iv
Figures and Tables
International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1
Furnace Core Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 10
HTPRT control probe and cutout thermocouple wire routing and heat pipe
ground wire placement.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 3
Attachment of thermocouples . . . . . . . . . . . . . . . . . . . . . . 15
Front Control Panel (cover door remove) . . . . . . . . . . . . . . . . 17
Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Controller Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Program mode setting actions . . . . . . . . . . . . . . . . . . . . . . 29
Proportional Band Settings. . . . . . . . . . . . . . . . . . . . . . . . 31
Serial Cable Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Digital Interface Command Summary . . . . . . . . . . . . . . . . . . 43
Digital Interface Command Summary continued . . . . . . . . . . . . 44
Digital Interface Command Summary continued . . . . . . . . . . . . 45
Metal Freeze Point Cell installed in canister . . . . . . . . . . . . . . . 48
Cell supported by stand. . . . . . . . . . . . . . . . . . . . . . . . . . 49
Cotton gloves MUST be used. . . . . . . . . . . . . . . . . . . . . . . 50
Preparing paper towel with reagent grade alcohol. . . . . . . . . . . . 51
Clean cell completely. . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Place insulation in re-entrant well. . . . . . . . . . . . . . . . . . . . . 53
Push insulation to bottom of re-entrant well. . . . . . . . . . . . . . . 54
Clean the basket thoroughly . . . . . . . . . . . . . . . . . . . . . . . 55
Place insulation in cell basket . . . . . . . . . . . . . . . . . . . . . . 56
Insure the insulation is flat at the bottom of the cell basket. . . . . . . . 57
21.6 x 14 cm (5.5 x 8.5 in) paper . . . . . . . . . . . . . . . . . . . . 58
Figure 20 Fiber ceramic paper installation. . . . . . . . . . . . . . . . . . . . . . 59
Figure 21
Insert cell into basket. . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Place fiber ceramic paper in cell basket. . . . . . . . . . . . . . . . . . 61
Fiber ceramic insulation installed on top of cell.. . . . . . . . . . . . . 62
Figure 24 Fiber ceramic paper pushed below cell basket top. . . . . . . . . . . . 62
Figure 25 Preparing basket assembly for installation in furnace. . . . . . . . . . . 63
Figure 26
Installing basket assembly in furnace. . . . . . . . . . . . . . . . . . . 64
Width of insulation placed on top of basket assembly.. . . . . . . . . . 65
Figure 28 Basket, insulation, and furnace lid installed . . . . . . . . . . . . . . . 66
Figure 29
Heat radiation guard installed. . . . . . . . . . . . . . . . . . . . . . . 67
Figure 30. Testing Uniformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74