TABLE OF CONTENTS Notice Warranty Safety Precautions Getting Started Overview Controls Power On Menu Structures And Functions Measurement Features Measuring Resistance Measuring Capacitance Measuring Inductance Maintenance Labelling & Verifi cation Requirements Appendix A. Specifi cations Appendix B. Default Settings Appendix C. Accuracy Specifi cation...
NOTICE: TO THE BEST OF OUR KNOWLEDGE THIS DOCUMENT IS BELIEVED TO BE ACCURATE. THE MANUFACTURER RESERVES THE RIGHT TO CHANGE THE INFORMATION AND DOES NOT ASSUME ANY RESPONSIBILITY FOR OMISSIONS AND/OR ERRORS FOUND IN THIS DOCUMENT. WARRANTY: MANUFACTURER WARRANTS THIS PRODUCT TO BE FREE FROM DEFECTS IN MATERIALS AND WORKMANSHIP FOR A PERIOD OF ONE (1) YEAR FROM THE SHIPMENT DATE.
SAFETY PRECAUTIONS The following safety precautions should be observed prior to using this product and any associated accessories. Although devices and accessories would normally be used with non-hazardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by qualifi ed personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury.
GETTING STARTED This section summarizes basic operation of Smart Tweezers. In the section: OVERVIEW : Overview of the device Controls – Describes controls POWER-ON: Describes the power-on and power-off sequence, the warm-up time, and default conditions. DISPLAY: Discusses the display format and messages that may appear while using the device.
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HOW IT WORKS ST evaluates impedance of a component by measuring the voltage across the component and current through it. The complex ratio of voltage to current is equal to the complex impedance. The unit’s processor calculates various parameters that are displayed i.e. R, C or L. VOLTAGE SIGNAL TO ADC CURRENT SIGNAL...
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25V parts and 1.0V for < 16V parts). Note: Use the largest voltage possible for the best SNR and accuracy. The ST5 provides three measurement ranges (R1-R3). Each of the three ranges has the source impedance of approximately the mid-scale impedance. The table below specifi es the impedance ranges for each of the measurement ranges.
CONTROLS The Navigation Controller The controller is used to select a function or to change a setting of Smart Tweezers. The controller can be moved (rocked) in 4 directions (UP, DOWN, LEFT, RIGHT). Selection is performed by pressing along the vertical axis (PRESS). Quick Controls The Quick Controls allow changing test parameters or modes without entering the general menu by moving the Navigation...
POWER ON POWER-ON - To turn the Smart Tweezers ON, press the Navigation Controller. Note: Once powered on, the unit will perform the last selected function. POWER-OFF - ST powers off automatically if neither a measurement is performed nor the navigation controller is operated for approximately 30 seconds (default value).
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PRIMARY DISPLAY: The Primary Display is located in the middle of the screen and uses the largest font. It shows the dominant impedance parameter reading typically with 5 digits displayed. SECONDARY DISPLAY: The Secondary Display is located just above the Primary Display.
C+R MODE: Capacitance is shown on the Primary Display and the parallel resistance R, is shown on the Secondary Display. The units of capacitance are pF, nF, or μF. Resistance units are Ω or kΩ. Parallel (C < 500 pF) or serial (C > 500 pF) equivalent circuit diagram is used. C+D MODE: Capacitance is shown on the Primary Display and dissipation factor D on the Secondary Display.
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• Service menu — service functions • Measurement menu – measurement functions and settings • Mode menu – measurement modes • Setting menu – measurement parameters settings NAVIGATING MENUS Move the Navigation Controller UP or DOWN to move cursor to the desired menu item and PRESS it to select the item. The Current Setting cursor indicates the current setting.
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SYSTEM MENU System menu is used to access system settings and functions. System menu is used to access system settin SOUND MENU SOUND MENU SOUND MENU Sound menu is used to change the sound setting Sound menu is used to change the sound sett for measurement confi...
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The mode could be used for locating shorted part of a circuit e.g. on a PCB. DISPLAY MENU DISPLAY MENU Display menu is used to change display’s settings Display menu is used to change display’s set • Select RIGHT to set the “Right Handed” display mode •...
