User Guide

Instruction Manual DO 100

10. Using the installation tool, screw the membrane

lock back into the cap. Tighten the lock firmly over

the membrane and O-ring, but do not over tighten.

11. Inspect the membrane for wrinkles. If wrinkles

exist, remove the membrane and repeat steps 8 –

11.

12. Fill the membrane cap with water and inspect the

bottom for leaks. If water drops are leaking from

the membrane, re-seal the membrane on the O-

ring (repeat steps 8 – 11, for membrane

replacement only).

13. If the assembly is leak-free, empty the water and

fill the membrane cap with electrolyte to the brim.

14. Tap the side of the housing gently to remove any

air bubble that may be sticking to the membrane.

15. Screw the cap onto the probe. Excess electrolyte

will drain out.

16. Replace probe guard.

17. Calibrate the probe (see section 4) after the %

saturation readings have stabilised.

NOTE

Membranes can only be used once. When a

membrane cap is screwed onto the probe, the

membrane is stretched by the cathode. If the same O-

ring and the membrane is used a second time it will not

fit perfectly onto the cathode. This will result in erratic

readings.

Figure 36: Parts of electrode

showing O-ring, membrane & lock

Open

Installation tool

Insert installation

tool into slots on

membrane lock.

Then unscrew

membrane lock

from membrane

cap

Figure 35: Use Tool to take out (or put in)

membrane