Thermo Fisher Scientific pH/ORP/Conductivity Field Monitors - Manual (Page 11)

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6.2 Conductivity Calibration
1. Plug in the Conductivity monitor to turn on. The
monitor will be in conductivity measurement mode.
2. Rinse the probe thoroughly with de-ionized water or
a rinse solution, then rinse with a small amount of
calibration solution.
3. Dip the probe into the calibration solution. Immerse
the probe tip at least 2 cm into the solution. Stir the
probe gently to create a homogeneous sample.
4. Press the CAL key to enter the calibration mode.
"CA" will flash on the display for a second and then
a value close to the calibration standard will flash.
5. Press the
S or T keys to adjust the display to
match the calibration standard value. Press the
CAL key. "CO" will flash on the display. The
reading should now display the same value as the
calibration standard. See Figure 4.
Figure 7 - Conductivity
Calibration Procedure
Immerse conductivity electrode
into a standard solution,
for example, 4 mS
Press
Press
Press