Myron L D-6 - Manual (Page 16)

B. Measuring Resistivity
Resistivity is for low conductivity solutions. In a cell cup the value may
drift from trace contaminants or absorption from atmospheric gasses,
so measuring a flowing sample is required.
1.
Ensure pH protective cap is secure to avoid contamination.
2. Hold instrument at 30° angle (cup sloping downward).
3. Let sample flow continuously into conductivity cell with no aeration.
4. Press key; use best reading.
NOTE: If reading is lower than 10 kilohms display will be dashes: [ - - - - ].
Use Conductivity instead.
C. Measuring pH (D-6)
WArNING: When using a Digital Dialysate Meter™ to test the pH of
dialysate, ALWAYS perform a calibration check of the pH sensor at
the beginning and end of each work day or more often if required by
your clinic’s internal procedures (see pH Calibration, pg. 20).
1. Remove protective cap by grasping its sides and pulling up.
2. Rinse pH/ORP sensor well and conductivity cell 3 times with
sample to be measured. Shake out each sample to remove
any residual liquid.
3. Refill pH/ORP sensor well and conductivity cell with sample.
4. Press .
5. Note value displayed.
6. IMPOrTANT: After use, fill pH/ORP sensor well with Myron L pH
Sensor Storage Solution and replace protective cap. If Myron L
pH Sensor Storage Solution is unavailable, you can use a strong
KCl solution (preferred), a saturated solution of NaCl table salt and
tap water (next best alternative), or a pH 4 buffer (least desirable
alternative). NEVEr use distilled water or plain tap water as this
will quickly deplete the sensor (ref. Cleaning Sensors, 3. pH/ORP,
pg. 35). Do not allow pH/ORP sensor to dry out.
D. Measuring ORP (D-6)
1. Remove protective cap by grasping its sides and pulling up.
2. Rinse pH/ORP sensor well and conductivity cell 3 times with
sample to be measured. Shake out each sample to remove
any residual liquid.
3. Refill both the pH/ORP sensor well and the conductivity cell
with sample.
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