Dc Input Resistance - Picotest M3500A User Manual

FREQuency:APERture {0.01|0.1|1|MIN|MAX}
PERiod:APERture {0.01|0.1|1|MIN|MAX}
You can specify the resolution in the same units as the measurement
function, not in number of digits. For instance, specify the resolution in
volts and the frequency in hertz. The examples are in the following.
(4 1/2 digits on the 10 Vdc range)
CONF:VOLT:DC 10,0.001
(6 1/2 digits on the 1 A range)
MEAS:CURR:AC? 1,1E-6
(1000 Hz input, 0.1 Hz resolution)
CONF:FREQ 1 KHz,0.1 Hz
(50 mV resolution on the ac function)
VOLT:AC:RES 0.05

4.1.4 DC Input Resistance

Definition
To reduce the effect of loading errors due to the input resistance,
M3500A allows you 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.
59 59 59 59