Measurement Computing E-1608-OEM - Manual (Page 20)

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Accuracy
Analog input DC voltage measurement accuracy
Table 2. DC Accuracy components and specifications. All values are (±)
Range
Gain error
(% of reading) Offset error
(µV) INL error
(% of range)
Absolute
accuracy at
Full Scale
(µV) Gain
temperature
coefficient
(% reading/°C) Offset
temperature
coefficient
(µV/°C)
±10 V 0.024 915 0.0076 4075 0.0014 47
±5 V 0.024 686 0.0076 2266 0.0014 24
±2 V 0.024 336 0.0076 968 0.0014 10
±1 V 0.024 245 0.0076 561 0.0014 5
Noise performance
For the peak-to-peak noise distribution test, a differential input channel is connected to AGND at the input
terminal block, and 16384 samples are acquired at the maximum rate available at each setting.
Table 3. Noise performance specifications
Range Counts LSBrms
±10 V 6 0.91
±5 V 6 0.91
±2 V 7 1.06
±1 V 9 1.36
Settling time
Settling time is defined as the accuracy that can be expected after one conversion when switching from a
channel with a DC input at one extreme of full scale to another channel with a DC input at the other extreme of
full scale. Both input channels are configured for the same input range.
Table 4. Input settling time specifications in µS, typical
Range 4 µS settling accuracy (% FSR) 6 µS settling accuracy (% FSR) 10 µS settling accuracy (% FSR)
±10 V 0.0061 0.0031 0.0015
±5 V 0.0061 0.0031 0.0015
±2 V 0.0061 0.0031 0.0015
±1 V 0.0061 0.0031 0.0015