3.3 Calculate the concentration of the sample
Digits necessary × Digit multiplier = Sample concentration
Where:
Digits necessary—The number shown in the digital counter window
Digit multiplier—The number from the table in the method (titration procedure),
which is based on the sample dilution and titrant strength.
3.4 Calculate the titrant volume used
Titrant volume used in mL = Digits necessary ÷ 800
Note: Many of the titration cartridges are made so that the number of digits used
in a titration is the same as the sample concentration in mg/L.
3.5 Prepare for storage
Prepare the digital titrator for storage as follows:
1. Push in the plunger release button and move the button backward to fully
retract the plunger.
2. Remove the cartridge.
3. Remove the delivery tube from the cartridge.
4. Seal the cartridge with the polyethylene cap.
5. Discard or clean the delivery tube immediately after use. Push water, then air
into the delivery tube opening with a syringe or wash bottle.
Section 4 Select the hardness procedure
Refer to Figure 5 to select the correct hardness procedure to use.
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