Cleaning The Sensor (Brush Washing) ・・・・・・・・・・・・・・ Page; Cleaning The Filter ・・・・・・・・・・・・・・・・・・・・・・・・・・・・ Page - Fellow Kogyo FOCAS-2000 Instruction Manual

Page. 31
Maintenance and Checking
8
.
Cleaning the sensor (brush washing)
8-4.
It is recommended to periodically clean the inside of the detection tube in the sensor unit to enjoy its performance for a long time.
Clean the detection tube once per 2 weeks or per 10 measurements whichever comes first.
Be sure to turn off power to the oil concentration detector (FOCAS-2000) before starting sensor cleaning.
Carefully clean the sensor unit and the inside of the detection tube.
Use a dedicated cleaning liquid. * Never use any organic or alcoholic solvent.
Immerse the dedicated washing brush in water until it fully becomes soft before using it.
After the cleaning process is completed, wash the dedicated washing brush with water containing neutral detergent,
rise the brush fully with fresh water (to remove the detergent), and store it in a clean place (with the brush body fully
immersed in mineral water or dedicated washing liquid).
Check and make sure the O ring is fitted to the upper lid when closing the upper lid. Without the O ring, a water may
leak from the upper lid.
When finding a water leak from the upper lid while the oil concentration detector is running, immediately stop the oil
concentration detector and firmly tighten the upper lid.
Upper lid
Sample water
Loosen
Detection tube
O-ring
Cleaning procedure
1. Prepare the dedicated washing liquid and washing brush.
2. Be sure to immerse the washing brush in water to soften it and remove excessive water from the brush.
3. Turn off power to the oil concentration detector, close the sample water valve and the fresh water inlet
valve, and remove the upper lid.
(Use an adjustable wrench or the like to open the upper lid if it is too hard to open.)
4. Open the drain port (in the sensor unit), drain the sample water detection tube, and close the drain port.
5. Feed the washing liquid to 80% of the detection tube.
6. Wash the inside of the detection tube by moving the washing brush up and down and turning the brush.
Wash the inside wall of the detection tube by turning the brush along the wall surface a shown right.
7. Open the drain port, drain water from the detection tube, and close the drain port.
Feed mineral water to 80% of the detection tube, open the drain port, drain water from the sample water
detection tube, check and make sure the drain seal washer is fitted to the drain, and close the drain port.
8. Turn on power to the oil concentration detector, manually operation the oil concentration detector by using
mineral water according to the manual running procedure (see " 8-1-1 Manual running"), and make sure
"Warning: cell too dirty" is not displayed. When the warning is displayed, repeat manual washing, sensor
cleaning, and manual running (see 8-1-1), and check whether the detection tube is clean.
9. Open the upper lid, check the state of the upper part of the detection tube and the O ring of the upper lid.
Wipe off stain or dust (if any) on the O ring with clean waste cloth. Firmly fasten the upper lid by your
hands. (Firmly fasten it by your hands. You need not use an adjustable wrench or the like.)
10. Open the sample water valve and the fresh water inlet valve (to the original positions).
11. Feed fresh water according to " 8-2-1 Manual washing (Washing press Enter)" and end the manual
washing.
Cleaning the filter
8-5.
Clean the filter when "Warning: cell too dirty" is frequently displayed when the oil concentration detector is running or at the end of running.
The filter should be cleaned about every 3 months.
When the water supplied from the sample water inlet contains high concentration of oil or contaminants or when
industrial water or circulating reclaimed water is supplied from the fresh water inlet, the filter may be clogged with oil
film, contaminant, and/or dust and will lose its performance. If the filter is clogged too much, oil concentration detector
operation will be disabled.
Sample water filter body Fresh water filter body
Sample water seal washer
Sample water filter
Drain
(Sensor drain port)
Drain seal W
Fresh water seal washer
Fresh water filter
Loosen
Washing brush
Wash the inside of the detection tube by moving the
washing brush up and down and turning the brush.
Filter cleaning procedure
1. Close thesample water inlet valve and the fresh water inlet
valve respectively to the OFF position to stop water supply.
2. Rotate and remove the filters by using an adjustable wrench.
3. Clean each filter with a soft plastic brush and neutral
detergent solution.
4. Rinse each filter fully with water.
5. Remount the filters.
Washing brush