Bante900P Portable Multiparameter Water Quality Meter
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Addendum 5: How to calculate the temperature coefficient
To determine the temperature coefficient of sample solution use this formula:
T
c
= × 100%
Where:
T
C
=Temperature coefficient
C
TA
=Conductivity at Temperature A
C
TB
=Conductivity at Temperature B
T
A
=Temperature A
T
B
=Temperature B
1. Press and hold the
o
C key for 3 seconds to enter temperature setting mode.
2. Press
or
key to set the temperature at 25
o
C.
3. Dip the electrode into sample solution A.
4. Record the temperature value T
A
and conductivity value C
TA
.
5. Repeat the steps above, dip the electrode into same sample solution B. Make sure both sample solutions have about 5
o
C to 10
o
C difference.
6. Record the temperature value T
B
and conductivity value C
TB
.
7. Calculate the temperature coefficient of sample solution according to the formula shown above.
8. Enter the calculated temperature coefficient into the meter.
Addendum 6: How to calculate the TDS conversion factor
To determine the TDS conversion factor use the following formula:
Factor=
Where:
Actual TDS: value from the high purity water and precisely weighed NaCl or KCL reagent.
Actual Conductivity: the meter measured conductivity value.
For example:
Dissolve 64 grams of potassium chloride reagent in 1L distilled water. If its conductivity value is 100mS/cm, then TDS conversion factor is 0.64.
C
TB
-C
TA
C
TA
(T
B
-25)-C
TB
(T
A
-25)
Actual TDS
Actual Conductivity @ 25ºC
