Keithley 2700, User Manual, Page: 122 / 500

Model 2700 Multimeter/Switch System User’s Manual Basic DMM Operation 3-31
10M
Ω
and 100M
Ω
ranges
– Open sense lead detection for the 10M
Ω
and 100M
Ω
detection is slightly different and is shown in Figure 3-13 . Detection is performed at Sense
Lo only. Sense Hi is not used. It does not need to be connected to the DUT. When the
Sense Lo lead opens, the Sense Lo terminal will drift to -15mV and trip the “OVRFLOW”
message.
Figure 3-13
Open Sense Lo lead detection (10M
Ω
and 100M
Ω
ranges)
Sense HI
Input HI
Input Lo
Sense Lo
S/W Detection
I-Source
10M W DUT 1mA
-15mV
Open Sense Lo
Lead
OVRFLW
M W
2700 Reading
(10M W range)
2700
H/W Detection
S/W Detection
Not Used*
Since Sense Hi is not used for the measurement, there is no open
test lead detection for Sense Hi. The Sense Hi test lead does not
need to be connected to the DUT.
*