6½ Digit PXI Digital Multimeters (M9181A, M9182A, M9183A).pdf - 第18页

Find us at www. keysigh t.com Page 18 Peak input 8 x 10 6 V Hz pr oduct (ex ample: 250 V @ 32 kHz) Input over voltage protecti on M9181A: 24 0 VAC on volta ge inputs M9182A/3A : 250 VAC all ra nges ACV nois e rejecti on …

100%1 / 22
Find us at www.keysight.com Page 17
Resistance to
capacitance
A ≤ 33.33 ms
23.4
33.33 ms < A < 80 ms
(A × 2) + 35
80 ms ≤ A < 160 ms
23.4
A ≥ 160 ms
160
DC Voltage
Measurement
method
Delta-sigma A/D conversion
Input resistance
200 mV, 2.0 V ranges: >10 GΩ with typical leakage of < 50 pA;
M9181A: 20 V, 200 V ranges: 10.0 MΩ
M9182A/3A: 20 V, 200 V, 300 V ranges: 10.0 MΩ
Input isolation
M9181A: 240 V from Earth ground
M9182A/3A: 250 V from Earth ground
Input overvoltage
protection
M9181A: 240 VDC on voltage inputs
M9182A/3A: 250 VDC all ranges
DCV noise rejection M9181A: Normal mode rejection at 50, 60, or 400 Hz ± 0.5%; > 90 dB
(apertures ≥ 0.160 s); CMRR (1 kΩ lead imbalance) ≥ 100 dB
M9182A/3A: Normal mode rejection at 50, 60, or 400 Hz ± 0.5%; > 95 dB
(apertures ≥ 0.160 s); CMRR (1 kΩ lead imbalance) ≥ 120 dB
True RMS AC Voltage
Measurement
method
M9181A: AC coupled (10 Hz to 100 kHz) true RMS — measures the AC
component only. Analog RMS DC converter.
M9182A/3A: AC coupled (10 Hz to 100 kHz) true RMS — measures the AC
component of an input waveform that consists of AC and DC components.
Crest factor
Maximum crest factor of 4 at full scale, 7 at 10% of range
Input impedance
1 MΩ, in parallel with < 300 pF
Settling time
< 0.5 sec to within 0.1% of final value
Fast RMS (M9182A/3A): < 0.05 sec to within 0.1% of final value
Find us at www.keysight.com Page 18
Peak input
8 x 10
6
V Hz product (example: 250 V @ 32 kHz)
Input overvoltage
protection
M9181A: 240 VAC on voltage inputs
M9182A/3A: 250 VAC all ranges
ACV noise rejection Common mode rejection at 50 Hz or 60 Hz; 1 kΩ imbalance in either lead
> 60 dB
Resistance
Measurement
method
Selectable 2-wire or 4-wire. Current source referenced to LO output
Offset compensation
(M9183A only)
All ranges, use with apertures > 5 ms
Voffset + (I*R) < 2.2 V for ranges ≥ 2 kΩ
Voffset + (I*R) < 0.22 V for ranges < 2 kΩ
Maximum test
voltage
M9181A: 240 mV for 200 Ω ranges; 2.4 V for 20 kΩ to 20 MΩ ranges
M9182A/3A: 240 mV for 20 Ω and 200 Ω ranges; 2.4 V for 20 kΩ to 20 MΩ
ranges
M9183A only: 1.0 V for 200 MΩ range
Maximum lead
resistance
(4-wire)
50 kΩ for 200 kΩ, 2.0 MΩ, and 20 MΩ ranges; 5 kΩ for 20 kΩ range
500 Ω for 200 Ω and 2 kΩ ranges; 50 Ω for 20 Ω range
Input protection
M9181A: 240 V on all ranges
M9182A/3A: 250 V on all ranges
DC Current
Shunt resistance
10 Ω for 2 mA and 20 mA, 0.1 Ω for 200 mA and 2 A;
Virtual zero shunt for 200 μA, 20 μA, 2 μA, and 200 nA range (M9183A only)
Input protection
Protected with 2.5 A, 250 V fast blow fuse
True RMS AC Current
Measurement
method
AC coupled true RMS measurement (measures the AC component only.)
Analog RMS DC converter.
Shunt resistance
10 Ω for 2 mA and 20 mA, 0.1 Ω for 200 mA and 2 A
Input protection
Protected with 2.5 A, 250 V fast blow fuse
Find us at www.keysight.com Page 19
Frequency and period (M9182A and M9183A)
Measurement method
Direct (conventional) counting
Input impedance
1 MΩ with < 300 pF
Sensitivity (130 Hz)
.001 Hz
Totalizer (M9183A only)
Active edge polarity
Positive or negative transition
Maximum count
10,000,000,000
Allowed rate
1 to 30,000 events per second
Threshold
Set threshold DAC
Accuracy
±2 counts
Capacitance (M9182A and M9183A)
Measurement method Differential charge balance: variable currents used to stimulate dV/dt
response.
Connection type
2-wire