Campbell Scientific CR1000KD CR800 and CR850 Measurement and Control Systems - Page 290
Time Skew Between Measurements
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Section 8. Operation Table 60. Calibrate() Instruction Results Array Cal() Element 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Differential (Diff) Single-Ended (SE) SE Diff SE Diff SE Diff SE Diff SE Diff SE Diff SE Diff SE Diff SE Diff Descriptions of Array Elements Offset or Gain Gain Offset Offset Gain Offset Offset Gain Offset Offset Gain ±mV Input Range 250 25 25 25 7.5 7.5 7.5 2.5 2.5 2.5 Offset Offset Gain 5000 5000 5000 Offset Offset Gain Offset Offset Gain Offset Offset Gain Offset Offset Gain Offset Offset Gain 2500 2500 2500 250 250 250 25 25 25 7.5 7.5 7.5 2.5 2.5 2.5 Integration 60-Hz Rejection 60-Hz Rejection 60-Hz Rejection 60-Hz Rejection 60-Hz Rejection 60-Hz Rejection 60-Hz Rejection 60-Hz Rejection 60-Hz Rejection 60-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection 50-Hz Rejection Typical Value -0.067 mV/LSB ±5 LSB ±5 LSB -0.0067 mV/LSB ±10 LSB ±10 LSB -0.002 mV/LSB ±20 LSB ±20 LSB -0.00067 mV/LSB ±5 LSB ±5 LSB -0.67 mV/LSB ±5 LSB ±5 LSB -0.34 mV/LSB ±5 LSB ±5 LSB -0.067 mV/LSB ±5 LSB ±5 LSB -0.0067 mV/LSB ±10 LSB ±10 LSB -0.002 mV/LSB ±20 LSB ±20 LSB -0.00067 mV/LSB 8.1.2.10 Time Skew Between Measurements Time skew between consecutive voltage measurements is a function of settling and integration times, A/D conversion, and the number entered into the Reps parameter of the VoltDiff() or VoltSE() instruction. A close approximation is: Time Skew = Settling Time + Integration Time + A‐D Conversion Time1 + Reps/NoReps2 290
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