Fluke Biomedical 05-450 - Manual (Page 13)

Digital Doorway Monitor
General Specifications
5
General Specifications
Detectors .................................................................. Two 7.6 cm x 2.5 cm (3 in x 1 in) thick, shielded NaI (T1) scintillation
detectors with up to 200 ft cables (NEMA 4x enclosures included.)
Display ...................................................................... 4-digit LED display with 2 cm (0.8 in.) character height
Display Range .......................................................... 000.0 to 9999
Display Units ............................................................ Can be made to display in: µR/hr, mR/hr, R/hr, µSv/h, mSv/h, Sv/h,
µrem/hr, mrem/hr, rem/hr, cpm, cps, and others
Linearity .................................................................... Readings within 10 % of true value with detector connected
Operating Range ...................................................... Depends on the type of detectors used and the units of measure
Response .................................................................. Typically 3 seconds from 10 % to 90 % of final reading
Status (green light) .................................................. Indicates the instrument is functioning properly
Low Alarm ................................................................. Indicated by a yellow light and slow beep (1 per second) audible tone
(can be set at any point from 0.0 to 9999)
High Alarm ................................................................ Indicated by a red light and a fast beep (4 per second) audible tone
(can be set at any point from 0.0 to 9999)
Note
Audible indicators can be configured as a single beep if desired.
Audio intensity is controlled by rotating the baffle on the audio
device.
DET Fail ..................................................................... Indicated by a red light and an audible tone greater than 68 dB at 2 ft
for conditions of detector overload, no count from detector or
instrument failure
Low Battery .............................................................. Indicated by a yellow light, beginning when 2 hours of battery life
remain
Connector ................................................................. Dependent upon the system
Calibration Controls ................................................ Accessible from the front of instrument (protective cover provided)
High Voltage ............................................................. Adjustable from 600 volts to 1200 volts
Dead time .................................................................. Adjustable to compensate for dead time of the detector and
electronics (can be read on the display)
Overload ................................................................... A display reading of -OL- and audible FAIL alarm indicate detector
saturation. It is normally set to initiate just above the highest range of
the detector.
Over-range ................................................................ A display reading of ˝----˝ and activated low and high alarms indicate
that the radiation field being measured has exceeded the counting
range of the instrument (or when dead time correction accounts for
more than 75 % of the displayed reading).
Data Output .............................................................. A 9-pin connector with female sockets provides 5-decade log output,
RS-232 output, signal ground connection, FAIL and HIGH ALARM
signals (current sink), and direct connection to battery and ground
RS-232 Output .......................................................... A 2 second dump for computer data logging
Remote (optional) .................................................... Model 05-446 Remote unit
Power ........................................................................ 95 Vac to 135 Vac (178 Vac to 240 Vac available) 50 Hz to 60 Hz
single phase (less than 100 mA typical, 1 amp max), 6 Volt sealed
lead acid rechargeable backup battery (Built-in)
Battery Life ............................................................... Typically 48 hours in non-alarm condition; 12 hours in alarm
condition
Battery Charger ........................................................ Battery is continuously trickle charged when the instrument is
connected to line power and turned on
Instrument Construction ......................................... Aluminum housing with ivory powder-coat finish