Model 9DP Ion Chamber

The Ludlum Model 9DP, pressurized ion chamber meter, provides sensitive measurements of exposure and exposure rate at the microR level. It can simultaneously display the exposure rate, integrated value, and highest rate seen by the instrument. The integrated value can be reset (if desired) using one of the four convenient front-panel mounted buttons. The stunning 256-color, bit-mapped display provides an optimized presentation of the data and is accompanied with icons informing the user of the active functions and instrument status. All logged data are written in csv format to a plugged-in, industry standard, USB thumb drive for convenient retrieval by a PC spreadsheet or database program. Alarms are manifested using color changes on the display and an acknowledgeable audio output.

The Model 9DP is part of Ludlum's new Dimension series of meters employing state-of-the-art technologies that provide accessability, ergonomics, and convenient PC connectivity. The built-in USB port facilitates password-protected access to parameter settings via direct connection to a USB keyboard thus foregoing any need to install PC application software or dealing with operating system compatibility issues. Ludlum also offers an optional Dimension PC WindowsTM interface program that enables total control over the instrument and performs calibration.

Specifications

RADIATION DETECTED: beta above 1 MeV; gamma & X-rays above 25 keV
OPERATING RANGES:
With R/h units: 0-500 uR/h, 0-5 mR/h, 0-50 mR/h, 0-500 mR /h, 0-5 R/h
With Sv/h units: 0-5 uSv/h, 0-50 uSv/h, 0-500 uSv/h, 0-5 mSv/h, 0-50 mSv/h
CHAMBER VOLUME: 230 cc pressurized to 125 PSI
ACCURACY: +/-10%
RESPONSE TIME: ranges from 5 seconds in lowest range to under 2 seconds in highest range when measuring from 10% to 90% of final value
MEASUREMENT READOUTS: simultaneous display of dose rate, integrated dose, and highest dose rate (peak hold)
DATA LOGGING: Data is stored to detachable USB thumb drive in CSV format for easy retrieval by PC spreadsheet/database programs. Data points include real-time clock generated date and time with dose rate, integrated dose, and instrument status. Logging time intervals are set by PC interface program.
LCD DISPLAY: 8.9 cm (3.5 in.) diagonal, 240 H x 320 W pixels, TFT active matrix, 262 colors, 220 cd/m2
USER CONTROLS: 4 pushbuttons: instrument on/off, peak rate/integrate mode, audio on/off, alarm acknowledge/meter reset/clearing integrated dose or peak rate
AUTOMATIC FUNCTIONS: auto ranging, auto zeroing, auto LCD backlighting
AUDIO OUTPUTS: built-in unimorph speaker, > 60 dB at 0.6 meters (2 ft), audio jack for connection to optional headset
ALARMS: two levels of radiation alarms available, each are user programmable throughout entire readout range and set through a PC interface program. Other alarms include low battery and various detector failures.
TEMPERATURE RANGE: -20 to 50 °C (-40 to 122 °F)
POWER: eight rechargeable "AA" NiMH batteries, supplied with wall charger for direct connection to instrument
BATTERY LIFE: 12 to 24 hours between charges depending upon use of backlighting
USB INTERFACE: single USB port, may be connected directly to a USB keyboard to facilitate password-protected parameter changes, accepts USB thumbdrive for storing logged data, optional interface kit facilitates connection to a PC for paramater editing and calibration
CONSTRUCTION: durable plastic with metal support
SIZE: 21.9 x 11.6 x 24.5 cm (8.6 x 4.6 x 9.6 in.) (H x W x L)
WEIGHT: 1.4 kg (3.15 lb), including batteries