Keithley 2700, User Manual, Page: 98 / 500

Model 2700 Multimeter/Switch System User’s Manual Basic DMM Operation 3-7
Throughout this manual, you will encounter commands that can use the <clist> parameter.
The <clist> simply indicates that the associated command can be used to configure a scan
channel. For example:
SENSe:FUNCtion 'VOLTage:AC' ' Select ACV function.
SENSe:FUNCtion 'VOLTage:AC',(@101) ' Configure scan channel 101 for ACV.
While in the normal measurement display state, the first command simply selects the ACV
function. The second command configures channel 101 to measure ACV when it is
scanned.
See Section 7 for detailed information on scanning.
Voltage measurements (DCV and ACV)
The Model 2700 can make DCV measurements from 0.1µV to 1000V and ACV
measurements from 0.1µV to 750V RMS, 1000V peak.
DCV input resistance: 100V and 1000V ranges: 10M
Ω
100mV, 1V, and 10V ranges: >10G
Ω
|| <400pF or 10M
Ω
ACV input impedance: 1M
Ω
|| <100pF
DCV input divider
Normally, the input resistance for the 100mVDC, 1VDC, and 10VDC ranges is >10G
Ω
,
while the input resistance of the 100VDC and 1000VDC ranges is 10M
Ω
. However, the
input resistance for the three lower DCV ranges can also be set to 10M
Ω
by enabling the
input divider.
With the input resistance lowered, a more stable 0V reading is achieved with an open
input. Also, some external devices (such as a high voltage probe) must be terminated to a
10M
Ω
load.
The input divider cannot be enabled from the front panel. For remote programming, the
following command controls the input divider:
VOLT:IDIVider <b> ' Enable (ON) or disable (OFF) the DCV input divider.