Thermo Fisher Scientific CyberScan CON 400 (For units manufactured from March 2010 onwards) - Manual (Page 17)

Instruction Manual CON 400
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NOTES:
When entering calibration mode, the meter
displays the factory default value. If the meter
was previously calibrated, the display may
seem to “jump” to the factory default value
when switching from measurement to
calibration mode. This is expected.
To exit from Conductivity calibration
mode without confirming calibration, DO
NOT press the ENTER key in step 6. Press
CAL/MEAS instead. This will retain the
meter’s old calibration data in the measuring
range of the calibration.
You can offset the conductivity reading up to
±40% from factory default value. If your
measured value differs by more than ±40%,
clean or replace probe if needed.
The minimum offset reading allowable is
limited to 10% of full scale reading of the
range you are working in. The maximum offset reading allowed is the range full scale reading
Eutech Instruments/ Oakton Instruments offers a wide selection of high-quality calibration
standards. See page 44 for more information.
Figure 7 - Proper Immersion of
the conductivity probe