Campbell Scientific CR3000 Micrologger - Manual (Page 299)

Section 8. Operation
299
Table 62. Calibrate() Instruction Results
Descriptions of Array Elements
Array
Cal()
Element
Differential (Diff)
Single-Ended (SE) Offset or Gain
±mV Input
Range Integration Typical Value
24 Gain 200 60-Hz Rejection -0.00667 mV/LSB
25 SE Offset 50 60-Hz Rejection ±30 LSB
26 Diff Offset 50 60-Hz Rejection ±30 LSB
27 Gain 50 60-Hz Rejection -0.00167 mV/LSB
28 SE Offset 20 60-Hz Rejection ±35 LSB
29 Diff Offset 20 60-Hz Rejection ±35 LSB
30 Gain 20 60-Hz Rejection -0.00067 mV/LSB
31 SE Offset 5000 50-Hz Rejection ±25 LSB
32 Diff Offset 5000 50-Hz Rejection ±25 LSB
33 Gain 5000 50-Hz Rejection -0.167 mV/LSB
34 SE Offset 1000 50-Hz Rejection ±25 LSB
35 Diff Offset 1000 50-Hz Rejection ±25 LSB
36 Gain 1000 50-Hz Rejection -0.0333 mV/LSB
37 SE Offset 200 50-Hz Rejection ±30 LSB
38 Diff Offset 200 50-Hz Rejection ±30 LSB
39 Gain 200 50-Hz Rejection -0.00667 mV/LSB
40 SE Offset 50 50-Hz Rejection ±30 LSB
41 Diff Offset 50 50-Hz Rejection ±30 LSB
42 Gain 50 50-Hz Rejection -0.00167 mV/LSB
43 SE Offset 20 50-Hz Rejection ±35 LSB
44 Diff Offset 20 50-Hz Rejection ±35 LSB
45 Gain 20 50-Hz Rejection -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 Time 1 +
Reps/NoReps 2
1 A/D (analog-to-digital) conversion time = 125 µs
2
Reps/No Reps -- If Reps > 1 (i.e., multiple measurements by a single instruction), no additional time
is required. If Reps = 1 in consecutive voltage instructions, add 15 µs per instruction.