2 data points for Calibration
Automatic Temperature Compensation
Restore Factory Default
0 to 19.99uS
20.00 to 199.9uS
200.0 to 1999uS
2.00 to 19.99mS
20.0 to 100.0mS
0.0 to 9.99ppm
10.0 to 99.9ppm
100 to 999ppm
1.0 to 9.99ppt
10.0 to 100.0ppt
At most 2 points
Auto (ATC) from 32-122℉ or 0-50℃
To determine the temperature coefficient of your sample solution use this formula:
TC = Temperature coefficient
CT1 =Conductivity at Temp. 1
CT2 = Conductivity at Temp. 2
T1 = Temp. 1
T2 = Temp. 2
25 = 25°C
A controlled temperature water bath is ideal for this procedure.
1. Immerse the probe into a sample of your solution and adjust the temperature coefficient to 0% (that is, no compensation) by performing the following:
2. Wait for 5 minutes. Note T1 and CT1 (conductivity at T1).
3. Condition the sample solution and probe to a temperature (T2) that is about 5°C to 10°C different from T1, and note the conductivity reading CT2.
NOTE: Record your results for future reference. Ideally T1 and T2 should bracket your measurement temperature, and should not differ by more than 5°C.
4. Calculate the temperature coefficient of your solution according to the formula shown above.
5. Enter the temperature coefficient you calculated into the meter.
The calculated temperature coefficient will now be applied to all the meter readings.
To determine the conductivity to TDS conversion factor for your solution:
1. Factor—the conductivity to ppm TDS conversion factor. Multiply conductivity by this factor to get ppm TDS for the type of TDS reading needed.
2. 442—a formulation that most closely represents the conductivity to ppm relationship, on average, for naturally occurring fresh water.
3. TDS Your Material—These columns are for you to write in your application-specific conductivity-to-ppm values and conversion factors for future reference.
Factor = actual TDS ÷ Actual Conductivity @ 25°C lists some commonly used conversion factors.
TDS Your Material
Conductivity:The conductivity of water is usually used to indicate the purity of water. If the conductivity is high, it means that the content of conductive minerals in water is very high, and the purity of water is very low. If the conductivity is very low, it indicates the minerals that can be ionized in water. Rarely, the purity of water is relatively high. For example, the conductivity of high-purity water is EC=0.1.0us/cm; the conductivity of ordinary drinking water is 1~10 us/c.