5989-5509.pdf - 第9页

Page 9 Find us at www .keysight.com U1 251 B f requency sensitiv ity during voltage mea sure ment Frequenc y sensitiv ity an d trigger level Inpu t ran ge 3 Minimum sensi tivit y (R.M .S. Sin e Wave) T rig ger le vel f o…

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Capacitance specifications
Range Resolution Accuracy Measuring rate at
full scale
Maximum display
10.000 nF 0.001 nF 1% + 8 4 times/sec. 11000 counts
100.00 nF 0.01 nF 1% + 5
1000.0 nF 0.1 nF
10.000 µF 0.001 µF
100.00 µF 0.01 µF
1000.0 µF 0.1 µF 1 time/sec.
10.000 mF 0.001 mF 0.1 times/sec.
100.00 mF 0.01 mF 3% + 10 0.01 times/sec
U1251B/U1252B temperature specifications
1,2,3
Thermocouple type Range Resolution Accuracy
ºC ºF ºC ºF
K –200 ~ 1372 ºC –328 ~ 2502 ºF 0.1 ºC /0.1 º F 0.3% + 3 ºC 0.3% + 6 ºF
J
(for U1252A/U1252B)
–210 ~ 1200 ºC –346 ~ 2192 ºF 0.1 º C/0.1 ºF 0.3% + 3 ºC 0.3% + 6 ºF
U1253B temperature specifications
1 2 3
Thermocouple type Range Resolution Accuracy
ºC ºF ºC ºF
K –200 ~ –40 °C –104 ~ –40 °F 0.1 ºC /0.1 º F 1% + 3 °C 1% + 5.4 °F
–40 ~1372 °C –40 ~ 2502 °F 0.1 °C /0.1 °F 1% + 1 °C 1% + 1.8 °F
J –210 ~ –40 °C –346 ~ –40 °F 0.1 °C /0.1 °F 1% + 3 °C 1% + 5.4 °F
–40 ~ 1200 °C –40 ~ 2192 °F 0.1 °C /0.1 °F 1% + 1 °C 1% + 1.8 °F
1. The accuracy does not include the tolerance of the thermocouple probe. The thermal sensor plugged into the meter should be placed in the operating environment for at least an hour.
2. Use the Null function to reduce the thermal effect. Before using the Null function, set the meter to no ambient compensation (0C) mode and keep the thermocouple probe as close to the meter
as possible, avoiding contact with any surface that has a different temperature from the ambient temperature.
3. When measuring temperature with respect to any temperature calibrator, try to set both the calibrator and the meter with an external reference (without internal ambient compensation). If both
the calibrator and the meter are set with internal reference (with internal ambient compensation), deviation may show between the readings of the calibrator and the meter, due to differences
in ambient compensation between the calibrator and the meter.
