Thermo Fisher Scientific CyberScan CON 400 (For units manufactured from March 2010 onwards) - Manual (Page 51)

Instruction Manual CON 400
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13 ADDENDUM 1: CALIBRATION TIPS
You only need one calibration for measurement throughout the entire range of the meter. If a
range was not calibrated, the meter automatically detects the closest range calibrated and
uses that calibration information. However, only the ranges that were calibrated have
maximum accuracy.
• If you are measuring in ranges near to or greater than 20 mS (10 ppt), or
near to or lower than 100 µS (50 ppm), calibrate the meter at least once a
week to get specified ±1% F.S. accuracy.
• If you are measuring in the mid-ranges and you washed the probe in
deionized water and stored it dry, calibrate the meter at least once a month.
•
Wet the probe for 10 minutes before calibrating or taking readings to saturate the probe
surface and minimize drift. If you make measurements at extreme temperatures, calibrate the
meter at least once a week.
You should only use the conductivity / TDS / temperature probe specified for these meters.
These probes have a built-in temperature sensor. If you use a different probe without a
temperature sensor, you must measure the solution temperature separately and manually
enter the solution temperature (see manual temperature compensation section on pages 16-
17 ).