6
FILLING: Multiple-Use Disks
When the syringe is placed in the water sample, and the plunger is
pulled all the way up, the syringe will hold more than enough water
sample to adequately fill the disk. Hold the syringe vertically and
insert the tip into the fill hole in the disk. Press the plunger slowly and
smoothly to fill the disk..
1. Fill any unused section of the disk using slow, even
pressure. Add the sample water until the Blank
Chamber is full and the Over Flow Chamber is partially
filled.
Correct Fill
Blank
Chamber
Over Flow
Chamber
2. Do not overfill the disk. If the disk is overfilled, sample
water will flow out of the vent hole in the center of the
disk. The disk is not leaking. Dry the disk and run the
test.
Overfilled
(Dry disk before placing in meter)
Blank
Chamber
Over Flow
Chamber
3. Do not under fill the disk. If the disk is under filled, the
blank chamber will not be full. The reagent chambers
will not fill entirely and results will be inaccurate.
Underfilled
Blank
Chamber
4. Do not introduce air bubbles into the disk. The reagent
chambers will not fill entirely and results will be
inaccurate. As soon as a bubble starts to form, pull
back on the plunger to draw the bubble out of the disk.
Begin the filling process again.
Air Bubble
5. Wet disks should be dried thoroughly with a lint free
wipe. Handle the disk by the edges. Between tests
store the disk on a flat surface. Do not agitate a
partially filled disk to avoid leaking and contamination.
Partially used disks should be discarded at the end of
the day.
6. Disks should be filled and used within 10 minutes. They cannot be filled ahead of
time.
FILLING
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