FAQ - Frequently Asked Questions

Part Number: 080-60002-04  pH Electrode, 9618-10D

 

WARNING: Wear safety goggles and protective gloves during work.
  Exposing your eye to solvent may result in loss of eyesight. If solvent gets into your eyes, rinse your eyes with running water at once and then see a doctor.

 

CAUTION: When replacing the pH electrode, handle it with care.
  The stem tube and the end of the pH electrode may be damaged if exposed to a heavy load because they are made of glass. The broken glass may also result in injury.

 

NOTE: The internal reference solution contained in a new pH electrode cannot be used.
  Replace the internal reference solution according to "Refilling the pH Electrode with Internal Reference Solution" and the instruction manual included with the pH electrode before starting installation of the pH electrode.

  Click here for "Refilling the pH Electrode with Internal Reference Solution".

 

1. In the main window of pHM-40 Utility, click the (Replace Electrode) button to check the electrode status.

  

 In the window, the serial number (MFG No.) and usage time of the current electrode are displayed.

 

2. Turn off the power to the instrument, and unplug the AC adapter from the outlet.

 

3. Pull the knob (a) of the electrode holder to draw the slider out.

  

 

4. Remove the cable of the pH electrode from the clamp (A) in the slider. Loosen the knurled screw (B) that is securing the reel (C).
  NOTE: Do not remove the knurled screw. It may be lost.

  

 

5. Pull the sensor head (A) toward you, and then lift and remove it.
  Slide the connector cover (a), and then remove the electrode connector (b) and the temperature connector (c).
  NOTE:

    • When removing the sensor head, hold the slider with your hand so that it does not move.
    • Do not pull the sensor head by force after removing it. The cable of the sensor head may be broken.
    • If you are not installing a new electrode right away, turn the sensor head counter-clockwise in the slider so as to prevent the temperature connector from getting caught when the slider is returned to the main unit.
  HINT: To improve workability, you can remove the reel from the slider.

  

 

6. Remove the cable (a) of the pH electrode from the clamp (A) in the lower part of the electrode rear cover, and then loosen the knurled screw (B) of the electrode rear cover.
  NOTE: Do not remove the knurled screw. It may be lost.

  

 

7. Remove the pH electrode.
  1) Remove the pH electrode cover.
    NOTE: Before removing the pH electrode from the flow cell, empty solution out of the flow cell with a syringe. Solution remaining in the flow cell will leak from the upper part of the retaining screw when the pH electrode is removed.
  2) Pull the pH electrode up above the grip of the pH holder, and then install the dedicated cap for the pH electrode.

    

  HINT: If the pH electrode cable is being pulled, tilt the pH holder for easier maneuvering. Be sure to tilt the pH holder until the electrode holder comes into contact with the slider.

  CAUTION: Take care not to drop the pH electrode after removing it.
    The stem tube and the end of the pH electrode may be damaged if exposed to a heavy load because they are made of glass. The broken glass may also result in injury.

 

8. Remove the reel from the main unit, and then remove the fastener (A) that bundles the pH electrode cable.
  Remove the cable of the pH electrode from the reel.
  NOTE: When putting the slider back in the instrument with the pH electrode removed from the instrument, take care not to allow the temperature sensor to get caught by turning the sensor head left.

  

 

9. At the location 300 mm from the base of the cable of the new pH electrode, wind the cable around the reel.
  Place the cable on the end face (a) of the reel, and then wind it four times clockwise. Bundle the cable with the supplied fastener (A).

  

  NOTE:

    • Do not overlap the fastener on the reel end face (b).

      Otherwise, it may interfere with the internal part of the instrument when the slider is drawn in or out.
    • When winding the cable of the pH electrode, make sure that it does not overlap.

 

10. Connect the pH electrode's electrode connector and temperature connector to the sensor head.

 

11. Put the catch (b) of the slider on the notch (a) of the reel, and then install the reel (A) to the slider with the knurled screw (B). Without using a tool, finger-tighten the screw until you cannot tighten it any further.

  

 

12. Fix the cable (a) of the pH electrode with the clamp (A).

  

 

13. Remove the dedicate cap (A) for the pH electrode. The cap can be fixed on the instrument with the supplied clamp (B).
  NOTE: Keep the dedicated cap for the pH electrode in a safe place to prevent the loss.

  

 

14. While aligning the catch (a) of the pH electrode with the notch (b) of the electrode holder, slide and insert the electrode into the electrode insertion opening (c) of the flow cell from above.
  CAUTION: Insert the pH electrode straight into the electrode insertion opening of the flow cell.
    Incorrect installation of the pH electrode and the flow cell may cause the glass part to be exposed to an excessive load and damaged. The broken glass may also result in injury.

  

  HINT: Drawing out the slider and tilting the electrode holder will facilitate installation. Be sure to tilt the electrode holder until it comes in contact with the slider.

  NOTE:

    • When tilting the electrode holder, take care not to touch the glass section of the pH electrode.
    • Slide the pH electrode until the catch comes in contact with the bottom of the notch.

 

15. Fix the pH electrode with the electrode rear cover (A) and the knurled screw (B), and then fix the cable (a) of the pH electrode with the clamp (C).

  

 

16. Install the electrode cover (A) to the electrode holder.
  Push the grip of the electrode holder and retract the slider into the main unit.

  

 

17. Plug the AC adapter into the outlet and then start the instrument before starting pHM-40 Utility.

 

18. Click [Replace Electrode] and enter the serial number of the new electrode (MFG No.) in [New Electrode serial number].

 

19. Click [Electrode replacement].
  Clicking this will send the serial number entered in [New Electrode serial number] to the instrument. In addition, [Electrode usage time] will be reset to zero.

  NOTE: While the pH electrode usage time can be reset from the operation panel, you cannot enter the electrode's serial number.

  NOTE: After replacing the pH electrode, be sure to run a calibration before use.

  Click here for "(LC) Calibrating the pH Electrode".