KEPCO BOP 5-20DL, Operator'S Manual

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BOP 5-20DL 081915
1-11
1.4.9 VOLTAGE CONTROL CHANNEL
The Bipolar Voltage Amplifier, with a fixed gain (See Table 1-1 for gain value) is connected via
the MODE switch to the Voltage Preamplifier (see Figure 3-2). If the VOLTAGE CONTROL
switch is on, the BOP output voltage can be locally controlled by means of the (front panel) (±)
10 volts bias source, from (–) 100% (through zero) to (+) 100% of the rated value. The Voltage
Preamplifier is provided with a Zero control and all its terminals are available at the Rear Pro-
gramming Connector for remote control of the output voltage. Control methods are described in
PAR. 3.4.
1.4.10 MODE SWITCH
The BOP is equipped with a front panel-mounted MODE switch, which selects bipolar voltage or
bipolar current control. See paragraph 1.4.14 for remote MODE control.
1.4.11 CURRENT CONTROL CHANNEL
The Bipolar Current Amplifier, with a fixed gain (See Table 1-2 for gain value) is connected via
the MODE switch to the Current Preamplifier (see Figure 3-4). If the CURRENT CONTROL
switch is on, the BOP output current can be locally controlled by means of the (front panel) (±)
10 volts bias source, from (–) 100% (through zero) to (+) 100% of the rated value. The Current
Preamplifier is provided with a Zero control and all its terminals are available at the Rear Pro-
gramming Connector for remote control of the output current. Control methods are described in
PAR. 3.5.
1.4.12 BOUNDING
The BOP has four output voltage/current limiting circuits (–) E
o
Limit, (+) E
o
Limit, (–) I
o
Limit
and (+) I
o
Limit for overvoltage/overcurrent protection in either operating mode (refer to Figures
3-5 and 3-3). All limiting circuits can be screwdriver adjusted by means of four front panel con-
trols. In addition, all four limits can be remotely controlled by means of 0 to 10 volt d-c control
voltages. The four limits may be programmed independently, or the (±) voltage and (±) current
limits can be controlled in pairs. The adjustable/programmable limit controls are backed-up by
front panel-adjustable limit circuits which define the four boundaries [(±) E
o
max. and (±) I
o
max.]
of the BOP, and provide protection against accidental over-programming of the adjustable limits.
The four boundary quantities, (±) E
o
max. and (±) I
o
max. as applied to the Limit Channel, are
actually about 10% greater than the rated values E
o
max. and I
o
max. for each BOP model.
Similarly, the quantities E
o
Zero and I
o
Zero are not really zero, but are approximately 0.5% of
the rated E
o
max. and I
o
max. values. (See Figure 1-4.)
FIGURE 1-4. BOUNDARIES AND LIMITS