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U1251B frequency sensitivity during voltage measurement
Frequency sensitivity and trigger level
Input range
3
Minimum sensitivity
(R.M.S. Sine Wave)
Trigger level for DC coupling
(Maximum input for specified
accuracy = 10 x Range or 1000 V)
20 Hz - 100 kHz >100 kHz ~ 200 kHz < 100 kHz >100 kHz ~ 200 kHz
50.000 mV 10 mV 15 mV 10 mV 15 mV
500.00 mV 25 mV 35 mV 60 mV 70 mV
1000.0 mV 40 mV 50 mV 100 mV 150 mV
5.0000 V 0.25 V 0.5 V 0.5 V / 1.25 V (< 100 Hz) 0.6 V
50.000 V 2.5 V 5 V 5 V 6 V
500.00 V 25 V N/A 50 V N/A
1000.0 V 50 V N/A 300 V N/A
U1252B/U1253B frequency sensitivity during voltage measurement
Frequency sensitivity and trigger level
Input range
3
Minimum sensitivity
(RMS sine wave)
Trigger level for DC coupling
(Maximum input for specified
accuracy = 10 x range or 1000 V)
20 Hz ~ 200 kHz >200 kHz ~ 500 kHz < 100 kHz >100 kHz ~ 500 kHz
50.000 mV 10 mV 25 mV 10 mV 25 mV
500.00 mV 70 mV 150 mV 70 mV 150 mV
1000.0 mV 120 mV 300 mV 120 mV 300 mV
5.0000 V 0.3 V 1.2 V 0.6 V 1.5 V
50.000 V 3 V 5 V 6 V 15 V
500.00 V 30 V < 100 kHz N/A 60 V N/A
1000.0 V 50 V < 100 kHz N/A 120 V N/A
Frequency sensitivity during current measurement
Input range Minimum sensitivity (RMS sine wave)
20 Hz ~ 20 Khz
500.00 µA 100 µA
5000.0 µA 250 µA
50.000 mA 10 mA
440.00 mA 25 mA
5.0000 A 1 A
10.000 A 2.5 A
Frequency specifications
5
Range Resolution Accuracy Min. input frequency
1
U1251B/2B U1253B
99.999 Hz 0.001 Hz 0.02%+3
9
0.02%+3
9
1 Hz
999.99 Hz 0.01 Hz 0.02%+3, <600 kHz 0.02%+3, <600 kHz
9.9999 kHz 0.0001 kHz
99.999 kHz 0.001 kHz
999.99 kHz 0.01 kHz
1. The input signal is lower than the product of 20000000 V
x Hz (product voltage and frequency); overload protection:
1000 V.
2. The multimeter will automatically select the most appropriate
range when making frequency measurements.
3. Maximum input for specified accuracy = 10 x range or 1000
V.
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Peak hold
Signal width Accuracy for DC mV/voltage/current
Single event > 1 ms 2% + 400 for all ranges
Repetitive > 250 µs 2% + 1000 for all ranges
Duty cycle and pulse width
1
Function Mode Range Accuracy at full scale
Duty cycle DC Coupling 0.01% ~ 99.99% 0.3% per kHz + 0.3%
Pulse width 500 ms 0.01 ms 0.2% + 3
2000 ms 0.1 ms 0.2% + 3
1. The positive or negative pulse width must be greater than 10 µs, and the duty cycle range should be considered.
The pulse width range is determined by the frequency of the signal.
U1252B/U1253B square wave output
Output
2
Range Resolution Accuracy
Frequency 0.5, 1, 2, 5, 6
6
, 10, 15, 20, 25,
30, 40, 50, 60, 75, 80, 100, 120,
150, 200, 240, 300, 400, 480,
600, 800, 1200, 1600, 2400,
48000 Hz
0.01 Hz 0.005% + 2
Duty cycle
3
0.39% ~ 99.60% 0.390625% 0.4% of full scale
4
Pulse width
4
1/frequency Range/256 0.2 ms + range/256
Amplitude Fixed 0 ~ +2.8 V 0.1 V 0.2 V
U1252B/U1253B frequency counter specifications
Division Range Resolution Accuracy ± (% of reading +
no. of least significant digit)
Sensitivity Min. input
frequency
Maximum
measurement
level
U1252B U1253B
1
(secondary display “-1-“)
99.999 Hz 0.001 Hz 0.02% + 3
1
0.02% + 3
1
300 mV R.M.S. 0.5 Hz < 30 Vpp
999.99 Hz 0.01 Hz 0.002% + 5, <985
kHz
0.002% + 5,
< 985 kHz
100 mV R.M.S.
9.9999 kHz 0.0001 kHz
99.999 kHz 0.001 kHz
999.99 kHz 0.01 kHz 600 mV R.M.S.
9.9999 MHz 0.0001 MHz 0.002% + 5, < 1 MHz
100
(secondary display “-100-“)
9.9999 MHz 0.0001 MHz 0.002% + 5, < 20
MHz
0.002% + 5,
< 20 MHz
600 mV R.M.S. 1 MHz
99.999 MHz 0.001 MHz 600 mV R.M.S.