User Guide

Highly acidic, alkaline samples or solutions with high salt content

might have a different coefficient than the customary 2% per degree °C.

In order to calculate this coefficient follow the procedure below:

• Immerse the probe of HI 8733 in the sample and adjust the

TEMPERATURE COEFFICIENT knob to 0% (i.e. no compensation).

• Condition the sample and probe to 25°C and note the conductiv-

ity reading, C

• Condition the sample and probe to a different temperature t°C

(approximately 10°C different from 25°C) and note the conduc-

tivity reading C

• The temperature coefficient ß of the solution is calculated as given

by the following formula:

- C

)

ß = 100 x

(t - 25) x C

The above procedure is suitable for determining the temperature

coefficient in a laboratory or where the temperature of the solution

can be controlled.

If this is not possible (e.g. on-site measurements), the following

procedure can be used providing the sample temperature varies by at

least 5°C or preferably 10°C:

• Immerse the probe of HI 8733 in the test solution and turn the

TEMPERATURE COEFFICIENT knob to 0% (no compensation).

• Check the conductivity reading and record the value. Make sure

the reading is stable, i.e. no greater variations than ±0.2 mS/

cm within a minute.

• Repeat the procedure when the temperature of the test solution

has changed by at least 5°C. Wait for the conductivity reading to

stabilize.

• Adjust the TEMPERATURE COEFFICIENT knob until the display

shows the same value as recorded earlier.

• The value indicated by the knob is the temperature coefficient of

the solution.

2.5

1.51

0.5

TEMPERATURE COEFFICIENT

DETERMINING THE TEMPERATUREDETERMINING THE TEMPERATURE

DETERMINING THE TEMPERATURE

COEFFICIENT OF A SOLUTION (HI 8733)COEFFICIENT OF A SOLUTION (HI 8733)

COEFFICIENT OF A SOLUTION (HI 8733)