Bio-Rad ChromLab™ Software User Manual
Page 221
pH Probe
Instrument Guide
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3.
Loosen the black collar on the pH probe.
4.
To remove the pH probe, lift the probe out of the pH flow cell.
Dispose of the probe in an appropriate waste receptacle.
5.
Add a small amount of water (2 ml) to the pH flow cell.
6.
Locate the replacement pH probe and remove it from the storage solution.
7.
Ensure that the pH probe cord is threaded through the collar.
8.
Inspect the probe to determine if the air bubble in the stem has moved into the
bulb area.
Tip:
If bubbles are visible in the bulb area, hold the electrode by the top
cap and shake it downward to move the bubbles into the stem.
9.
Carefully remove the plastic cap from the pH probe and ensure that the O-ring
is in place on the body.
Caution:
Use caution when removing the plastic cap so as not to damage
the glass probe.
10. Insert the probe into the top of the pH flow cell.
11. Slide the collar over the pH probe onto the pH valve and hand-tighten the collar
until it is snug.
Caution:
Do not overtighten the collar. Overtightening will break the glass
pH probe.
12. Connect the pH probe cable to the DNS connector on the pH valve module.
13. Restart the NGC instrument.
14. Calibrate the pH monitor. See
for more information.