Bante904P Portable Conductivity/DO Meter
25
1.
Press and hold the
o
C
key for 3 seconds to enter the temperature setting.
2.
Press the
or
key to set the temperature to 25° C.
3.
Place the electrode into the sample solution A and record the temperature value T
A
and conductivity value C
TA
.
4.
Condition the sample solution and electrode to a temperature that is about 5° C to 10
° C different from T
A
. Record the temperature value T
B
and
conductivity value C
TB
.
5.
Calculate the temperature coefficient according to the formula above.
Addendum 3: How to calculate the TDS conversion factor
To determine the TDS conversion factor use the formula below:
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 64g of potassium chloride reagent in 1 litre distilled water. If its conductivity value is 100mS/cm, then TDS conversion factor is 0.64.
Addendum 4: Preparation of the Zero Oxygen Solution
Dissolve 500mg of sodium sulfate (Na
2
SO
3
) reagent and a small amount of cobalt(II) chloride hexahydrate (CoCl
2
•
6H
2
O) in the 250mL distilled water, mix the
solution until the reagent is completely dissolved.
Actual TDS
Actual Conductivity @ 25° C
