BNC 1201 - 6 1/2 Digit Digital Multimeter - Manual (Page 59)

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Remote Interface Operation
Use the following commands on your PC terminal to set the resolution for
your measurement.
CONFigure: ,
MEASure:? ,
SENSe::RESolution
4.1.4 DC Input Resistance
Definition
To reduce the effect of loading errors due to the input resistance, 1201
allows user to select a much larger input resistance (> 10G Ω) for low
input DC voltage (100mV, 1V and 10V) measurements. This feature is
only available for DC voltage measurements and it is not applicable to
other measurement functions.
Default
The default input resistance for all measurements is 10M Ω. Please refer
to Table 2-1 on page 24. The DC input resistance can only be changed
for measurements with 100mV, 1V or 10V range. For 100V DCV, 1000 V
DCV and other measurement functions, the input resistance is fixed at
10M Ω and can not be changed. Also note that the user selected value
is stored in a volatile memory. The default setting will be restored after
the meter has been turned off.
How to set the DC input resistance
You can set the DC input resistance either through the front panel
operation or through the remote interface operation.
Front Panel Operation
Press CONFIG + DCV , and then use ◁ and ▷ buttons to locate “INPUT
R” option. Press ENTER to select it. Then select desired value for the
input resistance by pressing ◁ or ▷ button. Press ENTER to choose it.
Two values are available: 10M Ω or > 10G Ω. The locations of these
buttons are shown with red rectangle frames in Figure 4-4.