TOS5052 Overview The TOS5052 is a 5 kV AC/100 mA withstanding voltage tester which functions output voltage presetting, output frequency selection (50/60 Hz), and the rise time control function which can control the rise time up to the preset voltage. Features 1. For test complying with major industrial standards Each of the TOS5052 allows you to conduct withstanding voltage tests (dielectric strength tests) of electrical and electronic devices and components, complying with major industrial standards including UL, CSA, BS, and JIS (Japanese Industrial Standards) and Electrical Equipment Control Ordinances of Japan. 2. Rise-time control function The UL's type certification test and IEC standard require that the test voltage be raised gradually up to the preset level. The rise-time control function of the TOS5052 can automatically raise the test voltage to the prespecified level. 3. Improved test voltage waveform quality (a) Generates a test voltage waveform which is independent of the waveform of the AC line voltage. (b) Generates a 50 or 60 Hz low-distortion test voltage waveform. 4. Stabilized test voltage (a) Allows the test voltage to be preset. (b) Generates a test voltage that is independent of the AC line voltage. (c) Assures a voltage regulation of 9% or less (maximum rated load to no load) 5. High voltage output (a) Provided with a large-capacity high-voltage power supply which supplies the maximum rated voltage of 5 kV/100 mA (500 VA) (for 30-minute test time) or 2.5 times higher than that of our preceding models. (b) Generates a momentary short circuit current of 200 mA (for a test voltage is 1 kV and UPPER current of 100 mA) which is required in an IEC standard. (Cannot generate this current continuously because the output is automatically shut off by an over current protection mechanism.) 6. Rational layouts of keys and switches The keys have a slant-plane for easy viewing and convenient operation. The switch for test voltage range select and the control for test voltage adjustment are installed concentrically, allowing you to operate them conveniently with two concentric knobs. For adjustment of pass/fail-judgment limit current setting and that of timer setting, respective increment/decrement keys are provided. These keys and switches, together with the large display easy to view, are laid out rationally and will assist you to conduct your tests accurately and efficiently. 7. A large color display The TOS5052 has a large color VACUUM FLUORESCENT DISPLAY. It is a wide viewing angle type of display with high intensity, and clearly indicates information in clearly readable large letters and in color annunciators. The indicated information includes test conditions, instrument status, readback current, result of pass/fail judgement, etc., assisting you to conduct your tests accurately and efficiently. 8. Analog/digital voltmeters The TOS5052 is furnished with an analog voltmeter (±5% full-scale) and a digital voltmeter (±1.5% full-scale). The analog voltmeter serves as an output indicator and the digital voltmeter as a high-precision output voltmeter for accurate and prompt testing. (Neither analog nor digital voltmeters can be used to measure any external voltages that are present outside the TOS5052. An attempt to apply an external voltage to their output terminal would cause fatal damage to the TOS5052.) 9. A digital ammeter The TOS5052 has a digital ammeter to measure the current that flows through the DUT (device under test). 10. A window comparator for pass/fail judgement The TOS5052 has a window comparator for pass/fail judgment with reference to both upper (U) and lower (L) criteria (cutoff current). The comparator generates a FAIL signal when the measured current that flows through the DUT is greater than the preset upper limit criterion or even when it is less than the preset lower limit criterion. The L FAIL detection function contributes to improve the test reliability by detecting open-circuiting or imperfect contacting of the test leadwires. Separately for each of U type and L type of fail, the TOS5052 indicates a fail annunciator message on its display and delivers a fail event signal, allowing you to immediately find out the type of the fail. You can preset the upper limit and lower limit currents (cutoff currents) mutually independently of each other (0.1mA to 110mA, AC). 11. A digital timer The timer allows you to preset the period during which the test voltage is to be applied to the DUT. The preset range is 0.3 to 999 seconds. When the timer function is ON, the preset period is decremented and the timer indicates the remaining period; when it is OFF, time is incremented and the timer indicates the elapsed period. 12. Remote control provision The tester has provisions for remote start/stop control operation. That is, it has a 5-pin DIN connector (for the optional Remote Control Box or High Voltage Test Probe) on its front panel and a 14-pin Amphenol connector on its rear panel. The remote control function, together with the status signal function, will help you conduct efficient automatic labor-saving tests.