Radiation/Contamination detected: Alpha, Beta & Gamma

Contamination Probes :
Choice of Alpha & Beta-gamma contamination probes. (refer to accessories)

Detector Probes :
a. Beta-gamma contamination probe (two types)
b. Alpha contamination probe

Modes (for measurements) :
a. CPS b. CPM C. Preset Scaler

Ranges : (CPS/CPM/ Preset Scaler)
0-106 - Autoranging
Trend Indication : A 3 decade LED bar scale display for indication of countrate trend in CPS can be provided optionally.

Preset Levels: Adjustable in steps of 1 between 0-999999 counts / countrate

HV : HV (0-1000V) @0.5mA continuously variable through front panel keypad, ripple less than 20mV, line & load regulation better than 0.05%.

HV indication :
On LCD dotmatrix provided.

Time Constant : (TC)
LO, MED and HI in CPS/CPM
Unit can be operated in preset scaler mode where one can count contamination for a preset time.
Time constant selected in the range of 1-8 sec for cps, 4-32 sec for CPM

Display :
20x2 Dotmatrix LCD display

Memory Storage :
Built-in EEPROM facilitates the user to store the contamination readings upto a maximum of 1000.

Audio :
Unit has the built-in buzzer to give beeps for every radiation event detected and to generate loud audio alarm in the event of countrate exceeding preset levels.

Alarms:
Clean & contamination conditions are indicated by 2 large area RED & GREEN LEDs.

Test Facilities:
(a) The instrument has provision to check GM detector response with voltage. Once the start voltage, Voltage step, Preset time are set, User can acquire for plateau generation.

Instrument at the end of acquisition can calculate the slope depending upon the start voltage and end voltage selected and the counts obtained at corresponding voltages.

(b) Instrument is provided with a test mode where in a fixed frequency of pulses are fed to the counter for routine testing.

Instrument Fault Indications: Fault indications of EHT and detector failure are indicated on front panel display and will reset automatically on recovery.

Remote/ External console:
4-20mA full scale output is brought out on a 17pin MS connector to drive a load of upto 600 Ohms. This output is avaliable for CPS/ CPM modes only.

2 sets of potential free contacts of alarm relay with a rating of 3A @ 250VAC are brought out on the MS connector. The relay is deenergized on normal condition and activated on contamination / active condition.

RS-485 Interface/ Ethernet Interface :
The monitor can be provided with either RS485 port or Ethernet port with below specifications to facilitate remote monitoring and diagnostics

RS-485 Specification :
Type : Isolated Multi-drop serial communication port, half duplex bi-directional communication
Address : User configurable from 0 to 255
Protocol : MODBUS RTU
Bit Rate : user 19200
Connector : 9 Pin D – Type Connector

Ethernet Specification :
Type : Ethernet Communication port
Protocol : MODBUS TCP
Bit Rate : 10 Mbps
Connector : RJ 45

Keypad commands :
Unit has intelligent keypad with command buttons as PROG, INC, DEC, STORE, STOP, etc,.

Serial Port :
Built-in RS485 port facilitates data down loading into PC
Using Modbus RTU Protocol

Self-Diagnostics:
The monitor will have 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 High voltage supply, Detector and pulse processing electronics .
Fault Indications of EHT & detector are indicated on front panel and will reset automatically on recovery.

Hand held Configurator (Optional)
· It facilitates reading monitor ID, fault Diagnostics, current count rate, preset alarm levels, current alarm status, baud rate etc.
· It uses 20x4 LCD character display.
· 2x3 tactile keypad for data counting / setting & parameters viewing.
· Uses dry cells 1.5V x 4.

Data Communication Software :
(Optional at extra cost)
Can be provided for serial transfer of data readings into PC.

Dimensions :
236mm (W) x 246mm (D) x 133mm (ht)

Power :
230V AC, +/-10%,50 Hz supply. Power ON/OFF switch has been provided unit has built in spike protection circuit.

Environment:
The instrument will be able to withstand temperature upto 50 deg C and relative humidity upto 95% in radiation areas.

Compliance : Instrument will meet all requirements applicable
(a) ANSI N 42.17
(b) IS -9000 part III & V
(c) Interference test as per IEC61000 or equ.