Ph Sensor - Emerson Rosemount FCL-01 Reference Manual

Reference Manual
00809-0200-3412
9. Hold the sensor at about a 45° angle with the cathode end pointing up.
10. Add electrolyte solution through the fill hole until the liquid overflows.
11. Tap the sensor near the threads to release trapped air bubbles.
12. Add more electrolyte solution if necessary.
13. Place the fill plug in the electrolyte port and begin screwing it in.
14. After several threads have engated, rotate the sensor so that the cathode is pointing
15. Place a new O-ring in the groove around the cathode post.
16. Cover the holes at the base of the cathode stem with several drops of electrolyte
17. Insert a small blunt probe, like a toothpick with the end cut off, through the
18. Gently press the probe against the bladder several times to force liquid through
19. Place a drop of electrolyte solution on the cathode; then place the membrane
20. Screw the membrane retainer in place.
9.3

pH sensor

9.3.1 pH sensor maintenance
When used in clean water, the pH sensor requires little maintenance.
Generally, the sensor needs maintenance when the response becomes sluggish or noisy.
In clean water, the typical cleaning frequency is once a month. In water containing large
amounts of suspended solids, for example, open recirculating cooling water, cleaning
frequency will be substantially greater.
9.3.2 Clean the pH sensor
Procedure
1. Remove soft deposits by rinsing with a stream of water from a wash bottle.
Rosemount FCL 56
b) Fill the cup with electrolyte solution.
c) Wait for the wooden ring to soak up the solution.
This usually takes several minutes.
up and continue tightening the fill plug.
Do not overtighten.
solution.
pressure equalizing port.
NOTICE
Equipment damage
A sharp probe may puncture the bladder and destroy the sensor.
Do not use a sharp probe.
the holes at the base of the cathode stem. Keep pressing the bladder until no air
bubbles can be seen leaving the holes.
Be sure the holes remain covered with electrolyte solution.
assembly over the cathode.
Maintenance
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