Elitech ChloroChek Chloridometer 3400 User Manual page 18

6 After the working point is reached, user will be instructed to pipette 10 µL of the 100 mmol/L NaCl/H
Standard (SS-251) into the Working Solution.
To open the standard, first ensure that the fluid is in the bottom of the ampule. Hold the One Point Cut
(OPC) ampule of SS-251 steady in one hand. With the other hand, carefully break off the head of the
ampule with only slight pressure across the printed point (blue dot) on the neck of the ampule. Use a
protective plastic sleeve when opening the ampule.
7 Place a correctly-sized pipette tip onto a 10 µL fixed-volume piston pipette. ELITech Group has an
appropriate pipette (AC-178) and pipette tips (SS-253) available.
8 Place the pipette tip well into the 100 NaCl/H
solution during the entire filling phase. Avoid drawing air into the pipette during the filling phase. Allow
the piston to smoothly and slowly retract until it has returned to its initial position. Wait for about one
second and then remove the pipette tip from the solution. If there are drops on the outside of the
pipette tip, carefully remove them with a lint free tissue—do not draw out any solution from the pipette
tip (through capillary forces of the paper tissue)—or if necessary, repeat the process with a new pipette
tip.
OPERATING THE CHLOROCHEK
3.5 Conditioning (continued)
O mmol/L Standard Solution, holding the tip in the
2
SECTION 3
O
2
17