Manual

NOTES: If a wrong buffer is added (outside of 6-8 pH),“7” and “BUFFER”
willash,andtheDialysateMeterwillnotadjust.
The uncalibrated pH value displayed in step 4 will assist in determining
the accuracy of the pH sensor. If the pH reading is above 8 with pH
7 buffer solution, the sensor well needs additional rinsing or the pH
sensor is defective and needs to be replaced .
5. Press or until the display reads 7.00.
NOTE: Attempted calibration of >1 pH unit from factory calibration will
cause “FAC” to appear. This indicates the need for sensor replacement
(ref. Troubleshooting pg. 37-38) or fresh buffer solution.
WARNING: The “FAC” internal electronic calibration is not intended to
replace calibration with pH buffers. It assumes an ideal pH sensor.
You may press to accept the preset factory value, or you may
reduce your variation from factory setting by pressing or .
6. Press to accept the new value. The pH Zero Calibration
is now complete. Continue with pH Gain Calibration. DO NOT
press any measurement keys as this will exit calibration.
b. pH Gain Calibration (D-6)
Important: Always calibrate or verify your Dialysate Meter with a pH 7
buffer solution before adjusting the gain with acid or base buffers, i.e.,
4 and/or 10, etc. Either acid or base solution can be used for the 2nd
point “Gain” calibration and then the opposite for the 3rd point. The
display will verify that a buffer is in the sensor well by displaying either
“Acd” or “bAS”.
1. The pH calibration mode is initiated by either completion of
the pH Zero Calibration, or verifying 7 buffer and pressing the
key twice while in pH measurement mode.
2. At this point the “CAL”, “BUFFER” and “Acd” or “bAS”
annunciators will be displayed (see Figures 6 and 7).
NOTE: If the “Acd” and “bAS” indicators are blinking, the unit is indicating an
error and needs either an acid or base solution present in the sensor well .
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