6½ Digit PXI Digital Multimeters (M9181A, M9182A, M9183A).pdf - 第15页
Find us at www. keysigh t.com Page 15 Measurement Characteristics Measurement aperture Maximum readings per second Resolution M9181A Resolution vs. Aperture and Reading Rate for DCV, DCI, Ω 1.28 s 0.8 6½ digits (21 bits)…
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Triggering Characteristics
The M9182A and M9183A have advanced triggering capabilities that exceed those found on other digital
multimeters. Advanced triggering enables you to obtain the signal you need and accurately measure it, in
a variety of applications.
External hardware trigger
Trigger input voltage level range (at DIN 7 connector)
+3 to +15 V activates the trigger
Minimum trigger pulse width
Aperture + 50 µs
Trigger input impedance
3 kΩ
Edge
Selectable positive or negative edge
PXI bus trigger inputs
Trigger input voltage level range (via PXI backplane)
CMOS level (see PXI standard)
Minimum trigger pulse width
Aperture + 50 µs
Edge
Selectable positive or negative edge
Trigger features
Trigger sources Immediate, PXI trigger, external DIN connector, analog
threshold trigger source
Trigger delay
[Auto delay (default delay) ensures 1st
reading accuracy in most configurations]
Measurement delay
50 µs to 15 s
Resolution
1µs to 65 ms and 16µs above 65ms
Reading storage
Circular buffer - 80 readings
Multi Sample Mode
(DCV and DCI functions only)
Aperture range
2.5 µs to 160 ms (M9183A)
130 µs to 160 ms (M9182A)
Maximum read
interval range
1 sec for apertures ≥ 625 µs,
else 65 ms
Reading per trigger Up to 80 readings (maximum of 78
pre-triggers or a maximum of 80
post triggers)
Trigger sources
PXI trigger, external DIN
connector, and analog threshold
(accuracy within 5% of range)
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Measurement Characteristics
Measurement aperture
Maximum readings per second
Resolution
M9181A Resolution vs. Aperture and Reading Rate for DCV, DCI, Ω
1.28 s
0.8
6½ digits (21 bits)
160 ms
6
6 digits (20 bits)
20 ms
45
5½ digits (18 bits)
10 ms
85
5 digits (17 bits)
5 ms
150
4½ digits (16 bits)
M9182A / M9183A Resolution vs. Aperture and Reading Rate for DCV, DCI, Ω
10 ms
98
6½ digits (22 bits)
625 µs
1,200
5½ digits (18 bits)
130 µs
4,500
4½ digits (14 bits)
2.5 µs
15,000 (M9183A only)
1
4½ digits (14 bits)
1. 15,000 readings/second represent a typical maximum with a measurement aperture of 2.5 µs. Results will vary, depending
on what PC hardware, PXI hardware, and driver are used.
Time frame of a single measurement
Minimum read interval = 66 µs (M9183A)
Minimum read interval = 222 μs (M9182A)
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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