4DP700 Rev2
(4D35 Service Manual)
Page 2 of 2
the probe in position, slightly tighten the
probe setscrew to provide just enough
friction to allow precise final adjustment.
7. Use the probe alignment tool and instruc-
tions to properly position the probe and
stir/freeze wire.
8. When the probe is in the position
required, tighten the probe setscrew just
enough to firmly hold the probe, but not
crack or distort the thin plastic wall of the
mandrel.
9. Use SN62, 2% silver, eutectic, rosin-core
solder to make the new connections at the
terminal strip. These connections are crit-
ical, so be sure to use good soldering
techniques.
10. Arrange the probe leads so that they will
not touch the clapper or be pinched by the
head cover, and replace the cover.
11. Plug in the power cord and turn on the
instrument.
12. Set the sample bin number (see the fol-
lowing procedure).
13. Calibrate the instrument. (Recalibration
is required each time the sample probe is
replaced.)
Set Sample Bin Number
1. If there is a Supervisor/Operator
keyswitch, turn it to the Supervisor posi-
tion (if required).
2. Press TEST. Press < or > to select
“Probe Bin Test”, and then press
START.
3. Place a sample of Probe Bin-Setting Fluid
into the freezing chamber.
4. At “[START] Ready?”, press START.
5. At the end of the test, record the sample
probe resistance and the bin number, and
then press STOP. The display will
change to “Probe Bin Test”.
To set the correct sample bin number, fol-
low steps 6-8.
If the current sample bin number matches
the number just recorded, press STOP
twice to exit the menu.
6. Press SETUP. The Supervisor/Operator
keyswitch must be in the Supervisor posi-
tion.
Note: If you have a 4D3 cryoscope with a
suffix before “C”, the menu item “Set
Sample Bin #” is within the TEST
menu, not the SETUP menu.
7. At “Select Setup Item”, press < or > to
select “Select Sample Bin #”, and then
press START.
8. If the current sample bin number is not
the same as the one recorded in step 5,
enter the correct number, press ENTER,
and then press STOP twice to exit the
menu.
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