Thermo Fisher Scientific EcoScan CON 6 & TDS 6 - Manual (Page 51)

Instruction Manual CON 6/TDS 6
47
15 ADDENDUM 3: CALCULATING TEMPERATURE
COEFFICIENTS
To determine the temperature coefficient of your sample solution use this
formula:
Where:
tc
= Temperature coefficient
25
= 25 °C
C
T1
= Conductivity at Temp 1
C
T2
= Conductivity at Temp 2
T
1
= Temp 1
T
2
= Temp 2
NOTE:
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 following
instructions as described in Section 6.5 – Temperature Coefficient.
2. Wait for 5 minutes. Note T
1
and C
T1
(conductivity at T
1
).
3. Condition the sample solution and probe to a temperature (T
2
) that is about
5 °C to 10 °C different from T
1
, and note the conductivity reading C
T2
.
NOTE:
Record your results for future reference. Ideally T
1
and T
2
should
bracket your measurement temperature, and should not different by
more than 5 °C.