2400 Series SourceMeter
®
User’s Manual Range, Digits, Speed, and Filters 7-5
Limits evaluation
Neither the high limit nor the low limit are evaluated until the unit has switched to the
autorange mode. This means that if the unit is already on a range higher than the upper
limit, or lower than the lower limit when the limit is set, no range change will occur.
The upper limit is only evaluated if the unit has to upgrade. In other words, if you are on a
range higher than the present upper limit, and the unit autoranges down, it can still end up
on a range higher than the upper limit. The converse is true for the lower limit.
The upper and lower limits have no meaning until autoranging is turned on, but the limit
will not be evaluated unless the unit has to go through an autorange. If you are already on
the right range when you turn on autoranging, limits will not be evaluated.
Digits
The display resolution of the measured reading depends on the DIGITS setting. This set-
ting is global, which means the digits setting selects display resolution for all measure-
ment 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
TOGGLE key) is always 5½ digits.
Changing SPEED changes DIGITS, but changing DIGITS does not change
SPEED.
Remote range and digits programming
Table 7-1 summarizes the commands necessary to control range and digits. See Section 18
for more details on these commands.
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