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

16
2. Calibration Limits
There are calibration limits. A nominal “FAC” value is an ideal value
stored by the factory. Attempts to calibrate too far, up or down, from
there will cause the displayed value to be replaced with “FAC”. If
you accept it (press the “Cal” key), you will have the original default
factory calibration for this measurement. The need to calibrate so
far out that “FAC” appears indicates a procedural problem, incorrect
standard solution, a very dirty cell cup or an aging pH/ORP sensor (ref.
Troubleshooting Chart, pg. 34).
C. Calibration Procedures
1. Conductivity or TDS Calibration
a. Rinse conductivity cell three times with proper standard (KCl,
NaCl, or 442) (ref. Cond/TDS Standard Solutions, pg. 36). For
user calibration see User Calibration Conductivity/TDS below.
b. Refill conductivity cell with same standard. KCl-7000 shown.
c. Press or , then
Figure 5
°C
KCl
COND
CAL
press ; “CAL” icon will
appear on the display
(see Figure 5).
d. Press or to
step the displayed value toward the standard’s value (7032 >
7000) 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. If another
solution type is also to be measured, change solution type now
and repeat this procedure.
2. User Calibration Conductivity/TDS
Instrument must be in User mode, see Solution Selection, pg. 12.
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.