Myron L 9PTK with FCE Free Chlorine User Manual

Page 34

Press

to step the displayed value toward the

standard’s value or hold a key down to scroll rapidly through

the reading.

Press

once to confirm new value and end the calibration

sequence for this particular solution type.

3. Resistivity Calibration

Resistivity is the reciprocal of Conductivity. To calibrate resistivity,

calibrate conductivity for the solution type you wish to measure (ref.

Conductivity or TDS Calibration, pg. 29).

4. Reloading Factory Calibration (Cond or TDS)

If calibration is suspect or known to be incorrect, and no standard

solution is available, the calibration value can be replaced with the

original factory value for that solution. This “FAC” value is the same for

all Ultrameter IIIs, and returns you to a known state without solution

in the cell. The “FAC” internal electronics calibration (which bypasses

the electrodes and cell) is not intended to replace calibration with

conductivity/TDS standard solutions. If another solution type requires

resetting, change solution type and repeat this procedure.
a.

Press

. (If in “User” solution mode — press cal key

twice if in Conductivity, and three times if in TDS to skip over

tempco and ratio adjustments.)

Press

key until “Fac” appears and release.

Press

to accept the factory calibration setting.

5. Alkalinity Calibration

Prepare the materials required for titration: Alkalinity Standard Solution

100PPM, Reagent: A1, cell extender, T-plunger, and 100 µL pipette with

a clean tip installed.
nOte: If you do not complete each titration point within the 3-minute

timeout period, the unit exits the Alkalinity function. Between titrations,

the unit will automatically power off after the period of inactivity defined

in the AUTO OFF setting (ref. AUTO OFF, pg. 45). Press alK to start the

titration process over from step 1.
If you make a gross error in your titration method, e.g., you forget to add

sample to the cell, “err” will display. Start the titration over from Step 1

to obtain a reading.