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iNTENANCE

9.  PROBE MAINTENANCE

Periodic Maintenance

Proper care and maintenance is essential for accurate readings. Cleaning, 
calibrating, and appropriate storage extends the life of the probe.
• Inspect connector for corrosion and replace probe if necessary.
• Inspect probe and cable for cracks or points of broken insulation. 

If any present replace the probe.

• After use rinse the probe with tap water and dry it.
• Monthly, a more thorough cleaning is advised. Clean the EC sensor 

with a non-abrasive, mild detergent.

Cleaning & Conditioning

pH portion

• Remove the protective cap.
• If the bulb and  / or junction are dry, soak the electrode in 

HI70300

 

Storage solution for at least 30 minutes. To ensure a quick response 
time, the glass bulb and the junction should be kept moist and not 
allowed to dry. 

• Rinse the sensor in flowing water then clean by soaking it for 

5 minutes in 

HI700661

 Cleaning solution. 

• For particular impurities, clean by soaking the sensor for 1 minute 

in 

HI7073

 Protein cleaning solution or 

HI7077

 Oil and fat cleaning 

solution. After cleaning, soak the sensor in 

HI70300

 Storage solution 

for 30 minutes before calibrating.

EC portion

• After every series of measurements, rinse the probe with tap water.
• If a more thorough cleaning is required clean the sensor with a soft 

brush to loosen any debris. 

• Use a mild detergent to remove oily coatings. 
• Flush with purified water after cleaning. 

Notes:

 Recalibrate the meter after cleaning. If, after cleaning, the 

meter still can not be calibrated, replace the probe.
For field applications, have a spare probe ready. When maintenance 

does not correct the issue, change the probe and recalibrate the meter.

Storage

• Store the sensor with a few drops of 

HI70300

 Storage solution or 

pH 4.01 buffer in the protective cap. Tap water may also be used for 
a very short period (a few days).

• Never use distilled or deionized water to store pH sensors.

Содержание HI9812-51

Страница 1: ...INSTRUCTION MANUAL HI9812 51 Portable pH EC TDS Temperature Meter...

Страница 2: ...a Hanna Instruments product Please read this instruction manual carefully before using this instrument This manual will provide you with the necessary information for correct use of this instrument a...

Страница 3: ...Battery Replacement 8 5 2 Connecting the Electrode 9 5 3 Turning the Meter On 9 5 4 Sensor Preparation Conditioning 9 6 Calibration 10 6 1 pH 10 6 2 EC TDS 11 7 Measurement 12 7 1 pH 12 7 2 EC TDS 12...

Страница 4: ...efective item must be returned in its original packing material with the supplied accessories 2 GENERAL DESCRIPTION TheHI9812 51isaportable waterresistantmeterdesignedtobepaired with HI1285 51 pH EC T...

Страница 5: ...temperature to match the solution value 1 3 2 5 6 7 8 9 10 11 4 12 1 8 pin DIN connector socket 2 Battery level indicator 3 LCD display 4 On screen calibration knob indicator 5 pH key pH range selecti...

Страница 6: ...lution 10 ppm mg L Accuracy 2 f s ppm mg L 25 C 77 F Calibration Manual 1 point Temp compensation Automatic from 0 to 70 C with 2 C Conversion factor 0 5 Temperature Range 0 0 to 70 0 C Resolution 0 1...

Страница 7: ...rature 0 to 50 C 32 to 122 F Tip shape Spheric 8 0 mm 0 31 Glass type Low Temperature LT Temperature sensor Yes Amplifier Yes Body material Polypropylene Dimensions Length 186 mm 7 32 Shaft length 95...

Страница 8: ...n the back of the instrument to open the battery compartment Remove the old battery Insert one new 9 V Alkaline battery in the battery compartment while paying attention to the correct polarity Close...

Страница 9: ...N Turn the instrument on by pressing the On Off key 5 4 SENSOR PREPARATION CONDITIONING 1 Remove the protective cap 2 If the protective cap does not contain any liquid pour HI70300 Storage solution in...

Страница 10: ...H key to select pH measurement mode 3 Remove the protective cap and rinse the probe 4 Pour buffer solution into a clean beaker 5 Immerse the tip of the probe 4 cm 1 1 2 in selected buffer and wait a f...

Страница 11: ...ent to cover the sensing portion of the probe 4 cm 1 1 2 If possible use plastic beakers to minimize any EMC interferences For accurate calibration and to minimize cross contamination use two beakers...

Страница 12: ...rinse the probe with some of the sample to be measured next 7 2 EC TDS Immerse the probe tip 4 cm 1 1 2 into the sample If possible use plastic beakers to minimize any EMC interferences Tap the probe...

Страница 13: ...measurement to stabilize Read value is displayed on the LCD 7 4 WARNINGS pH EC TDS If measured value is outside the parameter limit of the instrument the maximum or minimum value is displayed blinkin...

Страница 14: ...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 01 9 82 55 131 4 08 6 84 6 98 8 99 9 79 60 140 4 09 6 84 6...

Страница 15: ...soaking it for 5 minutes in HI700661 Cleaning solution For particular impurities clean by soaking the sensor for 1 minute in HI7073 Protein cleaning solution or HI7077 Oil and fat cleaning solution A...

Страница 16: ...solution 500 mL HI7009L pH 9 18 buffer solution 500 mL HI7010L pH 10 01 buffer solution 500 mL Conductivity TDS Calibration Solutions HI7031L 1413 S cm solution 500 mL HI7032L 1382 ppm mg L solution...

Страница 17: ...te collection point for recycling Ensuring proper product and battery disposal prevents potential negative consequences for the environment and human health which may be caused by inappropriate handli...

Страница 18: ...service is required contact your local Hanna Instruments office If under warranty report the model number date of purchase serial number engraved on the bottom of the meter and the nature of the probl...

Страница 19: ...Hanna Instruments reserves the right to modify the design construction or appearance of its products without advance notice...

Страница 20: ...World Headquarters Hanna Instruments Inc Highland Industrial Park 584 Park East Drive Woonsocket RI 02895 USA www hannainst com MAN9812 51 Printed in ROMANIA...

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