LUDLUM MODEL 3, Техническое руководство

Страница: 17 / 43

Model 3 Technical Manual
Section 4
Ludlum Measurements, Inc. Page 4-2 April 2016
the higher the audio frequency. The audio should be turned
OFF
when not
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
: Provides meter response. Selecting the fast,
˝
F
˝
position
of the toggle switch provides 90% of full-scale meter deflection in four
seconds. In the slow,
˝ S ˝
position, 90% of full-scale meter deflection takes 22
seconds. In
˝
F
˝
position, there is fast response and large meter deviation. The
˝
S
˝
position should be used for slow response and damped, meter deviation.
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.