Watts HF scientific 28030, Owner'S Manual

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CLX-XT (28652) Page 30
REV 5 (5/2020)
10.0 Routine Maintenance
10.1 Maintenance Schedule
The recommended schedule is shown below. It is important to replace the reagents to get
reliable accurate readings from the CLX-XT. The Buffer supplied can last for up to one
year*. Each mixed indicator reagent will last for up to 90 days* when kept in cooling
chamber. The one year kit includes one buffer bottle and four sets of indicator reagents. A
convenient mounting clip for the indicator reagent box is located in the lower left corner
of the cabinet. The Buffer reagent mounts above the indicator reagents in another clip and
is further held with a Velcro strap. See section 10.2 for more information on the reagents.
The CLX-XT is shipped with one CLX-XT Tubing/Cuvette kit, HF part # 09950XT. The
kit consists of the following:
Qty Part
1 Spare Buffer Cap Assembly
1 Spare Indicator Cap Assembly
8 Pump Tubes
1 Spare Cuvette
Two replacement sets of reagent cap/tubing assemblies are supplied with the CLX-XT;
one for the buffer and one for the indicator.
Additional kits can be ordered from your local HF scientific distributor or representative.
It is recommended to keep one kit on hand at all times.
Generally, both pump tubes should be replaced annually. Spare cap assemblies for both
the buffer and the indicator are supplied and can be replaced when needed.
Every 30 days
1. Check for leaks and proper operation of the instrument in general.
2. Check the T-strainer for debris. Clean if needed.
3. Check the cooling chamber operation using a non-contact IR thermometer. This
should be 25°C or lower.
Every 90 days
1. The indicator reagent required for operating this instrument must be changed at least
every 90 days. The buffer reagent can be used up to one year.
2. The internal strainer should be checked and cleaned if necessary.
3. The glass cuvette should be inspected. Check for excessive debris on the inside
surface of the glass. It is suggested to keep a spare cuvette to replace when required.
The old cuvette may be cleaned, if possible, for future replacement.
Flushing the System
Press the SERVICE button to stop the water flow. Remove old reagents and discard. Place
the suction tubes in a small container of clean water. Press SERVICE to return to
operation mode, press PRIME and then

to flush the system with water. Remove the
suction tubes from the water Press PRIME and then

to remove most of the water.