Sper Scientific 860031 pH - mV Bench-Top Meter - Manual (Page 31)

31
CONDUCTIVITY PROBE CALIBRATION
Selecting Calibration Standard Solution
For best results, select a conductivity, TDS or NaCl
standard near the sample value that you are measuring.
Alternatively, use a calibration solution value that is
approximately 2/3 of the full scale of the measurement
range that you plan to utilize.
For example, in the 0 to 1999 uS range, use 1413 uS
solution for calibration.
DO NOT reuse the calibration solution. Contaminants in
the solution will affect the calibration and the accuracy. Use
fresh solution each time.
Refer to the table below. For best results, use the
recommended solution for various conductivity and TDS
ranges.
The previous calibration data will be replaced after re
-calibrating. For example, if you previously calibrated the
conductivity meter at 1413 uS in the 0 ~ 1999 uS range,
when you re-calibrate at 1500 uS again (also in the 0 ~
Recommended
Cal. Solution
Range
1 0 ~ 19.99 uS 6.00 ~ 17.00 uS
2 0 ~ 199.9 uS 60.0 ~ 170.0 uS
3 0 ~ 1999 uS 600 ~ 1700 uS
4 0 ~ 19.99 mS 6.00 ~ 17.00 mS
5 0 ~ 199.9 mS 60.0 ~ 170.0 mS
Conductivity
Measuring
Range
Recommended
Cal. Solution
Range
1 0.00 ~ 9.99 ppm 3.00 ~ 8.50 ppm
2 0.0 ~ 99.9 ppm 30.0 ~ 85.0 ppm
3 0 ~ 999 ppm 300 ~ 850 ppm
4 0.00 ~ 9.99 ppt 3.0 ~ 8.50 ppt
5 0.0 ~ 199.9 ppt 30.0 ~ 85.0 ppt
TDS Measuring
Range
(factor=0.5)