HF scientific MicroTUV Online UV %Transmission Sensor/Sampler (large) - Manual (Page 15)

6.1 SYSTEM CLEANING
CAUTION: Avoid getting air into the system. Avoid letting the source line come out of the
source water.
CAUTION: If the system is not immediately put back into operation after system cleaning, run clean
water through the system to flush out any remaining cleaning agents.
NOTE: For the following Steps use the Pump Switch to stop the pumping action, leaving the main
power switch ON. This prevents the system from cooling off.
Step 1 - With the Pump Switch OFF, undo the quick connect just to the left of the T-strainer by
pressing the metal button and pulling it apart.
Step 2 - Using the cleaning kit provided, insert the quick connect to the T-strainer connection.
Drop the suction tube into
6% Sodium Hypochloride. Turn Pump ON for 5 minutes.
Turn pump OFF and let stand for 5 minutes before proceeding to next step.
Step 3 - Insert the suction line into a source of clean water. Turn the Pump Switch ON and pump
for 5 minutes.
Step 4 - Insert the suction line into a solution of 50/50% Lime-A-Way ® and water. Turn the Pump
Switch ON and pump for 5 minutes. Turn pump OFF and let stand for 5 minutes before
proceeding to next step.
Step 5 - Remove the cleaning solution kit from the quick connect and reconnect the source line.
Turn the Pump Switch ON.
Step 6 - Restart the system at the controller or analyzer.
6.2 CUVETTE MAINTENANCE
It is recommended that the cuvette be checked
visually for clarity daily. Altough the instrument
compensates for build-up on the glass, the cuvette
will need to be manually cleaned from time to time.
To visually inspect the cuvette, remove the flow head
from the sensor by gripping it with one hand while
twisting the locking collar counter-clockwise with
the other. Pull the flow head out of the sensor and
observe the condition of the glass. If the cuvette
requires manual cleaning, place a cover over the
sensor top so that no moisture or foreign objects will
enter the sensor. Also, turn the pump off at the
WARNING: The use of safety glasses is recommended. Follow all safety procedures with
the chemicals in this procedure. (See precautions on M.S.D.S. data sheets)
The quartz cuvette supplied with the unit must be clean and free of all fingerprints. Cleaning is accomplished
by washing the interior and exterior of the cuvette in a mild liquid detergent solution (.5 ml/4L water). Then
rinse it thoroughly 8 to 10 times, in clean distilled water, to remove all streaks. To remove slime and scale
deposits, use diluted bleach to first remove slime and then use Lime-A-Way® to remove scale.
(NOTE: Dispose of in accordance with all applicable environmental regulations).
TUV(04/03) Page 7
REV. 0.6
pump switch before removing the cuvette from the flow head. To remove the cuvette, hold the flow head
with one hand while turning the cuvette counterclockwise by gripping it at the top only. Refer to Figure 2.
F i g u r e 2
Q u a r t z F l o w H e a d A s s e m b l y
Screw and unscrew the cuvette
by gripping fingers on this
surface only.
cuvette
Remove any moisture.
Do not touch glass with
fingers
flow head