Troubleshooting
Problems
When getting problems from a probe or sensor always try to
identify which part of the measurement system is the source of
the difficulty. For the
Profile Probe
this may fall into one of the
following areas:
The measurement device
What equipment is being used to read the probe output?
•
A Delta-T HH2 Moisture Meter
•
A Delta-T DL6 logger
•
A Delta-T DL2e logger
Consult the user manuals or the on-line help for these devices,
and their related software.
Try alternative types of equipment if you have them available.
Check that the soil calibration being used is appropriate for your
soil, and that the correct conversion method is being used – see
Calibration
section.
The probe itself
Try to isolate the problem into one of the following areas
•
The Probe or the connecting cable
Then try to narrow down the area further
•
Mechanical problems faults, or damage
•
Electrical or electronic problems or faults
Calibration check
We recommend that you check the calibration of your PR2 at
least once a year by taking an air reading and a water reading as
follows:
Air reading
Keep the PR2 in its protection tube and hold it away from any
other objects. Take a reading using an HH2 meter, or other
meter or logger. The reading should be 75 ±20mV.
24
z
Troubleshooting
Profile Probe User Manual
3.0a
