FSII actually used to inhibit the fuel tested is not available to
determine the F factor, the following formula should be used to
determine FSII results:
%FSII = 0.1614 (2.000 - VTNT)
VT = milliliters of sodium thiosulfate solution, and
NT = normality of sodium thiosulfate solution.
(12) Utility Oven.
(a) Description. The utility oven (24, fig. 1-4) is
permanently mounted on the countertop. It produces heat ranging from
ambient to 200 degrees C (392 degrees F) and is used for baking, dry-
ing, conditioning and preheating. The cabinet-type, gravity-
convection oven is equipped with dual hydraulic (safety) thermostats,
two latticed metal shelves, hinged door with safeyty latch, adjust-
able ventilator, pilot lamp, ON-OFF toggle switch and a mercury-in-
glass thermometer ranging from 0 degrees C to 200 degrees C (32
degrees F to 392 degrees F).
Operate the utility oven
(b) Operating Instructions.
1. Insert the thermometer through the top of the
shutter cap. Lower the thermometer bulb into the heating chamber as
required, depending on type of thermometer used, to ensure a correct
temperature reading. When possible, use only one shelf and leave
ample space between objects for proper air circulation and maximum
heat transfer. Never place materials on the oven floor or below the
lowest shelf position. Shelves should not be overloaded, and should
never be loaded from wall to wall.
The exhaust vent shutter cap must be open during
2. Turn the line switch to ON. Reference points
on the temperature control knob do not correspond with actual temper-
ature settings. Temperature readings must be taken from the thermo-
meter. To raise the temperature, turn the temperature-control knob
clockwise until the pilot lamp indicates that heaters are on. Turn
the knob counterclockwise to lower the tempterature. It may be neces-
sary to back off slightly to take up lost motion in the thermostat
mechanism, when turning temperature-control knob.