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The presented meter is a demonstration model - a simplified, initial version of the target device. He is currently undergoing tests.

The serial production device will have much greater possibilities. This will enable, among others, multi-point calibration, measurement of SMD components in various cases, automatic range change, etc.  A range of larger capacitances will also be added, signaling of warmed up (full readiness) and signaling of potential errors.

 

We will also change the enclosure - it will be made of metal, which will improve shielding - important in such a sensitive device. The current enclosure is 22x21x8cm. The target one will have similar dimensions, but it will be a product with a modern, aesthetic line.
We want to improve the levels of accuracy: when measuring capacitance, we will probably decrease the zero error twice. We are also working on improving the error of inductance measurement - the meter can potentially measure small coils with very good accuracy.

 

   Note
For commercial and technical reasons, we have now suspended work on the LC-Low meter.
First, we will produce his "smaller brother": the nano-H - meter for very small inductances. The nano-H measuring features will be very similar to those obtained in LC-Low. The basic difference between the meters is that nano-H measures only inductances.

 

The meter has been equipped with a special function that helps in building resonance circuits. The meter measures independently the capacitance and inductance at the same time and than calculates the resonant frequency of these two elements.

Summary

Simultaneous measurement of L and C. Frequency of resonance of the coil and capacitor

Above measurement of capacitive diode. The potentiometer enables setting the reverse bias voltage in the range from 0 to 9V, which of course changes the barrier capacity of the diode.

The pictures show the measured capacitors and the results of their measurements. For now, the error of capacity measurement is in the order of 1.5% and +/- 30fF, we are working on reducing this error.

Capacitance measurements

There are no elements in the Cx connector of the meter, so 0pF is displayed.

However, there may be a zeroing error at the level of 0.02pF (only in the model, we are working on reducing this error).

Calibration of capacity measurement

In the photo the first coil with a nominal value of 2.7nH. As you can see, the result differs by only 0.1nH.

The meter has very high sensitivity. That's why it's worth paying attention to details that would normally be left out. Here, even 1 mm of cable is important! This 1mm is for a typical wire about 1nH. Therefore, the measurement result is influenced, for example, by the depth of insertion of the leads into the connector. The "jumper" in the picture No. 1 protrudes very little and the inductance measured is 1.76nH. In the next picture (No. 2) the jumper protrudes more, which increases the measured inductance by as much as 1.3nH.

In the picture No. 3 we measure the jumper size 1206. As you can see, the value is negative. This effect will occur if the calibration was carried out for a different element size (calibration for 603, measurement for 1206). In other words, the difference between the inductances of the enclosures can reach 2nH.

Nr 2

Nr 1

Nr 3

Inductance measurements

4

3

2

1

Measuring range 1

1nH .. 20µH

Frequency of measurement: 1 .. 6MHz.

Absolute error: no more than 0.4 nH (after heating and calibrating by the user)

Absolute error without user calibration: no more than 3nH.

Relative error of measurement for the 100 nH standard: not more than 0.5%

 

Measuring range 2

1µH..300µH

Frequency of measurement: 60kHz .. 300kHz

Absolute error: no more than 15nH

Relative error of measurement for the 10μH standard: not more than 0.5%

Relative error of measurement for 220μH standard: not more than 0.5%

Relative error of measurement over the entire 1μH..200μH range: no more than 1.5%

 

Heating: no more than 30min

 

 

Below we present selected options of the meter.

LC-Low - Inductance and capacitance meter 

 

Resonant inductance meter and capacitance "LC-Low" is a measuring instrument designed especially for measuring very small inductances and capacitance. The general idea of measurement is based on the change of the resonant frequency by the element being tested (coil or capacitor).

The main purpose of the device development was the ability to  measure  very  small  inductances,  including less than 5 nH. The instrument can measure inductances and capacities with an absolute error not exceeding 0.5nH and 20fF respectively. The meter provides full accuracy after calibrating by the user.

The device was created for the purpose of electronics (including hams) designing devices and RF systems in which LC resonant circuits play an important role. LC-Low allows you to efficiently select the right pair of coil and capacitor for the expected resonance, giving the converted resonance frequency of both elements.

Przycisk

Calibration of inductance measurement with a special component

Calibration of inductance measurement with a special component

Simultaneous measurement of L and C. Frequency of resonance of the coil and capacitor

Analogue electronics. Think different.

Analogue electronics.

Think different.

Analogue electronics.

Think different.

To top

LC-Low - Inductance and capacitance meter 

 

Resonant inductance meter and capacitance "LC-Low" is a measuring instrument designed especially for measuring very small inductances and capacitance. The general idea of measurement is based on the change of the resonant frequency by the element being tested (coil or capacitor).

 

The main purpose of the device development was the ability to  measure  very  small  inductances,  including less than 5 nH. The instrument can measure inductances and capacities with an absolute error not exceeding 0.5nH and 20fF respectively. The meter provides full accuracy after calibrating by the user.

The device was created for the purpose of electronics (including hams) designing devices and RF systems in which LC resonant circuits play an important role. LC-Low allows you to efficiently select the right pair of coil and capacitor for the expected resonance, giving the converted resonance frequency of both elements.

The meter has very high sensitivity. That's why it's worth paying attention to details that would normally be left out. Here, even 1 mm of cable is important! This 1mm is for a typical wire about 1nH. Therefore, the measurement result is influenced, for example, by the depth of insertion of the leads into the connector. The "jumper" in the picture No. 1 protrudes very little and the inductance measured is 1.76nH. In the next picture (No. 2) the jumper protrudes more, which increases the measured inductance by as much as 1.3nH.

In the picture No. 3 we measure the jumper size 1206. As you can see, the value is negative. This effect will occur if the calibration was carried out for a different element size (calibration for 603, measurement for 1206). In other words, the difference between the inductances of the enclosures can reach 2nH.

The presented meter is a demonstration model - a simplified, initial version of the target device. He is currently undergoing tests.

The serial production device will have much greater possibilities. This will enable, among others, multi-point calibration, measurement of SMD components in various cases, automatic range change, etc.  A range of larger capacitances will also be added, signaling of warmed up (full readiness) and signaling of potential errors.

 

We will also change the enclosure - it will be made of metal, which will improve shielding - important in such a sensitive device. The current enclosure is 22x21x8cm. The target one will have similar dimensions, but it will be a product with a modern, aesthetic line.
We want to improve the levels of accuracy: when measuring capacitance, we will probably decrease the zero error twice. We are also working on improving the error of inductance measurement - the meter can potentially measure small coils with very good accuracy.

 

  Note
For commercial and technical reasons, we have now suspended work on the LC-Low meter.
First, we will produce his "smaller brother": the nano-H - meter for very small inductances. The nano-H measuring features will be very similar to those obtained in LC-Low. The basic difference between the meters is that nano-H measures only inductances.

 

 

 

You can measure

even 1 nH !!!

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  Copyright AB-LAB 2018

   All rights reserved