Thermo Fisher Scientific EcoScan CON 6 & TDS 6 - Manual (Page 49)

Instruction Manual CON 6/TDS 6
45
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 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 5.2)