5989-5509.pdf - 第6页

Page 6 Find us at www .keysight.com U1 252B / U1 253 B AC voltage sp ecifications Funct ion Range R esolution Accur acy ± (% of re ading + no. of least signi ficant digit ) Frequency 20 Hz ~ 4 5 Hz 45 H z ~ 1 kHz 1 kH z …

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DC Specifications
1. Input impedance: Refer to Table A on page 10.
2. The accuracy could be improve to 0.05%+10 for U1251B or 0.05%+5 for U1252B and U1253B by using the Null function to zero out the thermal effect before measuring the signal.
3. These specifications are defined for 2-wire ohms using Math Null. Without Math Null, add 0.2 ohm additional error.
4. Maximum open voltage: < +4.2 V
5. The accuracy of 500 Ω and 5 kΩ is specified after NULL function, which is used to subtract the test lead resistance and the thermal effect.
6. For the range of 50 MΩ and 500 MΩ, the R.H. is specified for <60%.
7. The accuracy is specified for <50 nS and after NULL function with open test lead.
8. Always use the NULL function to zero out thermal effect with open test lead before measuring the signal. If the NULL function is not used, an additional 20 counts needs to be added to the DC
current accuracy. Thermal effect could occur due to the following:
– Wrong operation to measure the high voltage of 50 V ~ 1000 V for resistance, diode, and mV measurements.
– After battery-charging has completed.
– After measuring a current greater than 440 mA, it is suggested that the meter be left to cool down for twice the measuring time used.
9. Current can be measured up to 10 A continuously. An additional 0.5% needs to be added to the specified accuracy if the signal measured is in the range of 10 A~20 A for 30 seconds
maximum. After measuring a current of > 10 A, leave the meter to cool down for twice the measuring time used before application of low current measurement.
Function Range Resolution Test current/
burden voltage
Accuracy ± (% of reading + no. of least significant digit)
U1251B U1252B/U1253B
Voltage
1
50.000 mV 0.001 mV – 0.05 + 50
2
0.05 + 50
2
500.00 mV 0.01 mV – 0.03 + 5 0.025 + 5
1000.0 mV 0.1 mV –
5.0000 V 0.0001 V –
50.000 V 0.001 V –
500.00 V 0.01 V – 0.03 + 5
1000.0 V 0.1 V –
Resistance
3
500.00 Ω
5
0.01 Ω 1.04 mA 0.08 +10 0.05 + 10
5.0000 kΩ
5
0.0001 kΩ 416 µA 0.08 + 5 0.05 + 5
50.000 kΩ 0.001 kΩ 41.2 µA
500.00 kΩ 0.01 kΩ 4.12 µA
5.0000 MΩ 0.0001 MΩ 375 nA 0.2 + 5 0.15 +5
50.000 MΩ
6
0.001 MΩ 187 nA 1 + 10 1 + 5
500.00 MΩ
6
0.01 MΩ 187 nA N/A 3+10 < 200 MΩ / 8+10 > 200 MΩ
500.00 nS
7
0.01 nS 187 nA 1 + 20 1 + 10
Current 500.00 µA 0.01 µA 0.06 V (100 Ω) 0.1 + 5
8
0.05 + 5
8
5000.0 µA 0.1 µ A 0.6 V (100 Ω)
50.000 mA 0.001 mA 0.09 V (1 Ω) 0.2 + 5
8
0.15 + 5
8
440.00 mA 0.01 mA 0.9 V (1 Ω)
5.0000 A 0.0001 A 0.2 V (0.01 Ω) 0.3 + 10 0.3 + 10
10.000 A
9
0.001 A 0.4 V (0.01 Ω) 0.3 + 5
Diode test
8
– 0.1 mV 1.04 mA 0.05 + 5
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U1252B/U1253B AC voltage specifications
Function Range Resolution Accuracy ± (% of reading + no. of least significant digit)
Frequency
20 Hz ~ 45 Hz 45 Hz ~ 1 kHz 1 kHz ~ 5 kHz 5 kHz ~ 15 kHz 15 kHz~100 kHz
8
True RMS AC
voltage
1, 2, 7
50.000 mV 0.001 mV 1.5+60 0.4+40 0.7+40 0.75+40 3.5+120
500.00 mV 0.01 mV 0.4+25 0.4+25
1000.0 mV 0.1 mV
5.0000 V 0.0001 V 0.6+25 1.5+40
50.000 V 0.001 V 0.4+25
500.00 V 0.01 V N/A N/A
1000.0 V 0.1 V 0.4+40 0.4+40 N/A N/A
U1251B AC current specifications
Function Range Resolution Accuracy ± (% of reading + no. of least significant digit)
