MULTIFUNCTIONAL GAMMA MONITOR MFM 203
MFM 203 is a portable-size instrument, functionally completely down-compatible and superior to the AMES type MFM 202A. It has completely new electronics and software, designed for the continuous monitoring of gamma radiation in the environment. MFM 203 autonomously performs all the necessary functions of a self-sustained local monitor. When connected to a data communication link, it serves as a smart field unit of the real-time automatic early warning network. Supplied with two energy-compensated GM probes of different sensitivities, MFM 203 can cover dose-rates from the normal background to the accidental levels.
The microprocessor-controlled monitor is equipped with a keyboard and an alphanumeric LC Display. Small printer or external data storage can be connected as an option. Unit autonomously processes, displays and prints (if equipped with the printer) all measured data and warnings, triggering visual and audible alarms. It is designed to be connected on-line (via computer network interface, telephone line modem or radio link) to the central data collecting and controlling computer of an early warning system. Data can be transferred in real time or at scheduled time intervals.
In the standard version the instrument consists of the following components:
MFM 203 measuring unit
remote “A” (high-sensitive) probe
remote “B” (low-sensitive) probe
FUNCTIONS
MFM 203 performs the following functions:
measures and displays:
Dose rates (Sv/h),
Preset count mode: with a predefined statistical uncertainty, it automatically adjusts measuring intervals to the intensity of the radiation (variable time constant of the instrument)
Preset time mode: instrumentn measures in a predefined equal time intervals (statistical uncertainity depends on the dose rate)
triggers the adjustable alarms (with visual and audible signals), records their occurrences and transmits the alarm status
measures the dose increment (?Sv) from the last periodic report (usually 24 hours)
automatically gives periodic reports on the dose increment, dose rates, alarms and functional warnings
measures the total dose (?Sv) of a longer time period
HIGHLIGHTS
quick and simple assembly and initiation
user friendly menu-based operation
automatic operation and easy management with instructions shown on the LCD
"preset count mode" with predefined precision of the measurements with automatic optimisation of the number of measurements
"preset time mode" with constant predefined measuring interval
self-controlled operation with diagnostic and warning printouts
bypassing of mains power failure (approx. 2 days) with a built-in rechargeable battery or with an optional larger external 12 V battery
linking to the communication network (modem + telephone line, radio - link) for the centralised on-line data collection and control (early warning system) over the built-in buffer memory and RS-232-C port
simple type-in reprogramming of code-protected measuring parameters (for example, when introducing a new measuring mode or when changing the probe calibration constants)
possibility to directly connect sensor for rain intensity and quantity (tipping-bucket or weighting ombrometer)
fully compatible with AMES types MFM 202 / MFM 202A
