Product Manual

2
Checking In Shipments
Shipments should be unpacked carefully and checked in immediately upon arrival. Do not remove the
plastic tip covering until preparing for installation.
Instruments are shipped dry and must be prepared for installation according to the instructions given
below.
Preparing IRROMETERS for
Installation
When instruments are received, it is necessary to prepare them for
installation as outlined in steps 1 through 6 below.
1
Take the plastic wrappers off the tips and fill IRROMETERS
with clean water.
Do not handle the ceramic tip. Leave the
instrument cap OFF and place the tip of the IRROMETER in clean
water overnight (use clean non-rusting glass jar, plastic bucket or
basin). Water in the instrument will drain through the tip and this
operation may be repeated as often as time permits. After soaking
and you are ready to install, protect the tip from air drying with wet
paper towels, the plastic tip bag or insert into a bucket of wet sand
while transporting to the installation site.
2
Prepare IRROMETER Field Solution as directed on the bottle
label — (a scant capful of concentrated IRROMETER Fluid to
one gallon of clean, de-aired water, such as distilled, rainwater, boiled
water that has cooled or tap water that has been allowed to sit).
3
Remove the filler cap and fill the instrument, including
reservoir, with IRROMETER Field
Solution or distilled water. If the tube does
not completely fill, it may be due to an “air
lock” which has formed at the tube filler
hole at the bottom of the reservoir. Tap
the top of the reservoir with the palm of
your hand to break this “air lock” and
facilitate complete filling of the tube.
See
picture.
Using a plastic squeeze bottle
makes filling easier as you can aim the
flow of water into the body tube of the
instrument.
See picture.
40
Apply a strong vacuum to the
IRROMETER with the hand
vacuum pump. With the filler cap
removed and the tip submerged in water or the bucket of wet sand, place
the suction cup over the reservoir and pump vigorously until a reading of 80-
85 shows on the gauge, usually 5 or 6 quick pulls.
(See page 9 -- Hand
Vacuum Pump.
) At higher elevations, maximum vacuum will be lower (i.e.
70-75 at 4000' above sea level). Release the vacuum slowly
, using the
finger release valve on the suction cup, to avoid gauge damage. Repeat the
above procedure to remove all air from the gauge, usually 2-3 times is
sufficient. Replace filler cap by tightening until the neoprene stopper makes
Soaking Tips
Filling Instrument
Breaking the air lock
Filling Instrument