3.6 Basic Operation Examples
CA5350
3-19
3.6.4 Basic Settings
3.6.4.1 Input select
Select either the front or rear connector
(CURRENT INPUT)
of
CA5350
for input.
You can check and change the settings with MENU-
INPUT
.
I N P U T
*
F R O N T * R E A R
The figure above shows input connector of the rear panel is selected. Moving the cursor
to front or rear and pressing the
ENTER
key will set the connector selected with cursor
as the signal input connector.
3.6.4.2 Zero Check
This function is for disconnecting input connector
(CURRENT INPUT)
signal from the
internal amplifier. It is used for checking output offset of
CA5350
or whether there is
current flowing from sensor.
You can check and change the settings from MENU-
ZERO CHECK
.
Z E R O
N
C H E C K
* O N
R
O F F
The figure above shows that in the current setting,
ZERO CHECK
is
ON
(input is
disconnected from the internal amplifier). Select
ON
or
OFF
with cursor, and press the
ENTER
key to confirm the setting.
Turn
ZERO CHECK
OFF
, when amplifying signal from the sensor. Note that it will not
be amplified if the
ZERO CHECK
is
ON
.
3.6.4.3 Gain Setting
There are two types gain available in
CA5350
, namely
I/V GAIN
and
×
10 GAIN
(the gain
of output amplifier).
I/V GAIN Setting
This is the gain of current-to-voltage conversion. It can be set from Menu
GAIN
–I/V
GAIN
. The range is from
10k V/A
(10
4
) to
10G V/A
(10
10
).
G A I N
S
I / V
S
G A I N
S
1 0 0 k
S
V / A
Output Amplifier Gain Setting
This is the gain of output amplifier, which is used for amplifying the voltage signal after
the current-to-voltage conversion. Set from the Menu
GAIN
–×10 GAIN
. Select either
×1
or
×10
. The content with ‘
' mark on the left means the current setting.
G A I N
S
X 1 0
S
G A I N
S
X 1 * X 1 0
Normally, using
×1
for
×10 GAIN
will give excellent noise characteristics. However,
depending on the condition, keeping
×10 GAIN
as
×10
may be beneficial.
