Bayer HealthCare RapidPoint 400 Series, Руководство по обслуживанию

Страница: 69 / 458

Rev. C Electronic System Overview 69
Contact PC Board
The Contact PC board amplifies signals from the electrodes before they
are processed by the rest of the system. The Contact board provides the
following:
• low bias, current-transimpedence output amplifiers and bias amplifiers
for four amperometric sensors
• high-impedance differential amplifier for seven potentiometric sensors
• AC current, source and synchronous, differential amplifier for two
hematocrit/fluid detector sensors
• connections for three thermistors organized in a thermal-control loop
that regulate the sample temperature to +37°C
• connections to an EEPROM device located within the sensor module
for storing calibration and configuration information specific to the
measurement cartridge
Digital Signals
Digital Input Signals
Digital Output Signals
Input Signal Description
ID_SDA Serial data line to the EEPROM located in the sensor module.
This signal is bi-directional.
ID_SCK Serial clock line to the EEPROM.
ASAMP Control signal for the charge transfer process in the
hematocrit circuits.
BSAMP Control signal for the charge transfer process in the
hematocrit circuits. The BSAMP signal is out of phase with
the ASAMP signal.
DRIVE This signal provides the AC excitation voltage for the
hematocrit sensors.
Output Signal Description
ID_SDA Serial data line to the EEPROM located in the sensor module.
This signal is bi-directional.