MODEL 9DP-1 Operator’s Manual
Ludlum Measurements, Inc. 1 December 2015
Introduction
The Ludlum Model 9DP-1 is a modern, digital, hand-held pressurized ion
chamber designed to detect gamma and X-ray energies above 25 keV. It will also
see beta energies above 1 MeV. The instrument can be configured to display data
in units of either Sv, R, or Gy, and is readily changed by an administrator without
requiring a new calibration. The instrument is auto-ranging with a rate
measurement range of 0-500 mSv/h (0-50 R/hr, 0-500 mGy/h).
In addition to displaying the rate, the Model 9DP-1 includes an operator-
selectable function that additionally displays the integrated reading or the peak
reading. These two measurements are reset when the instrument is powered up
and whenever manually reset by the operator. A third function, Pulsed Mode,
locks the instrument in the highest range in order to improve pulsed radiation
response while sacrificing low radiation reading resolution.
The Model 9DP-1 features a 262K-color, 320 x 240 dpi LCD that displays each
measurement along with the instrument status. The LCD is backlit and
automatically adjusts to the surrounding ambient condition via a built-in light
sensor within the instrument.
Four simple pushbuttons located below the LCD provide all the control
functions for powering the instrument, enabling functions, adjusting the audio
output, and either acknowledging alarms or resetting function values.
The ion chamber electronics automatically zeros the detector signal so operator
adjustments are not necessary. The electronics additionally compensate for drift
due to temperature changes over a range of -10 to 40
0
C (14 to 104 °F) to within
20%.
The Model 9DP-1 includes a single USB port located at the front of the
instrument that is protected by a cover. This port is used to communicate with
the instrument during setup and calibration. Full parameter setup and calibration
requires Ludlum’s optional Dimension Interface Package (Part Number: 4293-
763). A limited set of password-controlled administrator and user-level
preferences can be adjusted by simply connecting the instrument directly to a
To Next Page
Loading...
Need help?
General
