Real-Time Clock:
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Battery backed while external power is disconnected
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Resolution: 1 ms
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Accuracy: ±1 min. per month
Wiring Panel Temperature: Measured using a thermistor, located on the processor board.
NOTE:
The measurement from the PanelTemp() instruction does not accurately reflect the
temperature of the wiring panel, since it measures the temperature of the main processing
board. Therefore, if the data logger processor, or charge (CHG) input are active, the
PanelTemp() measurement will be warmer than ambient. This should be taken into
consideration if this measurement is used as a reference temperature for other
measurements such as thermocouples.
24.2 Physical specifications
Dimensions (additional clearance required for cables, wires and antennas):
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CR300: 13.97 x 7.62 x 4.56 cm (5.5 x 3.0 x 1.8 in). For CAD files, see CR300 Images and CAD
2D Drawings.
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CR310: 16.3 x 8.4 x 5.6 cm (6.4 x 3.3 x 2.2 in). For CAD files, see CR310 Images and CAD 2D
Drawings.
Weight/Mass:
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CR300: 242 g (0.53 lb)
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CR300-WIFI/RF407/RF412/RF422: 250 g (0.55 lb)
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CR310: 288 g (0.64 lb)
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CR310-WIFI/RF407/RF412/RF422: 306 g (0.68 lb)
Case Material: Powder-coated aluminum
24.3 Power requirements
Power specifications for a communications option are shown within the specifications section for
that option.
Protection: Power inputs are protected against surge, over-voltage, over-current, and reverse
power. IEC 61000-4 Class 4 level.
24. CR300 series specifications240
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