Datasheet

15 | Keysight | U1450A/U1460A Insulation Resistance Testers - Data Sheet
U1453A/U1461A frequency specifications
Frequency specifications with accuracy of ± (% of reading + number of least significant digit)
1, 2
Range Resolution Accuracy Minimum input frequency
99.99 Hz 0.01 Hz 0.02% + 1 0.5 Hz
999.9 Hz 0.1 Hz 0.02% + 1
9.999 kHz 0.001 kHz 0.02% + 1
99.99 kHz 0.01 kHz 0.02% + 1
999.9 kHz 0.1 kHz 0.2% + 1 @ ≤ 100 kHz
9.999 MHz 0.001 MHz 0.2% + 1 @ ≤ 100 kHz
1. Overload protection: 1000 V; input signal is < 20,000,000 V × Hz (product of voltage and frequency)
2. The frequency measurement is susceptible to error when measuring low-voltage and low-frequency signals. Shielding inputs from external noise
pickup is critical for minimizing measurement errors. Turning on the low-pass filter (model U1461A only) may help you to filter out the noise and
achieve a stable reading.
U1461A duty cycle and pulse width specifications
Duty cycle and pulse width specifications with accuracy of ± (% of reading + number of least significant digit)
2
Function Mode Range Resolution Accuracy at full scale
Duty cycle
2
DC coupling 99.9% – 0.3% per kHz + 0.3%
AC coupling 99.9% – 0.3% per kHz + 0.3%
Pulse width
3
– 999.9 ms 0.01 ms (duty cycle accuracy/frequency) + 0.01 ms
– 2000 ms 0.1 ms (duty cycle accuracy/frequency) + 0.1 ms
1. Overload protection: 1000 V; input signal is < 20,000,000 V × Hz (product of voltage and frequency)
2. The frequency measurement is susceptible to error when measuring low-voltage and low-frequency signals. Shielding inputs from external noise
pickup is critical for minimizing measurement errors. Turning on the low-pass filter (model U1461A only) may help you to filter out the noise and
achieve a stable reading.
3. The accuracy for duty cycle and pulse width measurements is based on a 6 V square-wave input to the DC 6 V range. For AC couplings, the duty
cycle range can be measured within the range of 10% to 90% for signal frequencies > 20 Hz.
4. The range of the duty cycle is determined by the frequency of the signal: {10 µs × frequency × 100%} to {[1 – (10 µs × frequency)] × 100%}
5. The pulse width (positive or negative) must be > 10 µs. The range of the pulse width is determined by the frequency of the signal.
U1453A/U1461A temperature specifications
Temperature specifications with accuracy of ± (% of reading + offset error)
1
Thermal type Range Resolution Accuracy
K –200 to 1372 °C 0.1 °C 1% + 1 °C
–328 to 2502 °F 0.1 °F 1% + 1.8 °F
J –200 to 1200 °C 0.1 °C 1% + 1 °C
–346 to 2192 °F 0.1 °F 1% + 1.8 °F
1. The following statements are true for temperature measurements:
– The specifications above are specified after 60 minutes of warm-up time
– The accuracy does not include the tolerance of the thermocouple probe
– Do not allow the temperature sensor to contact a surface that is energized above 30 VRMS or 60 VDC. Such voltages pose a shock hazard.
– Ensure that the ambient temperature is stable within ± 1 °C and that the Null function is used to reduce the test lead’s thermal effect and
temperature offset. Before using Null function, set the tester
to measure temperature without ambient compensation and keep the thermocouple probe as close to the tester as possible (avoid contact with
any surface that has a different temperature from the ambient temperature).
– When measuring temperature with respect to any temperature calibrator, try to set both the calibrator and tester with an external reference
(without internal ambient compensation). If both the calibrator and tester are set with internal reference (with internal ambient compensation),
some deviations may show between the readings of the calibrator and tester, due to differences in ambient compensation between the calibrator
and tester. Keeping the tester close to the output terminal of calibrator will help reduce the deviation.
– The temperature calculation is specified according to the safety standards of EN/IEC-60548-1 and NIST175