Laboratory task

5.1 Research the counter. Establish a correspondence between governments, shown on the front panel of the device and the structural scheme (pic 1).

5.2 To make the external research of EFC in self-control mode.

5.3 To make research in all work modes.

5.4 In frequency measurement mode perform validation of feature selection on the frequencies given in table 1 (appendix A). The results show in table 5.1.

 

Table 5.1 – Basic characteristics evaluation in “FREQUENCY MEASURMENT” mode.

ƒs, kHz	Тcount, ms	Result, kHz	∆ N, Hz	N	δ N

 

5.5 In period measurement mode perform the same measuring. The results show in table 5.2.

 

Table 5.2 – Basic characteristics evaluation in “PERIOD MEASURMENT” mode.

ƒs, kHz	n	Т м	Result (ms, µs)	∆ N	N	δ N	Тcount, ms

 

5.6 In frequencies ratio mode perform the same measuring. The results show in table 5.3.

 

 

Table 5.3 – Basic characteristics evaluation in “FREQUENCIES RATIO” mode.

ƒ1/ƒ2	n	Result	∆ N	N	δ N	Тcount, ms

 

6. Protocol of the laboratory work (№.... name...)

6.1 The purpose of the experiment.

6.2 List of equipment used in the Table. 6.1.

 

Table 6.1 - List of equipment used

Name of the device	type	serial number	Metrological characteristics
Accuracy	Range	Frequency

 

6.3 Measuring chart.

6.4 To build in one system of coordinates of graphic arts of dependence of relative error of δ _N from frequency in the mode of measuring of frequency and period. To draw a conclusion about the choice of the mode of operations of EFC.