NOTE:
CR300 series data loggers are not capable of applying reverse excitation. Set the RevEx
parameter of all bridge measurement instructions to False.
l
Range: 150 to 5000 mV
l
Resolution: 1.6 mV
l
Maximum Source Current: 50 mA total, concurrently or independently.
See also Voltage measurements(p. 90).
SW12V: Provides unregulated 12 VDC power with voltage equal to BAT+ input voltage. SW12V is
disabled when operating on USB power only. A thermal fuse regulates current sourcing.
l
Thermal Fuse Hold Current (Overload causes voltage drop. Disconnect and let cool to
reset. Operate at limit if the application can tolerate some fluctuation.):

o
1200 mA @ -40 °C

o
1100 mA @ 20 °C

o
830 mA @ 70 °C
See also Power output(p. 12).
24.5 Analog measurement specifications
6 single-ended (SE) or 3 differential (DIFF) terminals individually configurable for voltage,
thermocouple, current loop, ratiometric, and period average measurements, using a 24-bit ADC.
One channel at a time is measured.
24.5.1 Voltage measurements
Terminals:
l
Differential Configuration: DIFF 1H/1L – 3H/3L
l
Single-Ended Configuration: SE1 – SE6
Input Resistance:
l
5 GΩ typical (f
N1
= 50/60 Hz)
l
300 MΩ typical (f
N1
= 4000 Hz)
Input Voltage Limits: -100 to +2500 mV
24. CR300 series specifications243
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