MODEL 9DP-1 Operator’s Manual
Ludlum Measurements, Inc. 28 December 2015
High Level Backlight
“High Level Backlight” represents the percentage level for the backlight
when the instrument detects the least amount of ambient light. The high-level
backlight is a numeric field displayed in percentage with a default value of
100%.
6.3.2 Audio
“Audio” is a sub-menu which grants access to the “Power Up Mode,”
“Operating Mode,” and level settings associated with the built-in unimorph;
above and beyond the audio keypad switch, which offers direct user control for
changing the audio level when the USB keyboard is not connected.
Power Up Mode
“Power Up Mode” represents the state in which the audio will operate when
power is applied to the instrument and is a special field.
The definitions of the backlight power-up modes are:
Default: pre-defined by Ludlum Measurements and is the 40%.
Last: indicates that the instrument will power up in the same audio
“Operating Mode” the instrument was using at the time the instrument
was last powered down.
Off: This mode sets the audio level to 0% on power up.
On: This mode currently sets the audio level to 40%, similar to the
“Default” setting.
Operating Mode
“Operating Mode” represents the current operating mode for the audio.
“Operating Mode” is a special field with valid values of 0%, 20%, 40%, 60%,
80%, and 100%.
Alert Level
“Alert Level” represents the audio level associated with an alert message. “Alert
Level” is a numeric field with valid values from 0 to 100 displayed in percentages.