6½ Digit PXI Digital Multimeters (M9181A, M9182A, M9183A).pdf - 第17页

Find us at www. keysigh t.com Page 17 Resistance t o capacita nce 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 Measure ment method Delt a - sigma A /D con…

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Measurement Characteristics (continued)
Transaction Speed
Transactional I/O speed is a single reading measurement. This is important when you are taking many
single measurements with the DMM. The M9183A delivers the highest transactional measurement speed
in its class. These fast readings, up to 15,000 readings per second with a read interval rate of 66 µs,
provides the lowest latency, translating into higher test-system throughput and lower cost of test per unit
tested. Variable delay can be programmed to allow fully settled readings in most configurations.
System Reading and Throughput Rates (M9182A/3A)
Switching ranges within a function
Aperture (A)
Range change time (ms)
DCV
A ≤ 20 ms
(A × 0.2) + 15
A > 20 ms
A + 15.6
Resistance (2-wire or 4-wire)
A < 33 ms
(A × 0.05) + 15.5
A ≥ 33 ms
A + 13
DCI (200 mA or 2 A to any other
range)
A ≤ 40 ms
4.2
A > 40 ms
15.7
DCI (all other ranges)
All apertures
1
Capacitance
All apertures
12
Switch between functions
Aperture (A)
Function change time (ms)
DCV
A < 16 ms
15.6
A ≥ 16 ms
A + 25
Resistance to DCI
A < 16.66 ms
7.8
16.66 ms ≤ A < 40 ms
A × 0.65
40 ms < A < 66.66 ms
7.8
A ≥ 66.66 ms
(A × 0.51) + 45
DCV to capacitance
A < 33.33 ms
23.4
A ≥ 33.33 ms
(A × 0.65) + 50
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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
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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