Myron L 6Psi and 4P - Manual (Page 20)

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a. Rinse conductivity cell three times with your standard.
b. Refill conductivity cell with same standard.
c. Press or , then press twice in COND/three
times in TDS. The “CAL” icon will appear on the display.
d. Press or to step the displayed value toward the
standard’s value or hold a key down to scroll rapidly through
the reading.
e. 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. 15).
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 IIs,
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 or .
b. 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.)
c. Press key until “FAC” appears and release.
d. Press to accept the factory calibration setting.