Instruction manual

CS650 and CS655 Water Content Reflectometers
9. Maintenance and Troubleshooting
The CS650 does not require periodic maintenance. TABLE 9-1 provides
troubleshooting information.
TABLE 9-1. Symptom, Cause, and Solutions
Symptom Possible Cause Solution
All CS650 output
values read 0
No SDI12Recorder
instruction in
datalogger program
Conditional statement
that triggers reading is
not evaluating as true
Add SDI12Recorder
instruction to
datalogger program
Check logic of
conditional statement
that triggers readings
First value reads NAN
and all other values
read 0* or never
change from one
measurement to
another
CS650 SDI-12 address
does not match address
specified in datalogger
program
Change probe address
or modify program so
that they match
(*or all values read
NAN if the program
examples in this
manual are followed)
CS650 green wire not
attached to SDI port
specified in datalogger
program
Connect wire to correct
control port or modify
program to match
wiring
CS650 not being
powered
Make sure red wire is
connected to 12V or
SW12V and black wire
to G.
If using SW12 to
power sensor, make
sure red wire is
connected and
datalogger program
switches SW12 on.
VWC reading is
9999999
Soil bulk permittivity is
outside probe’s
operational range
Modify program to
collect permittivity
value and try soil
specific calibration
EC reading is 9999999
Soil bulk electrical
conductivity is outside
probe’s operational
range
If using CS650, try
CS655
Readings erratic,
including NAN’s and
9999999’s
Multiple probes with
same SDI-12 address
sharing same control
port
Give probes unique
addresses or put on
separate control ports
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