Ion Chamber Survey Meter - Model 9DP-1
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Introduction

The Ludlum Model 9DP-1 ion chamber meter is specially designed for radiography work where pulsed fields are being measured. This instrument correctly integrates 50 nanosecond pulses (and wider) that other systems typically miss or measure inaccurately. This instrument measures both exposure and exposure rate and can simultaneously display the exposure rate with either the integrated value or 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 buttons also control instrument power, function selection, setting the speaker volume and acknowledging alarms.

The detector chamber is only pressurized to 1.7 atmospheres (20 psi), thus avoiding all (USA) HAZMAT concerns for shipping and handling. 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. Alarms are manifested using color changes on the display and an acknowledgeable audio output. The water resistant housing allows a broader range of work environments for the user.

The instrument is powered using NiMH type rechargeable batteries that deliver up to 30 hours operation between charges. Measurements can be logged to an industry standard, USB thumb drive plugged into the instrument USB port. Data are written in CSV format for convenient retrieval by a PC spreadsheet or database program.

The Model 9DP-1 is part of Ludlum's new Dimension series of meters employing state-of-the-art technologies that deliver tremendous capability, user friendliness, and convenient PC connectivity. The built-in USB port facilitates password-protected access to parameter settings via direct connection to a USB keyboard (with no additional USB ports, and no integrated mouse or trackpad) thus foregoing any need to install PC application software or dealing with operating system compatibility issues. Ludlum also offers an optional Dimension PC Windows® interface program that enables total control over the instrument and performs calibration.

Firmware and software updates are occasionally available as downloads for this instrument. Check the Firmware Downloads and