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User Manual

ManualsBrandsApera Instruments, LLC ManualsIndustrial & ScientificApera Instruments AI209-T Value Series PH20 pH Tester Combo Kit, Including The Maintenance Set, and a CalPod Solution Holder for Easy Calibration
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7
Calibration Indication Icon
Calibration Standards
Measuring Range
84 μS/cm
0 - 200 μS/cm
1413 μS/cm
200 - 2000 μS/cm
12.88 mS/cm
2 - 20 mS/cm
For conductivity calibration solutions, we recommend that users replace new solutions after 5 times of use to
keep the standard solution’s accuracy. Do NOT pour the used calibration solutions back into the solution
bottles in case of contamination.
7
Conductivity Measurement
7.1 Short press to turn on the tester. Rinse the probe in distilled water and dry it.
Dip the probe into
your sample solution, make a quick stir, and hold still. Record the reading after it is fully stabilized
( comes up and stays). Press to switch from conductivity to TDS, and Salinity.
7.2 Unit Conversion
a) 1000 µS/cm
= 1 mS/cm = 1 EC (In conductivity mode, the unit will automatically turn from µS to
mS if the reading is greater than 1999 µS, meaning you will only see 2.XX mS instead of 2XXX µS)
b) 1000 ppm = 1 ppt (In TDS mode, the unit will automatically turn from ppm to ppt if the reading
is greater than 999 ppm, meaning you will only see 1.XX ppt instead of 1XXX ppm)
c) The TDS and Salinity values are converted from the conductivity values via a certain conversion
factor. TDS and conductivity is linear related, and its conversion factor is 0.40 to 1.00. Adjust the
factor in parameter setting P5 based on the requirements in different industries. The factory
default setting is 0.71.
d) Salinity and conductivity is linear related, and its conversion factor is 0.5.
e) The tester only needs to be calibrated in Conductivity mode.
f) Conversion Example: if conductivity measurement is 1000µS/cm, then the default TDS
measurement will be 710 ppm (under the default 0.71 conversion factor), and the salinity be 0.5
ppt. If TDS conversion rate is changed to 0.5, then the TDS measurement will be 500 ppm.
7.3 Temperature compensation factor
The default setting of the temp. compensation factor is 2.0%/˚C. User can adjust the factor based on
test solution and experimental data in parameter setting P4. The following table is some common
examples for setting up the temp. compensation factor.