Measurement-computing 6224 Bedienungsanleitung PDF herunterladen (Seite 38)

6224 User’s Manual Specifications 9-1

Specifications – 6224 9

The following specifications are typical for the range –40 to 50°C, unless otherwise noted.

Input Characteristics

Number of analog channels ................................................ 12

Bridge completion

Full and half ................................................................ Internal

Quarter ......................................................................... External

ADC resolution ................................................................... 24 bits

Type of ADC ...................................................................... Delta-sigma (with analog pre-filtering)

Sampling mode ................................................................... Simultaneous

Data rates ( ) ..................................................................... (50kS/s)/ = 1, 2, ... 31.

Multiple device, channel sync skew

.................................. 1 Sample Period

Single device, channel-to-channel

matching (calibrated) .................................................... 350nS (max)

Master timebase (internal)

Frequency ........................................................................... 12.8 MHz

Accuracy ............................................................................. 100 ppm max

Nominal full-scale range 25 mV/V

Scaling coefficient ............................................................. 2.9802 nV/V per LSB

Overvoltage protection between any two terminals ........... 30 V

Accuracy

Measurement Conditions*

Percent of

Reading

Offset

Calibrated, max (–40 to 50 °C)

0.20%

0.0625 mV/V

Calibrated, typ (25 °C, ±5 °C)

0.05%

0.0125 mV/V

* Excluding offset null or shunt calibration.

Gain drift………………………………… ......................... 10 ppm/°C max

Offset drift

2.5 V excitation ................................... ....................... 0.6 µV/V per °C

3.3 V excitation ................................... ....................... 0.5 µV/V per °C

5 V excitation ...................................... ....................... 0.3 µV/V per °C

10 V excitation .................................... ....................... 0.2 µV/V per °C

Channel-to-channel matching (calibrated)

Input Signal Frequency (fin)

Gain

Typical

Maximum

0 to 1 kHz

0.15%

0.3%

1 to 20 kHz

0.4%

1.1%

Phase nonlinearity

0 to 1 kHz 0.001°

0 to 20 kHz 0.1°

Input delay ......................................................................... 4.8 µs + 38.4/

Refer to the synchronization section of chapter 1 for information regarding multiple devices.

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