Smart Tweezers LCR-meter or LCR-Reader?
With just a touch of the Smart Tweezers' tips, the component value is displayed in a fraction of a second. No adjustments to the test signal frequency or amplitude, range or even the component type is needed, Smart Tweezers does it all. Not only does Smart Tweezers display the main impedance component L, C or R, but the parasitics such as R for L and C.
Right from the start, Smart Tweezers were built as an LCR-meter especially made for Surface Mount Technology. The innovative mechatronic design combined a high-precision fully-automatic digital LCR-meter with a pair of gold-plated tweezers and an LCD screen into a lightweight, pocket sized device. The outcome is a user-friendly experience, and very low and well-known parasitics.
Now you have a choice of buying Smart Tweezers or LCR-Reader, a new budget model of a tweezer type LCR-meter. A summary of Smart Tweezers and LCR-Reader feature comparison is avalaible in this Table. In a nut shell, the main difference is price, size and accuracy. Smart Tweezers is a high-end product for professionals with a basic accuracy of 0.2%, supplied with a NIST Traceable Calibration Certificate. LCR-Reader outperforms previous models of Smart Tweezers ST-1, ST-2 and ST-3. With a basic accuracy of 1%, weight of 1 Oz and price under $200 it is a consumer's choice LCR-Meter. It does not have a calibration certificate and only uses 0.5 Vrms test signal thus limiting its application for ceramic capacitors. It is well known that test signal lower then 1 Vrms results in a underestimated capacitance values for ceramic capacitors, as it was documented in ST-2 User's Manual on p. 16.
The high-precision gold plated tweezer tips used in our LCR-meters are able to hold components as small as 0201 size and still guarantee a full contact for highly accurate results. The low value parasitics are about 1 pF capacitance and 30 mOhms resistance of the tweezer tips. Depending on the size of component being measured, the parasitic capacitance can vary from 0.5 to 1.2 pF. The value of parasitic capacitance can be subtracted from the measurement by setting the device to the 'Automatic Offset Subtraction' feature.
The automatic offset subtraction feature alone sets Smart Tweezers apart from other characterization tool for small resistances and capacitances. Without having to calibrate the device, besides setting the device to offset subtraction, Smart Tweezers can measure capacitance of the order of 1 pF and resistance of 10 mOhms.
The newest model of Smart Tweezers, ST-5, has a higher accuracy than the previous models due to a new four-wire connection to the gold plated tips. This kind of connection there reduces the noise and lessens the parasitic capacitance of the probes by more than a factor of two.
New features include component sorting, automatic offset subtraction, as well as the ability to manually adjust test signal levels between 0.2, 0.5 and 1 Volt. Older models of Smart Tweezers used to read about 30% lower than the actual capacitance value of ceramic capacitors due to their non-linearity at low test signal, therefore being able to test these components at 1 Volt test signal is crucial. On the other hand, the voltage measurement feature available in the previous models of Smart Tweezers has been removed.
The new model includes a rechargeable Li-Ion battery allowing significantly increase battery life as well as the USB charger with a universal 110/250 Volts wall adapter and a USB cable.
- Fully automatic measurement of Inductance, Capacitance and Resistance
- Basic Accuracy of 0.2%
- Automatic selection of the best range
- Component sorting with 1, 5, 10 an 20% tolerance
- Lithium-Ion battery and USB Charger
- Continuity and Diode test
- Semi-automatic offset subtraction
- Weight of 52 gramms (less than 2 oz)
Smart Tweezers Measurement of Inductance, Capacitance, Resistance
Once Smart Tweezers probes make a contact with a component, you see the reading of the main impedance component (L,C, or R) on the Primary display. The secondary display (at the top of the LCD screen) shows value of the secondary impedance component, such as a parasitic resistance of the capacitor (equivalent series resistance ESR).
Smart Tweezers' Controls
Smart Tweezers Navigation Controller button allows to select a function or to change settings. Push the Navigation Controller button left/right/up/down to change a setting or press it to activate the Menu.
Smart Tweezers Specifications
|Operating Temperature:||0 °C to +50 °C|
|Storage Temperature:||-40 °C to +70 °C|
|Relative Humidity:||0 % to 90 % (0 °C to 35 °C) |
0 % to 70 % (35 °C to 55 °C)
|Altitude Operating:||0-2000 meters|
|Battery Type:||3.7 V LiPO rechargeable 150 mAh|
|Typical Charge Time:||2.5 Hours|
|Electromagnetic Compatibility (EMC):||Susceptibility and Emission: CE 89/336, FCC 15 part B|
|Size:||14.0 x 2.5 x 3.0 cm (3.94 x 0.9 x 1.5 in)|
|Weight:||53 grams (0.11lb)|
|Measured Parameters:||L, C, R, ESR, D, Q|
|Measuring Frequencies:||100 Hz, 120 Hz, 1 kHz, 10 kHz|
|Measurement rate:||1 time per second|
|Resistance:||0.05 Ohms to 9.9 MOhms|
|Capacitance:||0.5 pF to 4,999 µF|
|Inductance:||0.5 µH to 999 mH|
|Dissipation Factor:||0.001 to 1000|
Accuracy is specified at 18°C to 28°C (64°F to 82°F), with relative humidity to 90%.
|Accuracy:||0.2% in range 100 R to 10 K, 0.5% in range 1 R to 1 M|
|Accuracy:||0.2% in range 10 nF to 10 µF, 0.5% in range 100 pF to 1 mF|
|Accuracy:||0.2% in range 10 mH to 100 mH, 0.5% in range 100 µH to 1H|
Smart Tweezers Purchasing Information
|Order by Phone/Fax: 301-762-1021|
|E-mail your Purchase Order to email@example.com|
Designed and Manufactured In Canada. Patented in Canada, USA, Europe, Japan, China, Taiwan, Hong Kong, and India.