Teledyne LeCroy T3MIL50X Offers

Meet the requirements of low-resistance measurement applications with this reliable meter that provides four-wire measurements, temperature measurements, and temperature compensation functions. In addition, this meter has a 50,000-count measurement display and a sampling rate of 60 readings per second.

Features

• 3.5" (88.9 mm) large TFT LCD display
• Fast measurement rate of 60 readings per second with an accuracy of 0.05 %
• Drive mode: : DC+, standby
• Built-in temperature compensation measurement function
• Standard interfaces: USB, RS-232C, HANDLER/SCAN/EXT I/O
• Clear visibility of your measurement results
• Faster measurements without losing accuracy
• Suitable for various measuring applications
• Accurate temperature measurements
• Remote control your measurement
• Reliable product gives peace of mind
• 50,000 counts display
• High accuracy of 0.05 %
• 1 Amp test current, 0.1 μΩ resolution
• Four wire resistance measurement
• Temperature compensation measurement function
• Delayed measurement
• 20 sets of panel setting memory
• Interface: USB Device, RS-232C, handler/scan/EXT I/O

Various drive modes

This D.C. milli-ohm meter provides dry circuit and various drive modes (DC+, DC-,Pulsed, PWM) for measurement applications on different materials.

The pulsed current output mode is suitable for interacting conductors of different materials to reduce the influence of thermal EMF on the measurement. Thermal EMF is caused by electric potential difference generated from different conductors acting on different temperatures while conducting low resistance measurements.

The DC+ and DC- output modes are best for the measuring of inductive components.

The PWM output mode is suitable for measuring temperature sensitive materials to avoid any resistance variation caused by measurement current being applied for a long period of time.

Dry circuit testing is used to detect contaminates and oxides on mating contact surfaces. Typically, a dry circuit test is performed in conjunction with environmental stress tests intended to create contamination or metal oxides on connector contact surfaces. Excessive current through the contacts during testing can cause a physical change in the contact area on a microscopic level. Current can cause heating, which can soften or melt the contact points and surrounding area. The contact area enlarges, resulting in a reduction in resistance. To avoid "wiping away" the contaminates, a dry circuit method is used for testing. A dry circuit is one in which the voltage and current are limited to levels that can't cause changes in the physical and electrical condition of the contact junction. Generally, the open circuit voltage is 20 mV or less and the short circuit current is 100 mA or less. The dry circuit measurement can also be made in DC+, DC- and Pulsed modes.

Dry circuit test

Dry circuit testing is used to detect contaminates and oxides on mating contact surfaces. Typically, a dry circuit test is performed in conjunction with environmental stress tests intended to create contamination or metal oxides on connector contact surfaces. Based upon MIL-STD-1344 method 3002-1 low signal level contact resistance, tests must be applied under the maximum open circuit voltage of 20 mV (or lower), and short circuit current of 100 mA (or lower) to avoid over voltage for the both ends of components. The over voltage will damage the oxide coating and the thin layer of contact surface, as a result, losing the validity of the measurement. This D.C. milli-ohm meter provides three levels (500 m&Omege;: 100 mA/5Ω: 10 mA/50&Omegal: 1 mA) to limit open circuit voltage at 20 mV to execute dry circuit tests.

Faster measurement without sacrificing resolution

Fast (60 readings per second) and slow (10 readings per second) measurement speeds. The measurement speed does not effect the measurement accuracy. The number of digits displayed remains the same irrespective of the measurement speed. The user can measure in fast mode without losing accuracy

Standard interface for control and communications

This D.C. milli-ohm meter provides a D-sub 25-pin combined interface to control the device for various functionalities such as Handler, Scan and EXT I/O. Handler function can be used for connecting the device to a sorting machine in a production environment. Scan and EXT I/O is useful when connecting to an external switch or for an external trigger control. T3MIL series also offers remote control and data retrieval through various interfaces such as RS 232C and USB.

Applications

• Production testing of contact resistance of switches, relays, connectors, cables, and other low resistance devices
• Production testing of various inductive components (coil, choke, and transformer winding etc.)
• Testing of low value resistors, fuses, and heating elements
• Winding resistance of motors, transformers, solenoids, and ballasts
• Conductivity evaluation in product design
• Incoming inspection and quality assurance testing