Manual

B. Maintenance of the pH/ORP Sensor
The sensor well must be kept wet with a solution. Before replacing
therubbercap,rinseandllthesensorwellwithMyronLpHSensor
Storage Solution. If unavailable, you can use an almost saturated KCl
solution, a saturated solution of table salt and tap water or pH 4 buffer
(ref. pH and ORP Practices to Maintain Calibration, pg. 24). NEVER
USE DISTILLED WATER.
VII. SPECIFIC RECOMMENDED MEASURING PROCEDURES
If the proper solution is not selected (KCl, NaCl, or 442), see Solution
Selection, pg. 15.
CAUTION:
• ForCond/Res/TDSmeasurements:
• ThepH/ORPsensorwellcapMUST be sealed.
• AnycrystalsorotherresiduearoundthecapMUST be rinsed
away to prevent contamination of the conductivity sample.
• TheconductivitycellMUSTberinsedandlledatleast3times
with sample before each measurement is taken.
• ForpH/ORPmeasurements:
• BoththepH/ORPsensorwellandtheconductivitycellMUST
berinsedandlledatleast3timeswithsamplebeforeeach
measurement is taken.
• After sampling high concentration solutions or temperature
extremes, more rinsing may be required.
A. Measuring Conductivity & Total Dissolved Solids (TDS)
WARNING: When using a Digital Dialysate Meter™ to check the
conductivity of dialysate, the solution conversion factor MUST be
set to the NaCl conversion factor.
• Ifthepropersolutionconversionfactorisnotselected,seeProcedure
to Select a Solution, pg. 15, for instructions on setting it.
1. Rinse cell cup 3 times with sample to be measured. (This
conditions the temperature compensation network and prepares
the cell.)
2. Rellcellcupwithsample.
3. Press or .
4. Take reading. A display of [- - - -] indicates an overrange
condition.
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