iET PRS-330 series, Operation Manual, Page: 28 / 67

OPERATION
PRS-330 Series
16
Figure 3-3 Resistance Settings Menu
There are 5 selections available in the
RESISTANCE SETTINGS menu.
Highlight the selection and press ENTER to
change the selection.
Connection Mode: allows the user to change
between 2-Wire and 4-Wire connections.
In 2-Wire the shorting links should be connected
between the two LO terminals, and between the
two HI terminals.
In 2-Wire mode the internal trace resistance
inside the PRS-330 is automatically compensated
for, so no zero subtraction is required.
In 4-Wire mode shorting links should be removed
from the binding posts. This mode was designed
to be used with DMMs, other meters with 4
terminal (Kelvin connections) and temperature
controllers and indicator using 4 terminal RTDs.
Terminal Selection: allows selection of either
rear binding posts or front binding posts to be
connected to the source resistance.
There is no signi fi cant difference in accuracy
Switch Mode: Allows selection of Default,
Open or Short modes. When the resistance or
temperature value is changed via the front panel
or when a SOURCE:DATA command is sent
via the remote interfaces, the intermediate value
between previous value and the new value will
either be a SHORT, OPEN or undetermined in
default switching case.
Standard Values and RTD and Other Tables
Settings
have separate menus which are
described in the sections below.
3.4.5 Standard Values Menu
There are 4 selections available in the STANDARD
VALUES menu. The STANDARD VALUES
menu is only applicable to resistance values and
not RTD or Tables.
The selection of the standard values controls how
the
INC and DEC softkeys work on the Home
screen see Figure 3-1.
When a value is entered into one of the 4
selections such as Percent Value: shown in Figure
3-4 the
INC and DEC keys will then in this
example increment or decrement the resistance
value by 10% each time the key is pressed.
An
* before the selection indicates which is
active. The last selection to which a value was
entered becomes the active selection.
3.4.5.1 Set Values
The Set Value: selection allows the resistance
value to be changed by a speci fi c value in Ω s each
time the INC , increment, and DEC , decrement,
key is pressed.
Highlight Set Value: and press ENTER to
change the set value.
When a Set Value: is selected on the PRS-
330 pressing the INC and DEC softkeys will
increment the resistance value to the next
resistance value plus or minus the
Set Value .
3.4.5.2 Standard Value