Calibration Indication Icon
Calibration Standards
Measuring Range
84μS/cm
0 ~ 200μS/cm
1413μS/cm
200 ~ 2000μS/cm
12.88mS/cm
2 ~ 20mS/cm
8.2. The tester has been calibrated in factory. Generally, user can use the tester directly or users
can test conductivity standard solutions first. If the error is big, then calibration is needed.
8.3. Temperature compensation factor: The default setting of the temperature compensation
factor is 2.0%/
℃
. User can adjust the factor based on following test solution and experimental
data in parameter setting P4.
Solution
Temperature
compensation coefficient
Solution
Temperature
compensation coefficient
NaCl solution
2.12%/°C
10% hydrochloric acid
solution
1.32%/°C
5%NaOH solution
1.72%/°C
5% sulfuric acid solution
0.96%/°C
Dilute ammonia
solution
1.88%/°C
8.4. TDS and conductivity is linear related, and its conversion factor is 0.40~1.00. Adjust the factor
in parameter setting P5. The factory default setting is 0.71. Salinity and conductivity is linear
related, and its conversion factor is 0.5. The tester only needs to be calibrated in conductivity
mode, then after calibration, the meter can switch from conductivity to TDS or salinity mode.
8.5 With self-diagnostic information:
The tester has self-diagnostic function, information as following chart:
Icons
Self-diagnostic information
Checking
Wrong conductivity standard solution
or the recognition range of calibration
solution exceeds standard.
1. Check whether conductivity standard
solution is correct.
2. Check whether the probe is damaged.
Press key when measuring value is
not stable during measurement
Press key when icon appears.