MODEL 9DP-1 Operator’s Manual
Ludlum Measurements, Inc. 10 December 2015
Display
The Ludlum Model 9DP-1 is equipped with a color LCD that improves the
user’s understanding of the instrument reading, functions, and operating status, as
compared to other typical display technologies. The LCD utilizes a bit-mapped
layout to afford an optimized arrangement of all of the data available.
The LCD is sunlight readable so it can be used outdoors even in very bright
conditions. In very bright conditions the color distinction will diminish, but all the
information is still easily read.
4.1 Backlight
A built-in light sensor automatically adjusts the LCD backlighting to a level
that is optimally suited for the ambient light condition it is in or per one of
the user-designated modes described below. Adjustments to the default
levels set at the factory are possible through either the USB keyboard
connection (see Section 6) or via an optional Dimension Interface Package
(see Options, Section 11).