Radiation to be detected :
Gamma Radiation & X- Rays.
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 GM131 - NXG_AGM4 or equivalent havinga 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 fullscale 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 automaticallyvarying inverselywith 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 Cmmunication.
Alarm Indication :
a) Red Mimic flashing large area on TFT display.
b) Loudalternating audio tone (Dual frequency tone).
Alarm annunciation scheme
As tabulated below :
Instrument Controls :
a) Acknowledgement icon for muting audio alarm.
b) Reset icon for resetting the Alarm indication and alarm relay.
Instrument Fault indication : HV failure : Visual alarm with flashing red MIMIC indication & “HV” message on display.
Detector failure : Visual alarm with flashing red MIMIC & “Detector Failure” message on display. Fault indications shall be cleared automatically if normal status is resumed.
(In case of External Probe)
a. The Smart Probe is located external to the Display Unit.
b. It is housed in a suitable, air-tight SS shell with built-in pre-amplifier, HV & Microcontroller with RS485 interface.
c. The instrument is provided with
5/10 mtr cable between Smart Probe and the measuring unit, by default. Extra length can be provided on specific request.
d. The detector housing qualifies industrial protection Class IP-54.
e. A separate mounting bracket for detector housing is provided.