Users manual
ET3260 and ET3260A
6 1/2 Digit Multimeter
48
6.2.1 Additional error
Integral time
Power period number
NPLC
Digit
Additional error
DC voltage (% of
measurement range)
DC current (% of
measurement range)
Resistance
(%
of
measurement range)
100 PLC
6
½
0
0
0
10 PLC
6
½
0
0
0
2 PLC
6
½
0
0
0
1 PLC
5
½
0.001
0.001
0.001
0.2 PLC
5
½
0.001 + 20uV
0.001 + 4uA
0.001 + 20m
Ω
0.1PLC
4
½
0.002 + 20uV
0.002 + 4uA
0.002 + 20 m
Ω
0.02PLC
4
½
0.010 + 20uV
0.010 + 4uA
0.010 + 20 m
Ω
6.3 AC Characteristics
6.3.1 Basic characteristics
AC voltage:
AC voltage technical indicator refers to the technical indicator under AC sine signal with >5%
measurement range, and for the 1%-5% measurement ranges and <50 kHz signals, the allowable
increased error is 0.1% of the measurement range, and for frequency of 50kHz-100kHz, the
allowable increased error is 0.13% of the measurement range.
Maximum input: 750Vrms.
Input impedance: 1 M
Ω±
1%, shunt capacitance <100pF
Measurement method: AC coupling, virtual value response.
Maximum DC offset: not lower than 1000V.
AC filter bandwidth:
Slow: 3Hz-300 kHz;
Mid: 20Hz-300kHz;
Fast: 200Hz-300kHz;
Common mode control: 70 dB
，
50Hz
（
or 60 Hz
）±
0.1% (1 k
Ω
imbalance).
Maximum crest factor (CF): 5:1, in case of full measurement range.
Additional crest factor error (<100 Hz): CF 1-2
，
0.05 %
；
CF 2-3
，
0.2 %
；
CF 3-4
，
0.4 %
；
CF 4-5
，
0.5 %.
Voltage frequency product: 8
×
10
7
HzV, all the measurement ranges.
Sine wave transfer accuracy: 10Hz-50kHz
：
20ppmFS
；
50kHz-300kHz
：
50ppmFS.
AC current:
The following AC current technical indicator refers to the technical indicator of sine wave whose
amplitude is larger than 5% of measurement range, and for input of 1%-5% of measurement
range, the allowable increased additional error is 0.1% of the measurement range.
Input protection: Built-in fuses + external replaceable fuses;
Measurement method: AC coupling, virtual value response;
