Checking The Concentration Of The Naclo Solution; Required Material; Fitting The Dispenser Tip To The Handystep S Titrator; General Instructions - Grundfos 98842487 Operating Instructions Manual

3. Checking the concentration of the
NaClO solution
The HandyStep S titrator enables accurate titrimetric
analysis in the field, using small quantities of sample
and reagent consumables.

3.1 Required material

• HandyStep S titrator
• Dispenser tip
• Syringe, 6 ml
• Test jar, crystal clear, 60 ml
• Neutral tube, 5 ml
• Stirring rod
• Titrant: 30 ml of 2N sodium thiosulphate solution
(Na S O )
2 2 3
• Chlorine HR tablets
• Acidifying GP tablets
• Softened water (from soft-water sample valve ot
the Selcoperm system)
HandyStep S titrator
2
3
4
Fig. 2 HandyStep S titrator
Pos. Description
1 Stroke setting wheel (slow/rapid dispense)
2 Dispensing lever
3 Titration scale (units dispensed)
4 Locking/filling lever
5 Syringe ejector
1
5
3.2 Fitting the dispenser tip to the
HandyStep S titrator
A B
Fig. 3 Fitting the dispenser tip to the titrator
1. Hold the HandyStep S titrator (fig. 1, Pos. 2)
vertically (titrating position). Push the
locking/filling lever (fig. 2, Pos. 4) to its lower stop
(A).
2. Push the locking/filling lever down gently until it
inclines (B).
– The locking bar inside the titrator opens.
3. Insert the top of the dispenser tip (fig. 1, Pos. 4)
into the titrator. Pull the locking/filling lever back
into its starting position (C).
– The locking bar inside the titrator closes.
The dispenser tip is now held firmly inside the titrator
ready to use.
C
5