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Instruction Manual
HI 3840
Hardness
Low Range
Test Kit
www.hannainst.com
Dear Customer,
Thank you for choosing a Hanna Product.
Please read the instructions carefully before using the
chemical test kit. It will provide you with the necessary
information for a correct use of the kit.
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 3840-0 Hardness LR Reagent, 1 bottle with
dropper (30 mL);
• 1 calibrated plastic vessel (50 mL).
Note: Any damaged or defective item must be returned in
its original packing materials.
SPECIFICATIONS
Range
0 to 150 mg/L (ppm) CaCO
Smallest Increment
5 mg/L (ppm) CaCO
3
Analysis Method
Drop count titration
Sample Size
50 mL
Number of Tests
50 (average)
Case Dimensions
115x105x80 mm (4.5x4.1x3.1")
Shipping Weight
120 g (4.2 oz.)
SIGNIFICANCE AND USE
Historically, water hardness had been defined by the
capacity of water to precipitate soap. The ionic species in
water causing the precipitation were later found to be
primarily calcium and magnesium. Currently, therefore,
water hardness is actually a quantitative measure of these
ions in the water sample.
CHEMICAL REACTION
T
The Hanna Test Kit determines total hardness in water via
a titrimetric method. Calcium and magnesium form a
complex with EDTA and the reaction end-point is indicated
by the change in color of the indicator from red to blue.
INSTRUCTIONS
READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT
• Rinse the plastic vessel with the water sample, and fill
it to the 50 mL mark with the sample.
• Add drops of HI 3840-0 reagent until the color changes
from pink to blue, while swirling the sample after each
3
drop and counting the drops needed to obtain the
color change.
• Use the Conversion Table or calculate the Hardness:
# of DROPS
5 = ppm CaCO
*
1 ppm=1 mg/L=0.1
f=0.0556
°
NOTE:
ppm : is milligrams CaCO
°f
: French Degrees
°D
: German Degrees
°E
: English Degrees
Store the reagent bottle out of direct sunlight
REFERENCES
Adaptation of the E.P.A. recommended 130.2 method.
HEALTH AND SAFETY
The chemicals contained in this test kit are safe in normal
domestic term. Read Health and Safety Data Sheet before
performing the test.
TABLE 1
HARDNESS OF WATER
Drops:
1 - 16
very soft
17 - 32
soft
33
medium
To measure: Hardness Medium Range use HI 3841 Test Kit
Hardness High Range use HI 3842 Test Kit
TABLE 2
CONVERSION DATA
D
o r
s p
p p
m
1
5
2
1
0
3
1
5
4
2
0
5
2
5
6
3
0
3
D=0.07
E
°
°
7
3
5
8
4
0
per Liter
3
9
4
5
1
0
5
0
1
1
5
5
1
2
6
0
1
3
6
5
1
4
7
0
1
5
7
5
1
6
8
0
1
7
8
5
1
8
9
0
1
9
9
5
2
0
1
0
0
2
1
1
0
5
2
2
1
1
0
2
3
1
1
5
2
4
1
2
0
2
5
1
2
5
2
6
1
3
0
2
7
1
3
5
2
8
1
4
0
2
9
1
4
5
3
0
1
5
0
f °
D °
E °
0
5 .
0
2 .
8
0
3 .
5
1
0 .
0
5 .
6
0
7 .
0
1
5 .
0
8 .
3
1
0 .
5
2
0 .
1
1 .
1
1
4 .
0
2
5 .
1
3 .
9
1
7 .
5
3
0 .
1
6 .
7
2
1 .
0
3
5 .
1
9 .
4
2
4 .
5
4
0 .
2
2 .
2
2
8 .
0
4
5 .
2
5 .
0
3
1 .
5
5
0 .
2
7 .
8
3
5 .
0
5
5 .
3
0 .
6
3
8 .
5
6
0 .
3
3 .
3
4
2 .
0
6
5 .
3
6 .
1
4
5 .
5
7
0 .
3
8 .
9
4
9 .
0
7
5 .
4
1 .
7
5
2 .
5
8
0 .
4
4 .
4
5
6 .
0
8
5 .
4
7 .
2
5
9 .
5
9
0 .
5
0 .
0
6
3 .
0
9
5 .
5
2 .
8
6
6 .
5
1
0
0 .
5
5 .
6
7
0 .
0
1
0
5 .
5
8 .
3
7
3 .
5
1
1
0 .
6
1 .
1
7
7 .
0
1
1
5 .
6
3 .
9
8
0 .
5
1
2
0 .
6
6 .
7
8
4 .
0
1
2
5 .
6
9 .
4
8
7 .
5
1
3
0 .
7
2 .
2
9
1 .
0
1
3
5 .
7
5 .
0
9
4 .
5
1
4
0 .
7
7 .
8
9
8 .
0
1
4
5 .
8
0 .
6
1
0
1 .
5
1
5
0 .
8
3 .
3
1
0
5 .
0
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Summary of Contents for Hanna Instruments HI 3840
- Page 1 TABLE 2 Instruction Manual SPECIFICATIONS CONVERSION DATA f ° D ° E ° Range 0 to 150 mg/L (ppm) CaCO Smallest Increment 5 mg/L (ppm) CaCO HI 3840 Analysis Method Drop count titration Sample Size 50 mL drop and counting the drops needed to obtain the Hardness color change.