Use these functions of a multimeter to easily eliminate test errors
Test data is a very important basis for judgment in experimental R&D and production. Tektronix multimeters are also equipped with corresponding functions to eliminate errors and improve test accuracy.
1. Integral frequency noise removal function NPLC
When the test signal is small, the influence of power frequency noise cannot be ignored. We can eliminate this error through the NPLC option. The larger the NPLC value is, the longer the test time will be and the higher the accuracy will be.
2. Automatic zero calibration function Auto-Zero
Testers using a handheld multimeter can short-circuit the red and black test leads to zero before measuring to improve measurement accuracy. Tektronix multimeters simplify this operation for engineers by setting the "Auto-Zero" option directly in the instrument. Once turned on, the instrument will automatically reset to zero before each measurement to improve measurement accuracy.
3. Filter function Filter
The filtering function is one of the methods commonly used to eliminate errors during measurement. The filtering function of Tektronix multimeter is divided into moving filtering mode and repetitive filtering mode. The calculation methods of the two modes are different. Assume that the average number is set to 10 (the average number selection range of Keithley instruments is usually 1-100):
Moving filter mode: first calculate the average of 1-10 data, then the average of 2-11 data, then the average of 3-12 data...
Repeat filtering mode: first calculate the average of 1-10 data, then the average of 11-20 data, then the average of 21-30 data...
According to the two calculation methods, it can be known that using the repeated filtering mode, starting from the second reading, the multimeter will measure more data, so it can better ensure the accuracy of the measurement.
