GUIDO RAYOS X NESTORET 5050, Manual, Page: 30 / 60

GUIDO RAYOS X, S.A.
NESTORET 5050
30
MAN-011
Feb. 01
Ed. 2 / Rev. 1
The NESTORET 5050 Incubator has the capability to read signals
generated by an Air Temperature sensor, by a Skin Temperature sensor,
by a Humidity sensor, by an Oxygen Concentration sensor, by a Heating
Device Temperature sensor and the Fan Operation by HALL effect.
The Air Temperature Sensor is amplified by U7 being possible to adjust
the P5 gain and the P13 offset.
The Skin Temperature sensor is isolated from the circuit by means the U8
isolation amplifier that provides a 2500 Vpp isolation. At the output of
this amplifier the
U9 circuit amplifies the sensor isolated signal being
possible to adjust the gain and offset by the P14 and P8 respectively.
The Humidity sensor is a capacitive sensor with signal conditioning. It
makes a correction in the relative humidity depending on the temperature.
The humidity correction factor can be adjust by the
P1 potentiometer of
the humidity board. Gain level is adjustable by P2 .
The signal generated by the Oxygen Concentration sensor is amplified by
U16 , being possible to adjust the gain and offset by P12 and P7
respectively.
The Heating Device Temperature sensor is amplified by U13 being
possible to adjust the P10 gain and P11 offset.
When fan blades rotation, the HALL effect sensor generates a pulse.
Those pulses are integrated by
C19 , D8 , R66 and C21 , having at TP9 a
proportional power to the fan rotating speed.
The J11 and J12 Connectors are free to receive any other analogic signal
that could be used on future implements. At present these two inputs are
deactivated in the activation/deactivation panel from the service program.
5. Power Drivers
The heating device and the fan are activated by their corresponding
driver. The signal coming from the Microcontroller is isolated by the
OPT1-OPT2 Optocoupler that feeds the TRC1-TRC2 Triac supplying
power to the heater and to the fan. The heater is activated and deactivated
upon requirement of the system. The fan is activated/deactivated when
pressing
ON/OFF key.
IV.2. ADJUSTMENTS
Here below are described the adjustment instructions to perform on the NESTORET
5050 in case of replacement of some of the components, such as sensors, circuits, etc.,
due to a failure.
To perform the adjustments properly the following instruments are required:
•
Digital Voltmeter (DVM).
•
Temperature and Oxygen Concentration Simulator (SIM50TO).
•
Humidity Concentration Simulator (SIM50HR).