Advanced Instruments 3900 User manual

3905SM Rev14 050415
The Advanced®Osmometer
Model 3900
Service Manual

3
1. Introduction
Specifications . . . . . . . . . . . . . . . . . . . . .7
General Description and Purpose . . . . . .8
The Service Manual . . . . . . . . . . . . . . . .8
Service Assistance . . . . . . . . . . . . . . . . .8
Safety/Regulatory Information . . . . . . . 9
Symbol Conventions . . . . . . . . . . . . . . . 9
General Cautions . . . . . . . . . . . . . . . . . . 9
Service & Maintenance Cautions . . . . .10
Hazardous Material Cautions . . . . . . . .11
Regulatory Notices . . . . . . . . . . . . . . . .11
Symbol Conventions . . . . . . . . . . . . . .11
2. General Overview
Circuit Diagram . . . . . . . . . . . . . . . . . .15
Circuit Description . . . . . . . . . . . . . . . .16
Power Supply . . . . . . . . . . . . . . . . . . . .16
Sample Cooling Assembly . . . . . . . . . .16
4C3600 Main Board Description . . . . .16
Head Transition Board Description . . .16
Head Up/Down Sensor
Board Description . . . . . . . . . . . . . .17
Motor Control Board . . . . . . . . . . . . . .17
Motor Control . . . . . . . . . . . . . . . . . . . .17
Sensors (Magnetic) . . . . . . . . . . . . . . . .17
Cassette/Stat Tube Detectors . . . . . . . .17
Cassette Index Sensor PCB . . . . . . . . .17
Cooling Reservoir Assembly . . . . . . . .17
Serial Communication Port . . . . . . . . .18
Head Rotation System . . . . . . . . . . . . .18
Replacement Parts . . . . . . . . . . . . . . . .19
Supplies & Accessories . . . . . . . . . . . .19
3. Maintenance
Maintaining the Instrument . . . . . . . . .23
Storage and Shutdown . . . . . . . . . . . . .24
4. Troubleshooting
Component Checks . . . . . . . . . . . . . . . .27
Cooling Reservoir Assembly . . . . . . . .27
Head Up/Dn, Rotate and
Cassette Index Motors . . . . . . . . . . .27
Pusher Arm Motor . . . . . . . . . . . . . . . .27
Magnetic Pick-Up Sensors . . . . . . . . . .27
Tube Sensors . . . . . . . . . . . . . . . . . . . .27
Printer . . . . . . . . . . . . . . . . . . . . . . . . . .27
RS232 Serial Port (Serial Loop Test) . .28
Yoke, Clapper, and Coil . . . . . . . . . . . .28
Troubleshooting Table . . . . . . . . . . . . .29
5. Adjustments
Insert Mode Position . . . . . . . . . . . . . .39
Operating Head (position 1) . . . . . . . . .39
Head Up/Down Sensor Board . . . . . . . .40
Tube Gripper . . . . . . . . . . . . . . . . . . . .40
6. Replacement Instructions
Automatic Calibration Cassettes
(4C3040) . . . . . . . . . . . . . . . . . .4CP042
Back Panel Upgrade
(4C3008) . . . . . . . . . . . . . . . . . .4CP008
Block Probe (390340) . . . . . . . . .39P340
Cassette Labels (4C3039) . . . . . .4CP039
Cassette Pusher Arm (390437) . . .39P437
Cassette Pusher Arm Motor
Assembly (4C3420) . . . . . . . . .4CP420
Cooling Fans (4C3121) . . . . . . . .4CP121
Cooling Pump (4C3188) . . . . . . .4CP188
Cooling Reservoir Assembly
(4C3310) . . . . . . . . . . . . . . . . . .4CP310
Cooling Reservoir Replacement
(4C3391) . . . . . . . . . . . . . . . . . .4CP391
Disk Sensor/Mounting Block
(4C3413/4C3436) . . . . . . . . . . .4CP436
Display Replacement Kit
(4C3851) . . . . . . . . . . . . . . . .4CP851R
Drip Return Well Assembly
(390843) . . . . . . . . . . . . . . . . . .39P843
Harness Upgrade (4C3149) . . . .4C3P149
Head Drive Assembly (4C3440) .4CP440
Head Rotation Idler Gear
(4C3416) . . . . . . . . . . . . . . . . . .4CP416
Head Up-Down Cable (4C3965) .4CP965
Heat Transfer Fluid Pump
(4C3189/4C3191) . . . .4CP189/4CP190
Keypad (4C3511) . . . . . . . . . . . . .4CP511
Mandrel (390444) . . . . . . . . . . . . .39P444
PCB Main Control/PCB Motor
Control (4C3600/4C3450) . . . .4CP450
Power Supply (4C3951R) . . . . .4CP951R
Print Head Assembly (4C3175) . .4CP175
Printer PC Board (4C3170R) . .4CP170R
Printer PC Board Upgrade
(4C3169) . . . . . . . . . . . . . . . . . .4CP169
The Advanced®Model 3900 Service Manual
Table of Contents

