A test apparatus is provided. The test apparatus includes: a signal provision section that provides a test signal to a device under test; an input section that inputs the output signal outputted from the device under test in response to the test signal as a signal-under-test; a periodic pulse generating section that generates a periodic pulse having a pulse width corresponding to one cycle of the signal-under-test; a converting section that outputs a voltage corresponding to the width of periodi...

The apparatus includes a first variable delay circuit that delays a data signal from a device under test (DUT) to output a delay data signal; a second variable delay circuit that delays a clock signal to output a first delay clock signal; a first FF that acquires the delay data signal based on a reference clock; a second FF that acquires the first delay clock signal based on the clock; a first delay adjusting section that adjusts a delay amount of at least one of the first and second variable de...

A combined true stress-strain data-generating testing technique, and method for determining unknown loads applied in compression to relatively thin, metallic and ring-shaped test specimens by means of flat die platen members. Both the die friction component .DELTA.D of the total applied load and the percent deformation .DELTA.T, or true strain of the ring specimen, as well as the unknown compression load, may be determined respectively from the change in shape or inside diameter and thickness of...

A method for measuring reservoir properties including skin factor and permeability thickness product of a porous earth formation with respect to injected fluid around a fluid injection well by rapidly increasing the rate of fluid injection to a new higher rate, maintaining injection substantially constant at this higher rate, and recording the variation with time of the fluid injection pressure as the injection rate is held substantially constant.

A test device for testing an electronic device having a plurality of device terminals that receive a signal, includes: an operating condition outputting unit for outputting an operating condition indicating an operation of a signal to be supplied to a device terminal to be associated with said device terminal; and a test module for supplying a test signal used in a test of the electronic device to the electronic device based on the operation indicated by the operating condition. The test module ...

A test apparatus for testing switching speed of a circuit, which includes a pre-stage logic element outputting a first or second level voltage and a post-stage logic element to which the output signal of the pre-stage logic element is input, is provided, wherein the post-stage logic element includes the post-stage FET, a gate terminal of which the output signal is input to, for outputting a different level of voltage according to the case that the output signal voltage is higher or lower than a ...

The disclosure relates to a test instrument of compact size, operable with a battery source and capable of measuring with high precision voltages in the millivolt and low voltage ranges, milliamps, provide precision outputs in the millivolt and low voltage ranges, precision milliamps outputs and provide a two wire transmitter simulation. Measurements are made utilizing light emitting diode (LED) devices and operational amplifiers operating at high levels to minimize errors.

A clip for connecting an electrical component to testing equipment, comprising a plurality of conductive elements mounted in a holder in positions to engage the respective leads of a multi-lead electrical package and to connect said leads to components of the testing equipment, the conductive element holder comprising flat plates joined by a deformable web to constitute an integral core unit, the upper and lower surfaces of said unit being normally non-parallel and the conductive elements being ...

A test system for the semi-automatic analysis of chemical constituents in a test fluid which comprises test devices having test reagents and code means associated therewith and an instrument which receives the test devices and is programmed by the device code means for automatically reading the particular test reagents associated with the particular test device being used. Preferably the test reagents are in a dry form, immobilized in or on a carrier member which upon contact with the test fluid...

A process for determining pregnancy wherein the concentration of estrogen steroids in the urine is evaluated by spectrophotometric measurement.