Yes, ambient temperature can influence your precision scale or balance. Temperature changes cause expansion or contraction of the components of the weighing cell, affecting its performance and hence influencing your precision weighing results. If the ambient temperature fluctuates at the place where your precision balance is installed, you may experience poor repeatability. To ensure best performance, your precision scale or balance should be installed in a room where a constant temperature can be maintained. When a precision balance is first connected to the power supply or switched on, a warm-up time of approximately 1-2 hours is recommended. This period allows the precision balance to adjust to the ambient temperature and stabilize its environment. This warm-up should be repeated every time the balance is turned on after a period of inactivity. Ideally, you should leave your precision balance switched on. Most METTLER TOLEDO precision balances and precision scales are equipped with FACT fully automatic internal adjustment. FACT automatically triggers an adjustment procedure whenever a predefined difference in temperature is exceeded. In this way, the accuracy of the precision balance is maintained automatically, without the need for operator intervention. It should also be noted that articles, samples or containers to be placed on a precision scale should first be acclimatized to the ambient temperature. Items warmer or cooler than the precision scale itself can induce small air currents which influence the weighing cell due to the temperature differential. Not only can this cause drifting weight values, but items can appear heavier or lighter than they actually are.