Campbell Scientific ASPTC Aspirated Thermocouple - Manual (Page 6)

Model ASPTC Aspirated Shield with Fine Wire Thermocouple
1.2 Power Considerations
The ASPTC should be powered by an external 12 VDC deep cycle, battery
with an SP20R solar panel or the PS100 with the AC charger. A PS100 with a
solar panel will not have enough reserve power for overcast days.
2. Mounting
The ASPTC can be mounted on the Campbell Scientific's Bowen Ratio arms
(see Figure 2-1) or UT018 crossarm (see Figure 2-2).
When using the Bowen Ratio arms to mount the ASPTC, mount it to the side
of the arm such that the ASPTC intake is at the same height as the water vapor
intake.
The ASPTC may also be mounted on a user supplied crossarm with a square
cross section (1.5 in. x 1.5 in.).
FIGURE 2-1. ASPTCs Mounted to Bowen Ratio Arms
FIGURE 2-2. ASPTC Mounted to the UT018
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