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Cleaning / Maintenance of System
Cleaning of Vessels
The quartz and Teflon
®
vessels may be washed in a lab dishwasher or soaked overnight in diluted HNO
3
. The quartz outer support of the
Teflon
®
vessels may be washed in the dishwasher or soaked in acid. All vessels should be dry prior to its use in the microwave. Quartz vessels
that show cracks or chips must not be used.
Cleaning of Teflon
®
Liners, Caps and Safety Pressure Caps
Teflon
®
caps should be replaced when they show signs of wear. To determine if the Teflon
®
cap is overused: Place the Teflon
®
cap on the
quartz tube and if the bottom portion of the top ring of the cap touches the tube, the cap should be replaced. The caps may be soaked in 5%
or 10% HNO
3
solution over night., Then rinsed in distilled water and dried in an oven at 103 for a a few hours or over night.
Pressure
Safety Caps have been calibrated to appropriate settings at the factory. Calibration settings of the Safety Pressure cap can only be adjusted at
the factory. They can be validated in the field with our Field pressure testing unit. It is highly recommended that Safety Caps be tested every 6
months.
Safety Pressure Cap can be calibrated only by SCP SCIENCE’s trained service personnel.
Cleaning the Cavity
Under normal operating conditions, if a tube vents during the digestion, the fumes are typically whisked away by the exhaust blower. If the rack
is wet when it is removed from the cavity, then inside of the cavity should be checked and wiped dry with a dry paper towel while wearing the
appropriate safety gloves and safety glasses.
If a vessel has accidently ruptured in the cavity, carefully remove the broken quartz parts by hand. The liquid may be cleaned up with a paper
towel, then damp wipe the inside of the cavity. The cavity has been coated with Teflon
®
.
Always wear safety gloves and safety glasses when cleaning a wet cavity.
Wear appropriate safety gear if the tube has vented or cracked while using HF.
Cleaning the screen of the Controller
Wipe with a clean damp cloth to remove fingerprints and dust monthly.
The system has not been tested with perchloric acid. It is not recommended to use perchloric acid.
CAUTION
WARNING
WARNING
