Myron L TechPro II, Operation Manual

Page: 15 / 44

11
To bypass a calibration step, simply press to accept the present
value as is.
b. Leaving Calibration
Calibration is complete when the “CAL” icon goes out. Pressing any
measurement key cancels changes not yet accepted and exits calibration
mode.
Leaving pH after the 2nd buffer results in the same gain being entered in
place of the 3rd buffer.
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 sensor (ref. Troubleshooting Chart, pg. 22).
C. Calibration Procedures
1. Conductivity or TDS Calibration (TPH1 & TP1)
a. Rinse conductivity cell three times with proper standard (KCl,
NaCl, or 442) (ref. Cond/TDS Standard Solutions, pg. 24).
b. Refill conductivity cell with same standard. KCl-7000 used in
Figure 2, pg. 11.
c. Press or , then press , “CAL” icon will appear
on the display (see Figure 2).
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.
Figure 2
° C
KCl
COND
CAL