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Model 109SS Temperature Probe
3. Installation and Wiring
3.1 Burial
The 109SS is suitable for shallow burial only. It should be placed horizontally
at the desired depth to avoid thermal conduction from the surface to the
thermistor. Placement of the cable inside a rugged conduit may be advisable
for long cable runs, especially in locations subject to digging, mowing, traffic,
use of power tools, or lightning strikes.
3.2 Submersion
The 109SS can be submerged to 50 ft. Please note that the 109SS is not
weighted. Therefore, the installer should either add a weighting system or
secure the probe to a fixed or submerged object such as a piling.
4. Wiring
Connections to Campbell Scientific dataloggers are given in Table 4-1.
Temperature is measured with one Single-Ended input channel and a Voltage
Excitation channel. Multiple probes can be connected to the same excitation
channel (the number of probes per excitation channel is physically limited by
the number of lead wires that can be inserted into a single voltage excitation
terminal, approximately six).
TABLE 4-1. Connections to Campbell Scientific Dataloggers
Color
Description
CR200
CR800
CR850
CR3000
CR1000
CR510
CR500
CR10(X)
CR5000
21X
CR7
CR23X
Black Excitation Switched
Voltage
Excitation
Switched
Voltage
Excitation
Switched
Voltage
Excitation
Red Temperature
Signal
Single-Ended
Input
Single-Ended
Input
Single-Ended
Input
Purple Signal Ground
AG
Clear Shield
G
5. Programming
This section is for users who write their own datalogger
programs. A datalogger program to measure this sensor can be
generated using Campbell Scientific’s Short Cut Program
Builder software. You do not need to read this section to use
Short Cut.
NOTE
4