Model 3030 & 3030E Series Technical Manual Section 6
Ludlum Measurements, Inc. Page 18 November 2017
Note:
The detector operating voltage must be determined and set
before the overload (OL) adjustment is performed. If the
detector operating voltage is readjusted, the OL setting must be
readjusted.
Adjust the OL control to the maximum counterclockwise position.
To simulate a light leak, expose the photomultiplier tube (PMT) to
light by pulling the tray out. Adjust the OL control until the overload
LED just begins to flicker. Confirm that the overload LED turns off
when the tray is latched closed.
Maintenance
Instrument maintenance consists of keeping the instrument clean and
periodically checking the battery and calibration.
An instrument QC Check should be performed prior to each use by
exposing the detector to a known source and confirming the proper reading
on each scale.
Recalibration should be accomplished after any maintenance or adjustment
has been performed on the instrument. Ludlum Measurements recommends
recalibration at intervals no greater than one year. Local regulations may
have precedence over this recommendation.
To maintain the life of the internal battery it is recommended that the
instrument be constantly connected to line power with the power switch in
the ON position, even when the instrument is not in use. This will keep the
internal battery fully charged.
When the instrument is used without line power, adequate charge time must
be allowed for the internal battery to recharge. If possible, leave the
instrument on with line power applied overnight and weekends. At a
minimum, allow one hour of charge time for each hour of use. If the battery
is inadvertently allowed to fully discharge, and is left in that state, constant
charging for 500 hours (three weeks) may be required for battery recovery.
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