Model 12-4 Technical Manual Section 6
Ludlum Measurements, Inc. Page 6-6 May 2016
Recalibration
Recalibration should be accomplished after maintenance or adjustments
have been performed on the instrument. Recalibration is not normally
required following instrument cleaning, battery replacement or detector
cable replacement of equal length.
Note:
Ludlum Measurements, Inc. recommends recalibration at
intervals no greater than one year. Check the appropriate
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 manufacturers’ instruments. Calibration procedures are available upon
request for customers who choose to calibrate their own instruments.
Batteries
The batteries should be removed any time the instrument is placed into
storage. Battery leakage may cause corrosion on the battery contacts, which
must be scraped off and/or washed using a paste solution made from
baking soda and water. Use a spanner wrench to unscrew the battery contact
insulators, exposing the internal contacts and battery springs. Removal of 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 may occur at
temperatures as low as 37.7 °C (100 °F).
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