4
Probe Alignment Tool (3LA700) .3LP700
Reservoir T nk Probe (4C3340) 4C3P341
S mple Cooling Well (390300) . .39P300
S mple Probe Assembly
(4C3701) . . . . . . . . . . . . . . . . . .4CP700
Slot Cover Repl cement
(4C3427) . . . . . . . . . . . . . . . . . .4CP427
Tr nsistor Repl cement
(PCB520) . . . . . . . . . . . . . . . .PCP520R
Tr nsistor Repl cement
(PCB522) . . . . . . . . . . . . . . . .PCP522R
Tube Gripper (4C3446) . . . . . . . .4CP446
Tube Sensors (390026/390028) . .25P048
Yoke, Cl pper, nd Coil
(3LH230/3C2241/3D2404) . . .3LP230
7. Schematics
4C3000 Interconnection Schem tic
4C3450 Schem tic
4C3450 Assembly Dr wing
PCB610 Schem tic
PCB610 Assembly Dr wing
APPENDICES
A: Symbol Definitions
B: Product Dispos l nd Recycling
C: Service Log
Index
The Advanced Model 3900 Service Manual

1. Introduction

7The Advanced®Model 3900 Service Manual
Model 3900 Osmometer Specifications
Electrical:
Voltage: 100 to 130 VAC (1.2 A) or 200 to 250
VAC (0.6 A)
Frequency: 50 or 60 Hz
Fuses: 5-Amp time delay for 100-130 VAC;
2.5-Amp time delay for 200-250 VAC
Power: 350 Watts
Memory Backup: Integral lithium cell; 10-year life
(typical); non-powered; (not user-
replaceable)
Sample Volume: 0.2 to 0.3 mL
Sample Capacity: Up to 30 samples at one time,
continuously reloadable
Readout: 20-character vacuum fluorescent display
Units: mOsm/kg H2O
Range:
Low: 0 to 1550 mOsm/kg H2O
High: 1450 to 4000 mOsm/kg H2O
Resolution: 1 mOsm/kg H2O
Communications: On-board printer, DTE EIA-232/V.24
(RS-232) serial port and optional
barcode scanner
Performance at Reference Conditions1
Linearity:
Low Range: Less than ±0.5% from a straight line
between 0 and 1500 mOsm/kg H2O
High Range: Less than ±1.0% from a straight line
between 1500 and 4000 mOsm/kg H2O
Repeatability:
0 to 400 mOsm:±2 mOsm/kg H2O (1 S.D.)
400 to 4000 mOsm: ±0.5% (1 S.D.)
Drift: Less than 1 mOsm/kg H2O per month
Performance Over Operating Conditions
Temperature Effects: Less than 1 mOsm/kg H2O
for every 5°C (9°F) ambient
temperature change.
Operating Conditions
Temperature:
Low Range: 18°C to 35°C (64°F to 95°F)
High Range: 18°C to 30°C (64°F to 86°F)
Room Humidity: 5 to 80% relative humidity;
(non-condensing)
Storage Temperature: -40°C to +45°C
(-40°F to +113°F)
Start-up Time:
Actual time from power-on to “Osmometer
Ready” varies according to ambient temp-
erature and humidity -- typically 3 to 10
minutes. Maximum throughput may require
up to 30 minutes of equilibration time from
power-on.
Test Time: 90 seconds per sample (typical)
Sample
Throughput: Approximately 30 samples per hour at 23°C
(73°F); less at higher ambient temperature
and in high range
Dimensions inches centimeters
Width: 21.5 54.6
Depth: 20.0 50.8
Height: 21.5 54.6
Weight pounds kilograms
Net: 66.0 30.0
Shipping: 105.0 47.7
Warranty: One-year limited warranty on work-
manship and all parts except glass,
plastic and parts warranted by their
makers.
Certification:
Refer to Regulatory Notices (see page 11) for
applicable standards.
1Reference Conditions: 20 to 25°C (68 to 77°F); 40 to 60% Relative Humidity; tolerances of reference or calibration
solutions excluded.

