Myron L D-6 User Manual

Page 18

Press any parameter key to exit ORP unit preference selection

or let the unit time out. ORP unit preference will be saved.

NOTE: Free chlorine as determined by the D-6 Dialysate Meter is a

measurement of the concentrations of Cl

, HOCl, and OCl- in solution. The

D-6 Dialysate Meter does NOT measure chloramines present in solution.

IX.

SOLuTION SELECTION

A. Why Solution Selection is Available

Conductivity, resistivity, and TDS require temperature correction to 25°C

values. Selection determines the temperature correction of conductivity

and calculation of TDS from compensated conductivity.

B. The 3 Solution Types

On the left side of the display is the salt solution characteristic used

to model temperature compensation of conductivity and its TDS

conversion. In hemodialysis facilities, using NaCl for Conductivity and

Resistivity and 442 (Natural Water characteristic) for TDS will meet

water testing requirements most of the time.
This assumes that Conductivity will be used to determine concentration

of dialysate solutions and that Resistivity will be used to determine

the purity of DI water given both dialysate and DI product water most

closely match the NaCl standard. This also assumes that TDS will be

used to check reverse osmosis feed and product water, which most

closely match the Natural Water characteristic.
This is how your instrument, as shipped from the factory, is set to

operate. However, the compensation and conversion solution type

can be changed to another programmed solution characteristic, when

necessary.

C. Calibration of Each Solution Type

A Digital Dialysate Meter™ stores and uses separate calibration values

for each of the three solution types.
If you’re using a Digital Dialysate Meter™ for BOTH dialysate

measurements AND product water quality measurements, ALWAYS

calibrate the conductivity, resistivity and TDS functions of your Digital

Dialysate Meter™ FOr EACH TYPE.

• Calibrating a function for one solution type DOES NOT affect

the calibration of the same function for other solution types.

• For example, calibrating a measurement function, such as

conductivity, for NaCl DOES NOT calibrate conductivity for KCl

or 442™.

D. Procedure to Select a Solution

WArNING:

When using a Digital Dialysate Meter™ to check the

conductivity of dialysate, the solution type MuST be set to use the