Showa 5683, Operation Manual

Page: 42 / 68

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4.3 Connection of Output to Load
Two types of outputs are available.
(1) OUTPUT 1 4
Delivers a voltage of +/-10 V and a current of +/-5 mA (into a load of 2
ｋ
Ω
or more), allowing
voltage-input type instruments such as thermal dot recorders and data acquisition devices to
be connected to OUTPUT1.
Thus output is displayed on the monitoring meter (2).
(2)OUTPUT 2 5
Delivers a voltage of +/-10 V and a current of +/-10 mA (into a load of 332
Ω
or more).
The output voltage can be varied from +/-10 V to approxi/-1 V with the level
adjustment control (18). Because this output can be displayed digitally on the digital monitor
(3), it can also be displayed as a physical amount by adjusting the output voltage (scaling).
4.3.1 Connection of Output to Data Recorder
Special care must be taken with the input level of data recorders. Especially with
frequency-modulated data recorders, if an input signal greater than the allowable input level of the
data recorder is applied, it may be over modulated, causing failure in recording. To avoid this, the
amplifier unit is capable of displaying excessive output voltage.
As shown in Fig. 4-5, if the input signal exceeds the threshold level (approxi/-10.5 V), an
LED located on the right or left side of the reading blinks for a certain period of time. An excessive
level up to a frequency of approximately 1 kHz can be checked on the monitoring meter
Care must be taken concerning the following points for connection to a data recorder.
(1) Where direct connections can be made
If a data recorder is capable of accepting a signal of more than 20 V
ｐ
-
ｐ
(+/-10V), it can be
directly connected to the amplifier unit.
Data Recorder
Ｌ
0
Voltage
dividing circuit
AS Amplifier
R
1
R
2
Ri C
i
Fig 4-6
R
0
R
0
Appx.10.5V
Fig 4-5
10V
0V
-10V
Appx.-10.5V