Campbell CS650, Руководство пользователя

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User Manual
29
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