Section 3. ET Instrumentation Installation
3.1Enclosure, Datalogger, Power Supply
3.1.1Battery Option Installation
a)Alkaline Option: The BPALK houses 8 "D" cell batteries. Install it as shown in Figure 3.1-1. Remove the external circuit board with wire and connector by loosening the 2 Phillips head screws. Discard the external circuit board. Mount the BPALK into the enclosure. To install the battery pack, loosen the thumbscrew and remove the cover. Insert the battery pack and plug the battery lead into the connector labeled "ALK".
Logan, Utah
INTERNAL BATTERY 
BPALK 12V ALKALINE BATTERY PACK TEMPORARY BATTERY
MADE IN USA
ALK Battery
Connection
FIGURE 3.1-1. Alkaline Power Mounting and Connections
Solar Panel or 16 VAC
Power Cable
YUASA
LA Battery Connection
FIGURE 3.1-2. Rechargeable Power Mounting and Connections
b)Sealed Rechargeable Battery Option: Install the kit as shown in Figure
3.1-2. An unregulated solar panel or 17 to 24 VAC must be used with the rechargeable battery at all times. In either case, power is routed through the Heyco fitting on the enclosure back and connected to the CHG ports by depressing connector levers. Polarity of the CHG connection does not matter. Install the rechargeable battery and plug the battery lead into the connector labeled “LA”.
