Circuit Descriptions; Amperometric Isolation Circuits - Bayer HealthCare RapidPoint 400 Series Service Manual

Output Signal
REFV_PO2
REFV_GLU
REFV_LAC
REFV_CRE
+5_VDC
-5_VDC
ID_PWR
ID_RET
PREMUX_SIG_HI
PREMUX_SIG_LO
THM_BLK_HI
THM_BLK_LO
THM_PRE_HI
THM_PRE_LO
THM_DOR_HI
THM_DOR_LO
HCT1_SIG
HCT2_SIG

Circuit Descriptions

Amperometric Isolation Circuits

There are four isolation circuits on the Multiplexer board for the four
amperometric channels (oxygen, glucose, lactate, and creatinine).
Rev. C
Description
Isolated +800 mV reference voltage for the oxygen
electrode.
Isolated -400 mV reference voltage for the glucose
electrode.
For future use.
For future use.
Positive power supply for the potentiometric amplifiers.
Negative power supply for the potentiometric amplifiers.
Power supply for the EEPROM in the sensor module.
Power supply return signal for the EEPROM.
Multiplexed sensor signal, offset adjusted and properly
amplified output of the Multiplexer board.
Signal low sense return for PREMUX_SIG.
Signal connected to the reference side of the bridge.
High terminal of the block thermistor.
Signal connected to the reference side of the bridge.
High terminal of the preheater thermistor.
Signal is not used.
Signal is not used.
Output of the first hematocrit circuit. This signal originates on
the Contact board and passes through the Multiplexer board
on its way to the DAS circuitry.
Output of the second hematocrit circuit. This signal
originates on the Contact board and passes through the
Multiplexer board on its way to the DAS circuitry.
Electronic System Overview 105