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G-1 Checklist for Visiting RRS Labs General â All Furnaces ⢠Check cleanliness of furnaces. â Is there a lot of build-up in chamber? â How often is the chamber cleaned? ⢠Check default criteria to see if they have changed anything. ⢠Check exhaust setup, length of ducts, elbows. ⢠Do they check the internal scale before each test? Total mass should be within 5 g of external mass. ⢠Check resistance of heating elements. ⢠Check how often they have furnace calibrated. ⢠How long do they generally wait before weighing the sample after completion of the test? Do they have an in-house rule for this, or just weigh whenever they get a chance? ⢠Do they generally use 538°C, or do they use lower tempera- ture? (Burn profile for Troxler?). ⢠Check baskets. How clean are they? Are they heavily worn? Thermolyne Furnaces Only ⢠Check filter set point. ⢠Check their cut-off limit (0.01%?). ⢠Perform lift test. Do they do this regularly? ⢠To check criteria, hold down âEnterâ while turning unit on. Troxler Furnaces Only ⢠When they do the furnace cleaning, do they also physically vacuum out the side as stated in ownerâs manual? Though this may be omitted. ⢠What burn profile do they generally use? ⢠Look at burn profiles. Have they altered them at all? Gilson Furnaces Only ⢠How do they determine how long to burn the sample the first time? Do they use experience from previous mixes, or do they have a set time? Do they determine this during design/correction factor determination before mixes are actually produced? ⢠How many times do they generally have to put the sample back in before itâs determined to be complete? Do they go by visual clues only, or weight? ⢠How long do they let the sample sit out of the furnace before checking the weight to see if the mass has not changed? A p p e n d i x G Checklist for Troubleshooting Laboratory Visits
G-2 Checklist Test Result and Comments Lift Test Scale Mass Check @ 500 g Scale Mass Check @ 2,000 g Get Printout with Set Criteria Chamber Condition Baskets Condition Exhaust Setup Heating Elements Resistance Measure Chamber Temp. with Probes Results RRS Average Results _________Lab Average NCAT Tests at Lab RRS Average Results _________Lab Average NCAT Tests at Lab Notes:
