Ludlum Measurements 2241-2, Manual

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Model 2241-2RK Technical Manual
Section 5
Ludlum Measurements, Inc. Page 5-3 July 2012
O
PERATIONAL
C
HECK
An instrument operational check should be performed prior to each use by
exposing the detector to the supplied check source, confirming the proper
reading on each scale. See Section 2, Subsection “Operational Check,” for
further details.
R
ECALIBRATION
Recalibration should be accomplished after any maintenance or adjustment
of any kind has been performed on the instrument. Battery and cable
replacements (of same length) and exterior cleanings do not normally require
the instrument be recalibrated.
Note:
Ludlum Measurements, Inc. recommends recalibration at
intervals no greater than one year. Check the appropriate local
state and federal regulations to determine required recalibration
intervals.
Ludlum Measurements offers a full-service repair and calibration
department. We not only repair and calibrate our own instruments but most
other manufacturer’s instruments as well.
See Section 8, “Instrument Setup & Calibration,” for further details on
instrument calibration.
B
ATTERIES
The batteries should be removed and the battery contacts cleaned of any
corrosion at least every three months. If the instrument has been exposed to
a very dusty or corrosive atmosphere, more frequent battery servicing should
be used. Use a spanner wrench to unscrew the battery contact insulators,
exposing the internal contacts and battery springs. Removing the handle will
facilitate access to these contacts.
Note:
Never store the instrument over 30 days without removing the
batteries. Although this instrument will operate at very high
ambient temperatures, battery seal failure can occur at
temperatures as low as 38 °C (100
°
F).