Hanna Instruments HI 4003 Instruction Manual page 9

6. Holding the body of the electrode gently press upper
cap with your thumb. This permits the fill solution to
drain out of the body. Release cap and verify elec-
trode returns to its original position. (You may need to
gently assist for this to occur).
7. Tighten the electrode cap onto the body and fill elec-
trode body until fill solution volume is just below fill
hole.
8. Position electrode in a Hanna HI 76404 electrode
holder (or equivalent) and connect plug to meter.
9