22
use the
chart
the
"Accelerometer Sensitivity" axis
must
be multi-
plied or divided
by
factors
of
10 according
to
the
appropriate
accelerometer sensitivity. For example
to
measure acceleration
in
g
with
accelerometers
of
sensitivity 1.2, 12 and 120 mV /g
the
correc-
tion
factor
is
the
same, namely
-1.6.
The
factors of 10 are
taken
into account by
the
attenuator
scale.
7.
Set
the
Attenuator
to
"Ref".
8.
Set
the WEIGHTING NETWORK switch
to
"Lin".
9.
Turn
the
METER SWITCH
to
"Batt.
(Rec.)"
and check
the
condi-
tion
of
the
batteries.
10.
Turn
the METER SWITCH
to
"Fast"
and adjust
the
GAIN
ADJ
potentiometer
until
the
appropriate Sensitivity Correction
is
cor-
rectly indicated on
the
red scale.
~
2.8
Accelerometer Sensi
ti
v
it
y
..c.
::c
N~
~
(.)
(.)
E
O>
EE
x 0.1,1
,10or100
.s .£
-
r9
//
/,
/
/ /
-
/ / /
/ / /
HO
'/
/ /
-
_,_
~· ~.
---
~1'
-
·-
~.
~--
,.,.
I/
/
r12
/ / /
I /
/
-
/ /
/
1/
1/
/,
// //
r15
//
"/
/
-
/
lL
/ / /
'L
LL
/
-
'I
/I/
20
/
/ / / /
I
/ / / /
/
/
1/
- / /
/ /
'/
/ / / /
'/
//
25
/ /
1
/.
/ /
1/
8
[/
'/
- 10
-9
- 8 - 7 --6 - 5
-4
- 3 - 2 - 1 0
4
dB
27
2074
Sensitivi
ty
Correction
Fig.3.2. Sensitivity correction chart
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