Campbell Scientific CR3000 CR3000 Micrologger - Page 438
Power Supplies
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Section 10. Troubleshooting queue, 14 bigfreeq packets are free (one in use), and 28 lilfreeq are free (two in use). These three pieces of information are also reported in the IP trace (p. 459) information every 30 seconds as lilfreeq, bigfreeq, and recvdq. If lilfreeq or bigfreeq free packets drop and stay near zero, or if the number in rcvdq climbs and stays high (all are rare occurrences), please contact a Campbell Scientific application engineer as the operating system may need adjustment. CommsMemFree(3) is encoded as follows: CommsMemFree(3) = lilfreeq + bigfreeq*100 + rcvdq*10000 + sendq*1000000 where, lilfreeq = number of small TCP packets available bigfreeq = number of large TCP packets rcvdq = number of input packets currently waiting to be serviced sendq = number of output packets waiting to be sent The following expressions can be used to pick the values out of the CommsMemFree(3) variable: lilfreeq = CommsMemFree(3) % 100 bigfreeq = (CommsMemFree(3) / 100) % 100 rcvdq = (CommsMemFree(3) / 10000) % 100 sendq = (CommsmemFree(3) / 1000000) % 100 10.5 Power Supplies 10.5.1 Overview Power-supply systems may include batteries, charging regulators, and a primary power source such as solar panels or ac/ac or ac/dc transformers attached to mains power. All components may need to be checked if the power supply is not functioning properly. Diagnosis and Fix Procedures (p. 439) includes the following flowcharts for diagnosing or adjusting power equipment supplied by Campbell Scientific: • Battery-voltage test • Charging-circuit test (when using an unregulated solar panel) • Charging-circuit test (when using a transformer) • Adjusting charging circuit If power supply components are working properly and the system has peripherals with high current drain, such as a satellite transmitter, verify that the power supply is designed to provide adequate power. Information on power supplies available from Campbell Scientific can be obtained at www.campbellsci.com. Basic information is available in the appendix Power Supplies (p. 566). 438