General Description and Purpose
Advanced®Osmometers are devices for the
determination of the concentration of
solutions by means of freezing-point
measurement.
The Advanced®Model 3900 Multi-Sample
Osmometer uses high-precision thermistors to
sense the sample temperature, to control the
degree of supercooling and freeze induction,
and to measure the freezing point of the
sample.
The Service Manual
This Service Manual contains:
• instructions for performing repairs.
• guides for troubleshooting operational and
mechanical problems.
• circuit system illustrations.
• information about replacement parts and
service repairs.
This manual is designed to assist
service technicians, and does not
imply a license to perform repairs
without proper qualifications.
Service Assistance
To contact Advanced Instruments Product
Service:
• Call [phone] (toll-free within the
USA and Canada; after normal business
hours, dial extension 2191)
• Call +US [phone] (elsewhere)
• Or fax [phone]
When calling Advanced Instruments, have the
model and serial number from the label on
the back of the instrument, and a description
of the problem. Use a telephone as close to
the instrument as possible in order to
facilitate making recommended diagnostic
checks.
A service technician may assist in making
minor repairs over the phone, providing you
with recommended parts (or part numbers), or
may issue an authorization (RMA) to ship the
instrument for factory repair.
The RMA procedure is as follows:
1. Contact Advanced Instruments to obtain
an RMA.
2. Remove all fluids from the instrument
and install shipping plugs in the cooling
well and the fill plug.
3. Pack and ship the instrument in its
original carton. Do not send instrument
supply items.
4. Prepay shipment to the factory. Advanced
Instruments cannot accept collect
shipments. Insure the shipment or accept
the damage risk.
8
The Advanced®Model 3900 Service Manual

To reduce the risk of bodily injury,
electric shock, fire, and damage to
your instrument, please read and
observe the following precautions.
• If the product is used in a manner not in
accordance with the equipment design,
operating instructions or manufacturer's
recommendations, the operation of the
product may be impaired to the extent that
a safety hazard is created.
• Do not attempt to perform electrical work
if you are not fully qualified. This manual
is not a substitute for electrical training.
Symbol Conventions
The exclamation point within an
equilateral triangle is intended to
alert the user to the presence of
important operating and maintenance
(servicing) instructions in the
literature accompanying this product.
The lightning flash with arrowhead
symbol within an equilateral triangle
is intended to alert the user to the
presence of uninsulated and
dangerous voltage within the
product's enclosure that may be of
sufficient magnitude to constitute
risk of electric shock to persons.
The static symbol within an
equilateral triangle is intended to
alert the user to the presence of
internal components that could be
damaged by static electricity.
This static symbol is intended to
alert the user to the presence of a
specific component that could be
damaged by static electricity.
This symbol indicates the presence
of alternating current (AC).
This symbol indicates the presence
of a fuse.
This symbol indicates the presence
of protective earth ground.
This symbol indicates the power
is ON.
This symbol indicates the power
is OFF.
NOTE Additional symbol definitions are
available in the Symbols section.
General Cautions
• This product should be operated only with
the type of power source indicated on the
product’s electrical ratings label. Refer to
the installation instructions included with
the product.
• If the power cord provided is replaced for
any reason or if an alternate cord is used,
the cord must be approved for use in the
local country. The power cord must be
approved for the product’s listed operating
voltage and be rated at least 20% greater
than the ampere ratings marked on the
product’s electrical ratings label. The cord
end that connects to the product must have
an IEC 60320 connector.
• Plug the product into an approved
grounded electrical outlet.
• Do not disable the power cord’s
grounding plug.
• If an extension cord or power strip is used,
make sure that the cord or strip is rated for
the product, and that the total ampere
ratings of all products plugged into the
extension cord or strip do not exceed 80%
of the cord’s or strip’s rating limit.
Safety / Regulatory Information
9The Advanced®Model 3900 Service Manual

