Environmental-Monitor Type: NXG_ERM41, manufactured & supplied by Nucleonix Systems is primarily designed to indicate dose rates in the measuring unit selected & produces audio/visual alarms, if the dose rate exceeds preset value. By default the unit is set to be in µR/hr & the range is 0µR-10mR/hr). It uses latest state-of-art electronic devices including SoC based on ARM cortex A5 400MHz CPU with associated peripheral devices and other discrete ICs & components.

Use of these devices makes it compact & highly reliable. Powerful embedded code adds – up and enhances its performance and gives extra advantage from the angle of fault diagnostics, programmable features & measurement of rate & data communication under networked environment. This Environmental Monitor (Type: NXG_ERM41) will be useful for monitoring Low Gamma dose rate levels in mR/hr working areas of Radio Isotope Laboratories, Radiotherapy departments, Medical & Industrial Radiological installations apart from its usefulness in Atomic Power Stations, radiochemical plants, waste immobilization plants etc., With power ON, initialization of SoC, peripheral devices, counter etc, takes place. Followed by this, dose rate, calculation takes place in the selected unit such as mR/ hr. Additionally, hardware & fault diagnostic check will be carried out.

Environmental Monitor (Type: NXG_ERM41) indicates dose rate digitally on NUCLEONIX SOFTWARE through ethernet communication. The user interface is through NUCLEONIX Software by using Ethernet Communication. In Application that require External probe a Smart Probe is provided with RS485 interface. It can be installed in the measurement area, where as the display unit can be in the Operations/ Control

Features

• Uses SoC, based on ARM Cortex A5 400MHz ,1.5MB SRAM,128MB Flash,extensive use of peripheral devices & Ethernet interface has been employed.
• Uses Microcontroller for counting radiation pulses, fault diagnostics, setting HV etc.
• Dose rate, range covered is (0.01 – 100) mR/hr by default, with option of selection of other three ‘units’ namely µSv/hr, CPS & CPM.
• Auto ranging & auto TC selection in the range of 30 sec to 0.5 sec depending upon detector count rate.
• 5” TFT display indication for dose rate, alarm status & configuration settings.
• Designed using GM tube type LND 713 or its equivalent.
• Large size WINDOW indication on TFT display for NORMAL & ACTIVE alarm condition.
• Alarm set point & ACK / RST through touchscreen.

Specifications

Radiation to be detected :	Gamma Radiation & X- Rays.
Range :	0.01 -100 mR/hr 0.1 – 1mSv/hr 0- 50000 CPM Range and Unit are configurable.
Detector :	Energy compensated Halogen -quenched G. M. Tube LND713 or equivalent having a sensitivity of 7.5 cps / mR/ hr .
Energy Response :	+/-25% from 100keV upto 1.25MeV.
Accuracy :	+/ – 10% Full scale with Cesium source.
EHT :	400V to 700V DC adjustable (Typical 500V) (factory set).
Display :	5”TFT is used for display of doserate, hardware status information & also for visualization of preset alarm and other parameters.
Overload :	Senses overload above 200% of full scale and upto 1 R/ h & indicates on display “OFL”.
Over-range :	Senses if the radiation field being measured has exceeded the measurement range of the instrument and upto 200% of the instrument and displays “OVR”.
Time Constant :	First Stable reading on Power ON within 1 min. Normal (Slow) : 30 sec to 0.5 sec automatically varying inversely with the radiation level.
Abrupt detection :	Update the current reading within 2 sec.
Calibration Accuracy :	+/- 10% through out the range.
Alarm range :	0.01 mR/Hr to 99.99 mR/hr. 0.1 µSv/Hr to 999 µSv/hr. 1-50000 CPM . The alarm level setting will be carried out through Radgrid Software by Ethernet Communication.
Alarm Indication :	a) Red Mimic flashing large area on TFT display. b) Loud alternating audio tone (Dual frequency tone).

Input Power : 230V AC +/-10%. Mechanical Enclosure: Size: 180H x 178W x 38D. Weight: 1Kg approx.