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Page 97 of 105
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Use the supplied tweezers to remove the pan support; place the tweezers’ tips under
the pan support and pry the pan support straight up and out of the balance stem.
Be
careful; excess force on the balance can result in costly repairs.
•
Cover the pan support hole in the enclosure with masking or other similar tape.
•
Carefully mark the RTD with a permanent marker on the inside and outside of the
shroud and clamp to mark the relative RTD position in the heater.
•
Remove the shroud to provide the maximum cleaning benefit.
o
Remove the four (4) evenly spaced, small screws, located on the outside of the
shroud.
o
Carefully slide the RTD out of the shroud. Take care not to pull the RTD wires out
of the heater box while removing the shroud.
•
Lightly spray the shroud with cleaning solution and allow it to stand for several
minutes. Scrub with the stiff bristle brush. Repeat if necessary to remove layers of
accumulated buildup. Rinse under warm water and dry.
•
Before cleaning the rest of the test chamber, protect the heater elements by placing
paper towels around the elements.
•
Next, lightly spray the front (face) of the heater box and allow it to stand, or alternately
spray a damp cloth or paper towel with cleaner and use it to clean the heater box. Use
a small brush or cotton swab to remove excess buildup. Dry the interior of the test
chamber with paper towels or a cloth when clean.
Do NOT use a heavy spray of cleaner into the heater and/or shroud
area. Excessive moisture could affect wiring and its insulation.
•
Allow the heater elements and enclosure to dry for at least 15 minutes to ensure that
they are completely dry.
•
Reinstall the heater shroud and correctly position the RTD using the marks made with
the permanent marker.
•
Remove the masking tape from the pan support hole in the enclosure.
•
Gently but firmly install the pan support into the balance stem.
•
Run a weight test to verify that the instrument is functioning correctly (See section
on page
•
Perform a temperature calibration. (See
on page
11.4. Pan Support Cleaning
The sample pan support may need to be cleaned if volatile material condenses on it.
•
Turn the instrument off.
•
Use the supplied tweezers to remove the pan support; place the tweezers’ tips under
the pan support and pry the pan support straight up and out of the balance stem.
Be
careful; excess force on the balance can result in costly repairs.
•
Clean the support post and pan support arms by wiping with a soft cloth or paper
towel.
•
Gently but firmly install the pan support into the balance stem.
•
Ensure the arms of the pan support are all level and between 1.9mm and 3mm from
the balance cover. See section
inspection instructions.
