No. That is shorthand for I check it when I buy it to make sure it works, and I check it when I change the batteries to ensure it still works with the new batteries.
Cabbage -- The high-end thermocouple thermometers allow you to enter a calibration setting. Most thermistor termometers don't allow you to enter a calibration setting because it really isn't needed. But you can check the accuracy of both (what I mean by calibrating it) by checking the temperature of ice-water and boiling water.
To understand why thermocouple thermometers usually have the ability to enter a calibration setting and thermistor thermometers don't, you need to understand the technical differences between they systems. Here is a good explanation I found on Google:
http://www.minco.com/~/media/WWW/Sensors/FAQs/Minco_SensorsDesignGuide 10.ashx?la=en
Thermocouple sensors take up less space than thermistor sensors, which enables them to be placed in thinner probes and also have faster response times. But the disadvantage of thermocouple sensors is they require more expensive electronics, they are less accurate than thermistors, and their accuracy will wander over time. This means a thermocouple thermometer will be more expensive (or a cheap thermocouple thermometer will be crap), and you need to be able to enter a calibration setting to bring it back to the correct temperature. Thermistor thermometers, on the other hand, are more accurate and the accuracy doesn't change over time. The downside of thermistor thermometers is they have a comparatively narrow accuracy range of about 100 C. But that is perfectly fine for a food thermometer where you are measuring temperatures between 0 C (32 F) and 100 C (212 F). A thermistor thermometer that is accurate at 0 C and 100 C may be a couple degrees off at 200 C (392 F). But that doesn't really matter for a food thermometer.
Professional chefs want the thermocouple thermometer because it reads temperatures faster. That is important in a busy kitchen where they are taking lots of temperature readings. But for home use, that speed isn't really important for most people. A thermistor food thermometer is going to be a bit slower, but also cheaper, more stable, and more accurate. That is just a function of the technology.