Tuttnauer 2301006, Operation & Maintenance Manual

Page: 19 / 122

Page 14 of 117 pages
Analog Inputs for Reading Pressure
The system contains 6 inputs for reading pressure from 4 – 20mA sensors. There
are at least 3 sensors on each ADC.
The pressure reading occurs from inside the chamber, the steam entrance, and
sealed doors.
Each sensor has an output of 4mA. The system allows the measurement range of
the sensor to be set by external software.
Measuring pressure in chamber
The display and printing scale is in kPa.
The measurement range is 0-400kPa absolute.
The resolution measurement and display is 1 kPa.
The accuracy of the measurement is a maximum 1% from the range, i.e.4kPa
Calibration of the pressure circuit needs a special code.
Measuring jacket pressure
The measurement range is 0-400kPa absolute.
The resolution measurement and display is 1 kPa.
The accuracy of the measurement is a maximum 1% from the range, i.e. 4kPa
Calibration of the pressure circuit needs a special code.
Measuring generator pressure
The measurement range is 100-600 kPa (absolute).
The resolution measurement and display is 2kPa.
The accuracy of the measurement is maximum 1%from the range i.e. 5kPa.
Calibration of the pressure circuit needs a special code.
Measuring the pressure of a gasket
The measurement range is 0 – 400 kPa absolute.
The resolution measurement and display is 1kPa.
The accuracy of the measurement is maximum 1% from the range, i.e. 4kPa
Calibration of the pressure circuit will need a special tool or code.
Voltage Inputs for Water Level Electrodes
Water level electrodes may be placed at a few points in the autoclave. Due the
experience accumulated at “Tuttnauer”, it was determined a maximum of 3
water-level measuring points are required for the sterilization process. The points
are as described below:
If the autoclave is equipped with a steam generator, 2 water level measuring point
are required. The lower electrode stops the operation of the generator if the water
level decreases below the minimum required to produce steam. The upper
electrode controls the switching on of the water pump.
When sterilization or cooling is performed by water entering the chamber, water
level measuring is required. This measuring is performed by one water level
electrode.
The electrode used for measuring water level is made of a gold-coated stainless
steel rod. The electrode closes an electric circuit when its tip touches the water.