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Users manual
[1] Pre-heat for 60 minutes, slow AC filter and sine signal input.
[2] Except for ACV 750V, ACI 12A measurement ranges, other measurement ranges can have
20% of over measurement range measurement.
[3] Typical error under 1MHz is 30% of the reading.
[4] AC 750V measurement range is restricted to 100KHz or 8 ×10
[5] Relative to standard calibration.
6.3.3 Additional error
Additional low-frequency error (% of the reading) Additional crest factor error (non-sine wave)
Frequency
Slow
10Hz-20Hz
0
20Hz-40Hz
0
40Hz-100Hz
0
100Hz-200Hz
0
200Hz-1kHz
0
>1kHz
0
6.4 Frequency and Period Characteristics
Gate time can be set as 1s, 100ms and 10ms or a wider range.
Stability refers that after DC offset voltage changes, the time to reach stable and accurate
measurement result is not longer than 1 second.
Measurement method is that equal precision frequency testing technology and AC coupling input
use AC voltage measurement function.
6.4.1 Uncertainty indicators
Accuracy is expressed by ± (ppm measurement value) [1]
Function
Measurement
range [2]
Frequency
100 mV-750V[4]
period
[1] Pre-heat for 60 minutes, and use 1 second of gate time.
[2] Except for 750V measurement ranges, other measurement ranges can have 20% of over
measurement range measurement.
[3] Relative to standard calibration.
[4] Input >100mV. For 10mV-100mV, multiply percentage measurement error by 10.
ET3260 and ET3260A
5kHz～10 kHz
AC filter
Mid
Fast
\
0.74
\
0.22
0.06
0.73
0.01
0.22
0
0.18
0
0
Frequency
24-hour [3]
(23±1℃)
3-5 Hz
500
5-10 Hz
300
10-40 Hz
200
40Hz-300kHz
50
6 1/2 Digit Multimeter
0.3 + 0.04
0.3 + 0.04
7
voltage frequency product.
Crest coefficient
1-2
2—3
3—4
4—5
90
days(23±5℃)
500
300
200
100
50
0.3+ 0.04
0.015 + 0.006
Error (% of the reading)
0.05
0.15
0.30
0.40
1
year
Temperature
(23±5℃)
coefficient
0°-18°/28-55°
500
20
300
20
200
10
100
10
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