Voltage Excitation - Specifications; Current Measurements - Specifications; Pulse Measurements - Specifications; Switch-Closure Input - Campbell CR300 Series Operator's Manual

Ratiometric Accuracy
1 Assumes input reversal for differential measurements.
Does not include bridge resistor errors and sensor measurement noise.
2
Ratiometric accuracy, rather than absolute accuracy, determines overall measurement
3
accuracy of ratiometric resistance measurements.
7.3 Voltage Excitation – Specifications
Two terminals configured for voltage excitation using 12-bit D-to-A converter.
When used for ratiometric-resistance measurement, excitation is active only
during measurement.
Terminals:
Range:
Resolution:
Maximum Source
or Sink Current:
7.4 Current Measurements – Specifications
Two independent analog inputs may be configured as independent, non-
isolated 0-20 mA or 4-to-20 mA current-loop inputs. One channel at a time is
measured in numeric succession. Current is measured using a 24-bit A-to-D
converter.
Terminals:
Range:
Accuracy
7.5 Pulse Measurements – Specifications

7.5.1 Switch-Closure Input

Terminals:
Minimum Switch-Closed Time:
Minimum Switch-Open Time:
Maximum Bounce Time:
Maximum Input Frequency:
Maximum Input Voltage:
1 Requires an external 100 kΩ resistor connected from the terminal to BAT+.
1,2,3
0 to 40 °C:
±(0.05% of voltage measurement + offset)
–40 to 70 °C:
±(0.06% of voltage measurement+ offset)
VX1-VX2
150 to 5000 mV
4.5 mV
50 mA total, concurrently or independently
SE terminals 1-2
0 to 25 mA
0 to 40 °C: ±0.14% of reading
–40 to 70 °C: ±0.26% of reading
CR300-Series Datalogger
P_SW
C1-C2 1
3 ms
3 ms
1 ms open without being counted
150 Hz
±17 Vdc
45