This instrument can adapt to the high-speed test on site of production, but also to meet the laboratory test requirements of high precision and high stability. Meanwhile, it provides HANDLER and RS232C interface for equipment being used in automatic sorting systems and computer networking.
LDG2818A type LCR meter are impedance measuring instruments with high precision , high stability and wide measuring range . Test frequencies are from 20Hz to 300kHz, and you can select between 0.01V ~ 2.00V to 0.01V stepping test signal level, measuring inductance L, capacitance C, resistance R and many other parameters. It uses one pc of 240X128 dot matrix LCD screen with backlight to show a variety of measurements and various control status. This instrument is powerful and has superior performance and friendly user interface integration. It can adapt to the high-speed test on site of production, but also to meet the laboratory test requirements of high precision and high stability. Meanwhile, it provides HANDLER interface, and the RS232C interface for equipment being used in automatic sorting systems and computer networking. VT2818A are high-performance, high standard testing instruments for testing components.
This instrument provides a wide range of variable test conditions, which typically have:
Measuring frequency:from 20Hz ~ 300kHz to 0.01Hz stepping;
Test signal level: from 0.01V ~ 2.00V to 0.01V stepping;
Measuring speed: can choose fast-speed, medium-speed, slow-speed;
Optional constant source internal impedance: 30Ω or 100Ω;
"0" clearing: it can do point or sweep zero-clearing to the test ports when at open-circuit and short-circuit in order to eliminate the strays in the test ports and the lead resistance, thus to further improve measurement accuracy;
The instrument provides three data reading methods and various selector sorting methods：
l Direct reading：directly display the parameters of the test part;
l Absolute deviation：difference between the reading value and the nominal value;
l Relative deviation：percentage difference between the reading value and the nominal value.
l Component sorting：VT2818A instruments provide the sorting methods of various selectors:
Qualified selector (BIN1～BIN9): mean that the major and minor parameters are all qualified;
Auxiliary selector (AUX): mean that the major parameters are qualified but the minor parameters are un-qualified, and the AUX switch is on(ON);
Unqualified selector(OUT): the major parameters are unqualified, or the major parameters are qualified but the minor parameters are not qualified, and the AUX switch is off (OFF)。
The instrument provides three types of communication interfaces:
l Serial interface：RS-232 interface provides much convenience for the serial communication with outside equipments. The instrument can send data to the outside equipments, and the outside equipments can set the functions and parameters of the instrument through this interface, which can basically replace the keyboard function;
l HANDLER interface：this interface can synchronize the instrument with the component mechanical handling equipments and can test and sort the components, and then transmit the sorted result to the mechanical handling equipments.
l IEEE-488 interface (GPIB) (optional): this general interface provides convenience for composing automatic testing system with instrument, computer and other testing device.
l Both RS-232C and IEEE-488 (optional) interface commands are compiled in the format of Standard Commands for Programmable Instrumentation (SCPI) that is internationally general, which makes user programming quite easy.
1.Environmental temperature and humidity
temperature：10ºC～30ºC, humidity £ 80%RH，with which can meet the requirements of test precision;
temperature：0ºC～40ºC, humidity £ 90%RH, with which can do operation and test.
Preheating time after startup: ≥ 20 min.
4. Issues to be attended:
Do not use in tough environment such as dust, vibration, direct sunlight, corrosive gas etc
In case that the instrument is not to be used for long time, please place it in the original packing case or similar packing case in a well ventilated indoor environment of temperature of 5℃~40℃ and RH ≤85%. The air in the storage environment should be free corrosive substances to the instrument. Besides, direct sunlight shall be avoided.
This instrument has been carefully designed in order to reduce noise wave interference resulted from AC power input; however, use under low noise interference environment is recommended; power supply filter shall be installed in case use in high noise interference environment is unavoidable.
At the back panel of the instrument installed is a cooling fan, with cooling vents on the left and right, thus to prevent internal temperature rise from affecting instrument precision. The instrument shall be ensured with good ventilation.
Do not turn on and off the instrument frequently to avoid damaging the data stored.
5.Volume and weight
Weight: about 5.5kg。
Basic technical index
1. Test function
L: Inductance C: Capacitance R: Resistance
Z: Impedance X: Reactance
B: Susceptance G: Conductance
D: Dissipation Q: Quality factor q: Phase angle