Keithley 7037, Инструкция по эксплуатации

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Operation
5-2
Inductive loads
 Inductive reaction voltage must be lim-
ited to less than 110V in DC circuits or 110V rms, 155V peak
in AC circuits. Also consider the load when determining the
voltage limit. Clamping circuits that can be used are shown
in Figure 5-1.
Capacitive loads
 The initial surge current from a capac-
itive reactive load must be limited. Figure 5-2 shows circuits
that can be used to limit current surges. To protect the relay,
limit current to 1A. Also consider the load when determining
the current surge limit.
Figure 5-1
Limiting inductive reaction voltage
Figure 5-2
Limiting capacitive reaction current
Mainframe control of the card
The following information pertains to the Model 7037 card.
It assumes you are familiar with the operation of the Model
7001/7002 mainframe.
If you are not familiar with the operation of the mainframe,
it is recommended that you proceed to Getting Started (Sec-
tion 3) in the Model 7001 or Model 7002 Instruction Manual
after reading the following information.
Load
R
OUT 1
OUT 2
IN 1
IN 2
A. Resistor Clamped (AC or DC Voltages)
OUT 1
OUT 2
IN 1
IN 2
D
B. Diode Clamped (DC Voltages)
OUT 1
OUT 2
IN 1
IN 2
C. Zener Clamped (AC Voltages)
Load
R
OUT 1
OUT 2
IN 1
IN 2
C
D. Resistor-Capacitor Clamped (AC Voltages)
Load
Zener
Diode
Load
+
1A
FUSE
7037
1A
FUSE
1A
FUSE
7037
Diode
Zener
Diode
Diode
1A
FUSE
7037
7037
Load
R
OUT 1
OUT 2
IN 1
IN 2
A. Resistor Limited R = I Limit
Load
OUT 1
OUT 2
IN 1
IN 2
Thermistor*
(Rs)
High resistance when cold.
Low resistance when hot.
Fast thermal recovery.
B. Thermistor Limited Rs = I Limit
*
7037
1A
FUSE
V
1A
FUSE
7037
V