Campbell SR20-T2, Руководство по эксплуатации продукта

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6. Verify mounting hardware is firmly tightened, and that the mounting bracket is at the
desired angle.
5. Wiring
Table 5-1 (p. 7) provides the 2-wire half bridge wiring and Table 5-2 (p. 8) provides the 4-wire
half bridge wiring. FIGURE 5-1 (p. 10) provides the schematic for the 2-wire configuration of the
integrated thermistor and FIGURE 5-2 (p. 10) provides the schematic for the 4-wire configuration
of the integrated thermistor.
Table 5-1: Pin-out, wire color, function, and data logger connection for 2-wire half bridge
Wire
color
Pin out
Function
Data logger connection
-PT -PW
Differential Single-ended
White 7 7
Pyranometer
signal high
U configured for
differential input
1
, DIFF H
(differential high, analog-
voltage input)
U configured for single-
ended analog input
1
, SE
(single-ended, analog-
voltage input)
Green 5 9
Pyranometer
signal reference
U configured for
differential input
1
,
DIFF L (differential low,
analog-voltage input)
⏚ (analog ground)
Brown 4 4
Heater (polarity
does not matter,
1.5 W at 12 VDC)
Switched heater power:
SW, SW12, SW12V,
SW Battery (switched 12 V)
Constant heater power:
12V
Switched heater power:
SW, SW12, SW12V,
SW Battery (switched 12 V)
Constant heater power:
12V
Yellow 1 1 Heater ground G G
Red 2 2 Thermistor signal
U configured for single-
ended analog input
1
, SE
(single-ended, analog-
voltage input)
U configured for single-
ended analog input
1
, SE
(single-ended, analog-
voltage input)
Blue 6 6
Thermistor
reference
⏚ (analog ground) ⏚ (analog ground)
SR20-T2 ISO Spectrally Flat Class A (Secondary Standard) Pyranometer 7