Digits - Keithley 6430 Instruction Manual

Auto range limits
Auto range limits are included to support the auto range change mode. For voltage and cur-
rent, the upper limit is controlled by the compliance range and cannot be programmed. For the
auto ohms mode, however, the upper limit is adjustable. The lower limit for all three functions
is programmable and must be less than or equal to the upper limit. If the lower limit is equal to
the upper limit, auto ranging is effectively disabled. When auto ranging is disabled, you can
manually change to any range below the lower limit (V, I or Ohms) or any range above the
upper limit (Ohms only).
Setting auto range limits
To set the upper or lower auto range limit press CONFIG
use the left and right cursor keys to set the limit at the ULIMIT or LLIMIT prompt. Remember
that you cannot set the upper limit in the V and I modes, but the unit will display the upper limit
with those two functions.

Digits

The display resolution of the measured reading depends on the DIGITS setting. This setting
is global, which means the digits setting selects display resolution for all measurement
functions.
The DIGITS setting has no effect on the remote reading format. The number of displayed
digits does not affect accuracy or speed. Those parameters are controlled by the SPEED setting.
Setting display resolution
There are two ways to set display resolution:
DIGITS — Press the DIGITS key until the desired number of digits is displayed.
•
• CONFIG DIGITS — Press CONFIG and then DIGITS to display the digits menu.
Place the cursor on the desired number of digits (3.5, 4.5, 5.5, or 6.5) and press
ENTER.
NOTE
The concurrent measurement (available on the secondary display by using the TOG-
GLE key) is always 5.5 digits.
Changing SPEED changes DIGITS, but changing DIGITS does not change SPEED.
Range, Digits, Speed, and Filters
or CONFIG respectively, then
▲ ▼
6-5