A Dry Well calibrator is more than a stable heat source for temperature calibration instruments. A reliable heat source must verify the accuracy if your company has any industrial temperature sensors. Dry Well calibrators are critical instruments in calibration and keep your lab operating at top efficiency.
What is a Dry Well Calibrator?
A Dry Well calibrator is a powerful heat source with a well where a temperature probe can be inserted. The sensor readings can be compared to the dry well’s set temperature or to a calibrated reference thermometer.
Also known as a Dry Well calibrator or a dry-block calibrator, it’s used in accurate calibrations of temperature devices such as resistance temperature detectors (RTD), thermocouples, thermostatic switches, thermistors, thermometers, and other temperature sensing equipment.
What You Need to be Aware of
Given the importance of Dry Well calibrators within a lab, many variables must be considered when looking at types and brands. These variables can make a difference in a laboratory’s overall function and can determine the quality of services.
When the initial review of options, the preferred Dry Well calibrators must start with superior performance that is stable, accurate and has optimum speed, radial, and axial uniformity.
Be aware that some Dry Well manufacturers don’t calibrate the display; instead, they give you the “potential” calibration accuracy.
Various manufacturers calibrate displays and print specifications for display accuracy; however, they don’t include a traceable calibration report with the Dry Well.
Additel Expanded on Traditional Dry Well Calibrators Technology
Additel understands the importance of Dry Well calibrators within the science community and created improvements that improve the work and increase lab productivity.
The ADT 875-155 design has a patented heat pipe technology that significantly reduces the time the calibrator takes to move from one temperature to the next. The speed is improved, and it reduces the number of thermoelectric modules required to reach temperatures as low as -40°C.
It can reach low temperatures, but its speed is also something to notice. The 875-155 model can move from ambient to -40°C in 20 minutes and from -40°C back to room temperature in only 5 minutes.
When using an instrument as a reference, long-term drift is a reoccurring problem with Dry Well calibrators. While an external reference probe as the standard helps diminish this problem, it is only sometimes possible within applications. Internal sensors on traditional Dry Well calibrators have an overall accuracy contributing to drift. However, Additel created a built-in self-calibration feature to run an automated calibration that gives a fresh, traceable calibration of the control sensor, improving its accuracy, thus, solving the long-term drift issue.
The 875 Series of Dry Well Calibrators
The Additel 875 series of Dry Well calibrators offer specific options based on your needs.
One significant difference in the models is that ADT875-155 covers a range of -40 – 155°C, ADT875-350 covers 33 – 350°C, and ADT875-660 covers a range of 33 – 660°C. Additel offers the ‘Choose Your Range Option .’ This option allows a lab to choose the upper and lower temperature range needed, and the engineers calibrate and optimize the dry well’s performance over your selected field. Thus, fixing the common problems labs have when purchasing a new dry well.
If you want to learn more about the Additel Dry Well Calibrators, SRP control systems can help.