HF scientific AccUView Wastewater UV %Transmission Monitor - Manual (Page 33)

The desiccant should be replaced when the instrument displays DESC. A new sealed
desiccant pouch and indicator card are available from HF scientific part #21555R. To
initially install or remove the old desiccant, simply unscrew the four corner thumbscrews
and remove the electronics half of the instrument. Open the bag protecting the new
desiccant pouch and replace (or install) immediately. To speed up the recognition, by the
instrument, of the new desiccant it will be necessary to reset the instrument by
disconnecting the sensor interconnect cable for 2 seconds and then reconnecting it.
Once the bag is opened, install the desiccant pouch immediately to prevent
premature degradation of the desiccant.
9.3 Replacing the Source Lamp
The UV source lamp in the AccUView Wastewater has a rated lamp life of about two
years under normal use.
Due to safety concerns it is recommended that the electronic service module be exchanged
- Part# 24669S. Whenever the UV source lamp requires replacement an economical
exchange program is available. Call the HF Customer Service Department for assistance.
9.4 Pump
The bellows pump is designed for long life. Generally little maintenance is required;
however, the check valves will occasionally require removal for cleaning. It is normal for
the bellows to discolor. The bellows life is rated for several years of operation. Contact HF
scientific if bellows replacement is needed.
9.5 T-Strainer
The T-strainer will require cleaning when full of debris. The cleaning period will be
dependent on the pump operation period and the amount of debris in the water. When the
level exceeds the visual area, the system should be placed into SERVICE mode (
SVC) to
prevent the pump from cycling. Pull the T-strainer out of the clip and hold over a bucket
to catch the water and debris. Rinse the T-strainer bowl and clean or replace the screen.
Ensure the bowl seal is replaced. After replacement, dry off any external moisture.
Change the operation mode to
AUTO to resume normal operation. Check for leaks.
9.6 Inlet Strainer
The inlet strainer prevents most of the solids from entering the system. Generally no
maintenance will be required as long as flow through the system is evident. If this strainer
clogs no sample water can enter the system. This strainer can be cleaned in two ways. The
best method is to pull it up and wash it off with fresh water. Where this is not practical,
back washing with fresh water can be performed. Do not apply high pressure to the tube as
it may rupture.
9.7 System Tubing Replacement
Although the internal system tubing should last a long time, an annual system tubing
replacement will ensure a reliable system. Inspect the condition of the tubing for any
evidence of deterioration. A replacement system tubing kit part # 24700S is available.
AccUView Wastewater (1/09) 27
Rev. 2.9