Instruction manual

Instruction Manual PC 10
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4.5. Conductivity Calibration
The Important Information on Conductivity Calibration
Your meter has four measuring ranges. You can calibrate one point in each of the measuring
ranges (up to four points). If you are measuring values in more than one range, make sure to
calibrate each of the ranges you are measuring.
The following table lists the corresponding conductivity range. You should calibrate each
range using a solution that falls between the values in the “recommended calibration solution
range” column.
Conductivity Range Recommended Calibration
Solution Range
0.00 to 19.99 µS 6.00 to 17.00 µS
0.0 to 199.9 µS 60.0 to 170.0 µS
0 to 1999 µS 600 to 1700 µS
0.00 to 19.99 mS 6.00 to 17.00 mS
NOTE:
Minimum calibration value should be 20% of full scale for the specific range. E.g.: The
LOWEST calibration value for the range of 0.00 to 19.99 µS is 4.00 µS.
When you recalibrate your meter, old calibrations are replaced on a range basis. For example,
if you previously calibrated your conductivity meter at 1413 µS in the 0 to 1999 µS range and
you recalibrate at 1500 µS (also in the 0 to 1999 µS range), the meter will replace the old
calibration data (1413 µS) in that range. The meter will retain all calibration data in other
ranges.
To completely recalibrate your meter, or when you use a replacement probe, it is best to clear
all calibration data in memory. To erase all the old conductivity data, see Section 4.1:
Important Information on Meter Calibration.
NOTE:
These meters are factory set to a temperature coefficient of 2.00% per °C. For most
applications this will provide good results. The factory default value for normalization
temperature is 25°C.