Instruction manual

Instruction Manual PC 510

pH electrode activation (for glass body electrodes only)

WARNING

: Only qualified persons with proficient with the safe handling of dangerous chemicals

should perform the procedure below. Provide proper containers, fume hoods, ventilation and waste

disposal. Safety goggles and protective clothing must be worn while performing this procedure. If

possible, replace with another electrode instead of performing this re-activation procedure.

1. Dip or stir the pH electrode in alcohol for 5 minutes.

2. Leave the electrode in tap water for 15 minutes.

3. Dip and stir the electrode in concentrate acid (such as HCl or H2SO4) for 5 minutes.

4. Repeat Step 2.

5. Dip and stir in strong base (NaOH) for 5 minutes.

6. Leave for 15 minutes in tap water.

7. Now test with standard calibration buffer solutions to see if the electrode yields acceptable results.

You may repeat step 3 through 6 up to three times for better response. If the response does not

improve, then your electrode is no longer functioning. Replace with a new electrode – call your

distributor for information.

9.2 Conductivity electrode

Keep the conductivity probe clean. Rinse the probe twice and gently

swirl it while you take readings. For best accuracy, soak a dry probe for

at least 5 to 10 minutes or longer before calibration. Rinse the probe

with de-ionised or tap water before storing. Never scratch the bands

with a hard substance. Do not strike the probe against any hard surface.

Do not immerse the probe in oily solutions. Clean the electrode

thoroughly by stirring it in a mild detergent bath or isopropyl alcohol.

Wipe the probe with a soft tissue paper. Rinse thoroughly in tap water

and then in de-ionised water. Re-calibrate the meter after cleaning the

probe.

The conductivity probe included with your meter features a removable

probe guard for easy cleaning.

To remove probe guard:

1. Grip yellow probe guard and twist clockwise. The locking notch will

release.

2. Slide probe guard off end of probe.

Figure 42: Conductivity probe