U1451A Datasheet, PDF (15/20 Pages) Keysight Technologies – Insulation Resistance Testers

15 | Keysight | U1450A/U1460A Insulation Resistance Testers - Data Sheet
U1453A/U1461A frequency speciications
Frequency specifications with accuracy of ± (% of reading + number of least significant digit)^{1, 2}
Range
99.99 Hz
999.9 Hz
9.999 kHz
99.99 kHz
999.9 kHz
9.999 MHz
Resolution
0.01 Hz
0.1 Hz
0.001 kHz
0.01 kHz
0.1 kHz
0.001 MHz
Accuracy
0.02% + 1
0.02% + 1
0.02% + 1
0.02% + 1
0.2% + 1 @ ≤ 100 kHz
0.2% + 1 @ ≤ 100 kHz
Minimum input frequency
0.5 Hz
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 ilter (model U1461A only) may help you to ilter out the noise and
achieve a stable reading.
U1461A duty cycle and pulse width speciications
Duty cycle and pulse width specifications with accuracy of ± (% of reading + number of least significant digit)²
Function
Duty cycle²
Pulse width³
Mode
DC coupling
AC coupling
–
–
Range
99.9%
99.9%
999.9 ms
2000 ms
Resolution
–
–
0.01 ms
0.1 ms
Accuracy at full scale
0.3% per kHz + 0.3%
0.3% per kHz + 0.3%
(duty cycle accuracy/frequency) + 0.01 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 ilter (model U1461A only) may help you to ilter 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 speciications
Temperature specifications with accuracy of ± (% of reading + offset error)¹
Thermal type
K
J
Range
–200 to 1372 °C
–328 to 2502 °F
–200 to 1200 °C
–346 to 2192 °F
Resolution
0.1 °C
0.1 °F
0.1 °C
0.1 °F
Accuracy
1% + 1 °C
1% + 1.8 °F
1% + 1 °C
1% + 1.8 °F
The following statements are true for temperature measurements:
– The speciications above are speciied 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 speciied according to the safety standards of EN/IEC-60548-1 and NIST175