Hanna Instruments HI 3841 Instruction Manual

Instruction Manual
HI 3841
Hardness
Medium Range
Test Kit
w w w . h a n n a i n s t . c o m
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 dam-
age, notify your Dealer or the nearest Hanna office
immediately.
Each kit is supplied with:
• HI 3841-0 Hardness MR Reagent, 1 bottle (30 mL)
with dropper;
• 1 calibrated plastic vessel (50 mL).
Note: Any damaged or defective item must be returned in
its original packing materials.

SPECIFICATIONS

SPECIFICATIONS
SPECIFICATIONS SPECIFICATIONS SPECIFICATIONS
Range 40 to 500 mg/L (ppm) CaCO
Smallest Increment 20 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

SIGNIFICANCE AND USE SIGNIFICANCE AND USE
SIGNIFICANCE AND USE 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

CHEMICAL REACTION
CHEMICAL REACTION CHEMICAL REACTION CHEMICAL REACTION
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

INSTRUCTIONS INSTRUCTIONS
INSTRUCTIONS INSTRUCTIONS
READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT
• Remove the cap from the plastic vessel. Rinse the plastic
vessel with the water sample, and fill it to the 50 mL
mark with the sample.
• Before start adding reagent, check carefully that the
dropper tip is clean. If not, clean it with a soft tissue
before use it.
• Add drops of HI 3841-0 reagent until the color changes
to pink and then to blue (titration end point), while
swirling the sample after each drop and counting the
drops needed to reach the end point.
Note: To dose the right drops volume squeeze gently
the reagent bottle.
3
• Use the Conversion Table or calculate the Hardness:
# of DROPS 20 = ppm CaCO
*
1 ppm=1 mg/L=0.1 f=0.0556 D=0.07 E
NOTE: NOTE: NOTE: NOTE: NOTE:
ppm : is milligrams CaCO
f : French Degrees
D : German Degrees
E : English Degrees
Store the reagent bottle out of direct sunlight

REFERENCES

REFERENCES REFERENCES REFERENCES REFERENCES
Adaptation of the E.P.A. recommended 130.2 method.

HEALTH AND SAFETY

HEALTH AND SAFETY HEALTH AND SAFETY
HEALTH AND SAFETY 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 TABLE 1 TABLE 1 TABLE 1 TABLE 1

HARDNESS OF WATER

HARDNESS OF WATER HARDNESS OF WATER HARDNESS OF WATER HARDNESS OF WATER
Drops:
1 - 4 very soft
5 - 8 soft
9 - 12 medium
13 - 16 hard
17 very hard
To measure: Hardness Low Range use HI 3840 Test Kit
Hardness High Range use HI 3842 Test Kit
TABLE 2 TABLE 2 TABLE 2 TABLE 2 TABLE 2

CONVERSION DATA

CONVERSION DATA
CONVERSION DATA CONVERSION DATA CONVERSION DATA
3
per Liter
3