10
• Route power cords so that they will not be
walked on, tripped on, or pinched by items
placed upon or against them. Pay particular
attention to the plug, electrical outlet, and
the point where the cord exits the product.
• Do not pull on cords and cables. When
unplugging cords or cables, grasp the
corresponding connector.
• Do not install or use this product in any
area subject to extreme short-term
temperature variations, or locations that
exceed the specified operating
environment temperatures.
• Never use this product in a wet area.
• To avoid injury or fire hazard, do not
operate this product in an explosive
atmosphere.
• Do not install or use the product on an
unstable, non-level work surface.
• Do not operate this product with the covers
removed or unsecured.
Service & Maintenance Cautions
•Unplug the power cord prior to opening
or removing covers, or else you may be
exposed to electric shock, excessive
temperatures, or mechanical hazards.
•Performing service or maintenance not
detailed in the User Guide, with or without
this Service Manual, should only be done
by a qualified service technician.
•Never restrict airflow into or out of the
product. Occasionally, check the air vents
for blockage.
•Wipe the exterior of the product with a
soft, damp cloth as needed. Using cleaning
products other than those specified, may
discolor or damage the finish.
•If the product requires service for any of
the following reasons, unplug the product
from the electrical outlet and refer service
to a qualified service technician.
- The power cord, extension cord, power
strip or power input module is damaged.
- Liquid has been spilled into the interior
of the product.
- A foreign object has fallen into the product.
- The product has been dropped or
damaged by a falling object.
- There are noticeable signs of
overheating or a burning odor.
- The product does not operate normally
when you follow the operating
procedures.
- The main supply fuse(s) or any internal
fuse(s) continually fail.
•A discharge of static electricity from
contact with the human body or other
conductor may damage system boards or
static sensitive devices. Never perform
internal maintenance without following
recommended static protection procedures.
• The product is equipped with operator
accessible fuses. If a fuse blows, it may
be due to a power surge or failure of a
component. Replace the fuse only once.
If the fuse blows a second time, it is
probably caused by failure of a component
part. If this occurs, refer service to
qualified service personnel. Always
replace the fuse with one of the same
rating, voltage, and type. Never replace the
fuse with one of a higher current rating.
• When servicing the product, use only
factory-specified parts.
•WARNING: When returning this product
for service, or shipping this product to a
second location, remove all hazardous
specimens and decontaminate the product
before packaging for shipment. If the
product cannot be decontaminated, consult
with your shipping agent on appropriate
packaging and marking.
The Advanced®Model 3900 Service Manual

11
Hazardous Material Cautions
• WARNING: The specimens used in this
product may be hazardous to your health
and to the health of others. Follow national
and local recognized safety standards
and/or protocols for handling and
disposing of such specimens.
•If a hazardous material is spilled on or
inside the equipment, the user is
responsible for taking the appropriate
decontamination steps, as outlined by the
User national safety council or equivalent
agency for hazardous materials, and those
policies and procedures established within
the User place of business.
•To avoid injury or fire hazard, do not
operate this product in an explosive
atmosphere.
Regulatory Notices
•This product has been designed and
manufactured in accordance with U.S.,
Canadian, and European regulatory
requirements as outlined below.
Modifications made to this product that are
not expressly approved in writing by the
manufacturer will void the User authority
to operate this product, previously issued
factory approvals, and the User rights
under the warranty.
•The distributor or dealer may have applied
additional local, national, or international
approvals to this product. Consult the
distributor or dealer for more information
and documentation.
•Connections to this product must be made
with shielded cables. Use of non-shielded
cables may violate RFI/EMI limits.
The Advanced®Model 3900 Service Manual
Symbol Conventions
This symbol indicates conformity to
relevant European directives.
This symbol indicates the product
was tested to conform to relevant
Canadian and U.S. safety standards
by Intertek Testing Services NA,
Inc. The ETL mark is approved in
the United States as a Nationally
Recognized Testing Lab (NRTL) by
OSHA, and in Canada by the
Standards Council of Canada.
In Vitro Diagnostic Medical Device
complying with EU Directive
98/79/EC.

