ORP-8083 Industrial Composite Glass ORP Sensor

Factory technology reference

1. Zero mV value 86±15mV(25C)

2. Grade difference ≥165mV(25C)

3. Operation and maintenance

Equipment and solution required for testing pH/mV meter

buffer 4.01 solution( include saturated quinhydrone)

buffer7.00 solution( include saturated quinhydrone)

Preparation

There is a soaking bottle filled with ORP electrode soaking solution attached to the head of

SO100/ ORP combination electrode. Before using, remove it and soak electrode into distilled

water and rinse, then take out and make dry. Now the electrode is ready. (Be ware: must not rub

sensing element forcibly).

test electrode

Connect ORP electrode to input end of pH/mV meter and make sure the connection is correct.

Set pH/mV at testing gear

Set electrode in buffer solution of pH7.00 with saturated quinhydrone. After stirring, mV reading

E1 should be 86±15mV.

Rinse electrode with distilled water, then set it in buffer solution of pH4.01 with saturated

quinhydrone. After stabilizing, record mV meter reading E2. The difference between E1 and E2

should be 165mV.

Storage and maintenance

Rinse the electrode with distilled water during the interval of using.

Keep ORP electrode wet. If not in use for long period of time, it should be rinsed and stored in the

provided soaking bottle filled with soaking solution.

If it is refillable ORP electrode, cover filling hole with stopper in case leak of solution.

How to clean ORP electrode

If sensing element got contaminated, it will result in slow respond time and inaccurate reading.

Clean it as following

If contamination is mineral matter, set sensing element in HCL solution 0.1N for 10 minutes and

then rinse it with distilled water.

If the contamination is oil and grease coating, clean sensing element with detergent and rinse with

distilled water.

After above treatments, set electrode in saturated buffer pH4.01 for 15minutes and then rinse with

distilled water.

Note: after cleaning, at least soak electrode in solution for 8 hours and then it can be used again.

ORP electrode response time and accuracy