LUDLUM MODEL 19 Manual page 10

Model 19 MICRO R METER
Ludlum Measurements, Inc.
Technical Manual
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 °C (100 °F).
Page 2-4
Section 2
February 2012