Camlab Lovibond MD 610, Instruction Manual

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MD 610_2d 11/2019
2.6.4 Calibration
Calcium Hardness Method 191 –
Calibration of a method blank
Press[MODE], [Shift] + [4] [0] keys.
Confirm with [ ] key.
The display shows:
Press[Shift] + [1] keys.
The display shows:
1. Fill a clean vial (24 mm Ø) with exactly 10 ml of deion-
ised water, closetightly with the cap.
2. Placethe vial in the sample chamber making sure that
the
marks are aligned.
3. Press ZERO key.
4. Removethe vial from the sample chamber.
5. Pipette100 ml of water free of calciumto an appropriate
beaker (note 2, 3).
6. Add 10 CALCIOH No. 1 tablets straight from the foil
to the 100 ml of water, crush the tablets using a clean
stirring rod and dissolve the tablets completely.
7. Add 10 CALCIO H No. 2 tablets straight from the
foil to the same water, crush the tablets using a clean
stirring rod and dissolve the tablets completely.
8. Press[ ] key.
Wait for a reaction period of 2 minutes .
<Calibration>
M191 Ca-hardness2T
prepare Zero
press ZERO
<Calibration>
1: M 191 Ca-hardness 2
2: M 191 reset 0 cali.
3: M 170 Fluoride L
Zero accepted
countdown
2:00
Start:
Mode
0 4
Zero
1
Shift