12. When the value on the display
matches the concentration of the
chlorine standard, press
*
I
OK
to
select
Set
.
C a l i b r a t e
0 1 . 3 0
* S e t
1 6 : 0 2 : 1 9
0 1 / 0 4 / 0 5
Or press the
and press
*
I
OK
to
return the meter to the default
setting.
C a l i b r a t e
0 1 . 3 0
* D e f a u l t
~
1 6 : 0 2 : 1 9
0 1 / 0 4 / 0 5
13. Press
*
I
OK
to proceed to Chlorine
analysis. Press
OFF
to turn the meter
off or press
to exit to a previous
menu or make another menu
selection.
* Warning:
Reagents marked with an * are considered to be potential health hazards.
To view or print a Material Safety Data Sheet (MSDS) for these reagents see MSDS CD
or our web site. To obtain a printed copy, contact us by e-mail, phone or fax.
Note:
The meter will remember the last scanned blank reading. It is not necessary to
scan a blank each time the test is performed. To use the previous blank reading,
instead of scanning a new one, scroll to Scan Sample and proceed. For the most
accurate results, the meter should be blanked before each test and the same tube with
tube positioning ring should be used for the blank and the reacted sample.
Testing Tips
1. Wash tubes thoroughly after testing to prevent staining of tubes and
contamination of future test reactions with DPD residue.
2. When using liquid DPD reagents, invert bottle in a completely vertical position to
dispense uniform drops. Do not tilt bottle at an angle.
3. Follow instructions. Obey time limits.
4. In samples with extremely high chlorine concentrations, above 10 ppm, the
reagent system will show an initial flash of dark pink color that will fade quickly.
Dilute the sample and test again.
5. When testing salt water, double the amount of reagent used. Use ten drops of
each DPD liquid reagent or two DPD tablets.
6. Oxidized manganese (permanganate) will interfere with this test. Iodine and
bromine will give a positive interference.
7. A permanganate check standard is not recommended for calibration when using
the liquid DPD reagent system.
8. The averaging option is not available for the chlorine test.
CALIBRATION & ANALYSIS • CHLORINE
67
Summary of Contents for 1964-EPA
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