6

U1251A/U1251B FREQUENCY SENSITIVITY DURING VOLTAGE MEASUREMENT

FREQUENCY SENSITIVITY AND TRIGGER LEVEL

INPUT RANGE

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

U1252A/U1252B/U1253A/U1253B FREQUENCY SENSITIVITY DURING VOLTAGE MEASUREMENT

FREQUENCY SENSITIVITY AND TRIGGER LEVEL

INPUT RANGE

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 ~ 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

RANGE

RESOLUTION

ACCURACY

MIN. INPUT

FREQUENCY

U1251A/2A

U1253A

99.999 Hz

0.001 Hz

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] Input impedance: Refer to Table A on page 8.

[2] Crest factor ≤ 3.0 at full scale, 5.0 at half scale except the 1000 mV and 1000 V ranges where it is 1.5 at full scale, 3.0 at half scale.

For non-sinusoidal waveform, add 0.1% of reading ± 0.3% of range.

[3] The additional error to be added as frequency >20 kHz and signal input <10% of range: 3 counts of LSD per kHz.

[4] The input signal is lower than 20,000,000 V-Hz (the product of voltage and frequency).

[5] Input current >35 µArms.

[6] 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.

[7] Input current < 3 Arms.

[8] For non-square wave signals, add 5 counts.