12
U.S. Safety This product has been listed by
ETL testing laboratories as being
in compliance with the
requirements of UL 3101-1, 1st
Edition, "Electrical Equipment for
Laboratory Use; Part 1: General
Requirements". The "US" in the
lower right of the ETL mark
demonstrates this listing.
Canadian Safety This product has been listed by
ETL testing laboratories as being
in compliance with the
requirements of CAN/CSA C22.2
No.1010.1-92, "Safety
Requirements for Electrical
Equipment for Measurement,
Control and Laboratory Use;
General Requirements";
Including Amendment Two. The
"C" in the lower left of the ETL
mark demonstrates this listing.
EC Declaration of This product meets the intent of
Conformity - EMC Directive 89/336/EEC for
Electromagnetic Compatibility.
Compliance was demonstrated
using the following standards, as
listed in the Official Journal of
the European Communities:
Consult the Declaration of
Conformance certificate shipped
with the product for the latest
update.
• EN 61326: 1998, Group 1, Class
B, "Electrical Equipment for
Measurement, Control, and
Laboratory Use".
EC Declaration of: This product meets the intent of
Conformity - Low Directive 73/23/EEC, the Low
Voltage Voltage Directive. Compliance
was demonstrated using the
following standards as listed in
the Official Journal of the
European Communities: Consult
the Declaration of Conformance
certificate shipped with the
product (if required) for the latest
update.
·EN 61010-1 (1990), "Safety
Requirements for Electrical
Equipment for Measurement,
Control and Laboratory Use -
General Requirements";
Including Amendment One
(1992).
The Advanced®Model 3900 Service Manual
Regulatory
approval type Description
Regulatory
approval type Description
EC Declaration of This product meets the intent of
Conformity - IVD Directive 98/79/EC for In Vitro
Diagnostic Medical Devices.
Consult the Declaration of
Conformance certificate shipped
with the product (if required) for
the latest update.
EC Declaration of This product meets the intent of
Conformity - WEEE Directive 2002/96/EC as amended
by 2003/108/EC for Waste
Electrical and Electronic
Equipment (WEEE). Consult the
Declaration of Conformance
certificate shipped with the product
(if required) for the latest update.

2. General Overview

The Advanced®Model 3900 Service Manual
15
Circuit Diagram

3900 Circuit Description
The 3900 is comprised of the following
functional blocks:
Power Supply
The power supply is a + 12VDC, 350 watt
single output supply. This supply will accept
an input between 100-250 VAC without any
input configuration changes (auto switching).
For 100-130 input voltage at 50-60 Hz, use 5
AMP time delay fuses; for 200-250 at 50-60
Hz, use 2.5 AMP time delay fuses. The power
supply provides 12VDC to the main control
board, the motor control board, the cooling
fans (3), all thermoelectrics (5), the solenoids,
the stepper motors, and the cooling pump.
5VDC is supplied to the main control board
through a +5Volt voltage regulator (LT1003).
Other onboard circuits are used to provide all
other required voltages (i.e., ±12VDC,
±15VDC, ±5VDC).
NOTE The internal printer may be powered
by +5VDC (red/orange wire) or
+12VDC (violet wire). Consult
system schematics for proper service.
Sample Cooling Assembly
The sample probe thermistor measures the
temperature of the sample. The thermo-
electrics (whose duty cycle is controlled
through the block probe thermistor) supercool
the sample. The stir/freeze wire constantly
stirs the sample to guarantee uniform cooling.
When the supercooled sample reaches a set
temperature, the stir/freeze wire “buzzes”,
causing the sample to freeze.
4C3600 Main Board Description
General: The microprocessor is an 8-bit
63A03R (a member of the 6800 family of
microprocessors). The microprocessor runs at
approximately 1 MHz and has an address
space of 64 Kbytes. The microprocessor runs
the software stored in the EPROM and uses
the battery-backed-up 8 Kbyte static RAM to
store information.
A/D Converters: Two dual-slope A/D
converters using programmable timer modules
provide interface from the sample and block
probes to the microprocessor. The A/D
converters use a reference voltage of 6.25
VDC and provide 15 bits (1/4 ohm) of
resolution.
Sample Cooling Interface: The thermo-
electrics are interfaced to a programmable
timer module through discrete logic. The
programmable timer module interfaces
directly to the microprocessor. The stir/freeze
wire driver is interfaced to the D/A converter
through discrete logic. The D/A converter
uses a 60 Hz 0-5 volt reference from a
programmable timer module through discrete
logic. The D/A converter interfaces directly to
the microprocessor. The power transistors,
mounted on the heat sink on the rear of the
instrument base, control the thermoelectrics
and the stir/freeze coil.
Keypad Interface: A peripheral interface
adapter is used to interface the keypad to the
microprocessor. A 3- to 8-line decoder is used
to pulse the different columns of the keypad to
check for key presses. The microprocessor
controls the keypad LEDs.
Display and Printer Interface: A peripheral
interface adapter is used to interface both the
display and the printer to the microprocessor.
Supervisor/Operator Keyswitch Interface:
A peripheral interface adapter is used to
interface the supervisor/operator keyswitch to
the microprocessor.
Head Transition Board Description
The stir/freeze solenoid and the sample probe
are connected to the head transition board,
which allows easy replacement.
16
The Advanced®Model 3900 Service Manual

