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13

PERIODIC MAINTENANCE

Inspect the probe and the cable. The cable used for the connection to the 
meter must be intact and there must be no points of broken insulation 
on the cable or cracks on the probe stem or bulb. 
Connector must be perfectly clean and dry. If any scratches or cracks are 
present, replace the electrode. Rinse off any salt deposits with water.

CLEANING PROCEDURE

For better accuracy in measurements and to ensure a good performance 
of the probe, a frequent cleaning is recommended.
For this purpose, soak it in Hanna Instruments 

HI700661 

Cleaning 

Solution for 5 minutes.

Notes

: • For particular dirt (as for example protein, oil or grease) 

see the “Accessories” section for Hanna Instruments specific 
solutions.

 

• After cleaning the probe, it is recommended to recalibrate 

the meter. If it is not possible to calibrate, the probe has to 
be replaced with a new one.

 

• For field applications, it is always recommended to keep a 

spare probe handy. When anomalies are not resolved with 
simple maintenance, change the probe and recalibrate the 
meter.

PROBE MAINTENANCE

Summary of Contents for HI 9811-5

Page 1: ...1 www hannainst com Instruction Manual HI9811 5 Portable pH EC TDS C Meters...

Page 2: ...against defects in workmanship and materials when used for their intended purpose and maintained according to instructions Electrodes and probes are guaranteed for six months This warranty is limited...

Page 3: ...cking material until you are sure that the instrument functions correctly Any defective item must be returned in the original packing together with the supplied accessories HI9811 5 is the complete ve...

Page 4: ...obe 2 Liquid Crystal Display 3 pH range selection key 4 S cm EC range selection key 5 mg L TDS selection key 6 pH offset calibration knob 7 EC TDS calibration knob 8 C Temperature selection key 9 On O...

Page 5: ...0 5 C Conversion Factor 0 5 pH Calibration Manual 1 point through offset trimmer EC TDS Calibration Manual 1 point through slope trimmer EC TDS Temperature Compensation Automatic from 0 to 70 C 32 to...

Page 6: ...ak the tip in HI70300 storage solution for 30 minutes to reactivate it To take a pH measurement simply submerge the tip 4 cm 1 of the probe into the sample to be tested Select the pH mode Stir briefly...

Page 7: ...is in TDS mode TAKING TEMPERATURE MEASUREMENTS Submerge the tip 4 cm 1 of the probe into the sample to be tested Select the C mode Stir briefly and wait a couple of minutes for the reading to adjust...

Page 8: ...measure acidic samples or pH10 01 HI7010 for alkaline measurements If you need to calibrate to NIST standards use pH6 86 HI7006 instead of pH7 01 and pH9 18 HI7009 instead of pH10 01 PROCEDURE Connec...

Page 9: ...cm 1 into the solution The thermometer has to be close to the probe If turning the knob the needed value can not be reached clean the probe see the Probe Maintenance section If also after the probe cl...

Page 10: ...8 7 03 9 22 10 06 25 77 4 01 6 86 7 01 9 18 10 01 30 86 4 02 6 85 7 00 9 14 9 96 35 95 4 03 6 84 6 99 9 11 9 92 40 104 4 04 6 84 6 98 9 07 9 88 45 113 4 05 6 83 6 98 9 04 9 85 50 122 4 06 6 83 6 98 9...

Page 11: ...quested to calibrate the meter only in EC or TDS range The other range is thus automatically calibrated PROCEDURE Pour approximately 4 cm 1 of a conductivity calibration solution e g HI70031 into a be...

Page 12: ...battery immediately When the battery level is so low that it may cause unreliable measure ments the meter turns off Battery replacement must only take place in a nonhazardous area using a 9V alkaline...

Page 13: ...a good performance of the probe a frequent cleaning is recommended For this purpose soak it in Hanna Instruments HI700661 Cleaning Solution for 5 minutes Notes For particular dirt as for example prot...

Page 14: ...ottle HI7009L pH9 18 buffer solution 500 mL bottle HI7010L pH10 01 buffer solution 500 mL bottle CONDUCTIVITY TDS CALIBRATION SOLUTIONS HI7031L 1413 S cm solution 500 mL bottle HI7032L 1382 ppm mg L s...

Page 15: ...advance notice Before using this product make sure it is entirely suitable for your specific application and for the environment in which it is used Any variation introduced by the user to the suppli...

Page 16: ...ark 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 USA Phone 800 426 6287 Fax 401 765...

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