Myron-l 6PFCE and 4P Manual de usuario descargar pdf (Pagina 39)

allowed to dry out.

However, if this occurs, the sensor may sometimes

be rejuvenated by rst cleaning the sensor well with Isopropyl alcohol or

a liquid spray cleaner such as Windex™ or Fantastic™ and rinsing well.

Do not scrub or wipe the pH/ORP sensor.

Then use one of the following methods:

1. Pour a HOT salt solution ~60°C/140°F — a potassium chloride

(KCI) solution such as Myron L pH/ORP Sensor Storage

Solution is preferable, but HOT tap water with table salt (NaCl)

will work ne — in the sensor well and allow to cool. Retest.

2. Pour DI water in the sensor well and allow to stand for no more

than 4 hours (longer can deplete the reference solution

and damage the glass bulb). Retest.

If neither method is successful, the sensor must be replaced.

“Drifting” can be caused by a lm on the pH sensor bulb and/or reference.

Use isopropyl alcohol (IPA) or spray a liquid cleaner such as Windex™

or Fantastic™ into the sensor well to clean it. The sensor bulb is very

thin and delicate. Do not scrub or wipe the pH/ORP sensor.

pH/ORP SENSOR

Top View

ORP

Electrode

pH Glass

Electrode

Sensor

Body

Reference

Junction

under Glass

pH Bulb

Leaving high pH (alkaline) solutions in contact with the pH sensor for

long periods of time is harmful and will cause damage. Rinsing such

liquids from the pH/ORP sensor well and relling it with Myron L Storage

Solution, a saturated KCl solution, pH 4 buffer, or a saturated solution of

table salt and tap water, will extend the useful life.

Samples containing chlorine, sulfur, or ammonia can “poison” any pH

electrode. If it is necessary to measure the pH of any such sample,

thoroughly rinse the sensor well with clean water immediately after

taking the measurement. Any sample element that reduces (adds an

electron to) silver, such as cyanide, will attack the reference electrode.

Replacement sensors are available only from the Myron L Company or its

authorized distributors (see Replacement pH/ORP Sensor (6PFC

), pg. 39).

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