A microbalance is an extremely sensitive instrument – the slightest disturbance caused by environmental influences or user interaction can significantly affect measurement stability. All possible sources of vibrations should be avoided when using a microbalance. Microbalances are highly susceptible to air currents, dust, and fluctuations in temperature, and should only be used where ambient temperature and humidity are maintained at a stable level – away from vents, windows, and doors.
Ideally the balance should be set-up on a solid workbench - preferably a dedicated weighing table that can remain optimised for microbalance use, free from draughts or high traffic.
When a microbalance is first connected to the power supply or switched on, a minimum warm-up time of 6 hours is recommended for ambient temperature adjustment.
When using the microbalance, be sure to minimize convection flows inside the weighing chamber, which can negatively impact results. Only handle samples with tweezers, and allow acclimatisation to room temperature. When placing the sample onto the microbalance, the door should be opened to a minimum degree, for as short a time as possible.
Follow METTLER TOLEDO’s dedicated guide to weighing, 10 Steps to Successful Micro-Weighingand get further tips on how to deal with challenges when weighing with microbalances, including determining proper balance location and calibration.