Measurement Characteristics

Resolution vs. Aperture and Reading Rate for DCV, DCI, Ω

Measurement aperture

Maximum readings per second

Resolution

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

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.

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 high-

est 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.

Time frame of a single measurement

Minimum read interval = 66 µs (M9183A)

Minimum read interval = 222 μs (M9182A)

System Reading and Throughput Rates

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

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

-

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

10 mS

625 µS

130 µS

2.5 µS

Aperture reading rate

(< 1 NPLC)

M9182A

M9183A

Read Interval

Overhead

Command

Reception &

Processing

Variable Delay

Integrate & Convert

Process &

Transmit Data

DelayApertureOverhead

10 | Keysight | PXI Digital Multimeters, 6½ Digit, High Performance (M9182A, M9183A) - Data Sheet