Calibrating More Than Just Thermometers

While classic bimetallic-stemmed thermometers have largely given way to modern digital alternatives, the act of calibrating them remains a fundamental food safety ritual drilled into foodservice professionals from their first week on the job. However, if your kitchen’s verification strategy stops at thermometers, you leave significant blind spots in your food safety defense system.

Calibration is the process of configuring an instrument to produce results within an acceptable range. In a modern commercial kitchen, we rely on dozens of automated systems, mechanical components, and electronic meters to keep food safe and ensure sanitation compliance. If these systems drift off-target, the consequences can be disastrous. To achieve true operational control, operators must expand their scope and examine three frequently overlooked compliance areas: dish machines, chemical dispensers, and automated data loggers.

Whether you operate a high-temperature sanitizing or a low-temperature machine that uses chemical sanitizers, the built-in gauges are your only immediate window into compliance. The FDA Food Code requires that high-temperature final rinse cycles reach at least 180°F (or 165°F for stationary racks) to ensure the dishware’s surface reaches the required 160°F sanitizing threshold.

However, external mechanical temperature gauges on dish machines can easily lose calibration due to constant vibrations, scale buildup, and regular wear and tear. If a gauge displays 180°F but the water is hitting 172°F, you are inadvertently washing dishes in the danger zone. Verification requires secondary testing. Operators must regularly use single-use dishwasher testing labels that have been run through a full cycle to verify that the performance of the machine matches its readout.

In low-temperature dish machines, three-compartment sinks, and automated chemical dispensing systems, chemical concentration is a matter of balance. Too little chemical results in a failure to sanitize, leaving harmful pathogens behind. Too much chemical can result in chemical contamination of food contact surfaces, presenting a direct hazard to guests.

Automated wall-mounted chemical dispensers rely on small, internal metering tips to pull the precise ratio of water and concentrated chemical. Over time, chemical crystallization, water pressure fluctuations, and mineral buildup can alter these ratios. Relying solely on the dispenser to do its job without regular verification is a gamble. Dispensers must be checked against manual chemical test strips, and the delivery pumps must be adjusted if the parts-per-million (PPM) deviate from manufacturer and regulatory guidelines.

…these tasks depend heavily on your specific operation, including the volume of food you are pushing out, the exact type of equipment you use, and your production system…

As the industry shifts toward digital food safety management, automated Bluetooth and Wi-Fi data-loggers have become the gold standard for monitoring walk-in coolers, freezers, and hot-holding cabinets. These sensors provide incredible peace of mind by constantly tracking ambient temperatures and sending alerts if a unit fails. But technology is not infallible. Automated loggers require regular comparisons to ensure their internal software offset is reading correctly.

To ensure these critical checks do not fall through the cracks, operators should implement a Master Calibration Schedule. Tracking these moving parts requires structured organization rather than memory.

In my experience, there are certain things you need to handle daily, others you can tackle each week, and some that only need attention once a month. Keep in mind, though, that these tasks depend heavily on your specific operation, including the volume of food you are pushing out, the exact type of equipment you use, and your production system. While I know your time is valuable, taking a few hours to critically review your operation will yield massive rewards for your kitchen down the road.

Once you have your system in place, document everything in a centralized master logbook or within your digital operating platform. Record the date, the instrument identifier, the initial reading, any corrective actions taken, and the initials of the verifying employee. When a health inspector sees an organized, comprehensive calibration history that extends far beyond standard handheld probes, it signals a top-tier culture of food safety excellence. Risk Nothing.

Be Aware When You Prepare – Food Prep Tips

The subject of food preparation covers some very broad, basic principles within food safety, with many steps associated with “risk” in some recipes. Certainly, preparation steps are where the most mistakes have occurred if a foodborne illness should occur. Outbreaks usually happen when more than one mistake occurs during prep, but sometimes it only takes one. Cooking is the biggest risk for raw foods, but all foods become ready-to-eat foods at some point in final preparation steps and that’s where the most care is required.

Food Gloves & Latex Allergy Education

Politicians joke about the endless stretch of rubber chicken dinners they may consume in an election year. For people with a latex allergy, such a prospect may be no laughing matter. While latex serves as an effective barrier glove material and has the best fit because of its elasticity, the risks associated should not be ignored. The solution is not simple and many options are available for operators today. It should always be mentioned that handwashing (before putting on gloves) is always the primary barrier to contamination and gloves are considered a good secondary barrier.

Foodborne Illness Myths & Facts

“It must have been something I ate.” That’s the typical statement when a person develops some relatively minor symptoms from food. Maybe not severe enough to go to the doctor so you choose to tough it out without medical care. Sudden onset of flu-like symptoms such as onset of stomach cramps, diarrhea, vomiting and fever could possibly mean you are the victim of a foodborne illness. The illness is sometimes referred to as “food poisoning”, but it’s often misdiagnosed.

Don’t Compromise: Clean and Sanitize

The subject is cleaning and sanitizing. Chefs, food service directors, managers and staff try to practice safe food-handling at every turn in the kitchen. Don’t let that effort go down the drain by slacking off on the many aspects of sanitation. That includes dish and ware-washing techniques (pots, pans, equipment), and cleaning all the areas that give us that “neat as a pin” appearance in your customers eyes. Customers seldom fail to bring that soiled silverware or glass with lipstick on it to the attention of the manager or wait staff. Improperly cleaning and sanitizing of food contact equipment does allow transmission of pathogenic microorganisms to food and ultimately our customer.