, helps prevent data tampering, loss, or incomplete transfers. Adequate data protection safeguards data from unauthorized access, including access through unauthorized equipment or systems, and ensures its integrity over time; this is vital for compliance and operational reliability. ALCOA Principles and Data Integrity This data we process should follow the ALCOA principles. According to these, data should always be: Attributable: Data should always be linked to the individual that created it or modified it, to ensure accountability and traceability. Legible: Data should be readable and understandable, to ensure accuracy when interpreted and reviewed. Contemporaneously recorded: The data should be recorded the moment it has been generated, or immediately after, to ensure relevance. Original or a true copy: Data should be kept in its original form, or if not possible, as a verified copy, to ensure authenticity and reliability. Accurate: Data should accurately reflect the observed facts, free from alterations or errors, to ensure credibility. These principles are also commonly extended through ALCOA+, which further emphasizes that data should be: Complete: All relevant data and associated information should be retained. Consistent: Data should be recorded and maintained in a logical and chronological manner. Enduring: Data should remain intact and readable throughout its required retention period. Available: Data should remain accessible for review, inspection, and audit when needed. Together, these principles provide a useful framework for maintaining reliable data throughout its life cycle. 12 Questions to Assess Your Data Integrity Compliance There are many challenges to overcome when ensuring data compliance. From human error to system failure, these issues can delay your audit readiness and increase the risk of asset loss. We have created a list with 12 questions based on industry regulations. By answering them, you can evaluate your compliance with data integrity standards: Is there an approved SOP for data review? Are data transfer interfaces secure and tamper-proof? Are data encryption and checksums in place to ensure data integrity during transfer? Is there a comprehensive migration strategy for legacy data? Are old data formats compatible or convertible to new systems? Is there a protocol for maintaining system updates? Does the system require unique identification for each user? Does the system time out after a period of inactivity? Are all data changes logged in a secure audit trail and appropriately reviewed? Is data backup performed regularly, and can it be reliably restored when needed? Are there protocols for user access levels and task segregation? Is there a regular review process for SOP compliance, system readiness, and data integrity controls? How Are Data Integrity Expectations Evolving? Data integrity remains a key focus, and while its fundamental principles haven’t changed, the systems used to generate and manage GxP data have. In 2025, the European Commission published proposed revisions to EU GMP Chapter 4 and Annex 11, introducing a stronger focus on risk-based data governance and the life cycle management of computerized systems. The proposed revisions reinforce expectations around areas such as: Computerized-system lifecycle management Quality Risk Management Data integrity controls Audit trails Electronic signatures System security Supplier and external service-provider oversight These revisions were published for consultation in 2025 and should therefore be considered emerging regulatory expectations rather than current requirements until final versions enter into force. For organizations operating GxP environments, however, they provide an important indication of how expectations around computerized systems and data governance are developing. The Role of AI in Data Integrity AI is adding an extra layer to the discussion around GxP data. The European Commission's proposed revision also introduced a new proposed Annex 22 on Artificial Intelligence, reflecting the growing use of AI and machine learning in pharmaceutical manufacturing. The draft covers several areas, including intended use, model selection and training, validation and testing, data quality, performance monitoring, change control, and human oversight. The current proposal has a defined scope and doesn’t treat all uses of AI in the same way. Organizations considering AI-supported technologies should therefore evaluate their intended use and potential impact on patient safety, product quality, and data integrity. For data integrity teams, the underlying question remains familiar: Can you understand, control, document, and review how GxP-relevant data is being used? Strengthen Your Data Integrity Approach Maintaining data requires confidence in the entire chain of information, from the moment the data is generated through review, storage, retrieval, and use. A holistic strategy combined with a proactive, data-driven approach is essential for building and sustaining a compliant environment. When you integrate risk-based mapping, routine calibration, intelligent monitoring, and empowered teams, you create a strong foundation for continuous compliance, reduced variability, and long-term operational excellence.

Monitoring

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