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BATTERY Select BATTERY to measure the actual battery voltage. PRESS to exit Select BATTERY to measure the actual batte SERIAL NUMBER Select S/N to display the device Serial Number and the fi rmware version. MEASUREMENT MENU Measurement modes and settings MODE MENU The Mode menu is used to set the measurement mode.
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AUTO MODE: Select AUTO mode (AM sign appears at the left bottom corner of display) for automatic measurement of inductance, capacitance or resistance. Note: In the AUTO mode ST uses 1kHz test frequency by default and has a limited sensitivity. Automatic detection may not work for small value capacitors and inductors.
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SETTING MENU Use this menu to set specifi c measurement parameter. Use this menu to set specific measurement p TEST FREQUENCY MENU Use this menu to set desired test frequency. RDQ MENU RDQ MENU Use this menu to set secondary display parameter. p y p The following combinations are allowed: The following combinations are allowed:...
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RANGE MENU Use this menu to set desirable source impedance d i bl range. Default value is auto-ranging (AUTO). Note: Auto-ranging procedure starts from R2 (1kOhm) LEVEL MENU Use this menu to set desirable test signal level. Default value is 1.0 Vrms. Note: 1.0 Vrms is equal to 2.8 Vp-p MODEL MENU Any non-ideal component can be represented as a resistive...
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TOLERANCE MENU This function is designed for component sorting. It checks whether the measured component is within preset tolerance from the reference component. The tolerance ranges available are 1%, 5%, 10%, and 20%. To preset a tolerance range: • Select manual L, C or R measurement mode (see MODE menu) •...
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One common application is to increase the accuracy of a small resistance measurement by storing (nulling) the test lead resistance (test leads shorted). Obtaining the leads offset (nulling) is also particularly important prior to making small capacitance measurements (test leads open). Smart Tweezers allows to store measurement offset for L, C, R component separately.
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During measurements an asterisk will appear beside the test mode indicator for which the offset has been stored indicating relative measurement. To reset (set to zero) the stored offset for a particular test mode t ( t t ) th t d ff t f •...
MEASUREMENT FEATURES This section describes specifi c ST functions and settings. Measuring resistance Covers resistance measurements. Measuring capacitance Covers capacitance measurements. Measuring inductance Covers inductance measurements. Testing diodes Describes testing general-purpose diodes. MEASURING SMALL RESISTANCE There is some small resistance offset due to the resistance of the tweezer tips, and resistance of the contacts between the tips and DUT.
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Optimal test frequency 10 kHz <10000pF 1 kHz 10001pF- 1μF There is some small capacitance offset due to capacitance of the tips. The offset depends on the distance between the tips (i.e. measured component size). The offset value should be used in calculation of the actual capacitance. Table below shows typical offset values for different component sizes: Offset, pF Component size...
ESR MEASUREMENTS Use the ESR measurement to measure the equivalent series resistance of a capacitor independent of its capacitance. Test frequency 0.1kHz/1 kHz/10kHz Test signal amplitude 0.25/0.5/1.0Vrms Sine wave Source impedance 62.5Ω/1kΩ/16kΩ Test period 1 Sec (default) Equivalent circuit diagram Serial MEASURING IMPEDANCE (|Z|) All circuit components, resistors, capacitors, and inductors...
LOW BATTERY INDICATION The empty battery icon on the display indicates that device’s battery The empty battery icon on the display indicates that d voltage is low and it should be recharged. The warning appears when the battery voltage drops below 3.55V, i.e. the batteries are about 90% depleted.
APPENDIX B. DEFAULT SETTINGS Default settings after AUTOSET command SOUND mode: DISPAY mode: No change Contrast: No change Readings PERIOD: 1 sec Measurement mode: AUTO Test frequency mode: AUTO Offset CALIBRATION: No change APPENDIX C. ACCURACY SPECIFICATION RESISTANCE, IMPEDANCE. Range Resolution 100 Hz 1 kHz...
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