Ludlum Measurements 334A, Operation Manual

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Model 334A Operations Manual
Ludlum Measurements, Inc 4 January 2021
Turning the Unit On
A red switch located on the side of unit below the detector head turns on the power to the
Model 334A. After pressing the switch, the Model 334A application will execute
automatically. In general, a cold startup takes about 20 seconds. If it does not, the unit
needs to be charged.
Charging the Batteries
Upon receiving a new unit, or when preparing a unit that has been shut down for a length of
time, the Lithium-Ion battery must be fully charged. The battery can be charged by plugging
the AC Adapter into a wall socket (115 VAC only) and plugging the power connector into
the jack at the lower right side of the case. A Red/Green LED next to the connector
indicates the charging state. When the LED is Red, the battery is being charged. When the
LED is Green, the battery is charged and the charger may be removed. The charging time is
approximately 3 hours.
Complete Battery Discharge
The Model 334A has persistent registry settings that are saved in non-volatile flash memory
thus keeping your program configuration settings intact if the battery is fully discharged.
Also the Model 334A application will be stored on a non-volatile SD card and will be
restored once power is returned to the unit. So after the battery is fully discharged, all that is
needed is to reconnect the unit to AC power and allow the battery to charge again.
Depending on user settings, measurement records can either be stored on the SD card or on
the My Documents folder. The default save location for log data is the My Documents
folder, but in the event of a full battery discharge, these files would not be restored. Only
files saved on the SD card can withstand a full battery discharge.
NOTE: Two charge cycles may be required for completely discharged batteries. Simply
unplug and re-plug the power connector to start a new charge cycle.
CAUTION: Verify instrument voltage input rating before connecting to a power converter.
If the wrong power converter is used, the instrument and/or power converter could be
damaged.
Power Button Functions
The unit can be put into standby/sleep mode at any time during operation by pressing the
power button. This ends all measurement processes, and turns off the pump and LCD.
From sleep mode, the unit can be turned back on by pressing the power button again.
For a full shutdown, press and hold the power button for 5 seconds. Be aware that this
clears all measurement files in My Documents. In most cases, standby mode will be
sufficient for most storage situations, and a charge of at least 50% should last the weekend.
Full shutdown should be used for shipping or storage longer than several days.