Frequency And Period Characteristics - HP E1312A User Manual

Frequency and Period Characteristics

Accuracy Specifications
Function Range [3]
Frequency, 100mV
Period
300V
Additional Low-Frequency Errors (% of reading) [4]
Integration Time (number PLCs)
Frequency 100 & 10
3Hz-5Hz 0
5Hz-10Hz 0
10Hz-40Hz 0
40Hz-100Hz 0
100Hz-300Hz 0
300Hz-1kHz 0
>1kHz 0
Measuring Characteristics
Frequency and Period
Measurement Method:
Voltage Ranges:
Gate Time:
Settling Considerations
Errors will occur when attempting to measure the frequency or period of an input following a dc offset voltage
change. The input blocking RC time constant must be allowed to adequately settle (up to 1 second) before the
most accurate measurements are possible.
Measurement Considerations
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.
Appendix A
±
(% of reading) [1] [4]
Frequency
3Hz - 5Hz
5Hz - 10Hz
to 10Hz - 40Hz
40Hz - 300kHz
1 & 0.2 0.02
0.12 0.12
0.17 0.17
0.2 0.2
0.06 0.21
0.03 0.21
0.01 0.07
0 0.02
Reciprocal-counting technique. AC-coupled input using the ac voltage
measurement function.
100 mV rms full scale to 300V rms. Auto or manual ranges.
10 ms, 100 ms or 1 second.
HP E1312A and HP E1412A Multimeter Specifications
24 Hour [2] 90 Day
23°C ± 1°C 23°C ± 5°C
0.10 0.10
0.05 0.05
0.03 0.03
0.006 0.01
Temperature
Coefficient
1 Year 0°C - 18°C
23°C ± 5°C
28°C - 55°C
0.10 0.005
0.05 0.005
0.03 0.001
0.01 0.001
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