HF scientific MicroTUV Online UV %Transmission Sensor/Sampler (large) - Manual (Page 18)

6.8 REPLACING SYSTEM TUBING
All the tubing in the system should be checked at least yearly for wear. A Tubing Kit (Part# 22887) is avail-
able which contains enough tubing to replace all the tubing in the system. To replace a length of tubing, turn
the pump off and remove the piece of tubing from the system by unscrewing the compression nuts at both
ends. Slide the nuts back onto the tubing and remove the inserts from each end of the tubing. Remove the
nuts, measure the length of tubing and discard the worn tubing. Cut a piece of new tubing the same length as
the worn tubing. Slide the compression nuts onto the tubing from each end so that the threads are facing
outward and push an insert into each end. Slide the compression nuts up to the inserts and screw the new
tubing in place within the unit. Dress the tubing into the unit as it was before. Turn the pump back on and
resume normal operation.
NOTE: The instrument may have to be restarted a few times using the push button on the power supply
module if it has lost its prime during this operatio
n.
6.9 SHUT DOWN PROCEDURE
If the TUV is to be shut down for any long period of time, such as for winter, follow the procedure below
to prepare the Sensor/Sampler enclosure for storage.
Run two cleaning cycles as described in section 6.1. Clean the T-strainer as in section 6.3. After flushing with
the Lime-A-Way, fill the bottles with clean water and flush the system with at least four bottles of clean water.
Disconnect the cleaning solution line and leave the quick connect open. Run the system to bleed the lines of
water.
Shut down all power to the system. Remove the cuvette and the 100%T solution. Disconnect the tubings to the
pump. Loosen the two pump head screws, then turn the pump head counterclockwise and remove. Store the
cuvette, 100%T solution and pump head in a safe place that is maintained at room temperature.
Before starting the system again, it is recommended that clean water be back-flushed through the source line
with a water hose to clean the source strainer and ensure that the line is clear. Check the drain line in the same
manner. Reinstall these lines, the cuvette, the pump head and the 100%T bottle. Start up the system as described
in section 3.2
7.0 TROUBLESHOOTING
7.1 GENERAL NOTES
Service and Technical Support are available from HF scientific, inc., 3170 Metro Parkway, Fort Myers, FL
33916-7597@ Phone (239) 337-2116, Fax (239) 332-7643
TUV (04/03) Page 10
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