Agilent Technologies U1251B User's And Service Manual page 136

6 Performance Tests and Calibration
Step Test Function
19 Press
A mode
20 Turn the rotary switch to the
position
Duty Cycle
Amplitude
122
Range
button to go to 5 A
3A
10 A
Square Wave
Output
120 Hz @ 50%
4800 Hz @ 50%
100 Hz @ 50%
100 Hz @ 25%
100 Hz @ 75%
4800 Hz @
99.609%
[1] The additional error to be added as frequency > 20 kHz and signal input <
10% of range: 300 counts of LSD per kHz.
[2] The accuracy could be 0.05% + 10, always use relative function to zero
thermal effect (short test leads) before measuring the signal.
[3] The accuracy of 500
[4] For range of 50 M /500 M , the RH is specified for < 60%.
[5] The accuracy is specified for < 50nS and after Null function as open test
lead.
[6] All frequency counters are susceptible to error when measuring low voltage,
low-frequency signals. Shielding inputs from external noise pickup is critical for
minimizing measurement errors.
[7] Use the Null mode to zero residual
5520A Output
5 A, 1 kHz
3 A, 5 kHz
[11]
10 A, 1 kHz
Use 53131A
Use 34410A
and 5k is specified after the Null function.
Agilent U1251B/U1252B User's and Service Guide
Error from nominal 1 year
U1251B U1252B
± 42 mA ± 37 mA
± 96 mA ± 96 mA
± 100 mA ± 90 mA
N/A ± 26 mHz
N/A ± 260 mHz
N/A ± 0.398%
N/A ± 0.398%
N/A ± 0.398%
N/A ± 0.2V
[12]
[12]
[12]