LUDLUM MODEL 3 Technical Manual page 17

Model 3
Ludlum Measurements, Inc.
Technical Manual
the higher the audio frequency. The audio should be turned
required, in order to reduce battery drain.
Note:
A low-battery condition results in a steady audio tone,
regardless of the position of the AUD ON-OFF switch.
F-S Toggle Switch
of the toggle switch provides 90% of full-scale meter deflection in four
seconds. In the slow, ˝
seconds. In ˝ ˝ position, there is fast response and large meter deviation. The
F
˝ position should be used for slow response and damped, meter deviation.
˝ S
Note:
The slow response position is normally used when the
instrument is displaying low numbers that require a more
stable meter movement. The fast response position is used at
high rate levels.
: Provides meter response. Selecting the fast, ˝
˝ position, 90% of full-scale meter deflection takes 22
S
Page 4-2
Section 4
when not
OFF
˝ position
F
April 2016