Bante Instruments Bante520, Инструкция по эксплуатации

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Bante520 Portable Conductivity Meter
14
Connector 6-pin
Display LCD
Power Requirements 3 × 1.5V “AA” batteries
Dimensions 170 (L) × 85 (W) × 30 (H)mm
Weight 300g
Addendum 1: Preparation of Conductivity Standard Solutions
Place AR potassium chloride reagent in a 50ml beaker and dry in an oven for 3 to 5 hours at 105° C, then cool to room temperature in desiccator.
CALIBRATION SOLUTIONS REAGENT
84µ S/cm Accurately weigh out 42.35mg of KCL and dissolve in 1 litre deionised water.
1413µ S/cm Accurately weigh out 745.9mg of KCL and dissolve in 1 litre deionised water.
12.88mS/cm Accurately weigh out 7.45g of KCL and dissolve in 1 litre deionised water.
111.8mS/cm Accurately weigh out 74.5g of KCL and dissolve in 1 litre deionised water.
Stir the solution until the reagent has thoroughly mixed. Preparation is completed.
Addendum 2: How to calculate the temperature coefficient
To determine the temperature coefficient of sample solution use the formula below:
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 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.
C
TB
-C
TA
C
TA
(T
B
-25)-C
TB
(T
A
-25)