Advanced Instruments 4C3 - Page 94

“Press START to Continue” scrolls across the display.
h. Always check and re-adjust the stir/freeze amplitude, as neces-
sary, after aligning the probe and/or stir/freeze wire (see item
6).
6. Stir/Freeze Amplitude Adjustment
The stir and freeze vibration amplitudes are affected by the probe,
stir/freeze wire and mandrel positions. Always re-align the stir/
freeze wire according to the recommendations in item 5 before
checking and adjusting the freeze and stir vibration amplitudes as
follows:
a. With the 4C3 power turned on and “Press START to Continue”,
“Cryoscope Ready” or the date and time on the display, open
the cassette deck cover (see figure 3) and observe the position
of the operating head, which should be in standby position with
the probe and stir wire slightly behind the probe wipers (see
figure 5). If the operating head is not in this position, remove
all cassettes from the cassette decks and press START; the 4C3
should re-position the operating head so that the probe and stir
wire are behind the probe wipers and report “No Cassette”.
b. Manually move the operating head to the sample-tube pickup
position shown in figure 5.
c. Make sure the supervisor/operator keyswitch is in the
Supervisor position while using the test and setup menus (see
figure 5 and Chapter 1).
d. Press the TEST button. If the Supervisor/operator keyswitch is
in the Supervisor position, the display will change to “Select
Test Item”.
e. At “Select Test Item”, press the START button. The display
will change to “Test Menu #: 0”.
f. At “Test Menu #: 0”, press the 2 button; then press ENTER.
The display will change to “Stir/Freeze Test”.
72
The Advanced
®
Model 4C3 User’s Guide