iET PRS-300 Series, Руководство по эксплуатации, Страница: 17 / 50

PRS-300 Series
OPERATION 7
Chapter 3
OPERATION
3.1 Initial inspection and setup
This instrument was tested and carefully
inspected before shipment. It should be in
proper electrical and mechanical order upon
receipt.
An OPERATING GUIDE is attached
to the case of the instrument to provide ready
reference to speci
fi cations.
Mount the unit in a standard 19” rack if
the rack mount option is speci fi ed.
3.2 Connection
3.2.1 General Considerations
The PRS-300 Decade Resistor utilizes a
5-terminal connection. The binding posts are
standard laboratory type and readily accept
banana plugs, spade lugs, alligator clips, and
bare wire. Binding posts are located on the
front panel of the instrument unless speci
fi cally
ordered with a Rear Output option.
The Kelvin terminals consisting of a
CURRENT and a SENSE pair, each labeled
HI and LO . These minimize contact resis-
tance.
4 Wire connection the gold shorting links
must be removed on the binding posts of the
PRS-300 and the PRS-300 set to 4 Wire.
2 Wire connection the gold shorting links
must be used on the binding posts of the PRS-
300 and the PRS-300 set to 2 Wire.
See section 3.4.10 for more information
The GND terminal on all models is con-
nected to the case and to earth and chassis
grounds. This may be used as a shield terminal.
3.2.2 Electrical Considerations
The performance of the PRS-300 is direct-
ly affected by the quality of the connection to
the system under test. This is particularly true
with the precision series models having higher-
accuracy and/or lower-impedance decades.
For optimum performance, contact resis-
tance should be kept to a minimum by using
the most substantial mating connection possi-
ble, and by assuring that the connection is well
secured to the binding posts.
3.3 Condensed Operating Instructions
1. Turn on the PRS-300 ON using POWER
SWITCH
2. Select a desired resistance value in one of
the following ways:
a) Enter a value using the number keys,
then press ENTER .
b) Press a Quick Value key ( A – B) to
display a user-de fi ned value or a factory
default value.