Model 78 and 78-1
Technical Manual
Section 6
Ludlum Measurements, Inc.
Page 6-2
March 2021
Batteries
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.
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 37 °C (100
°
F).
