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When setting the base value, be doubly sure of your num-

ber, scale, and mathematics. For example, as indicated in the

Foreword, the average freezing point of cows milk in the U.S.A.

has been found to be around -540 m°H, which converts to -522

m°C. If ”522” is used when the “Set % DFB” requires Celsius,

the current -525 m°H AOAC confirmation level should indicate

“3% DFB” (3% difference from base). However, if ”540” is

used by mistake, a false indication of 6% will be obtained.

b. When the base is set as required, press ENTER to save the set-

ting and return the display to “Set % DFB”.

Note that pressing stop at that point, instead of enter, would

have canceled the new setting and restored the previous setting.

At “Set % DFB”, you may want to repeat the setting sequence

to make sure the desired base reading has actually been record-

ed.

c. At “Set % DFB”, press stop to return the display to

“Cryoscope Ready”.

When any non-zero base is set, every sample test result will

be displayed with a % DFB value. When the base is set to 0,

no % DFB will be displayed. Thus, if you wish to eliminate

the % DFB display, simply press the clear button at “Base

Reading = xxx mC” (or xxx mH) or set the base value to 0,

then sequentially press enter and stop to return the display to

“Cryoscope Ready”.

13. Select Display mH/mC

This menu item enables changing the readout temperature units (see

the Foreword for a discussion of the units of measurement used for

milk cryoscopy).

CAUTION Changing this setting requires changing the % DFB

setting (if not set at zero), as well. (See Set % DFB.)

The Advanced

Model 4C3 User’s Guide

Advanced Instruments 4C3 User Manual

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