Sample Probe Replacement
4D3700
(3D3 Instruments with Serial Suffix A through B and
4D3 Instruments with Serial Suffix A through D)
Reference: Use this instruction with replace-
ment part 4D3700.
Tools Needed: Phillips screwdriver; flat-
bladed screwdriver; soldering
iron and SN62, 2% silver,
eutectic, rosin-core solder;
probe alignment tool and
instructions (included).
CAUTION: Improper connections may
cause damage to the instrument.
Instruction:
1. Place an empty sample tube in the freez-
ing chamber to catch any extraneous
material that might fall in.
2. Turn off the power and unplug the instru-
ment.
3. Remove the two screws from the head
cover (A) and lift off the head cover.
4. Identify the probe leads where they con-
nect to the terminal strip (B). Snip off the
leads as close to the terminal strip as pos-
sible.
5. Loosen the probe setscrew (C) and gently
pull the probe down and out of the man-
drel, guiding the leads through the center
hole so that they do not catch.
6. Push the new probe (leads first) up
through the center hole of the mandrel. If
friction alone does not temporarily hold
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).
4DP700 Rev2
(4D35 Service Manual)
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C
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