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Section 3. ET Instrumentation Installation
3-2
3.1 Enclosure, Datalogger, Power Supply
3.1.1 Battery 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".
INTERNAL BATTERY
MADE IN USA
12V ALKALINE BATTERY PACK
BPALK
Logan, U
tah
TEMPORARY BATTERY
FIGURE 3.1-1. Alkaline Power Mounting and Connections
YUASA
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”.
ALK Battery
Connection
LA Batter
y
Connectio
n
Solar Panel or 16 VAC
Power Cable