The Advanced®Model 3900 Service Manual
Head Up/Down Sensor Board Description
This board provides two optical sensors that
interface to a peripheral interface adapter on the
main board. These two sensors detect the head
up and head down conditions.The LEDs on the
board indicate whether or not the sensor circuit
is functioning properly. The LEDs should be on
when the flag is positioned just beyond the
center point of the sensor.
Motor Control Board
General: The motor control board provides
all of the necessary controls and interfacing
circuitry to the microprocessor for all of the
motor-driven mechanisms, as well as control
over the cooling tank, cooling pump, pre-
cooling tank mode operation, and RS-232
communications port.
Motor Control
All four motor-driven systems (head rotation,
cassette index, head up/down, pusher arm) are
controlled by a Bimos translator/driver
integrated circuit. This IC controls the
sequencing logic, direction, output enable
control, and has a power-on reset function.
This IC is configured for a two-phase drive
sequence. Internal thermal protection circuitry
disables all outputs when the internal junction
temperature reaches approximately 165°C.
This motor control IC and related sensors are
interfaced to the microprocessor through a
programmable timer, a peripheral interface
adapter, and discrete logic.
Sensors (Magnetic)
The cassette input sensor detects when a
cassette is in position to be indexed. The
cassette full sensor detects when the output
deck is full. The ID sensors (4) detect the
identification number of the cassette. This is
done by means of a 4-bit binary position code
(magnet is placed in the correct position for
the ID # label on the cassette). The sensors all
work the same way; the output leads are open
normally and when a magnetic field of
sufficient strength passes near the sensor, the
leads are closed (shorted). The magnetic
sensors are interfaced to the microprocessor
through a peripheral interface adapter.
Cassette/Stat Tube Detectors
Both tube detectors use a reflective object
sensor which responds when a reflective
object is placed in front of it. The sensors are
interfaced with the microprocessor through a
peripheral interface adapter.
Cassette Index Sensor PCB
The cassette index sensor PCB detects when
the indexer is in the left-most and right-most
positions. The LEDs on the board indicate
whether or not the sensor circuit is function-
ing properly. The LEDs should be on when
the flag is located just beyond the center point
of the sensor.
Cooling Reservoir Assembly
This system consists of a thermistor probe,
heat transfer fluid level probes, cooling pump,
and four thermoelectric modules. The
thermistor senses the fluid temperature, which
serves as the controlling mechanism for the
thermoelectrics and cooling pump. The fluid
temperature set point is approximately -15°C.
The cooling pump is disabled if the tank
temperature rises above -10°C. A green LED
on the motor control board remains lit when
the fluid temperature is below -10°C. It takes
approximately 30 minutes from instrument
power up for the fluid to reach -10°C and
below. Samples can be run immediately from
start-up because the sample cooling assembly
contains its own thermoelectrics; however,
test times will be longer.
The cooling reservoir thermoelectrics (4
modules) are interfaced to a programmable
timer module through discrete logic. The
programmable timer module interfaces
directly to the microprocessor.
17

