GF Signet 4632 Chlorine Dioxide Analyzer System - Manual (Page 36)

36 463X Chlorine System Manual
Appendix
It is required to calibrate the sensor after servicing the
membrane and electrolyte. See Page 24.
Verifying the sensors accuracy using the DPD method
should be performed to determine if the sensor requires
maintenance.
1. Inspect the membrane for dirt or damage. Replace the
membrane if its torn or if the gold cathode is visible.
2. If the membrane is dirty clean the membrane by soaking it
in 1 - 5% HCL and gently washed with a stream of DI water.
(do not use any mechanical device on the membrane)
• If a fresh water rinse does not clean the membrane,
it will need to be replaced.
• Keep spare membrane caps available.
Membrane caps carry no warranty.
Re¿ ll Procedure:
When adding electrolyte, be prepared for an accidental spill.
Working near a sink is recommended.
1. Remove the membrane cap from the front of the sensor.
2. Turn the sensor upside down and shake the sensor
vigorously to remove the internal electrolyte.
3. Fill supplied syringe with electrolyte solution.
Additional caution should be taken when handling Chlorine
Dioxide electrolyte solution.
4. Place the electrode on a level surface.
5. Insert syringe needle fully into one of the eight electrode
holes while injecting with electrolyte solution. Slowly
injecting the electrolyte solution into the sensor to avoid
introducing air bubbles. The electrode holds
approximately 14 milliliters of solution. Slowly ¿ ll until
solution begins to À ow out of holes. Do not allow the
solution to run down the electrode and wet the electrical
contacts in the DryLoc connector.
6. Slowly screw on the membrane cap ¿ nger tight.
Do not use tools.
To avoid damage and contamination, do not touch
the white membrane surface on the membrane cap.
Diluted HCl can irritate the eyes and skin,
use proper safety equipment.
Do not use surface tension reducing chemicals,
detergents or solvents on the membrane.
Avoid skin or eye contact with electrolyte
solution. Wear rubber gloves and goggles.
* Material Safety Data Sheets (MSDS) are
available online at www.gfsignet.com.
Maintenance - 2630 Free Chlorine Electrode
Maintenance - 2632 Chlorine Dioxide Electrode
Storage
If the sensor or panel assembly is to be removed from
service for a period of time the sensor must be properly
prepared for storage and may need to be recommissioned. Store electrode between -10 ºC to 60 ºC
(-4 ºF to 140 ºF) at a relative humidity that
does not exceed 95%.
The primary concerns when storing the
electrode is membrane dehydration and
freezing in extremely cold environments.
DO NOT
FREEZE
1 week or less:
•
Close the drain valve, then close the inlet valve of the
À ow cell, to maintain water inside the À ow cell to keep
the membrane wet.
• If draining the À ow cell is required, remove the sensor
from the cell and the 2650 electronics and store in the
shipping bottle with tap water added.
Continue to Page 37 for additional storage periods
Storage Periods:
CAUTION:
DO NOT touch the gold tip or
the membrane of the sensor.