{"id":39797,"date":"2022-09-06T13:45:38","date_gmt":"2022-09-06T06:45:38","guid":{"rendered":"https:\/\/techmaster.com.vn\/?p=39797"},"modified":"2022-09-16T11:04:49","modified_gmt":"2022-09-16T04:04:49","slug":"lcr-meter-calibration","status":"publish","type":"post","link":"https:\/\/techmaster.com.vn\/en\/lcr-meter-calibration\/","title":{"rendered":"LCR Meter Calibration"},"content":{"rendered":"

\"LCR<\/a><\/span><\/h2>\n

1.What is LCR Meter\u00a0?<\/strong><\/span><\/h2>\n
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LCR Meter is a specialized device for testing the\u00a0inductance (L), capacitance (C) and resistance (R) of\u00a0electronic components. This equipment is applied at laboratories, factories, warranty offices to research, develop, testand repair electronic components. The\u00a0LCR Meter series possesses the ability\u00a0to measure a variety of parameters: the inductor quality coefficient (Q) and the coefficient (D) is similar to\u00a0Q but for resistance.\u00a0With the improvement in technology, LCR Meter is\u00a0integrated with other measuring devices such as oscilloscopes, pulse generators, …\u00a0Provides many parameters for users to accurately\u00a0assess the device status. The testing efficiency, maintenance and repair work will achieve higher efficiency.<\/span><\/p>\n

\"LCR<\/a><\/span><\/p>\n<\/div>\n

2. Scope of procedure<\/strong><\/span><\/p>\n

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\n\n\n\n\n
Unit Under Test Characteristics<\/span><\/td>\nPerformance Range<\/span><\/td>\nPerformance method<\/span><\/td>\n<\/tr>\n
LCR Meter<\/span><\/p>\n

Handhelds LCR Meter<\/span><\/td>\n

Up to 100 M\u03a9<\/span><\/p>\n

Up to 100 \u03bcF<\/span><\/p>\n

Up to 10 H<\/span><\/p>\n

(20 Hz ~ 1 MHz)<\/span><\/td>\n

Comparison to by LCR Standard<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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3. Standard and supporting device<\/strong><\/span><\/h2>\n
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\u2714 Digital Multimeter<\/span><\/p>\n

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\u2714 LCR Calibrator<\/span><\/p>\n

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\u2714 Standard Inductor<\/span><\/p>\n

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\u2714 Standard Capacitor<\/span><\/p>\n

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\u2714 Decade Resistor<\/span><\/p>\n

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\u2714 Connecting Leads\/Wires<\/span><\/p>\n

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\u2714 LCR meter test leads \/ 4 BNC Connector<\/span><\/p>\n

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4. Environment conditions\u00a0<\/strong><\/span><\/h2>\n
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Temperature: (18 \u00f7 28)\u00b0C<\/span><\/p>\n

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Relative Humidity: (40 \u00f7 60)%RH<\/span><\/p>\n

5. Preparation\u00a0<\/strong><\/span><\/h2>\n
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– Technician must be familiar with calibration techniques and the operator manual of the UUT being calibrated.<\/span>
\n– Ensure UUT Fulse are of the proper value, if applicable , before beginning calibration.<\/span>
\n– Connect UUT and test equipment to appropriate power source. Set all STANDBY \/ POWER ON and allow warm-up as required by the manufacturer.<\/span>
\n– Ensure line regulation on these power supplies, vary the input voltage to the UUT by \u00b110%.<\/span>
\n– Short UUT test leads together to zero. The UUT must indicate 10 counters or less.<\/span><\/div>\n
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6. Perform\u00a0<\/strong><\/span><\/h2>\n

6.1 Frequency Accuracy Test<\/strong><\/span><\/h3>\n
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– Connect UUT as show as above.<\/span>
\n– Calibration points will be perform at 100 Hz, 120 Hz, 1kHz, 10kHz, 100kHz with 1V. Other test point follow customer\u2019s requirements.<\/span>
\n– Set Digital Multimeter function switch to measure frequency.<\/span>
\n– Adjust UUT Frequency for the desired output value.<\/span>
\n– Record the Digital Multimeter indicator.<\/span>
\n– Repeat at least 5 times<\/span>
\n– Repeat for remain test points.<\/span>
\n– Disconnect test leads.<\/span><\/p>\n

6.2 Level Accuracy Test<\/strong><\/span><\/h3>\n
\n
– Connect UUT as figure 1.<\/span>
\n– Calibration points will be perform follow table below.<\/span>
\n– Set Digital Multimeter function switch to measure VAC, VDC.<\/span>
\n– Record the Digital Multimeter indicator.<\/span>
\n– Repeat at least 5 times.<\/span><\/div>\n
– Repeat for remain test points.<\/span><\/div>\n
– Disconnect test leads.<\/span><\/div>\n
<\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Frequency<\/strong><\/span><\/td>\nUUT Setting<\/strong><\/span><\/td>\n<\/tr>\n
1kHz<\/strong><\/span><\/td>\n1 Vrms<\/span><\/td>\n<\/tr>\n
2 Vrms<\/span><\/td>\n<\/tr>\n
3 Vrms<\/span><\/td>\n<\/tr>\n
4 Vrms<\/span><\/td>\n<\/tr>\n
5 Vrms<\/span><\/td>\n<\/tr>\n
DC<\/strong><\/span><\/td>\n0.5 V<\/span><\/td>\n<\/tr>\n
1 V<\/span><\/td>\n<\/tr>\n
1.5 V<\/span><\/td>\n<\/tr>\n
2 V<\/span><\/td>\n<\/tr>\n
3 V<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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\u00a06.3\u00a0Capacitance Calibration<\/strong><\/span><\/h3>\n

– Connect UUT.<\/span>
\n– Set UUT function measure Capacitance.<\/span>
\n– Set UUT with signal level: 1Vrms , Trigger : Int, Speed : slow , Cable Length 1m.<\/span><\/p>\n<\/div>\n

– Set UUT range dependent on the appropriate capacitors in table below. Other test point follow customer\u2019s requirements.<\/span><\/div>\n
<\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Frequency<\/strong><\/span><\/td>\nCapacitor Value<\/strong><\/span><\/td>\n<\/tr>\n
20 Hz ~ 1 MHz<\/strong><\/span><\/td>\n10 pF<\/span><\/td>\n<\/tr>\n
100 pF<\/span><\/td>\n<\/tr>\n
1 nF<\/span><\/td>\n<\/tr>\n
10 nF<\/span><\/td>\n<\/tr>\n
100 nF<\/span><\/td>\n<\/tr>\n
1 \u03bcF<\/span><\/td>\n<\/tr>\n
10 \u03bcF<\/span><\/td>\n<\/tr>\n
100 \u03bcF<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
<\/div>\n
– Record the UUT value.<\/span><\/div>\n
– Repeat at least 5 times.<\/span><\/div>\n
– Repeat the above steps with other frequency points. <\/span><\/div>\n
– Disconnect the capacitor from UUT test leads.<\/span><\/div>\n
<\/div>\n