NF CA5350, Инструкция по эксплуатации

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4.1 Zero Check
CA5350 4-2
4.1 Zero Check
This function is used when checking offset of
CA5350
, or checking whether there is
current flowing from sensor. Turning on zero check will disconnect the center pin of
input connector (
CURRENT INPUT
) from the internal amplifiers in
CA5350
, and it will
be connected to the shield terminal of
CURRENT INPUT
connecter via a resistor about
20Ω.
Shown as
Figure4-1
, the load of sensor is kept as low impedance, and input of
CA5350
is
turned off. By adjusting
CURRENT SUPRESSION
(manual only) and turning the output
voltage of
CA5350
to 0V, if
ZERO CHECK
is turned
OFF
, it will be possible to cancel the
offset occurring in
CA5350.
For the CURRENT SUPRESSION

“4.2 Cancelling the dark current of sensor”
CURRENT INPUT
(入力切替)
フィルタ部へ
CURRENT INPUT
REAR
FRONT ON
OFF
-
+
≒20Ω
I/V GAIN
(ゼロチェック)
電流サプレッション部より
Figure 4-1 Input section circuit
Zero Check is set with Menu
ZERO CHECK
.
Z E R O S C H E C K
* O N S O F F
After selecting ON/OFF with the cursor keys
◀
,
▶
, you can apply the setting by
pressing the
ENTER
key.
Note that if
ZERO CHECK
is
ON
, current from the sensor will not be amplified and
output by
CA5350
. Be sure to turn
ZERO CHECK
to
OFF
when the input needs to be
amplified.
From current suppression
To filter
(Zero Check) (Input select)