Frequency
30 Hz ~ 45 Hz 45 Hz ~ 2 kHz 2 kHz ~ 20 kHz
6
AC current
2, 7
500.00 µA
3
0.01 µA 1.5+50 0.8+20 3.0+80
5000.0 µA 0.1 µA 1.5+40 3.0+60
50.000 mA 0.001 mA
440.00 mA 0.01 mA
5.0000 A 0.0001 A 2.0+40
5
3+60, <3 A/5 kHz
10.000 A
4
0.001 A
U1251B AC voltage specifications
Function Range Resolution Accuracy ± (% of reading + no. of least significant digit)
Frequency
30 Hz ~ 45 Hz 45 Hz ~ 1 kHz 1 kHz ~ 5 kHz 5 kHz ~ 30 kHz
True RMS Ac
voltage
1, 2, 7
50.000 mV 0.001 mV 1.0+60 0.6+40 1.0+40 1.6+60
500.00 mV 0.01 mV 0.6+25
1000.0 mV 0.1 mV 1.0+25 3.5+120
5.0000 V 0.0001 V
50.000 V 0.001 V
500.00 V 0.01 V N/A
1000.0 V 0.1 V 0.6+40 1.0+40 N/A
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U1252B/U1253B AC current specifications
Function Range Resolution Accuracy ± (% of reading + no. of least significant digit)
Frequency
20 Hz ~ 45 Hz 45 Hz ~ 1 Khz 1 Khz ~ 20 Khz
6
20 Khz~100 Khz
6 8
True RMS AC
current
2, 7
500.00 µA
3
0.01 µA 1.0+20 0.7+20 0.75+20 5.0+80
5000.0 µA 0.1 µA
50.000 mA 0.001 mA
440.00 mA 0.01 mA 1.5+20
5.0000 A 0.0001 A 1.5+20
5
3+60, <3 A/5 kHz
N/A
10.000 A
4
0.001 A
1. Input impedance: Refer to Table A on page 10.
2. ACV measurement is AC coupled; while ACmV and AC μA/mA/A measurement are DC coupled. All specifications are valid from 5% to 100% of range.
3. Input current >35 µARMS.
4. Current can be measured from 2.5 A up to 10 A continuously. An additional 0.5% needs to be added to the specified accuracy if the signal measured is in the range of 10 A ~ 20 A for 30
seconds maximum. After measuring a current of >10 A, leave the meter to cool down for twice the measuring time used before application of low current measurement.
5. Input current < 3 ARMS.
6. These specifications are for typical performance.
7. Crest factor ≤ 5 at half-scale, ≤ 3 at full-scale, and decrease reciprocally for overange as 3 * Full Scale / Input; except for 1000 mV and 1000 V ranges, where this ranges have crest factor ≤
3 at half-scale, ≤ 1.5 at full scale, and decrease reciprocally for overange as 1.5 * Full Scale / Input. For non-sinusoidal waveform, add 0.1 % of reading ± 0.3 % of range.
8. Additional error to be added for frequency > 15 kHz and signal input < 10 % of range: 3 counts of LSD per kHz.
9. 2% over-range on all ranges except AC 1000 V range.
10. The maximum displayable counts is 51000, except for 1000.0 mV, 1000.0 V and 10 A ranges, where the maximum displayable counts is 15000. “0.L” will
be shown for any resultant AC+DC voltage/current that exceeds the maximum displayable counts in manual range. Subject to operate within the product specifications.
U1252B/U1253B AC+DC voltage specifications
Function Range Resolution Accuracy ± (% of reading + no. of least significant digit)
Frequency
30 Hz ~ 45 Hz 45 Hz ~ 1 kHz 1 kHz ~ 5 kHz 5 kHz ~ 15 kHz 15 kHz~100 kHz
8
True RMS AC voltage
1, 2, 10
50.000 mv 0.001 mv 1.5+80 0.4+60 0.7+ 60 0.8+60 3.5+220
500.00 mV 0.01 mV 1.5+65 0.4+30 0.4+30 0.8+45 3.5+125
1000.0 mV 0.1 mV
5.0000 V 0.0001 V 0.6+30 1.5+45
50.000 V 0.001 V 0.4+30
500.00 V 0.01 V N/A N/A
1000.00 V 0.1 V 0.4+45 0.4+45 N/A N/A
U1252B/U1253B AC+DC current specifications
Function Range Resolution Accuracy ± (% of reading + no. of least significant digit)
Frequency
30 Hz ~ 45 Hz 45 Hz ~ 1 kHz
6
1 kHz ~ 20 kHz
6
True RMS AC current
10
500.00 µA
3
0.01 µA 1.1+25 0.8+25 0.8+25
5000.0 µA 0.1 µ A
50.000 mA 0.001 mA 1.2+25 0.9+25 0.9+25
440.00 mA 0.01 mA
5.0000 A 0.0001 A 1.8+30
5
0.9+30 3.3+70, <3 A/5 kHz
10.000 A
4
0.001 A 0.9+25