Block Probe Replacement Kit: Models 3D3/4D3
4D3340
Reference: Use this instruction with replace-
ment part 4D3340.
Tools Needed: Phillips screwdriver, flat-
bladed screwdriver.
Warning-Hazardous Voltage
Warning-Internal components may
be damaged by static electricity.
CAUTION: Improper connections
may cause damage to the instrument.
Instruction:
1. Turn off the power and unplug the instru-
ment.
2. Remove the screws securing the instru-
ment cover, and remove the cover (see
below):
The following instructions refer to 4D3
cryoscopes with suffix "A" or later, and
to all 3D3 osmometers:
a. Remove the two sets of screws from
the side panels and the two screws
from the rear panel.
b. Slide the instrument cover up and off.
The following instructions refer to 4D3
cryoscopes without a suffix:
a. Remove the heat transfer fluid from
the front cover.
b. Remove the two screws from the rear
panel of the back cover and lift off the
back cover.
c. Remove the four screws from under-
neath the front cover, lift the front
cover slightly up and then slide it for-
ward and off.
3. Remove the four screws from the deck
(A), and remove the deck.
Note: If you have a 4D3 cryoscope with no
suffix, there are seven screws on the
deck that you must remove.
4. Disconnect the block probe from the main
circuit board.
5. Remove the cable clamp screw and the
cable clamp that secures the block probe
cable to the heatsink.
6. Notice the length of probe cable as you
remove it from the block. Cut any tie
wraps used to create the service loop, and
then remove the block probe cable from
the Cooling Assembly.
7. Insert the tip of the thermal grease appli-
cator all the way into the block probe
hole (B). Inject grease into the hole
while slowly withdrawing the tip, so that
there are no air pockets. Fill the hole
For additional information or technical assistance,
please contact Advanced Instruments Hot-Line
®
Service Center (U.S. 1-800-225-4034, outside
North America +US 1-781-320-9000).
4SP340 Rev3
(4D35 Service Manual)
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