Check battery voltage before the charge and after overnight charge. Your right about the 8 volt charger. You can use an automotive charger but will have to watch that it does not overcharge the battery. The 12 volts on 8 volt will charge it, but the best would be a 24 volt charger, where you could charge 3 at a time.
A high accuracy electronic cold junction compensation circuit maintains typical system accuracy of Â±0.2Â°C over an ambient temperature range of 15 to 35Â°C. Individual offsets may be added to each input in software to facilitate individual calibration of each channel. For information on our wide selection of Type T Thermocouple temperature probes.
If you do not know your elevation, it is best to check the accuracy of your thermometers using the ice-point method.) 1. Boil clean tap water in a deep pot. 2. Put the thermometer stem or probe into the boiling water so the sensing area is completely submerged. 3. Wait 30 seconds or until the indicator stops moving. 4. If the temperature is at 212 o F (100 o C) then remove the thermometer. It is ready for use.