Measurement-computing AI-EXP48 Bedienungsanleitung PDF herunterladen (Seite 14)

Chapter 3

Specifications

Typical for 25 °C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Analog input

Table 1. Analog input specifications

Number of channels

48 single-ended/24 differential inputs

Voltage measurement speed

1 µs per channel

Input ranges, software or sequencer programmable

Bipolar: ±10 V, ±5 V, ±2 V, ±1 V , ±0.5 V, ±0.2 V, ±0.1 V,

universal thermocouple

Signal to noise and distortion

72 dB typical for ±10 V range, 1 kHz fundamental

Total harmonic distortion

-80 dB typical for ±10 V range, 1 kHz fundamental

Bias current

40 pA typical (0 °C to 35 °C)

Crosstalk

-75 dB DC to 60 Hz; -65 dB @ 10 kHz, typical

Input impedance

10 MΩ single-ended, 20 MΩ differential

Over-voltage protection

±30 V

Accuracy

Table 2. Analog input accuracy specifications

Voltage range

(note 1)

Accuracy

±(% of reading + % range)

23°C ±10 °C, 1 year

Temperature coefficient

±(ppm of reading + ppm range)/°C

Noise (cts

RMS) (note 2)

-10 V to 10 V

0.031% + 0.008%

14 + 8

2.0

-5 V to 5 V

0.031% + 0.009%

14 + 9

3.0

-2 V to 2 V

0.031% + 0.010%

14 + 10

2.0

-1 V to 1 V

0.031% + 0.02%

14 + 12

3.5

-500 mV to 500 mV

0.031% + 0.04%

14 + 18

5.5

-200 mV to 200 mV

0.036% + 0.05%

14 + 12

8.0

-100 mV to 100 mV

0.042% + 0.10%

14 + 18

14.0

Note 1: Specifications assume differential input single-channel scan, 1 MHz scan rate, unfiltered,

CMV=0.0 V, 30 minute warm-up, exclusive of noise, -FS to +FS.

Note 2: Noise reflects 10,000 samples at 1 MHz, typical, differential short

Thermocouples

Table 3. TC types and accuracy (Note 3)

TC type

Temperature range (°C)

Accuracy (±°C)

Noise typical (±°C)

-200 to + 760

1.7

0.2

-200 to + 1200

1.8

0.2

-200 to + 400

1.8

0.2

-270 to + 650

1.7

0.2

-50 to + 1768

4.8

1.5

-50 to + 1768

4.7

1.5

-270 to + 1300

2.7

0.3

+300 to + 1400

3.0

1.0

Note 3: Assumes 16384 oversampling applied, CMV = 0.0V, 60 minute warm-up, still environment, and

25 °C ambient temperature; excludes thermocouple error; TC

= 0° C for all types except B

(1000 °C)

1 2 ... 9 10 11 12 13 14 15 16 17 18 19

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