Pulse Tester Model 19311 Series

Pulse testing involves applying a sufficiently high test voltage (up to 6 kV) with a very short duration (<160 uS) to the object to be tested (lead-acid battery cell, metal film resistor).

When the switch is open to the lead-acid battery cell to apply pulse test, due to the 19311 series of internal resonant inductor, so the battery cell will be resonant with the 19311 series of internal resonant inductance and charging capacitor, this resonant waveform of the highest voltage peaks can be detected abnormal voltage withstand battery cell. When the switch is turned off, the lead-acid battery cell will only resonate with the resonant inductor inside the 19311 series, and the peak voltage of this resonant waveform will be attenuated, which represents the good or bad insulation quality of the battery cell. The resonance waveform is analyzed or compared with the resonance waveform of the sample to determine whether the lead-acid battery cells are good. Pulse testing of lead-acid battery cells that have not yet been filled with electrolyte is done mainly to find out whether the lead-acid battery cells have poor insulation or the isolation film does not exist before the electrolyte is filled.

Using AC/DC voltage to detect metal foreign matter at the cutout of a metal film resistor can make it difficult to detect abnormal insulation quality at the cutout of a metal film resistor because the test voltage at the cutout is too low/not high enough and the test voltage cannot be increased because the test power is too high, making it difficult to detect insulation quality abnormality at the cutout of a metal film resistor by using AC/DC voltage, so it is necessary to use the Pulse Test to detect insulation quality at the cutout of a metal film resistor. When a pulse test is applied to a metal film resistor with the switch open, the resonant inductor inside the 19311 Series generates a self-resonance, and the resonance waveform of the test can be analyzed or compared with the resonance waveform of a sample, and metal film resistors with abnormal voltage withstand can be detected. After the switch cutoff is turned off, the difference in the peak decay state of the resonant waveform voltage indicates the difference in resistance value of the resistor because the metal film resistor is connected in parallel with the resonant inductor. Pulse testing of metal film resistors is mainly done to detect whether there is any insulation problem at the laser cutout inside the encapsulated metal film resistor, so that poorer quality products will show their true colors. Detecting whether there are potential problems of poor insulation quality and insufficient insulation distance at the laser cut of metal film can ensure that metal film resistors will not deteriorate under normal operating conditions due to poor insulation quality or insufficient insulation distance at the laser cut, resulting in changes in resistance value, reducing the chance of causing safety accidents, and safeguarding the reliability of electrical products for long term use.