48
WT.050.311.000.DM.IM.0119
P7
Advanced
Methods
English
0.0.0
Zero
Test
S:4.3
Acid demand to pH 4.3 with Tablet
0.1 – 4 mmol/l
Fill a clean vial (24 mm Ø) with
10 ml of the water sample
and
perform zero calibration (see “Operation").
Add
one ALKA-M-PHOTOMETER tablet
straight from the foil to
the 10 ml water sample and crush the tablet using a clean stirring rod.
Close the vial tightly with the cap and swirl gently several times until
the tablet is dissolved.
Place the vial in the sample chamber making sure that the marks
are aligned.
Press the [ZERO/TEST] key.
The method symbol flashes for approx. 3 seconds.
The result is shown in the display as Acid demand to pH 4.3
in mmol/l.
Tolerance:
± 0.2 mmol/l
Notes:
1. The terms total Alkalinity, Alkalinity-m, m-Value and Alkalinity to pH 4.3 are identical.
2. For accurate results exactly 10 ml of water sample must be taken for the test.
3. Conversion table:
Acid demand
to pH 4.3
in mmol/l
CaCO
3
Calciumcarbonate
Factor
°dH*
german Hardness
Factor
°fH*
french Hardness
Factor
°eH*
english Hardness
Factor
x Factor = Result
50
2.8
5.0
3.5
* Carbonate hardness (reference = Hydrogencarbonate-anions)
Example: 2.5 mmol/l · 2.8 = 7.0° german Hardness (°dH)
S:4.3
RESULT
Содержание WALLACE & TIERNAN P7 ADVANCED
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