4
DPD-1 Free Chlorine Test Procedure
1
6a
6b
5
2a
3
4
DO NOT
discard the sample from the Free Chlorine test,
if you are planning to run eXact
®
Strip Micro DPD-3 (Total
Chlorine) Procedure, Continue steps 7-9 on page 5.
Otherwise, rinse the cell immediately.
2b
CL1: Chlorine reacts with N,N-diethyl-p-phenylenediamine
as it is released from the strip to form a magenta color,
directly proportional to the Chlorine concentration. (Ozone,
Total Chlorine, and Permanganate are also determined in
the CL1 MENU)
Remove one (1)
eXact
®
Strip Micro CL (DPD-1)
, part
number 486637, from the bottle before beginning the
test. Set the strip in a dry, convenient place and recap
the bottle immediately.
REMOVE STRIP
1
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.
TURN METER ON
2
Dip the
eXact
®
Strip Micro CL (DPD-1), Part No.
486637
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.
Remove and discard the strip when the time
displays 1
. The cursor will move across the display,
informing you that it is about to measure the sample.
Record result displayed (this result is automatically
stored in CL1).
DIP STRIP AND PRESS “READ”
6
Press the
ZERO/ON
button. The cursor will move
across the display followed by
0.00 PPM
. Sample is
ready for testing.
ZERO METER
5
Rinse the
CELL
at least 3 times with the water sample
you will be testing - rinsing minimizes the potential for
cross-contamination from a previous test. Finally, fill
cell to capacity (4ml) with the water sample.
FILL METER WITH SAMPLE
4
Press and re-press the
MENU
button until the
display shows the parameter you want to run.
CL1
is also used for testing:
Total Chlorine (DPD-4), Ozone (DPD-4), Permanganate (DPD-1), and
Total Chlorine (DPD-3). (Contact ITS for specs and details if you are
planning on using
CL1
for Permanganate or Ozone measurements)
SELECT TEST: CL1
3
CL
CL1
29
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
Become familiar with the meter and the different tests by reading the instructions carefully.
The DPD-1 & DPD-4 strips supply enough reagent for accurate results at room temperature. If
samples are below 60°F (15°C) the 20 second strip dip time will give low results for chlorine
values above 4 ppm. For cold samples, best results are obtained when a 40 second dip time is
used (Dip one strip for two (2) twenty second periods).
The Free Chlorine and Total Chlorine results are compliant for meeting USEPA (4500-Cl G); ISO
7393/2; and German DIN 38408 G4-2 requirements.
Observe the dip time (
as required for the test
) for accurate results.
Test immediately after filling the
CELL
with water sample when testing for an oxidizer such as
Chlorine, Bromine, Ozone, etc...
Be sure the
CELL
is filled to capacity (4ml), especially for pH and Total Alkalinity.
Sample water that may splash out of the
CELL
during movement of the eXact
®
Strip Micro will not
affect accuracy, as long as the cell is 50% full at end of test.
Rinse the
CELL
with clean water immediately after completing the test.
(Some test reagents will
stain or coat the CELL)
Just before testing, rinse the sample
CELL
with the sample water several times to get a
representative sample. (
Use deionized or distilled water for rinsing if you have a limited amount of
sample
).
Store the meter and all test materials out of direct sunlight and away from chemical storage areas.
Minimize exposure of meter and test reagents to heat above 100°F (38°C).
Dry the outside of the meter when testing is complete or before storage of the meter.
When running a DPD-1 Free Chlorine test
AFTER
a Total Chlorine DPD-3 or DPD-4 test, rinsing is
very important to remove residual KI, which may interfere.
Each eXact
®
Strip Micro is valid for
ONLY
one test. Discard strip after single use in regular trash
that is inaccessible to children and pets.
Each bottle of eXact
®
Strip Micro contains the quantity of strips notated on the bottle. Due the
manufacturing process, you may find one or two strips that are noticeably smaller or larger in
width than the normal strips in the bottle. These should be discarded. Using these strips may give
unreliable results.
Each conversion table supplied has a unique revision number located in the bottom right corner of
the chart. It is recommended that you visit www.sensafe.com at least every 6 months to check for
any updated revisions.
Tests are calibrated at 75°F +/- 2°F (24°C +/- 1°C). If water sample is 60°F (15°C) or cooler, most
tests like Copper, Manganese, Nitrate, and Nitrite may require additional time for full chemical
development. At the end of the normal test procedure, press
READ
again and compare value after
this countdown. If the new value is higher, then use the new value for your result. It is
recommended that the water sample be warmed to room temperature before testing.
The eXact
®
Micro 7+ Meter is not compatible for use with DPD-1, DPD-3, and DPD-4 powder
pillows, tablets, and liquids available from other manufacturers. Accurate results can only be
guaranteed by using genuine eXact
®
Micro strips or reagents (reorder information on page 31).
Normally the mixing cap is used for tests like Cyanuric Acid, Fluoride, Iron, and Manganese. A
stirrer (such as a clean, plastic coffee stirrer) may also be used in place of the mixing cap by using
the stirrer with gentle, back and forth motion, during the 20-second countdown timing.
Our lab testing with the Micro 7+ meter has shown that zeroing and measuring of the sample does
not require any cell cover for accurate results, even in full sunlight.
Remove batteries when meter is not used for more than a month.
Pool and Spa samples should be taken 18 inches below the surface as follows; submerge meter
with open cell facing down 18 inches, and then turn meter upright to fill cell. Remove meter from
water with the sample for testing.
eXact
®
Micro 7+ Tips For Best Accuracy
