YSI 6 series Manual do Utilizador descarregar pdf (Página 21)

OUT OF RANGE

The out-of-range message is usually confirming that the pH probe has a bad slope and needs to be

cleaned and reconditioned. If this reconditioning is not successful, then the probe is defective and ready

for disposal. If the probe gives the warning message and the sonde passes the 10 Meg input test, then the

probe is defective.

SLOW RESPONSE

A slow-responding probe will benefit from the reconditioning procedure found in Chapter 2 of the 6-

Series manual. The biggest cause of a slow probe response is contamination of the pH reference

junction. This contamination is usually taken care of by the reconditioning procedure found in the

manual. In some cases the pH port connectors on the probe and sonde are the cause. Excess grease

which has gotten into the contacts is the usual cause. To clean, follow the procedure below:

PORT AND PROBE CLEANING PROCEDURE

To remove contamination -- which can include grease, saltwater electrolyte, and calibration reagents --

the probes and sonde can be submerged in hot tap water which has had dishwashing soap (with a

degreaser) added. The temperature should be around 35 to 40°C. The soapy water mix must be pumped

into the open sonde ports and probe connector to be effective. Using a lab rinse bottle will help flush out

the ports. Soak the probe and affected sonde connectors for one hour. Rinse thoroughly with DI water

after the soak. Follow this with a thorough rinse of 90% isopropyl alcohol. Shake or blow dry the port

with a dry air source or allow air-drying overnight.

600R, QS, SONDES INTEGRAL pH PROBE WITH REMOVABLE REFERENCE

The reference used on the 600R and 600QS sondes is replaceable and can also be reconditioned. When

using a bleach and water solution, soak the pH reference separately to avoid damaging the DO sensor.

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YSI 6 series Manual do Utilizador Página 21