HANNA instruments HI 38019 Total Chlorine Total Chlorine Tester Instruction Manual

Instruction Manual
SPECIFICATIONS
Range
HI 38019
Total Chlorine
Low and Medium
Range
Test Kit with
Checker Disc
Smallest Increment
Analysis Method
Sample Size
Number of Tests
Case Dimensions
Shipping Weight
0 to 0.7 mg/L (ppm) as Chlorine (LR)
0 to 3.5 mg/L (ppm) as Chlorine (MR)
LR: 0.02 mg/L
MR: 0.1 mg/L
Colorimetric
10 mL (LR), 5 mL (MR)
200
235x175x115 mm (9.2x6.9x4.5")
678 g (23.9 oz.)
SIGNIFICANCE AND USE
Note: Any damaged or defective item must be returned in
its original packing materials.
02/00
ISTR38019
Dear Customer,
Thank you for choosing a Hanna Product.
Please read the instruction sheet carefully before using the
test kit. It will provide you with the necessary information
for correct use of the kit. If you need additional information,
do not hesitate to e-mail us at [email protected].
Remove the chemical test kit from the packing material and
examine it carefully to make sure that no damage has
occurred during shipping. If there is any noticeable damage, notify your Dealer or the nearest Hanna office
immediately.
Each kit is supplied with:
• HI 93711-0 Total Chlorine Reagent, packets (200 pcs);
• Demineralizer Bottle with filter cap for about 12 liters
of deionized water (depending on the hardness level
of water to be treated);
• 1 checker disc (containing a mirror, a mirror holder
and the disc);
• 2 glass vials with caps;
• 1 plastic pipette (3 mL).
PRINTED IN ITALY
www.hannainst.com
Chlorine is the most commonly used water disinfectant in
applications that vary from treatment of drinking water
and wastewater, pool and spa sanitization, to food processing and sterilization. Chlorine present in water binds with
bacteria, leaving only a part of the original quantity (free
chlorine) to continue its disinfecting action. If the free
chlorine level is improper with respect to pH, water will have
an unpleasant taste and odor and the disinfecting potential of the chlorine will be diminished.
Free chlorine reacts with ammonium ions and organic
compounds to form chlorine compounds resulting in diminished disinfecting capabilities compared with free chlorine.
Chlorine compounds together with chloramines form combined chlorine. Combined chlorine and free chlorine together
result in total chlorine.
While free chlorine has a much higher disinfectant potential,
combined chlorine has a much higher stability and has a
lesser volatility.
Note: mg/L is equivalent to ppm (parts per million).
CHEMICAL REACTION
The reaction between chlorine and the DPD reagent causes
a pink tint in the sample which is proportional to the
chlorine concentration.
INSTRUCTIONS
READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT
• To measure total chlorine in the 0-0.7 mg/L range,
verify that the mirror, its holder and the disc are preinstalled in the checker disc. If not, install them as
shown in the figure.
• Use the pipette to fill each glass
vial with 10 mL of sample (up to
the mark).
• Remove the cap
and add 1 packet
of HI 93711-0 reagent. Replace the
cap and mix.
10 mL
• Insert one of the vials into the left hand opening of the
checker disc. This is the blank.
• Remove the cap and
fill the Demineralizer
Bottle with tap water.
• Replace the cap
and shake gently for
at least 2 minutes.
The demineralized
water is now ready.
• Flip open the top of the Demineralizer Bottle cap. By
gently squeezing the bottle, add demineralized water
to the other vial up to the 20 mL mark. Replace the
cap and shake to mix.
• Wait for 2 minutes to allow reaction to
occur. This is the reacted sample.
• Remove the cap and insert the reacted sample
into the right hand opening of the checker disc.
• Hold the checker disc so
that a light source illuminates the samples from
the top.
• Keep the checker disc at a distance of 30-40 cm (1216") from the eyes to match the color. Rotate the disc
while looking at the color test windows and stop when
you find the color match. Read the value in the result
window and divide it by 5 to obtain mg/L (or ppm) of
Chlorine.
• To measure total chlorine
in the 0-3.5 mg/L range,
remove the disc, mirror
and its holder, if pre-installed. Then install just
the disc as shown here.
• Use the pipette to fill each glass vial with
5 mL of sample (up to the mark) and
insert one of them into the left hand 5 mL
opening of the checker disc. This is the
blank.
• Add to the other vial demineralized water up to the 10 mL
mark and shake to mix.
Caution: Ultraviolet radiation may cause fading of colors.
When not in use, keep the disc protected from light,
in a cool and dry place.
Interferences: bromine, iodine, fluorine, ozone, oxidized
manganese and chromium.
REFERENCES
Adaptation of the EPA recommended DPD method 330.5.
HEALTH AND SAFETY
The chemicals contained in this kit may be hazardous if
improperly handled. Read the relevant Health and Safety
Data Sheet before performing this test.
• Add 1 packet of HI
93711-0 reagent. Replace the cap and
mix.
• Wait for 2 minutes to allow reaction to occur. This is the
reacted sample.
• Remove the cap and insert the reacted sample
into the right hand opening of the checker disc.
• Hold the checker disc so
that a light source illuminates the samples from
the back of the windows.
• Keep the checker disc at a distance of 30-40 cm (1216") from the eyes to match the color. Rotate the disc
while looking at the color test windows and stop when
you find the color match. Read the value in the result
window directly in mg/L (or ppm) of Chlorine.
For best results: Perform the reading three times and take
the average value (divide by 3 the sum of the three
numbers). Intensely colored samples will make the color
matching difficult and they should be adequately treated
before performing the test. Suspended matter in large
amounts should be removed by prior filtration.