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3250 Design Changes Advanced
™
Osmometer 3250/Cryoscope 4250 Service Manual
Dimensions inches centimeters
Width: 13 32
Depth: 18 46
Height: 16 41
Weight pounds kilograms
Net: 23 10
Shipping: 34 14
Warranty: One-year limited warranty on workmanship and all parts except
glass, plastic and parts warranted by their makers.
Certification:
98214
Refer to Regulatory Notices for applicable standards.
Installation Class: I
Over-Voltage Category: II
Pollution Degree: 2
Moisture Protection: IPX0 (Ordinary)
3250 Design Changes
The serial number suffix indicates the revision of the instrument. The chart below lists the
major changes made at each revision of the 3250 Osmometer.
Model 3250 Osmometer Description
Serial Suffix ‘A’
January 2004
Original model released.
Serial Suffix ‘B’
May 2007
Base chassis and cover redesigned.
Serial Suffix ‘C’
October 2007
Up/Down relay PC boards redesigned into a single RoHS-compliant PC
board.
Serial Suffix ‘D’
September 2009
**MAJOR REVISION**
AC head motor and supporting components replaced with a DC stepper
motor, multi-driver PC board and power supply, Seiko thermal printer
assembly with thread-through paper loading and supporting components
replaced with a Citizen thermal printer assembly with easy-load paper
loading.
Serial Suffix ‘E’
October 2010
Application board redesigned to power display and keypad LEDs from VCC
+5 VDC line. Main harness redesigned.
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