Condensation on balance suspension:

Condensation of the sample will also affect the mass of the sample and as a result the shape of TG curve .This could be prevented through managing a dynamic atmosphere around the sample within the furnace so in which the entire condensable product might be driven through the flowing gases.

iii)       An Random fluctuation of balance mechanism

iv)       Reaction among sample and container

v)         Convection effect from furnace

vi)       Turbulence effect from gas flow

vii)      Induction effect from furnace

Errors of category (iii) could be prevented through proper placing of balance within the laboratory and error (v) could be prevented through sensible choice of sample container. Last three errors (v- vii) have to be considered in the design of the furnace, the balance and its suspension system. Through avoiding excessive heating rate and proper gas flow rate some of above mentioned errors might be avoided.

In the light of above elaborates it is essential to calibrate thermobalance before to use.

Calibration of thermobalance for the measurement of mass. It could be completed through adding known mass of the sample container and noting the reading of the chart. Temperature calibration: ferromagnetic standards are used for these reasons. In a magnetic field there substances showed detectable mass changes. The ferromagnetic standards are quite appropriate for the temperature range from 242 to 771° C.