The Ludlum CDV-700 Retrofit Board is intended to upgrade old civil defense radiation meters. Benefits include:
 		 
       
• Modern, reliable electronics
• Long battery lifetime
• Low battery warning
• Adjustable HV		  
       
 

The upgrade can be applied to civil defense meters marked “Anton” Model 6 or “Lionel” Model 6B. The 5397-179 board has two additional potentiometers to adjust the high voltage and to adjust the battery test point. The upgrade process does involve drilling holes in the aluminum front panel. The upgrade replaces all the electronics but retains the front panel, meter, “D” cell battery holder and instrument can. The user may also wish to modify their hard-wired detector cable - and would need to order 4085-561 Probe Mod Kit, and the cable of their choice.

  
  Part Number: 5397-179 - Board only  
  Part Number 4397-153 Hardware Kit and Harness, including HV pigtail to "C" connector and Unimorph Assembly..  
       
         
  INDICATED USE: Upgrading older civil defense radiation measurement meters
RESPONSE:4 seconds (FAST) or 22 seconds (SLOW) at 90% of final reading
FOUR LINEAR RANGES:Range multipliers of X1, X10, X100 and X1000
METER SCALE: Typically 0 - 300 C/M, 0 - 0.5 mr/hr
SENSITIVITY: -35 ± 5 millivolts (mV)
AUDIO: Built-in unimorph speaker with an ON-OFF switch
HIGH VOLTAGE: Fixed at 900 Vdc, adjustable from 500 to 1000 volts by internal potentiometer
CONNECTOR: Series “C”, 706 U/G: BNC or MHV may be provided
POWER: Two standard ”D”size batteries
END-OF-BATTERY-LIFE AUDIO: At approximately 2.0 Vdc battery voltage, the instrument emits a steady audio tone, warning the user of a low-battery condition. This audio overrides the audio ON-OFF switch.
 		 
         

    Ordering Info.

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