Campbell Scientific Bowen Ratio Instrumentation - Manual (Page 17)

Section 2. Station Installation
2-7
2.4 Battery Connections
Two terminal strip adapters for the battery posts (P/N 4386) are provided with
the 023A (Figure 2.4-1). These terminal strips will mount to the wing nut
battery posts on most deep cycle lead acid batteries.
FIGURE 2.4-1. Terminal Strip Adapters for Connections to Battery
The SP20R solar panel, BR relay driver, and CR23X each have a separate
power cable. Once the system is installed, these power cables are then
connected to the external battery (red to positive, black to negative). The
CR23X power cable is shipped in the 023A enclosure and must be connected
to the +12 V (red from power cable) and ground (black from power cable)
terminals on the CR23X wiring panel.
2.5 System Startup
To bring the Bowen ratio system on-line, turn on the datalogger, set the
datalogger time, download the program, and set flag 6 high to activate the
hygrometer and pump.
2.6 Routine Maintenance
Change air intake filters 1-2 weeks
Clean mirror and adjust bias 1-2 weeks
Clean thermocouples as needed
Clean Radiometer domes as needed
Filters are Teflon, 25 mm diameter with a 1 µm pore size, i.e., Nuclepore
130610 or Gelman 66154
To write an array to Final Storage, while replacing filters and cleaning
thermocouples, set flag 4 high. Set flag 4 low when maintenance is complete.
The time that the site maintenance bean and ended will be written into Final
Storage.
Before removing the filters, turn the pump/mirror off by setting flag 7 high.
Install the clean filters with the glossy, textured side down. Be sure to remove
any protective paper from the filter. Remove all debris from the fine wire