Wide Range Analog Module
Detector: fission chamber
Measuring range: 1 to 106 pps (pulse); 10-8 to 3.16*10-6 Arms (AC)
Neutron flux measurement in source and intermediate ranges
High voltage generator: included
Multiline: analog and digital signals without intelligence.
RS 422 serial I/O
Powered from single power supply
The RNL-04.02 type Wide Range Analogue module is the more intelligent version of RNL-04.01. It has RS 422 serial I/O interface, supporting simple connection to Neutron Flux Data Processor.
The RNL-04.02. Wide Range Analogue Module is used for the measurement of currents from fission chambers. It serves for the measurement of the neutron flux in the source and intermediate range. The signal of the fission chamber gets to the input of the preamplifier. It amplifies the measuring signal and splits it into pulse and AC components. These signals are separately amplified in the pulse and multirange AC amplifiers. The stepping type range switching is accomplished by automatic or manual manner, depending on the state of AUT/MAN signal. In manual state the range is controlled by RANGE UP or RANGE DOWN binary signals. The TG0…TG2 test generators are controlled from TEST ON input. If this level goes high, a test signals are switched to the amplifiers sequentially.
The positive HV power supply is built up of encapsulated circuit. Both set-value control signal (HV+CNTR), and monitoring signal (HV+MON) are connected to RS 422 serial I/O lines.
The module is located in a double-shielded box out of the reactor vessel. It is built in massive brass housing to protect from electro-magnetic interference waves and cross coupling. This unit is installed isolated into additional die-cast aluminum housing. This insulated installation provides an additional protective screen. Maximum 200 m long cable ensures the electrical connection between the analog module and Neutron Flux Data Processor.
The primary supply of power enters the board. The unit also contains an isolation amplifier-current loop function to get the primary power monitoring signal (MON POWER S) output.
Main Technical Data