LaMotte DPD CHLORINE & pH TEST KIT LP-3 - Manual (Page 2)

PRO CE DURE
FREE AVAIL ABLE CHLO RINE (FAC)
Recommended minimum Free Available Chlorine level in pool water is
1.0 ppm in unstabilized pools; 2.0 ppm in stabilized pools. For bather
safety after superchlorination, the maximum level of Free Chlorine is 3.0
ppm.
1.
Rinse a test tube (0898) with sample water. Fill to 5 mL line with
sample water.
2. Add one *Chlorine DPD #1R Tablet (6999A). Cap and mix until
tablet disintegrates.
3. Immediately insert test tube into Chlorine DPD Comparator (6902).
Match sample color to a color standard. Record as ppm Free
Available Chlorine.
NOTE:
Do not discard this test sample if total residual chlorine is to
be determined.
TO TAL RE SID UAL CHLO RINE (TRC)
Ideally, the Total Residual Chlorine should be equal to the Free Available
Chlorine reading. Combined Chlorine should not exceed 0.2 ppm.
4.
Add one *Chlorine DPD #3R Tablet (6905A) to sample from Step 3.
Cap and mix until tablet disintegrates.
5. Insert test tube into Chlorine DPD Comparator (6902). Match
sample color to a color standard. Record as ppm Total Residual
Chlorine.
Combined Chlorine ppm =
Total Residual Chlorine _ Free Available Chlorine
pH - PHE NOL RED IN DI CA TOR
Rec om mended op ti mum pH range for pool wa ter is pH 7.2 to pH 7.6.
1.
Rinse a test tube (0898) with sample water. Fill to 10 mL line with
sample water.
2. Add one Phenol Red Tablet (6915A). Cap and gently mix until
tablet disintegrates.
3. Immediately insert test tube into the Phenol Red Comparator (2185).
Match sample color to a color standard. Record as pH units.
LaMOTTE COM PANY
Helping Peo ple Solve An a lyt i cal Challenges SM
PO Box 329 • Chestertown • Mary land • 21620 • USA
800-344-3100 • 410-778-3100 (Out side U.S.A.) • Fax 410-778-6394
Visit us on the web at www.lamotte.com
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