Endress+Hauser CCS50D Operating Instructions Manual page 34

Maintenance
5. Screw membrane cap back onto sensor →  34.
9.2.2 Filling membrane cap with fresh electrolyte
Please note the information on the safety data sheet to ensure safe use of the electrolyte.
NOTICE
Damage to membrane and electrodes, air bubbles
Possibility of measured errors to complete failure of the measuring point
‣
Avoid damage to membrane and electrodes.
‣
The electrolyte is chemically neutral and is not hazardous to health. Nonetheless, do not
swallow it and avoid contact with eyes.
‣
Keep the electrolyte bottle closed after use. Do not transfer electrolyte to other vessels.
‣
Do not store electrolyte for longer than 2 years. The electrolyte must not be yellow in color.
Observe the use-by date on the label.
‣
Avoid air bubbles when pouring electrolyte into membrane cap.
Fill membrane cap with electrolyte
1. Remove membrane cap →  35.
2. Pour approx. 7 ml (0.24 fl.oz) Fill the membrane cap with electrolyte until it is level
with the start of the internal thread.
3. Slowly screw on membrane cap up to the stop . This will cause excess electrolyte to be
displaced at the valve and thread.
4. If necessary, pat the sensor and membrane cap dry using a cloth.
5. Reset operating hours counter for electrolyte on transmitter. For detailed information,
see Operating Instructions for transmitter.
9.2.3 Replacing membrane cap
1. Remove sensor from flow assembly →  32.
2. Remove membrane cap →  35.
3. Pour fresh electrolyte into the new membrane cap until it is level with the start of the
internal thread.
4. Check if the sealing ring is mounted in the membrane cap.
5. Screw new membrane cap onto sensor shaft →  36.
6. Screw on membrane cap until the membrane at the working electrode is slightly
overstretched (1 mm (0.04 in)).
7. Reset operating hours counter for membrane cap on transmitter. For detailed
information, see Operating Instructions for transmitter.
34
CCS50D
Endress+Hauser