eXact Micro 7+ Instruction Manual page 4

DPD-1 Free Chlorine Test Procedure
CL1
1
2a
2b
3
4
5
6
DO NOT discard the sample from the Free Chlorine test, if you are planning to run eXact
Strip Micro DPD-3 (Total Chlorine) Procedure, move directly to steps 8-10 on page 5.
Otherwise, rinse the cell immediately.
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 can also be determined in the CL1 MENU)
REMOVE STRIP
1
Remove one (1) eXact
Part No. 486637 from the bottle before beginning
the test. Set the strip in a dry, convenient place and
recap the bottle immediately.
TURN METER ON
2
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.
SELECT TEST: CL1
3
Press and re-press the MENU button until the
display shows the parameter CL1.
CL1 is also used for testing:
Total Chlorine (DPD-4), Ozone (DPD-4), Permanganate (DPD-1), and
Total Chlorine (DPD-1 + DPD-3). (Contact ITS for specs and details if you
are planning on using CL1 for Permanganate or Ozone measurements)
RINSE AND FILL CELL WITH SAMPLE
4
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.
ZERO METER
5
Press the ZERO/ON button. The cursor will move
across the display followed by 0.00 PPM. Sample is
ready for testing.
DIP STRIP AND PRESS "READ"
6
Dip the eXact
®
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 after "1" on
the display disappears.
RECORD RESULT DISPLAYED
7
The cursor will move across the display while the
meter prepares to measure the sample. Record result
displayed (this result is automatically stored in CL1).
NOTE: If your result is 3.00 ppm or greater, repeat
Step 6 by using a second DPD-1 Strip within the next
30 seconds. This assures that all chlorine has reacted
with adequate DPD reagent. Use this as your Free
Chlorine level.
4
Strip Micro CL (DPD-1),
®
Strip Micro CL (DPD-1), Part No.
CL
®