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Datalogger Sleep Mode (CR850)


BenBenBeneben Oct 10, 2019 07:36 PM

I am confused with datalogger sleep mode. If we are going to measure a water level every 30s, does this mean that the data logger wont go to sleep mode? 


JDavis Oct 11, 2019 09:11 AM

The CR850 will go to sleep automatically during any idle time. If measuring the water level sensors takes 1 second to measure, then the datalogger will be asleep 29 out of every 30 seconds.

The Status table of the CR850 has values for MeasureTime and ProcessTime. If the program compiles in sequential mode, add the two times together to know the toal scan time. If compiled in pipeline mode, those processes overlap. The time values are in microseconds.


BenBenBeneben Dec 17, 2019 07:02 PM

Good day! Thank you for your response. How about if I have a scan with 1 sec interval, does this mean my datalogger won't sleep? I need to watch a variable/flag change to trigger a sequence. I can't use digtrig since I've already used all my serial ports. Thank you


nsw Dec 20, 2019 09:15 AM

If your scan rate is 1s, then it t will go into sleep mode for some of that second. However, the specifications of the CR800 for current consumption are as follows :-

Idle Current Drain, Average          :   0.7 mA (@ 12 Vdc)

Active Current Drain, Average      :   1 mA (1 Hz sample rate @ 12 Vdc without RS-232 communication)

So, the difference is pretty small anyway.

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