Campbell Scientific CR3000 Micrologger - Manual (Page 285)

Section 8. Operation
285
= ±2 mV
and
Offset Error = 1.5 • Differential (DF) Resolution + 1 µV
= (1.5 • 167 µV) + 1 µV
= 2515 µV = 0.252 mV
Therefore,
Error = Gain Error + Offset Error
= ±2 mV + 0.251 mV
= ±2.252 mV
In contrast, the error for a 1000-mV input under the same constraints is ±0.451
mV. Figure Voltage Measurement Accuracy
(p. 285)
illustrates the total error with
respect to voltage measurements for the ±5000-mV and ±1000-mV ranges.
Figure 90: Voltage measurement accuracy (0° to 40°C)