Elitech ChloroChek Chloridometer 3400 User Manual page 22

Sample Measurement without ID Management
3 The ChloroChek recognizes the added sample and the display will start counting up from 0 until it
reaches the final value. The final value remains on the screen until another sample is pipetted into the
Working Solution, or until user presses STANDBY on the screen.
NOTE:
Test results must be interpreted by a qualified physician, according to the pertinent guideline. See Appendix F,
Reference Intervals for Sweat Chloride.
4 After a final value is reached, the user can pipette another sample into the Working Solution following
Steps 1-3 above. The ChloroChek automatically recognizes each sample when injected and the value for
the last sample injection is displayed on the screen.
NOTE:
If the ChloroChek fails to automatically recognize the sample in Step 4, the chloride concentration in the sample is
less than 10 mmol/L. Verify this by adding 10 µL of the 100 mmol/L NaCl/H
reading will likely be above 100 mmol/L. Subtract 100 mmol/L from this final reading for the approximate final
result of the sample. Keep in mind that this result is below the specified linearity range of the ChloroChek and
should be recorded as <10 mmol/L.
NOTE:
If larger samples are used (>10 µL), take into account that the concentration is reported on the basis of the
titration for a 10 µL sample. Adjust the reading according to the volume of pure sweat in the sample using a
procedure validated by the laboratory.
NOTE:
Pressing STANDBY on the screen stops stirring the Working Solution, which conserves its functionality. Press
STANDBY if there will be a break of at least 5 minutes between measuring samples. The ChloroChek will
automatically go into STANDBY mode if no sample has been measured for at least 5 minutes. Press CONTINUE to
restart stirring and continue with more measurements. Users should perform quality control with control samples
before specimen samples are tested, to be sure that the ChloroChek is functioning correctly. In the STANDBY
Menu, if CANCEL is pressed this will cancel the measurement sequence and the Working Solution should be
discarded.
NOTE:
If ChloroChek has been in "Standby" mode with the electrodes in the working solution for an
extended period (> 1 Hour), an unexpected measurement (ghost reading) may occur. This is
due to excess chloride becoming unbound from the silver electrodes or silver chloride
precipitate.
OPERATING THE CHLOROCHEK
3.7 Sample Measurement (continued)
O Standard Solution (SS-251). The
2
SECTION 3
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