18
The fluid level probes are interfaced to a
peripheral interface adapter through discrete
logic. The peripheral interface adapter
interfaces with the microprocessor. There are
three LEDs located on the motor control
board which indicate the fluid level status.
• Yellow on indicates fluid level low.
• Yellow/ green on indicates fluid level half.
• Red/green/ yellow on indicates fluid level
full.
The status of the fluid level can also be
checked by using the “reservoir status”
function in the setup menu.
Serial Communication Port
Serial RS-232 Port Interface:
An Asynchronous Communications Interface
Adapter and RS-232 line drivers/receivers
provide the microprocessor with a serial port
interface that supports both hardware and
software handshaking.
The RS-232 port has the following pin
assignments:
Signal DB-9 Pin
Carrier Detect 1
Receive Data 2
Transmit Data 3
Data Terminal Ready 4
Signal Ground 5
Data Set Ready 6
Request to Send 7
Clear to Send 8
Head Rotation System
The disk sensor circuit controls the position
of the sample head at the cassette tube
retrieval/placement position. The controlling
system consists of an optical switch
(adjustable) and a slotted disk. The optical
switch is interfaced to the microprocessor
through a peripheral interface adapter.
The head rotation travel is controlled by two
mechanical limit switches; one is located on the
right side and one on the left side. The limit
switches are interfaced to the microprocessor
through a peripheral interface adapter.
Barcode Port:
A D-type, 15-pin barcode port is provided in
the back of the instrument for connecting and
providing power to such a device. For proper
operation, the barcode port requires a 1200
bps TTL signal providing asynchronous serial
data containing 1 start bit, 8 data bits, 1 stop
bit, and no parity.
A suitable barcode scanner is available from
Advanced Instruments. To interface with the
instrument, the barcode scanner must be
programmed as follows, referring to the
scanner user’s guide.
1200 bps
CR suffix
disable beep after good decode
triggerless trigger mode (optional)
The Advanced®Model 3900 Service Manual
+5V DC 1 to reader
receive data 10 from reader
gnd/earth 9 common
Signal Pin Direction
Barcode Port Connections

