CEM MARSXpress 10 mL, Руководство пользователя

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16 Cleaning and Inspection
CAUTION
Only the liners should be placed in the air oven at 180 ºC. Sleeves can be placed in an air oven no greater
than 105 °C. See “Sleeves” section for more detail.
DO NOT bake-out caps.
2.
Set the oven temperature to 180 °C and let the liners warm slowly. Do not exceed an oven temperature of 190
°C.
3.
Leave the liners in the oven for a minimum of 6 hours. Leaving them in overnight is acceptable.
4.
After the heating time is complete, turn the oven off and let the liners cool slowly back to room temperature
inside the oven.
5.
NOTE
It is important to let the liners cool slowly back to room temperature following the bake out procedure. Remov-
ing hot Teflon liners can lead to blistering on the inside if they cool too rapidly.
6.
Remove the liners from the oven. The liners should be white in color, comparable to new liners with no acid
history.
Sleeves
1. If water or acid gets on a sleeve, wipe it off with a damp paper towel and allow to dry. Never soak sleeves.
2. Inspect the sleeves.
• Sleeves should be smooth and golden brown.
• Discard sleeves that are distorted or flared.
• Discard sleeves that have stains on the ends. This occurs when liquid/acid wicks up into the composite
layers.
• Sleeves can be dried in 105 °C oven for 8 - 12 hours.
• If a sleeve becomes wet (submerged in liquid) discontinue use.
CAUTION
Never soak sleeves in water or detergent.
Remove the liner from the sleeve before adding acid or before pouring digested solutions out to prevent
liquid from wicking into the composite material.
Turntable
1. Keep the turntable clean and dry.
• Keep the fume hood, bench top, and microwave cavity floor mat clean. The turntable can pick up dust and
dirt on the white Teflon ball bearings when placed on the bench top or in the fume hood. It can also pick up
dust from the plastic mat on the floor of the microwave cavity. If the ball bearings accumulate enough dirt,
they will seize up and prohibit the turntable from rotating properly.
2. If ball bearings are dirty, use warm soapy water and a soft bristled brush to clean
• DO NOT remove the ball bearings from the track to clean.
3. If acid contacts the turntable, wipe it off with a damp paper towel and allow to dry.
4. Never soak sleeves.