Campbell Scientific CR3000 CR3000 Micrologger - Page 85
Table 4., Alkaline Battery Service and Temperatures, CHARGING INPUT
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Section 7. Installation 8. Check for normal datalogging function before leaving the site. Table 4. Alkaline Battery Service and Temperatures Temperature (°C) % of 20°C Service* 20 - 50 100 15 98 10 94 5 90 0 86 -10 70 -20 50 -30 30 *Data based on one "D" cell under conditions of 50-mA current drain with a 30-ohm load. As the current drain decreases, the percent service improves for a given temperature. Figure 30: Alkaline battery orientation 7.4.3.2.2 Sealed Rechargeable-Battery Base A CR3000 with a rechargeable base option (see the appendix Battery Bases (p. 567) ) has an integrated power supply that utilizes two 6-Vdc, 7-Ahr, sealedrechargeable lead-acid batteries, an ac-to-ac transformer (18-V RMS-ac output), and a temperature compensated charging circuit with a charge-indicating LED. An ac transformer or solar panel should be connected to the base at all times through the green CHARGING INPUT connector located on the side of the base. 85
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