Ludlum Measurements 25009185, Manual

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16 CHAPTER 2. GETTING STARTED
Figure 2.7: Detector Overload Alarm (Display Will Flash)
2.6 Instrument Use And Controls
With four front-panel buttons and one handle button (as seen in front-panel drawing in front
of manual), the Ludlum Model 3001 offers many features in a small package. Each button
may be pressed and held for a predetermined length of time, signified by instrument beeps,
to access unique instrument features. As the button is pressed, the instrument will beep to
indicate the user has reached a new level of button access.
• A short press and release, less than 1/2 second and before any instrument beeps occur,
will activate the first level of button operation. When the button is released, a single
beep will occur as an acknowledgement.
• A long press, greater than 1/2 second but less than 2 seconds, will force the instrument
to emit one beep. Release the button after the beep to activate the second level of
operation.
• An extra-long press, greater than 2 seconds and after the second instrument beep, will
activate the highest level of operation. After the second beep, the button may be re-
leased.
By default, the majority of functions are assigned to short presses of the buttons.
2.6.1 ON/ACK Button:
Used to power the Model 3001 ON and OFF.
• Power On: Press for approximately one second and release.
• Power Off: Press and hold for approximately five seconds. The display will show a 3, 2,
1 countdown after the second beep. Releasing the ON/ACK button during shutdown
will return the device to the previous state of operation. At completion of the shutdown
count, the LCD will go blank (unless a USB cable is connected in which case the USB
icon will flash).
Short Press (press and release before one beep):
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