Proper usage ensures measurement accuracy and extends the instrument's service life.
1. Proper Installation and Contact: For contact-type instruments, ensure good contact between the temperature probe and the medium being measured. When measuring the surface temperature of a solid, ensure sufficient contact area and pressure; when measuring liquids or gases, insert the probe to a representative depth. For infrared thermometers, pay attention to the distance-to-spot ratio and keep the optical path clean.
2. Compensation for Environmental Factors: Understand and minimize the interference of environmental factors on measurements. Examples include reference junction temperature compensation for thermocouples; accounting for lead wire resistance when using resistance temperature detectors (RTDs); and, for infrared thermometry, addressing the effects of ambient temperature, steam, and dust on radiation, as well as correctly setting the object's emissivity.
3. Periodic Calibration and Maintenance: All measuring instruments experience drift over time. Periodically sending the instrument to a qualified facility or calibrating it against a standard reference is essential to ensure long-term measurement accuracy. Routine maintenance includes keeping the probe clean and inspecting connection cables for damage.
