
Chapter 1
Osmo1 overview
15
Osmo1
™
Single-Sample Micro-Osmometer Service Guide
Display PCB
The display PCB contains a high-power IMX6 micro-
processor running a real-time operating system (RTOS)
from Mentor Graphics called “Nucleus.” It is used to
interact with the color/touch LCD screen and to provide
the following serial interfaces to the control PCB:
•
Two USB 2.0 Type A ports
•
One Ethernet port
•
One USB 2.0 Type B port
Interfaces
The display PCB has the following interfaces:
•
RS-232
(1x): This serial interface communicates
commands and data to/from the control PCB.
•
USB 2.0 Type A
(2x): These interfaces allow a USB
device to be attached to the rear of the instrument via
internal shielded USB cables to USB adapter.
•
USB 2.0 Type B
(1x): This interface allows a USB device
to be attached to the rear of the instrument via
internal shielded USB cable to USB adapter.
•
Ethernet
(1x): This interface allows a 10/100 RJ45
cable to attach to the rear of the instrument via
internal shielded Ethernet cable to Ethernet adapter.
Non-volatile memory
The display PCB has non-volatile memory used to store
the last one thousand sample records.
The control PCB has non-volatile memory used to store
instrument set-up, calibration, and other pertinent data.
Real-time clock
The display PCB has a real-time clock and a back-up
battery to maintain the date, time, and firmware versions.
The instrument uses three proximity sensors to
determine the presence of sample tubes, objects near
the barcode scanner, thermoelectric module cooling,
activation of the solenoid, and the A/D reading of the
Wheatstone bridge circuits of the sample probe and
block probe.
Cradle switch assembly
The cradle switch is part of the sample handling
assembly. It informs the processor whether the cradle is
fully inserted or is pulled back.
RFID assembly
The RFID assembly reads and updates the count of
sample tips in the test kit box (part no. 133800) and
allows test to begin when count is greater than zero.
110V/220V
Power In
Serial
3 – USB A Ports
2 – Temperature Probes (24-bit)
1 – TEC Cooler
1 – Solenoid Impactor
1 – Cooling Fan
1 – USB B Port
1 – Ethernet Port
AC/DC
Power
Supply
Exhaust
Fan
Control
PCB
Power Entry Module
(Switch, Fused, Filtered)
Power/Control Box
Color/Touch
Display
Display
PCB
Display Box
Cradle
Switch
Assembly
Sample
Cooling
Assembly
RFID Assembly
Barcode
Scanner
Thermal
Printer
Figure 4: Electrical components of Osmo1