ETI Ice Bath Zero Celsius calibration check - A useful calibration check - Page 1
Forum section: electronics / general

author: Fraser
author_rank: Super Contributor
timestamp: December 03, 2024, 04:31:56 pm
content: For those unaware, an Ice Bath is a well known method of checking the calibration of thermometers. It may also be used to correct the calibration of electronic thermometers that permit such adjustment. Known accurate thermometers are used in thermography and in the calibration of Black Body references.I just found such an Ice Bath on eBay that is both inexpensive and easy to use. Anyone owning a freezer can make the required ice and then it is just a case of carrying out the Ice Bath test correctly. The unit I have is sold by ETI but I can now see that it is actually a repurposed 32oz insulated mug ! It is made by "Whirley Drink Works" in the USA. Whirley produces various different designs of drinking container that may be decorated with a custom design. ETI have clearly provided a decoration design that is, in fact, instructions for use of the mug as an Ice Bath. Why re-invent the wheel eh ?The printing on the mug is excellent quality and it is not just a label, it is printing direct onto the plastics surface. I was previously using a mini thermos flask as my Ice Bath but this transparent insulated mug looks better suited to the task. The clear instructions on the outside of the mug guide the user in the correct use of the Ice Bath and there are videos on the ETI web site if needed.https://thermometer.co.uk/industrial-thermometers/1198-ice-bath-mug-for-temperature-calibration.htmlI am documenting the ETI Ice Bath here only as a reference for those who have a use for such a calibration check source and who may wish to make their own version. The insulated mug is basically a double skin polypropylene container with a lid. It is not expensive from ETI but readers may find alternative insulated mugs for a DIY solution at lower cost. This Ice bath can be used to calibrate your thermocouple and RTD thermometers with relative ease so that you can have confidence in the measurements that you take.The generic 32oz insulated mug from Whirley USA may be seen here:https://www.whirleydrinkworks.com/product/32oz-thermo-mug-with-swivel-lid-and-straw/Fraser

author: Fraser
author_rank: Super Contributor
timestamp: December 03, 2024, 04:35:23 pm
content: The maker of the ETI Ice Bath "Mug"https://www.whirleydrinkworks.com/The 32oz Insulated Mug is model number: "TM-32"

author: Fraser
author_rank: Super Contributor
timestamp: December 03, 2024, 04:49:28 pm
content: The ETI and Whirley web pages....

author: tszaboo
author_rank: Super Contributor
timestamp: December 03, 2024, 05:15:36 pm
content: Just a reminder, check if your temperature probe is watertight before doing it. Don't be like some of my customers.

author: mzzj
author_rank: Super Contributor
timestamp: December 03, 2024, 05:39:15 pm
content: For further developement into thermal imaging or radiation thermometry see:NZ national measurement laboratory guide nro 2 Infrared thermometry ice pointhttps://www.measurement.govt.nz/download/18

author: Fraser
author_rank: Super Contributor
timestamp: December 03, 2024, 07:23:03 pm
content: mzzj,Thank you for the link. I have never used an ice point black body cavity and that document makes an interesting readFraser