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TM
The Smart Tweezers is an innovative answer to the challenge of
reducing size of SMT components.
Holding this lightweight device in one hand you can test and
troubleshoot circuits with all types of SMT components.
MEASURING INDUCTANCE, CAPACITANCE AND RESISTANCE
The primary display shows the reading of dominant parameter.
The secondary display (on top) shows the present reading of additional
parameters or measurement conditions when the primary display shows some
other feature (L,C). When multiple features present, the secondary display
shows one of the values.
The Bar Graph provides an analog representation of the measured parameter.
MEASURING VOLTAGE
In the AUTO MODE, Smart Tweezers TM unit measures DC voltage up to 8V.
In the unique TRACE MODE, it shows an oscilloscope like picture of AC voltage.
CONTINUITY /OPEN TEST
The beeper sounds for resistance readings below threshold, or to indicate a
momentary open circuit.
OVERVIEW
QUICK REFERENCE
The Smart Tweezers R-C-L meter (ST) is a portable impedance measuring
device, capable of measuring resistance, capacitance or inductance over
a range of more than eight (8) orders of magnitude. The Smart Tweezers
has a basic accuracy of 1% (resistance) and has three (3) test frequencies.
Display
ST has a Primary Display, a Secondary Display, a Bar Graph and a
Test Frequency Indicator.
The sign in the bottom left corner of the display indicates that device
is ON and ready to perform measurements. A, R, L or C indicate auto,
resistance, inductance and capacitance respectively.
ST is controlled by a microcontroller that operates the display and user
interface, sets measurement conditions and processes data. The device
has a unique mechanical design that allows measuring small SMT
components with size down to 0201.
SPECIFICATIONS
Technical Specifications
AC test mode test frequency:
Test frequency accuracy:
Test signal level:
1 kHz, 10 kHz, 100 Hz
0.25%
440+- 20 mV via 402Ω source
Maximum Measurement Ranges
Impedance/resistance:
Capacitance C:
Inductance L:
Quality factor Q:
Dissipation factor D:
Phase angle F:
0.000Ω to 9.9 MΩ
0.0 pF to 4999 uF
0.5 uH to 999 mH
0.0002 to 500
0.002 to 500
-90.0 to +90.0 deg
Maximum Resolution
Impedance/Resistance Z or RAC:
Capacitance C:
Inductance L:
Quality factor Q:
Dissipation factor D:
Phase angle F:
Circuit diagram:
10 mΩ
0.1 pF
0.1 uH
0.001
0.001
0.1 deg
7 different equivalent circuit diagrams
Auto mode read-out:
Equivalent circuit diagram:
Dominant parameter
Parallel for R+C, serial for R+L
Manual mode read-out:
Equivalent circuit diagram:
Dominant or secondary parameter
Parallel or serial
Measurement update rate:
up to 4 measurements (1 default)
Battery type:
Battery life:
1.5 V LR44 (357A) Alkaline or Air zinc
70 Hours typical with alkaline,
200 hours with air zinc batteries
Physical Specifications
Size:
Weight:
Environmental conditions
Operating temperature:
Storage temperature:
Relative humidity:
Altitude operating:
0°C to 50°C
-40°C to 70°C
0 % to 90 % (0 °C to 35 °C)
0 – 2000 meters
Relative humidity:
0 % to 90 % (0 °C to 35 °C)
Primary Display
The Primary Display is located in the middle of the screen and is the
larger of the two displays available. It shows the present major
parameter reading. For most functions the primary display shows 5 digits.
Secondary Display
The Secondary Display is located at the top of the screen and is the
smaller of the two displays. It shows the present reading of the minor
parameters.
Bar Graph
The Bar Graph provides an analog representation of the measured major
parameter and is located at the bottom of the display.
MEASUREMENTS
The default setting is to perform fully automatic auto range
measurement for resistance, inductance and capacitance. Most
measurement functions also have a manual mode, which can be
selected by using the Jog Dial button. Use the manual setting when you
need to measure a specific parameter or need better accuracy.
Measurement Setting Menu
To measure specific components or to change measurement
parameters, use Measure menu.
Measuring Resistance, Inductance or Capacitance
For automatic measurement use AUTO setting (default). To measure
only one parameter – resistance, inductance or capacitance set Smart
Tweezers as shown in Fig. 13.
14.0 x 2.5 x 3.0 cm (3.94 x 0.9 x 1.5 in)
53 grams (0.11 lb)
Note: When measuring small resistance, capacitance or inductance, make
sure that terminals are clean.
Rotate JogDial Left/Right to select menu items
Push JogDial to set selected parameters or exit
AUTOSET
Push JogDial to enter Menu
SOUND
DISPLAY
SYSTEM
MENU HIERARCHY
ON
Sound ON
OFF
Sound OFF (except MENU mode)
TONE
TONE mode (resistance < 1 Ohm)
<40
BEEP mode (resistance < 40 Ohm)
RIGHT
Right-Hand Display Indication mode
LEFT
CONTR
TIME-OUT
Left-Hand Display Indication mode
Display Contrast adjustment
Auto-Shutdown Time-Out (10 to 250 sec)
2.0 SEC
PERIOD
1.0 SEC
0.5 SEC
0.25 SEC
EXIT
AUTO
MODE
MEASURE
FREQ.
VOLTAGE
Resistance measurement mode
IND
Inductance measurement mode
CAP
Capacitance measurement mode
AUTO
Auto frequency mode
10 kHz
Fixed frequency mode setting
for specific measurements
(large or small capacitance or inductance)
1 kHz
AUTO
Measure DC Voltage (up to 8V)
TRACE
Oscilloscope like Picture (real time trace)
CALIBR
Offset adjustment for DC Voltage measurement
BATTERY
EXIT
Automatic measurement mode ( R,L or C)
RES
0.1 kHz
EXIT
Reading Intervals
Measure Battery Voltage