AccUView LED (1/2020)
Rev 2
27
9.0 Routine Maintenance
9.1 Cleaning the Flow Through Cuvette
Measurement cuvettes used for the flow through should be clean and free of marks or
scratches. Cleaning is accomplished by cleaning the interior and exterior with a detergent
solution and then rinsing several times with distilled or de-ionized water. The cuvette can
be replaced by first shutting off the flow using the provided shutoff clamp; unscrewing the
old cuvette and replacing with a fresh clean one. Recalibration will be required for
accurate operation.
Ensure this cuvette is tightened to the flow through before each operation. After a
cuvette it is recommend that the water be run with the flow through not installed to
allow for inspection of the seal.
9.2 Replacing or Installing the Desiccant Pouch
The AccUView LED continuously checks the condition of the desiccant. When the
desiccant gets in such a condition that it may cause problems, the instrument will display
DESC
on the lower portion of the display to indicate the presence of humidity.
Proper use of the supplied desiccant is essential in maintaining the performance of the
instrument. The desiccant has been designed to have a long life; however, replacement
of the desiccant pouch will be required from time to time.
It is essential that the enclosure seal on the instrument base be maintained to ensure
adequate desiccant life. Inspect the seal each time the desiccant pouch is replaced. Replace
or reseat the seal if it is found to be defective.
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 LED
The UV source lamp in the AccUView LED has a very long life, but is dependent on the
setting of the Duty Cycle and operating conditions. See section 7.14
for more information
on the LED life
When the UV source LED requires replacement it can easily performed but it does require
opening the enclosure. Contact the factory before servicing. Alternately another service
module can be purchased. Call the HF Customer Service Department for assistance.
