11
Phosphate Test Procedure
1
2
REMOVE STRIP
Remove one (1)
eXact
®
Strip Micro PO
4
, Part No.
486814
from the bottle before beginning the test.
Set the strip in a dry, convenient place and recap
the bottle immediately.
TURN METER ON
Press the
ZERO/ON
button to power the meter on;
the display will show all annunciators, then the
current MENU selection, followed by the last
reading.
DIP STRIP AND PRESS “READ”
Dip the
eXact
®
Strip Micro PO
4
, Part No. 486814
into
the
CELL
and immediately press
READ
. This starts the
20 SECOND
countdown timer. During this time move
the strip in a gentle back and forth motion (approx. 2
strokes/sec).
Remove and discard the strip after “1”
on the display disappears*
. The meter will
automatically start to count up for 120 seconds.
READ RESULT DISPLAYED
After the 120 seconds, the cursor will move across
the display while the meter prepares to measure the
sample. Record result displayed (this result is
automatically stored in PO8 Menu). After testing,
rinse cell immediately.
ZERO METER*
Press the
ZERO/ON
button. When the display
shows
0.00 PPM
, the sample is ready for testing.
RINSE AND FILL CELL WITH SAMPLE
Note: Clean the CELL with Distilled Vinegar (5%), 0.1
N HCl or Muriatic Acid. Rinse the CELL at least 3
times with the water sample you will be testing -
rinsing minimizes the potential for cross-contamination
IURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWRFDSDFLW\ZLWKWKH
water sample.
SELECT TEST: PO8
Press and re-press the
MENU
button until the
display shows the parameter
PO8
.
pO
4
PO8
7
5
3
6
*
NOTE: When testing outdoors (sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing and Reading the sample.
NOTE: Reactive Phosphate reacts with Molybdenum in acid media to form a phosphomolybdate complex. This complex will reduce in
the presence of ascorbic acid to form an intense blue color.
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