Ludlum Measurements 48-4203, Manual

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5
N
ORMAL
O
PERATION
Normal operation begins immediately after power-on sequence. The device will display unit
1 of the first enabled mode (Mode order: Rate, Max Rate, Count). If a fault condition is
present, it will immediately change to the fault state as long as the fault is active.
5.1 Buttons
OK: The functionality of this button varies depending on the active mode. It is
described with each mode below.
UNIT: The button will advance to the next display unit in the same mode if it
is enabled.
MODE: In normal operation, this button will advance to the next enabled
mode. (If the next mode is enabled but the unit is disabled, it will be skipped.)
• In RATE or MAX modes, performing a long press (press and hold for ap-
proximately 0.5 seconds) will toggle the response time between fixed fast
and fixed slow or auto fast and auto slow. If user defined time is selected,
this feature will be ignored.
• In COUNT mode, performing a long press (press and hold for approxi-
mately 0.5 seconds) will advance the COUNT time to the next available
count time.
5.2 Status Icons
The Low Battery indicator turns on continuously when battery voltage is below
2.2 volts. The instrument is in critical battery voltage when the voltage falls
below 1.8 volts. If the instrument is currently powered by batteries while in a
critical battery state, the instrument will turn off while leaving the indicator
flashing.
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