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XS Instruments COND 7 Plus User Manual

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15
7+Series Version 2.0
Calibration intervals
The meter is calibrated before leaving the factory and can generally be used right out of the box.
Normally perform calibration per month.
For high accuracy measurements or large temperature deviation from the reference temperature (25°C),
perform calibration per week.
Use conductivity standard solution to check whether there is error. Perform calibration for large error.
For new electrode or factory default setting, perform 3-point or 4-point calibration. Choose closer
standard solution to the sample solution to perform 1- point or 2-point calibration. For example: 1413
μS/cm standard solution is suited for range 0-2,000 μS/cm.
1-point and multi-point calibration
For 1-point calibration after 3-point or 4-point calibration, the previous calibration value in the same range will
be replaced, meanwhile, the meter will show the calibration guide icon of this point, other two calibration guide
icons will be deleted, but the chip will reserve the last calibration data. When choose multi-point calibration,
perform calibration from low to high concentration to avoid standard solution of low concentration being
contaminated.
Reference temperature
Reference temperature of factory default is 25°C. Other reference temperature can also be set for range 15°C
30°C. Select per parameter P2.5.
Temperature coefficient
The temperature compensation coefficient of the meter setting is 1.91%. However, the conductivity temperature
coefficient is different for solutions of a different variety and concentration. Set per parameter P2.6..
Note: When the coefficient for the temperature compensation is set to 0.00 (no compensation), the measurment
value will be based on the current temperature.
Solution
Temperature compensation coefficient
NaCl solution
2.12%/°C
5% NaOH solution
1.72%/°C
Dilute ammonia solution
1.88%/°C
10% hydrochloric acid solution
1.32%/°C
5% sulfuric acid solution
0.96%/°C
Avoid contamination of standard solution
Conductivity standard solution has no buffer. Please avoid being contaminated during usage. Submerge the electrode
in standard solution before wash the electrode and allow it dry. Please renew conductivity standard solution
frequently especially for standard solution of low concentration 84μS/cm. The contaminated standard solution can
affect accuracy.

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XS Instruments COND 7 Plus Specifications

General IconGeneral
BrandXS Instruments
ModelCOND 7 Plus
CategoryMeasuring Instruments
LanguageEnglish

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