E1412A Datasheet, PDF (8/11 Pages) Agilent(Hewlett-Packard) – 6.5-Digit High-Accuracy Multimeter C-Size

Frequency and Period Specifications
Frequency and Period Accuracy (% of reading):
Specifications are for 1-hour warm-up at 6.5 digits.
Function
Range²
Frequency
24 Hour¹
90 Day
1 Year


23°C ± 1°C 23°C ± 5°C 23°C ± 5°C

Frequency, Period 100 mV to 300 V 3 Hz-5 Hz
0.10
0.10
0.10
Frequency, Period 100 mV to 300 V 5 Hz-10 Hz
0.05
0.05
0.06
Frequency, Period 100 mV to 300 V 10 Hz-40 Hz
0.03
0.03
0.03
Frequency, Period 100 mV to 300 V 40 Hz-300 kHz 0.006
0.01
0.01
Temperature
Coefficient
0°C - 18°C
28°C - 55°C
0.005
0.005
0.001
0.001
1 _{Relative to calibration standards.}
2 _{20% overrange on all ranges, except 300 Vac range which has 1% overrange.}

Measuring Characteristics:
Measurement method:
Reciprocal-counting technique. AC-coupled input using the ac voltage measurement function.
Voltage ranges:
100 mV rms full scale to 300 V rms. Auto or manual ranges.
Gate time:
10 ms, 100 ms, or 1 s
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 fully settle
(up to 1 s) 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.
Max. reading rate:
1K
8