Why do we allow electronic instruments to warm-up before use?

Q. Why do we allow electronic instruments to warm-up before use?

Answer: Electrical properties such as resistance, capacitance etc. changes with temperature. In order to get the accurate results from the electronic instrument, we warm the instrument to stabilize thermally before we use them.

We allow electronic instruments to warm-up before use produces accurate results (such as the absorbance results produced by the Spectrophotometer in Spectrophotometry lab). Warming up also stabilizes the electric equipments to produce consistent results.

Q. In a spectrophotometry lab, why do we allow electronic instruments to warm-up before use?

Answer: To stabilize the electronic instruments at a given temperature. Almost all materials change characteristics while heating and electricity heats materials, admittedly a lot less than when tubes were used. If the unit is properly ventilated and the air temperature does not change much the variance in readings will be much less.

Do you know?

A spectrophotometer is an instrument that measures the amount of light absorbed by a sample. Spectrophotometer techniques are used to measure the concentration of solutes in solution by measuring the amount of the light that is absorbed by the solution in a cuvette placed in the spectrophotometer.

The spectrophotometer technique is to measures light intensity as a function of wavelength. It does this by diffracting the light beam into a spectrum of wavelengths, detecting the intensities with a charge-coupled device, and displaying the results as a graph on the detector and then the display device.