H.C Duke & Son 959R, Руководство оператора с иллюстрированным перечнем запчастей

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30 184981
DUKE Model 959R Soft Serve Freezer
10.3 Product Temperature
The product temperature should be mea-
sured by a calibrated thermometer. If you
suspect that the thermometer is out of
calibration, test it by filling a cup with ice
and water and inserting the thermometer
into it. After a few minutes, the thermometer
should read exactly 32°F (0°C).
The freezer should maintain a product
temperature variation of only 1.5°F (1°C) on
a product temperature of 18°F (-8°C).
As mix is being frozen in the freezing
cylinder, air is incorporated into the mix to
increase its volume, as well as enhance the
taste and appeal of the finished product. The
increase in volume is called
overrun.
Forty
five percent overrun means a volume in-
crease of 45% — 10 gallons of liquid mix
has become 14.5 gallons of finished product.
Controlled overrun is important in maintain-
ing consistency in product quality. Too
much overrun (air) results in a light, fluffy
product lacking the cold refreshing appeal of
a quality product. Too little overrun results in
a grainy, heavy product.
10.4 Overrun
To correctly measure the overrun, perform
the following steps:
1. Place an empty pint container on a
scale* and adjust your scale to zero.
2. Remove container from scale and fill the
container with liquid mix, even with the
top of the container, and record the
weight.
3. Now fill the container with frozen prod-
uct, being sure to leave no voids or air
spaces in the container.
4. Strike off the excess product so it is
even with the top of the container and
weigh.
5. Use the following formula to figure
overrun percentage:
“Weight of liquid mix minus weight of frozen
product/divided by the frozen weight. Multiply
by 100.”
10.5 Overrun Measurement
Example:
Weight of 1 pint of liquid mix = 18 oz.
Weight of 1 pint
frozen product
= 12 oz.
Difference = 6 oz.
6.0 oz. divided by 12 oz. = .5
.5 x 100 = 50% overrun
* A scale (P/N HC158049) that is gradu-
ated in overrun percentage can be
purchased from H. C. Duke & Son.
On the next page is an overrun
chart that shows the net weight of
one measure pint of frozen “Dairy
Queen” product in grams and
ounces, and their corresponding
percentage of overrun.