AC output section (ACW only)

*1 When tests are performed consecutively, output time limit and rest time may become necessary depending on the upper limit setting.
*2Waveform distortions may occur if an EUT whose capacitance is dependent on voltage (for example, an EUT that consists of ceramic capacitors) is connected as the load. However, if the test voltage is 1.5kV, the effect of a capacitance of 1000pF or less can be ignored. Because the high-voltage power supply of the TOS54 series uses the PWM switching method, if the test voltage is 500V or less, the switching and spike noise proportions are large. The lower the test voltage, the greater the waveform is distorted.

DC output section (DCW only)

*1 When tests are performed consecutively, output time limit and rest time may become necessary depending on the upper limit setting.
*2 In the following conditions, charging current may activate a FAIL judgment or trigger the protection function. EUT capacitance: 1μF; Rise Time: 1.0 second or less; Judge Delay: 1.2 seconds or less.
*3 Maximum capacitance that can be discharged within 2 seconds in a DC withstanding voltage test. Tests can still be conducted beyond the maximum capacitance, but the discharge time will increase.

Common specifications

Digital voltmeter

*1 The true rms value and the average response rms value, require a response time of at least 50 ms in order to meet the measurement accuracy.

Digital ammeter

*1 When the humidity is 70% or higher, add 50μA. During AC voltage tests, current also flows in the stray capacitance of items such as the test leads and tools. For details on stray capacitance, see “Stray Capacitance of AC Withstanding Voltage Tests”.
*2 The true rms value and the average response rms value, require a response time of at least 50 ms in order to meet the measurement accuracy.

*1 In the following conditions, charging current may activate a FAIL judgment or trigger the protection function. EUT capacitance: 1μF; Rise Time: 1 second or less; Judge Delay: 1.2 seconds or less.
*2 When the humidity is 70% or higher, add 50μA. During AC voltage tests, current also flows in the stray capacitance of items such as the test leads and tools. For details on stray capacitance, see “Stray Capacitance of AC Withstanding Voltage Tests”.

*1 If Phase Shift is set to 90°, the time for quarter-wave length is fixed as Rise Time; therefore, the voltage is output for Test Time + 1/4 cycles. For example, If Test Time is set to 2, Time Unit to Cycle, Phase Shift to 90°, and Frequency to 50 Hz, voltage is output for approx. 45 ms (20 ms × (2 + 1/4 cycles)).

*1 In the following conditions, charging current may activate a FAIL judgment or the protection function: EUT capacitance: 2μF; Rise Time: seconds or less; Judge Delay: 2.0 seconds or less; Low Pass Filter: OFF
*2 Maximum capacitance that can be discharged within 2 seconds in a insulation resistance test. Tests can still be conducted beyond the maximum capacitance, but the discharge time will increase.

Digital voltmeter

Resistance meter

*1 Humidity: 70%rh or less (no condensation), when there is no interference caused by wobbly test leads or other problems. For measurements of 200 nA or less, the humidity 50%Rh or less.

*1 In the following conditions, charging current may activate a FAIL judgment or the protection function: EUT capacitance: 2μF; Rise Time: 1.5 seconds or less; Judge Delay: 2.0 seconds or less; Low Pass Filter: OFF
*2 Humidity: 70%rh or less (no condensation), when there is no interference caused by wobbly test leads or other problems.
*3 For judgments of 5μA or less, a test time of at least 1.0 seconds is necessary.
*4 When the low pass filter is set to medium, a test time of at least 0.3 seconds is required. When the low pass filter is set to slow, a test time of at least 0.5 seconds is required.

*1 Pollution is addition of foreign matter (solid, liquid or gaseous) that may produce a reduction of dielectric strength or surface resistivity. Pollution Degree 2 assumes that only non-conductive pollution will occur except for an occasional temporary conductivity caused by condensation.
*2 Does not apply to specially ordered or modified products.
*3 Only for models with CE marking / UKCA marking on their body.
*4 This is a Class A instrument. This product is intended for use in an industrial environment. This product may cause interference if used in residential areas. Such use must be avoided unless the user takes special measures to reduce electromagnetic emissions to prevent interference to the reception of radio and television broadcasts.
*5 This product belongs to Group 1 products. This product does not generate and/or use intentionally radio-frequency energy, in the form of electromagnetic radiation, inductive and/or capacitive coupling, for the treatment of material or inspection/analysis purpose.
*6 The TOS54 series is a Class I device. Be sure to ground the protective conductor terminal of the TOS54 series. The safety of this product is guaranteed only when the product is properly grounded.