Campbell PC208 Instruction Manual download pdf (Page 16)

this is the downstream probe (unmarked)

e.g. the highest probe in the stem or

the

root probe nearest to the stem

this is the heater probe

this is the upstream probe (marked with a dot)

Sap flow

4.2.3. Carefully drill the holes using a high-speed, electric drill.

•

Don’t drill too far at once (say more than 20mm) because this can

'over-bore' the hole. Make sure the hole is about 20 mm deeper than

the longest probe.

•

Remove the jig and 'plug’ the holes with Vaseline.

•

Take a 'cork bore' around the two outer holes so you can measure

the bark depth, D (mm),

e.g.

with a set of calipers.

insert:

•

Dip each probe in Vaseline, and then insert it CAREFULLY into

the appropriate hole. The probe marked with the red dot goes

closest to the heater. Insert the heater last.

•

Tape the probes CAREFULLY to the tree stem, but don’t bend

them to far!!

•

Check each probe to make sure its OK (see 4.1)

IF its OK THEN

•

connect it to the logger.

ELSE

•

get some new probes

•

goto insert

ENDIF

4.3. Testing if everything is working.

Make sure the HPV system is properly connected (see 3.2 above)

Make sure the logger is properly programmed (see 5 below)

Fire a test pulse (see 5 below)

IF it seems to be OK THEN

go for a beer

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Campbell PC208 Instruction Manual Page 16

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