2307.2
Adjustment Procedure
2.9.
Rectifier Response
PEN
DRIVE:
"On"
INPUT
ATTENUATOR:
"0"
INPUT
POTENTIOMETER:
"10"
WRITING
SPEED:
"100
mm/sec"
LOWER
LIM
. FREO.:
"20
Hz"
RECTIFIER RESPONSE:
"RMS"
POTENTIOMETER RANGE:
"50
dB"
WRITING
WIDTH
: "50
mm"
PAPER
DR
IVE
FUNCTION:
"Cont.
Forward"
PAPER SPEED: "1 mm/sec"
Paper
:
OP
0102 (OP 0244)
2.10
. Frequency Response
PEN
DRIVE
:
"On"
INPUT
ATTENUATOR:
"0"
INPUT
POTENTIOMETER:
"10"
WRITING
SPEED:
"8
mm/sec"
LOWER
LIM
. FREO.:
"200
Hz"
RECTIFIER RESPONSE :
"RMS"
POTENTIOMETER RANGE:
"50
dB"
WR
ITING
WIDTH :
"50
mm"
PAPER
DRIVE
FUNCTION
:
"Cont.
Forward"
yAPER SPEED:
"1
mm/sec"
Paper:
OP
0102
(OP
0224)
WRITING
SPEED
to
"500
mm/sec"
LOWER
LIM.
FREO.
to
"200
Hz"
2 .
11.
Hum
PEN
DR
IVE:
"On"
INPUT
ATTENUATOR
:
"0"
INPUT POTENTIOMETER :
"10"
WRITING
SPEED:
"100
mm/sec"
LOWER
LIM.
FREO.:
"10
Hz"
RECTIFIER RESPONSE:
"Peak"
POTENTIOMETER RANGE :
"8
dB"
WRITING
WIDTH :
"50
mm"
PAPER
DRIVE
FUNCTION:
"Cont
.
Forward"
PAPER SPEED:
"1
mm/sec"
Paper
:
OP
0102
(OP
0224)
2 .
12
. Check
of
Range
Potentiometer
2-4
to
point 1
to
point
2
to
point
3
to
point
4
to
point
5
to point 6
Start the paper drive
by
pressing START.
Adjust the
input
signal at approx. 1000
Hz
until
the sapphire
is
on the 20 dB line.
Switch RECTIFIER RESPONSE
to
"Average".
Sapphire deflection : 10.1 dB .
Switch RECTIFIER RESPONSE
to
"Peak"
.
Sapphire deflection: 23 dB.
Disconnect the
AC
input signal and connect a
DC
voltage.
The
DC
voltage
will
give the
same
deflection when
RECTIFIER
RESPONSE
is
in position DC
as
an
RMS
voltage when RECTIFIER RESPONSE
is
in position
RMS
.
Start
the paper drive by pressing
START
.
Adjust the input signal
to
approx. 1000 Hz
until
the sapphire
is
on the
40
dB line.
Check the frequency cut-
off
for
all positions
of
LOWER
LIM
. FREO.
with
the signal frequency
correspond
ing
to
the knob position.
Deflection: 40
dB
± 0.3 dB.
Change
the frequency
to
200 kHz.
Deflection:
40
dB + 0.5 dB,
-0.2
dB.
If
necessary
adjust P 3, Frequency response.
Check
all positions
of
INPUT
ATTENUATOR.
Attenuator
step: 10 dB ± 0.2 dB.
Start the paper
by
pressing START.
Input
signal :
15
mV, 1000
Hz
.
Change
the frequency slowly towards the mains frequency and check the sapphire movement.
At
approx. 2
Hz
from
the mains frequency a beat may occur,
but
must
not
exceed 0.5 mm.
The
Range
Potentiometer consists
of
precision resistors connected
to
a contact strip
built
up
of
216 silver lamellae. A silver wiper and a silver contact strip
assure
a high signal-to·noise ratio.
The
silver lamellae should
be
cleaned
with
petrol and any metallic dust between the lamellae
removed
with
a brush.
10
.
75
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