Manual

Function Solution Recalibrate if
Dialysate Meter
Reports Below
Recalibrate if
Dialysate Meter
Reports Above
Conductivity
(NaCl)
14.00 mS 13.86 mS 14.14 mS
Conductivity
(KCl)
7000µS 6930µS 7070µS
TDS 442™ Solution
(3000 PPM)
3030 ppm 2970 ppm
pH 7.0 Buffer 6.96 pH 7.04 pH
4.0 Buffer 3.96 pH 4.04 pH
10.0 Buffer 9.96 pH 10.04 pH
Once in “CAL” mode, the key becomes an accept key. At each
point, pressing accepts the new calibration value and steps you
to the next adjustment (or out of “CAL” mode if there are no more steps).
To bypass a calibration step, simply press to accept the present
value as is.
b. Leaving Calibration
Calibration is complete when the “CAL” icon goes out. Pressing any
measurement key cancels changes not yet accepted and exits calibration
mode.
Leaving pH after the 2nd buffer results in the same gain being entered
in place of the 3rd buffer.
2. Calibration Limits
There are calibration limits. A nominal “FAC” value is an ideal value
stored by the factory. Attempts to calibrate too far, up or down, from
there will cause the displayed value to be replaced with “FAC”. If
you accept it (press the CAL key), you will have the original default
factory calibration for this measurement. The need to calibrate out
so far that “FAC” appears indicates a procedural problem, incorrect
standard solution, a very dirty cell cup or an aging pH/ORP sensor (ref.
Troubleshooting Chart, pg. 37-38).
WARNING:
• Factorysettingsdonottakeintoaccountthecurrentconditionof
the sensor installed in your instrument.
• Ifyouareunabletoadjustthecalibrationvaluewithoutcausing
the “FAC” icon to appear, your conductivity or pH/ORP sensor is
damaged and must be replaced.
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