19 The Advanced®Model 3900 Service Manual
Replacement Parts
Supplies & Accessories
100 mOsm/kg Calibration Standard
(10 5-mL ampules) . . . . . . . . . . . . . . .3LA011
500 mOsm/kg Calibration Standard
(10 5-mL ampules) . . . . . . . . . . . . . . .3LA051
900 mOsm/kg Calibration Standard
(10 5-mL ampules) . . . . . . . . . . . . . . .3LA091
1500 mOsm/kg Calibration Standard
(10 5-mL ampules) . . . . . . . . . . . . . . .3LA151
3000 mOsm/kg Calibration Standard
(10 5-mL ampules) . . . . . . . . . . . . . . .3LA301
100 mOsm/kg Calibration Standard
(110-mL bottle) . . . . . . . . . . . . . . . . . .3LA010
500 mOsm/kg Calibration Standard
(110-mL bottle) . . . . . . . . . . . . . . . . . .3LA050
900 mOsm/kg Calibration Standard
(110-mL bottle) . . . . . . . . . . . . . . . . . .3LA090
1500 mOsm/kg Calibration Standard
(110-mL bottle) . . . . . . . . . . . . . . . . . .3LA150
Clinitrol™ 290 Reference Solution
(10 5-mL ampules) . . . . . . . . . . . . . . .3LA029
Osmolality Linearity Set (5 levels) . . . . . .3LA028
Protinol® Near Serum Reference
(3 levels) . . . . . . . . . . . . . . . . . . . . . .3 A028
Renol™ Urine Osmolality Controls
(2 levels) . . . . . . . . . . . . . . . . . . . . . . .3LA085
Evaporation Cover . . . . . . . . . . . . . . . . . . .390330
Fluid Fill Plug (vented) . . . . . . . . . . . . . . .4C3448
Sample Tubes, 0.2 mL/0.3 mL . . . . . . . . .3LA825
Sample Tube Cassettes, #1-5 . . . . . . . . . . .4C3050
Sample Tube Cassettes, #6-10 . . . . . . . . . .4C3060
Sample Tube Cassettes, #11-15 . . . . . . . . .4C3070
Sample Tube Rack . . . . . . . . . . . . . . . . . . .3LA846
Calibration Cassette . . . . . . . . . . . . . . . . . .4C3040
Heat Transfer Fluid . . . . . . . . . . . . . . . . . .3DA811
Cooling Reservoir Fill Funnel . . . . . . . . . .4C3308
Thermal Printer Paper . . . . . . . . . . . . . . . .FLA835
Paper Roll Holder . . . . . . . . . . . . . . . . . . .FL0408
Printer aintenance Kit . . . . . . . . . . . . . . .FL0425
Box of 100 Probe Wipers . . . . . . . . . . . . . .4C3840
10 Pack Drip Return Wipers . . . . . . . . . . . .---------
Disposable Air Filters . . . . . . . . . . . . . . . .3D2340
Operator/Supervisor Keys . . . . . . . . . . . . .3D3185
Power Cord (specify voltage and country) . . . .--------
Stir/Freeze Wire . . . . . . . . . . . . . . . . . . . . .3C2243
Probe/Stir Alignment Kit . . . . . . . . . . . . . .3LA700
Serial Port Computer Cable with DB9S:
3- eter Shielded RS-232 . . . . . . . . . .330053
6- eter Shielded RS-232 . . . . . . . . . .330056
9- eter Shielded RS-232 . . . . . . . . . .330059
Barcode Reader with Stand . . . . . . . . . . . .390016
Service anual . . . . . . . . . . . . . . . . . . . . .3905S
User’s Guide . . . . . . . . . . . . . . . . . . . . . . . . . .3905
How to order:
To order parts, supplies and accessories, contact
the Advanced Instruments Customer Service.
•[phone] (toll-free within the USA and
Canada)
•+US [phone] (elsewhere)
•+US [phone] (fax)
Automatic Calibration Cassettes . . . . . . . .4C3040
Back Panel Upgrade Kit . . . . . . . . . . . . . .4C3008
Block Probe . . . . . . . . . . . . . . . . . . . . . . . .390340
Cassette Labels . . . . . . . . . . . . . . . . . . . . .4C3039
Cassette Pusher Arm . . . . . . . . . . . . . . . . . .390437
Cassette Pusher Arm otor Assembly . . .4C3420
Cooling Fans . . . . . . . . . . . . . . . . . . . . . . .4C3121
Cooling Reservoir Assembly . . . . . . . . . . .4C3310
Disk Sensor/ ounting Block . . .4C3413/4C3436
Display Kit . . . . . . . . . . . . . . . . . . . . . . . . .4C3851
Drip Return Well Assembly . . . . . . . . . . . .390843
Fluid Pump Diaphragm . . . . . . . . . . . . . . .4C3190
Harness Upgrade . . . . . . . . . . . . . . . . . . . .4C3149
Head Drive Assembly . . . . . . . . . . . . . . . .4C3440
Head Rotation Idler Gear . . . . . . . . . . . . . .4C3416
Heat Transfer Fluid Pump . . . . . . . . . . . . .4C3189
Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . .4C3511
andrel . . . . . . . . . . . . . . . . . . . . . . . . . . .390444
PCB ( ain Control Board) . . . . . . . . . . . .390600
PCB ( otor Control Board) . . . . . . . . . . .4C3450
Power Supply . . . . . . . . . . . . . . . . . . . . . . .4C3951
Print Head Assembly . . . . . . . . . . . . . . . . .4C3175
Printer PC Board . . . . . . . . . . . . . . . . . . .4C3170R
Printer PC Board Upgrade Kit . . . . . . . . . .4C3169
Probe Alignment Tool . . . . . . .3LA703/3LA703R
Reservoir Tank Probe . . . . . . . . . . . . . . . .4C3340
Sample Cooling Well . . . . . . . . . . . . . . . . .390300
Sample Probe (stainless steel) . . . . . . . . .4C3700
Slot Cover . . . . . . . . . . . . . . . . . . . . . . . . .4C3427
Transistor . . . . . . . . . . . . . . .PCB520R/PCB522R
Tube Gripper . . . . . . . . . . . . . . . . . . . . . . .4C3446
Tube Sensor . . . . . . . . . . . . . . . . . .390026/390028
Yoke, Clapper & Coil .3LH230/3C2241R/3D2404

20
The Advanced®Model 3900 Service Manual
Notes: