20
11.3 Indicator Reagent Preparation
Remove the cap of the small liquid indicator reagent and add the
contents of the DPD powder bottle (small brown bottle). Cap and shake
to fully dissolve the powder.
NOTICE
Once mixed the indicator has an expected life of 90 days if kept
in the powered cooling chamber. Write the mixing date on the
reagent bottle labels in the area provided. Dispose of expired
reagents correctly.
To replace the reagents, press the
SERVICE
button; this will empty the
cuvette and stop any flow of water. Remove the cap on both bottles
replace with the cap supplied with the CLX-Ex. The buffer is installed
on the left and the indicator is installed in the cooling chamber. The
suction tube for both reagents will reach the bottom of the bottles.
To complete the replacement procedure, press the
PRIME
button
and then the
button. This will draw enough of each reagent to
completely prime the tubes and replace any old solution. The system
will automatically return to normal operation after it has primed.
NOTICE
Use caution when changing the reagents as they are corrosive.
These reagents may stain clothing. After changing the reagents,
operators should wash their hands.
11.4 Check Valve Flushing Kit
Sometimes upon initial commissioning, the check valves stick
and require manual priming. This should not be needed after
commissioning. Be careful when using this kit to use only chlorine free
water. Complete instructions are included in the kit.
Figure 6: Check Valve Flushing
11.5 Instrument Storage
If the CLX-Ex is relocated or will be inactive for long periods
of time (several months), remove the reagents. Flush the
reagent system as describe in 11.1
Maintenance Schedule
.
Place the instrument in Service mode to drain the system
then remove power by disconnecting the mains power plug. It is usually
a good idea to disconnect or shut off the source water.
11.6 Cleaning the CLX-Ex
Flush the system as mentioned in section 11.1
Maintenance
Schedule
. When the flushing is finished, press the SERVICE
button wait until the display reads HOLd.
As a matter of safety, always disconnect any power source
to the CLX-Ex prior to attempting any cleaning. It is recommended that
the source water is also shut off.
Isopropyl alcohol (rubbing alcohol) on a soft cotton cloth works very
well in removing reagent stains from plastic parts, the key pad and the
display. Use care when cleaning around electrical components. Do
not use any harsh cleaning agents as these may cause damage to the
instrument components.
Ensure that the system is dry prior to applying power.
