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Hanna Instruments hi 3840 ユーザーズマニュアル

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Instruction Manual
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.
 
HI 3840
Hardness
Low Range
Test Kit
ISTR3840R2      10/02-L     PRINTED IN ITALY
 Range
0 to 150 mg/L (ppm) CaCO
3
 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.)
SPECIFICATIONS
SIGNIFICANCE AND USE
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
The chemicals contained in this test kit are safe in normal
domestic term. Read Health and Safety Data Sheet before
performing the test.
HEALTH AND SAFETY
REFERENCES
Adaptation of the E.P.A. recommended 130.2 method.
drop and counting the drops needed to obtain the
color change.
• Use the Conversion Table or calculate the Hardness:
    
# of DROPS 
* 
5
 
= ppm CaCO
3
 1 ppm=1 mg/L=0.1
°
f=0.0556
°
D=0.07
°
E
TABLE 1
HARDNESS OF WATER
Drops:
1 - 16
very soft
17 - 32
soft
 33
medium
NOTE: 
ppm  : is milligrams CaCO
3
 per Liter
°f
: French Degrees
°D
: German Degrees
°E
: English Degrees
To measure: Hardness Medium Range use HI 3841 Test Kit
Hardness High Range use HI 3842 Test Kit
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.
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
www.hannainst.com
Store the reagent bottle out of direct sunlight
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1
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2
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1
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2
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3
1
2
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5
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TABLE 2
CONVERSION DATA