Radiation to be detected :
Range : 0 - 10000 µR/hr
0.00 - 100.00 µSv/hr
0- 50000 CPM
Range and Unit are configurable
Detector : High sensitivity energy compensated Halogen -quenched G. M. Tube GM132E or equivalent having a sensitivity of 160 cps / mR/hr
Accuracy : +/ - 10% Full scale.
EHT : 400V to 700V DC adjustable (Typical 500V)
Display : 5" TFT display is used for display of doserate information and hardware status information TFT display is used for visualization of preset alarm and other parameters.
Overload : Senses overload above 200% of fullscale and upto 1 R/h & indicates on display “OL”
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 “OFl”
Recorder output : 4-20 mA, with 600 ohm load.
Recorder output stability
(a) Non-linearity : Max = 0.025% of Span
(b) Offset current (Io=4mA):Max= 0.0005% of Span / oC
(c) Span Error (Io=20mA) : Max = 0.005% of Span / oC
Time Constant : First reading on Power ON within 5 secs.
Normal (Slow) : 30 sec to 0.5 sec automatically varying inversely with the radiation level.
Abrupt detection : Update the current reading within 2 sec and return to normal mode.
Calibration Accuracy : +/- 10% through out the range.
Instrument “ON” Indication : Large Area Green LED Lamp. This will indicate the Normal condition also.
Alarm range : 1 - 9999 µR/hr.
0.01- 99.99 µSv/hr
The alarm level setting will be carried out through front panel keypad / RS-485 Serial port using handheld configurator / PC with password protection. Front panel keypad is provided with DIP switch de-activation.
Alarm Indication : a) Red (LED) flashing large area window display
b) Loud alternating audio tone (Dual frequency tone)
Instrument Controls :
a) Acknowledgement switch for muting audio
b) Reset switch for resetting the Alarm indication and alarm relay.
c) Power ON/OFF switch (This is inside the cabinet) with Power ON indication
Instrument Fault indication :
EHT failure : Visual alarm with flashing red LED indication & “Eht” message on display
Detector failure : Visual alarm with flashing red LED & “d-FL” message on display.
Microprocessor / microcontroller failure : Visual alarm with flashing green lamp.
Fault indications shall be cleared automatically if normal status is resumed.
a. The detector is located external to the Monitor.
b. It is housed in a suitable, air-tight SS shell with built-in pre-amplifier to drive upto 50 mtrs long cable.
c. The instrument is provided with 10 mtr cable between detector and the monitor.
d. The detector housing qualify minimum industrial protection Class IP-54.
e. The monitor have clamp on the top for fixing the detector assembly.
f. A separate mounting bracket for detector housing is provided.
a. Vapour-tight , rugged & elegant.
b. The door is provided with lock and key arrangement
c. The enclosure qualify minimum industrial protection Class IP-54.
d. Decorative with visual aesthetics, prominent alarm display and good readability.
Detector housing is mounted using clamps on top of the monitor. The monitor is wall mountable type. Brackets for the monitor & detector housing are supplied along with the equipment.
Remote /External Console:
a. 4 - 20 mA linear proportional to full scale display output. Current output is able to drive load of 600 ohms. Output circuitry shall be able to drive 200 mtrs.of twisted pair of wires.
b. Two sets of potential free contacts of Alarm relay (Change over). Contact rating 3 Amp at 250 VAC. The relay is energized on normal condition and de-energised under alarm condition.
c. Remote alarm acknowledgement and reset signals for the field instruments (Normally open contact).
d. Indication of instrument fault condition (detector, EHT and LV supplies failure), over range & overflow conditions by up-scale 4-20 mA. (22.5 mA)
e. All these signals are terminated on a 17 pin socket (Allied Connectors). The corresponding mating plug with 5 mtr cable is supplied with the monitor.
f. RJ 45 connector for Ethernet port
g. RS-485 serial port (optional). This is in parallel with D-type connectors.
Computer Interface :
The monitor shall have a Ethernet 10/100 Mbps port for interfacing with a remote IBM PC-compatible computer. The features supported by Ethernet port are given below.
• The PC and the monitor shall operate in a host-slave configuration and the software protocol will be MODBUS/TCP.
• The PC as the host shall give commands and send queries. The monitor will carry out various functions in response to the queries.
• The firmware of the monitor shall be able to send the instrument data like instrument ID, instrument type, input range, display range, alarm settings, alarm status, current reading, diagnostic status of EHT/GM tube etc. to the Host PC on demand.
• The firmware shall be able to receive commands from Host PC and carry out the setting of different parameters like instrument ID, instrument type, input range, display range, alarm settings, Ack, Reset, instrument address etc.
Data transfer using socket programming for transfer of last 24hr data is provided.
IP address is settable only through front panel keypad or through RS485 interface (17 pin I/O).
Self Diagnostics :
The monitor has built-in self diagnostics. On being powered it will perform tests to ensure that all components and sub systems are functioning properly. It will check for the Power supplies, High Voltage Supply, Detector and Counting electronics.
Input Power :
230VAC +/-10%, 50Hz, single phase supply. Power ON/OFF switch is provided with a neon indicator. Spike suppressor and line filter are also provided.
Size: 357H x 410W x 140D
Weight: 8.5kg approx