MODEL 9-4
Technical Manual
Section 5
Ludlum Measurements, Inc.
Page 12
June 2018
Ludlum Measurements offers a full-service repair and calibration department.
We not only repair and calibrate our own instruments, but also most other
manufacturers’ instruments. Calibration procedures are available upon request
for customers who choose to calibrate their own instruments.
STORAGE
The batteries may 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.
Although this instrument will operate at very high ambient
temperatures, battery seal failure may occur at temperatures as low
as 37 °C (100
°
F). Should battery seal failure occur, it may result
in corrosion on the battery contacts.
DESICCANT
Remove the instrument can and observe the translucent plastic desiccant box.
If the desiccant is blue, close the can and use the instrument. If the desiccant
is pink, replace with a fresh box. The restraining strap may be loosened by
pressing the center tab toward the strap.
The silica used in the desiccant box may
cause irritation to the skin if handled
directly. Please take the necessary
precautions to avoid long-term physical
contact with the silica. Should handling of the product be required,
avoid rubbing your eyes or placing your hands in or around your
mouth as the silica may also cause an irritation of the digestive
tract. Wash with mild soap and water after handling.
The pink (wet) desiccant may be recycled by placing it in an oven at 55
°C (131 °F) for two hours, or in a microwave on the HI setting for 10
seconds. If water vapor is apparent, wipe off the water and heat for
another 10 seconds. Repeat until the box and desiccant appear dry.
