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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 

HI8733

 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 conductivity 

reading, C

25

.

•  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

t

.

•  The temperature coefficient 

β

 of the solution is calculated as given 

by the following formula:

 

 

 

      (C

t

 ‑ C

25

)

 

     β 

= 100 x

 

 

 

    (t ‑ 25) x C

25

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 

HI8733

 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.

DETERMINING THE TEMPERATURE 

COEFFICIENT OF A SOLUTION (HI8733)

Содержание HI 8733

Страница 1: ...1 Instruction Manual HI8633 HI8733 HI8734 Reliable and Waterproof Multi Range Conductivity Meters www hannainst com...

Страница 2: ...necessary information for correct use of these instruments as well as a precise idea of their versatility If you need additional technical information do not hesitate to e mail us at tech hannainst c...

Страница 3: ...PECIFICATIONS OF HI8733 6 FUNCTIONAL DESCRIPTION SPECIFICATIONS OF HI8734 7 OPERATIONAL GUIDE 8 CALIBRATION 9 CONDUCTIVITY VERSUS TEMPERATURE CHART 13 TDS VERSUS TEMPERATURE CHART 14 DETERMINING THE T...

Страница 4: ...ont panel The ratio between conductivity and TDS is factory set at 0 5 Moreover the 4 ring potentiometric probes supplied with the meters are madeofruggedPVC idealforindoor aswellasoutdoormeasurements...

Страница 5: ...ccuracy 20 C 68 F 1 Full scale excluding probe error Typical EMC Deviation 2 Full Scale Calibration Manual 1 point through EC knob Temperature Compensation Manual 0 to 50 C 32 to 122 F with 2 C Probe...

Страница 6: ...with adjustable from 0 to 2 5 C Probe included HI76302W ATC with 1m 3 3 cable Environment 0 to 50 C 32 to 122 F RH max 100 0 to 50 C 32 to 122 F RH max 100 Battery Type 1 x 9V alkaline Battery Life A...

Страница 7: ...g L Resolution 0 1 1 mg L 0 01 g L Accuracy 20 C 68 F 1 Full scale excluding probe error Typical EMC Deviation 2 Full Scale Calibration Manual 1 point through TDS knob Temperature Compensation Manual...

Страница 8: ...stic beakers or con tainers to minimize any EMC interference Tap the probe lightly on the bottom of the beaker to remove any air bubbles which may be trapped inside the PVC sleeve Turn the instrument...

Страница 9: ...7030 or HI8030 12880 S cm 12 88 mS cm conductivity solution for HI8633 and HI8733 and HI7032 1382 mg L 2764 S cm TDS solution for HI8734 ChecktempC or another accurate thermometer with 0 1 C resolutio...

Страница 10: ...e display shows for HI8633 the conductivity reading at 25 C see the conductivity vs temperature table e g 25 C 12880 S cm 12 88 mS cm or for HI8734 the TDS reading at 25 C see the TDS vs temperature c...

Страница 11: ...ir bubbles remain trapped in the sleeve Switch the instrument on by pressing On Off Set the temperature coefficient knob to 2 to compensate for the tem perature effect of average solutions to determin...

Страница 12: ...adjust the knob to read 11 67 mS see the conductivity vs temperature chart on page 13 All subsequent measurements will be compensated to 20 C The calibration is now complete and the instrument is rea...

Страница 13: ...ns at 30 C the values are 14120 S cm 1548 S cm or 5479 S cm respectively C F HI7030 HI8030 mS cm HI7031 HI8031 mS cm HI7033 HI8033 mS cm HI7034 HI8034 mS cm HI7035 HI8035 mS cm HI7039 HI8039 mS cm 0 3...

Страница 14: ...L or 12 41 g L when using HI7032 or HI7036 respectively At 20 C the values are 1251 mg L or 11 24 g L respectively With the solutions at 30 C the values are 1515 mg L or 13 61 g L respectively C F HI...

Страница 15: ...g 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...

Страница 16: ...iable measurements It is recommended to replace the battery immediately Battery replacement must only take place in a nonhazardous area using a 9V alkaline battery Unscrew the three screws on the rear...

Страница 17: ...at the sleeve is in the right direction with the four holes towards the cable end After cleaning the probe recalibrate the instrument The probe body is in PVC For this reason it must never come into c...

Страница 18: ...230 mL bottle HI7039L 5000 S cm 500 mL bottle HI7039M 5000 S cm 230 mL bottle HI7032L 1382 ppm mg L 500 mL bottle HI7032M 1382 ppm mg L 230 mL bottle HI7036L 12 41 ppt g L 500 mL bottle HI7036M 12 41...

Страница 19: ...t the model number date of purchase serial number and the nature of the problem If the repair is not covered by the warranty you will be notified of the charges incurred If the instrument is to be ret...

Страница 20: ...ruments Inc Highland Industrial Park 584 Park East Drive Woonsocket RI 02895 USA www hannainst com Local Office Hanna Instruments Inc Highland Industrial Park 584 Park East Drive Woonsocket RI 02895 U...

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